End any existing session when a sign-in is refused

A browser that still holds a session and signs in as an account outside
the household's group got the 403 page but kept its old session. The
refusal now ends that session and clears its cookie first.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -1,6 +1,13 @@
 # Runs on every push and pull request (no branch filter) so feature branches,
 # their pull requests, and dev/main are all checked. Runs directly on the
 # self-hosted act_runner; no container: key.
+#
+# The Makefile is the single build definition: CI runs `make test` and
+# `make build` so it fails whenever either target would, and the binary
+# carries the Makefile's -trimpath and version-stamped -ldflags (the
+# `make build` log shows the -X main.version=... value). `make sqlc-check`
+# fails when the committed internal/db code is stale against sqlc.yaml,
+# migrations/ and migrations/queries/.
 name: CI
 
 on: [push, pull_request]
@@ -16,45 +23,17 @@ jobs:
           go-version-file: go.mod
           cache: false
 
-      - name: gofmt
-        run: |
-          unformatted="$(gofmt -l .)"
-          if [ -n "$unformatted" ]; then
-            echo "gofmt needed:"
-            echo "$unformatted"
-            exit 1
-          fi
-
-      - name: go vet
-        run: go vet ./...
-
-      - name: go test
-        run: go test -race ./...
-
       - uses: actions/setup-node@v4
         with:
           node-version: "22"
 
-      - name: npm ci
-        working-directory: web
-        run: npm ci
+      - name: make test
+        run: make test
 
-      - name: npm run typecheck
-        working-directory: web
-        run: npm run typecheck
-
-      - name: npm test
-        working-directory: web
-        run: npm test
-
-      - name: npm run build
-        working-directory: web
-        run: npm run build
-
-      # Embed the real PWA, as `make embed` does, then build the static binary.
-      - name: go build (embedded PWA)
+      - name: make sqlc-check
         run: |
-          rm -rf internal/frontend/dist
-          mkdir -p internal/frontend/dist
-          cp -R web/dist/. internal/frontend/dist/
-          CGO_ENABLED=0 go build -o bin/mealquest ./cmd/server
+          make sqlc-install
+          make sqlc-check SQLC="$(go env GOPATH)/bin/sqlc"
+
+      - name: make build
+        run: make build

Makefile

@@ -5,6 +5,9 @@
 #   make test    gofmt check, go vet, go test -race, npm typecheck and test.
 #   make build   Build the PWA, embed it, build the static binary bin/mealquest.
 #   make docker  Build the container image from ./Dockerfile.
+#   make sqlc    Regenerate internal/db from sqlc.yaml with the pinned sqlc.
+#   make sqlc-check    Regenerate; fail if internal/db differs from the commit.
+#   make sqlc-install  Install the pinned sqlc into the Go bin directory.
 
 FRONTEND_DIST := internal/frontend/dist
 # Dirty means a tracked change outside the generated embed output, which
@@ -14,7 +17,13 @@ VERSION ?= $(shell git describe --tags --always 2>/dev/null || echo dev)$(if $(G
 IMAGE ?= mealquest:$(VERSION)
 LDFLAGS := -s -w -X main.version=$(VERSION)
 
-.PHONY: dev test go-test web-test build web embed check-embed-clean docker
+# sqlc is a dev tool only, never a go.mod dependency. Generated code records
+# the version that wrote it, so every run must use exactly this one.
+SQLC_VERSION := v1.31.1
+SQLC ?= sqlc
+SQLC_OUT := internal/db
+
+.PHONY: dev test go-test web-test build web embed check-embed-clean docker sqlc sqlc-check sqlc-install
 
 # Run both servers; Ctrl-C (or either exiting) stops both. The binary is built
 # first and run directly because `go run` would orphan its child on kill.
@@ -58,3 +67,22 @@ check-embed-clean:
 
 docker:
 	docker build --build-arg VERSION=$(VERSION) -t $(IMAGE) .
+
+# sqlc $(SQLC_VERSION) needs Go 1.26 to build; GOTOOLCHAIN=auto lets go fetch
+# it for this install only, even where the environment pins the local Go.
+sqlc-install:
+	GOTOOLCHAIN=auto go install github.com/sqlc-dev/sqlc/cmd/sqlc@$(SQLC_VERSION)
+
+# Previously generated files are removed first so a dropped query file does
+# not leave its stale output behind; hand-written files are kept.
+sqlc:
+	@v="$$($(SQLC) version)"; \
+	if [ "$$v" != "$(SQLC_VERSION)" ]; then echo "sqlc $(SQLC_VERSION) required, $(SQLC) is $$v"; exit 1; fi
+	find $(SQLC_OUT) -maxdepth 1 -name '*.go' -exec grep -l -x '// Code generated by sqlc. DO NOT EDIT.' {} + | xargs -r rm --
+	$(SQLC) generate
+
+# Fails on any difference from the committed generated code, including new
+# or deleted files.
+sqlc-check: sqlc
+	@drift="$$(git status --porcelain --untracked-files=all -- $(SQLC_OUT))"; \
+	if [ -n "$$drift" ]; then echo "internal/db is stale; run make sqlc and commit:"; echo "$$drift"; git diff -- $(SQLC_OUT); exit 1; fi

README.md

@@ -30,14 +30,27 @@ export MEALQUEST_PUBLIC_URL=http://localhost:5173
 export MEALQUEST_DATA_DIR="$HOME/.mealquest-dev"
 export MEALQUEST_SHUTDOWN_TIMEOUT=10s
 export MEALQUEST_SECRET_KEY_FILE="$HOME/.mealquest-dev/secret_key"
+# Authentik OAuth2/OpenID provider for MealQuest (redirect URI:
+# $MEALQUEST_PUBLIC_URL/auth/callback). Save its client secret to the file.
+export MEALQUEST_OIDC_ISSUER=https://auth.example.com/application/o/mealquest/
+export MEALQUEST_OIDC_CLIENT_ID=mealquest
+export MEALQUEST_OIDC_CLIENT_SECRET_FILE="$HOME/.mealquest-dev/oidc_client_secret"
+export MEALQUEST_OIDC_ALLOWED_GROUPS=mealquest-admin
+# Optional: sessions end after MEALQUEST_SESSION_IDLE unused (default 720h)
+# and always MEALQUEST_SESSION_MAX after sign-in (default 4320h).
+# export MEALQUEST_SESSION_IDLE=720h
+# export MEALQUEST_SESSION_MAX=4320h
 make dev
 ```
 
 `make dev` runs the Go server on `:8080` and the Vite dev server on `:5173`
 (which proxies `/api`, `/auth` and `/media` to `:8080`). Open
 http://localhost:5173. Configuration is environment-only and fails fast:
-every variable above is required, and secrets are read only from files named
-by `*_FILE` variables.
+every variable above is required except the commented-out session
+lifetimes (when set they must be positive, with MAX at least IDLE), and
+secrets are read only from files named by `*_FILE` variables. `MEALQUEST_PUBLIC_URL`, `MEALQUEST_OIDC_ISSUER` and the
+endpoints the issuer advertises must be `https://`; plain `http://` is
+accepted only for `localhost`, `127.0.0.1` and `[::1]`.
 
 ## Common commands
 

cmd/server/boot_test.go

@@ -0,0 +1,96 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"io/fs"
+	"log/slog"
+	"net/url"
+	"strings"
+	"testing"
+	"testing/fstest"
+	"time"
+
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/config"
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/migrations"
+)
+
+// useBootMigrations swaps bootMigrations for the test and restores it after.
+// Tests that call it must not run in parallel.
+func useBootMigrations(t *testing.T, m fstest.MapFS) {
+	t.Helper()
+	saved := bootMigrations
+	bootMigrations = m
+	t.Cleanup(func() { bootMigrations = saved })
+}
+
+var brokenMigrations = fstest.MapFS{
+	"0000_good.sql":   {Data: []byte("CREATE TABLE good (id INTEGER PRIMARY KEY);")},
+	"0001_broken.sql": {Data: []byte("CREATE TABLE broken (id INTEGER PRIMARY KEY;")},
+}
+
+func TestOpenStoreMigrationFailureStopsBoot(t *testing.T) {
+	useBootMigrations(t, brokenMigrations)
+
+	db, err := openStore(context.Background(), t.TempDir())
+	if err == nil {
+		db.Close()
+		t.Fatal("openStore succeeded with a broken migration")
+	}
+	if db != nil {
+		t.Error("openStore returned a store alongside the error")
+	}
+	if !strings.Contains(err.Error(), "0001_broken.sql") {
+		t.Errorf("error does not name the broken migration: %v", err)
+	}
+}
+
+func TestOpenStoreAppliesEmbeddedMigrations(t *testing.T) {
+	ctx := context.Background()
+	db, err := openStore(ctx, t.TempDir())
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() {
+		if err := db.Close(); err != nil {
+			t.Error(err)
+		}
+	})
+	var n int
+	if err := db.Reader.QueryRowContext(ctx, "SELECT count(*) FROM schema_migrations").Scan(&n); err != nil {
+		t.Fatal(err)
+	}
+	files, err := fs.Glob(migrations.FS, "*.sql")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if n != len(files) {
+		t.Errorf("schema_migrations has %d rows, want %d", n, len(files))
+	}
+}
+
+func TestRunMigrationFailureReturnsBeforeListening(t *testing.T) {
+	useBootMigrations(t, brokenMigrations)
+
+	var logs bytes.Buffer
+	cfg := config.Config{
+		HTTPAddr:        "127.0.0.1:0",
+		PublicURL:       &url.URL{Scheme: "http", Host: "localhost"},
+		DataDir:         t.TempDir(),
+		ShutdownTimeout: time.Second,
+	}
+	errc := make(chan error, 1)
+	go func() { errc <- run(cfg, slog.New(slog.NewJSONHandler(&logs, nil))) }()
+
+	select {
+	case err := <-errc:
+		if err == nil || !strings.Contains(err.Error(), "0001_broken.sql") {
+			t.Fatalf("run error = %v, want the broken migration's error", err)
+		}
+	case <-time.After(10 * time.Second):
+		t.Fatal("run kept going after a migration failure")
+	}
+	if strings.Contains(logs.String(), `"listening"`) {
+		t.Errorf("run started listening despite the migration failure: %s", logs.String())
+	}
+}

cmd/server/main.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"io/fs"
 	"log/slog"
 	"net/http"
 	"os"
@@ -12,9 +13,12 @@ import (
 	"syscall"
 	"time"
 
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/auth"
 	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/config"
 	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/frontend"
 	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/server"
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/store"
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/migrations"
 )
 
 // version is set at build time with -ldflags "-X main.version=<version>".
@@ -38,7 +42,33 @@ func run(cfg config.Config, logger *slog.Logger) error {
 	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
 	defer stop()
 
-	router, err := server.NewRouter(logger, version, frontend.Assets())
+	db, err := openStore(ctx, cfg.DataDir)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err := db.Close(); err != nil {
+			logger.Error("close database", "error", err)
+		}
+	}()
+
+	sessions, err := auth.NewSessionManager(db, cfg.SessionIdle, cfg.SessionMax)
+	if err != nil {
+		return err
+	}
+	authFlow, err := auth.New(ctx, auth.Config{
+		Issuer:        cfg.OIDCIssuer.String(),
+		ClientID:      cfg.OIDCClientID,
+		ClientSecret:  cfg.OIDCClientSecret.Reveal(),
+		PublicURL:     cfg.PublicURL,
+		SecretKey:     []byte(cfg.SecretKey.Reveal()),
+		AllowedGroups: cfg.OIDCAllowedGroups,
+	}, sessions, logger)
+	if err != nil {
+		return err
+	}
+
+	router, err := server.NewRouter(logger, version, authFlow, sessions, frontend.Assets())
 	if err != nil {
 		return err
 	}
@@ -73,6 +103,23 @@ func run(cfg config.Config, logger *slog.Logger) error {
 	return nil
 }
 
+// bootMigrations is the migration set applied at boot. Tests replace it to
+// prove a failing migration stops the boot.
+var bootMigrations fs.FS = migrations.FS
+
+// openStore opens the database in dataDir and applies bootMigrations. On a
+// migration failure it closes the database and returns the error.
+func openStore(ctx context.Context, dataDir string) (*store.Store, error) {
+	db, err := store.Open(ctx, dataDir)
+	if err != nil {
+		return nil, err
+	}
+	if err := store.Migrate(ctx, db.Writer, bootMigrations); err != nil {
+		return nil, errors.Join(err, db.Close())
+	}
+	return db, nil
+}
+
 // logListening logs the startup line. Only the public URL's origin is logged
 // so no credential-bearing URL component can reach the log.
 func logListening(logger *slog.Logger, cfg config.Config) {

go.mod

@@ -1,5 +1,24 @@
 module code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest
 
-go 1.25
+go 1.25.0
 
-require github.com/go-chi/chi/v5 v5.3.1
+require (
+	github.com/coreos/go-oidc/v3 v3.21.0
+	github.com/go-chi/chi/v5 v5.3.1
+	github.com/oklog/ulid/v2 v2.1.2
+	golang.org/x/oauth2 v0.36.0
+	modernc.org/sqlite v1.59.0
+)
+
+require (
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/go-jose/go-jose/v4 v4.1.4 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/mattn/go-isatty v0.0.24 // indirect
+	github.com/ncruces/go-strftime v1.0.0 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	golang.org/x/sys v0.47.0 // indirect
+	modernc.org/libc v1.75.7 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/memory v1.12.1 // indirect
+)

go.sum

@@ -1,2 +1,61 @@
+github.com/coreos/go-oidc/v3 v3.21.0 h1:wZo4Q9Pum8dYEj0eMUPrqR+kvuGkeUplbLpNCkBqoWM=
+github.com/coreos/go-oidc/v3 v3.21.0/go.mod h1:DYCf24+ncYi+XkIH97GY1+dqoRlbaSI26KVTCI9SrY4=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/go-chi/chi/v5 v5.3.1 h1:3j4HZLGZQ3JpMCrPJF/Jl3mYJfWLKBfNJ6quurUGCf8=
 github.com/go-chi/chi/v5 v5.3.1/go.mod h1:R+tYY2hNuVUUjxoPtqUdgBqevM9s9njzkTLutVsOCto=
+github.com/go-jose/go-jose/v4 v4.1.4 h1:moDMcTHmvE6Groj34emNPLs/qtYXRVcd6S7NHbHz3kA=
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+github.com/google/pprof v0.0.0-20260802141513-ef3492d7dac3/go.mod h1:jl5iWTm0/hd5PjEYEOuwAJ57L/CibdZfrqZ5XA5GrCk=
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+modernc.org/sortutil v1.2.1/go.mod h1:7ZI3a3REbai7gzCLcotuw9AC4VZVpYMjDzETGsSMqJE=
+modernc.org/sqlite v1.59.0 h1:X1es1GpqBlS/5T+vbM4HLUdaa8OtQx468DF2vrx+38A=
+modernc.org/sqlite v1.59.0/go.mod h1:+paeT2A3iPRHkQDwG7oA6Tk0zQd5woMEI8q7orfry8k=
+modernc.org/strutil v1.2.1 h1:UneZBkQA+DX2Rp35KcM69cSsNES9ly8mQWD71HKlOA0=
+modernc.org/strutil v1.2.1/go.mod h1:EHkiggD70koQxjVdSBM3JKM7k6L0FbGE5eymy9i3B9A=
+modernc.org/token v1.1.0 h1:Xl7Ap9dKaEs5kLoOQeQmPWevfnk/DM5qcLcYlA8ys6Y=
+modernc.org/token v1.1.0/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM=

internal/auth/actor.go

@@ -0,0 +1,35 @@
+package auth
+
+import (
+	"context"
+	"slices"
+)
+
+// Actor is the signed-in household member a request acts for. Handlers
+// record Actor.Subject as updated_by on edits.
+type Actor struct {
+	Subject string
+	Email   string
+	Name    string
+	Groups  []string
+}
+
+// Actor returns the household member s belongs to.
+func (s Session) Actor() Actor {
+	return Actor{Subject: s.Subject, Email: s.Email, Name: s.Name, Groups: slices.Clone(s.Groups)}
+}
+
+type actorKey struct{}
+
+// WithActor returns a copy of ctx carrying actor. The session middleware
+// calls it for every authenticated request.
+func WithActor(ctx context.Context, actor Actor) context.Context {
+	return context.WithValue(ctx, actorKey{}, actor)
+}
+
+// ActorFrom returns the actor WithActor stored in ctx. ok is false when ctx
+// has none, which behind the session middleware means a wiring bug.
+func ActorFrom(ctx context.Context) (actor Actor, ok bool) {
+	actor, ok = ctx.Value(actorKey{}).(Actor)
+	return actor, ok
+}

internal/auth/actor_test.go

@@ -0,0 +1,32 @@
+package auth
+
+import (
+	"context"
+	"slices"
+	"testing"
+)
+
+func TestActorContext(t *testing.T) {
+	t.Parallel()
+	if _, ok := ActorFrom(context.Background()); ok {
+		t.Error("ActorFrom found an actor in an empty context")
+	}
+	want := Actor{Subject: "user-123", Email: "cook@example.com", Name: "Home Cook", Groups: []string{"mealquest-admin"}}
+	got, ok := ActorFrom(WithActor(context.Background(), want))
+	if !ok || got.Subject != want.Subject || got.Email != want.Email || got.Name != want.Name || !slices.Equal(got.Groups, want.Groups) {
+		t.Errorf("ActorFrom = %+v (ok=%v), want %+v", got, ok, want)
+	}
+}
+
+func TestSessionActor(t *testing.T) {
+	t.Parallel()
+	s := Session{Subject: "user-123", Email: "cook@example.com", Name: "Home Cook", Groups: []string{"mealquest-admin"}, CSRFToken: "t"}
+	a := s.Actor()
+	if a.Subject != s.Subject || a.Email != s.Email || a.Name != s.Name || !slices.Equal(a.Groups, s.Groups) {
+		t.Errorf("Actor = %+v, want the session's identity", a)
+	}
+	a.Groups[0] = "changed"
+	if s.Groups[0] != "mealquest-admin" {
+		t.Error("Actor shares the session's groups slice")
+	}
+}

internal/auth/auth.go

@@ -0,0 +1,398 @@
+// Package auth signs the household in with Authentik over OpenID Connect.
+// The service is a confidential client: the authorization code, tokens and
+// client secret stay on the server and never reach JavaScript.
+package auth
+
+import (
+	"context"
+	"crypto/rand"
+	"crypto/subtle"
+	"errors"
+	"fmt"
+	"log/slog"
+	"net/http"
+	"net/url"
+	"slices"
+	"time"
+
+	"github.com/coreos/go-oidc/v3/oidc"
+	"github.com/go-chi/chi/v5"
+	"golang.org/x/oauth2"
+
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/secureurl"
+)
+
+// Routes owned by this package.
+const (
+	LoginPath    = "/auth/login"
+	CallbackPath = "/auth/callback"
+	LogoutPath   = "/auth/logout"
+)
+
+// providerTimeout bounds every request to the identity provider.
+const providerTimeout = 10 * time.Second
+
+// scopes requested at login.
+var scopes = []string{oidc.ScopeOpenID, "profile", "email", "groups", oidc.ScopeOfflineAccess}
+
+// Claims are the verified ID token claims handed to the session layer.
+type Claims struct {
+	Subject           string   `json:"sub"`
+	Email             string   `json:"email"`
+	EmailVerified     bool     `json:"email_verified"`
+	Name              string   `json:"name"`
+	PreferredUsername string   `json:"preferred_username"`
+	Groups            []string `json:"groups"`
+}
+
+// Sessions is the session layer. StartSession is called once per successful
+// login with claims from a verified ID token; it must set the session cookie
+// on w. EndSession is called on logout; it must end the session r carries,
+// if any, and clear the cookie on w. A returned error fails the request with
+// 500.
+type Sessions interface {
+	StartSession(w http.ResponseWriter, r *http.Request, claims Claims) error
+	EndSession(w http.ResponseWriter, r *http.Request) error
+}
+
+// Config is what New needs to reach the identity provider.
+type Config struct {
+	// Issuer is the exact issuer URL; discovery runs against it.
+	Issuer       string
+	ClientID     string
+	ClientSecret string
+	// PublicURL is the service's public URL; its origin prefixes CallbackPath
+	// to form the redirect URI.
+	PublicURL *url.URL
+	// SecretKey is the server key the login cookie's signing key derives from.
+	SecretKey []byte
+	// AllowedGroups are the household's groups; a sign-in is refused unless
+	// the account is in at least one of them.
+	AllowedGroups []string
+}
+
+// Auth serves the login and callback routes.
+type Auth struct {
+	oauth    oauth2.Config
+	verifier *oidc.IDTokenVerifier
+	provider *oidc.Provider
+	client   *http.Client
+	cookie   loginCookie
+	sessions Sessions
+	allowed  []string
+	// endSessionURL is the provider's end_session_endpoint; logout ends
+	// there so the provider's own session ends too.
+	endSessionURL string
+	logger        *slog.Logger
+}
+
+// New discovers the provider at cfg.Issuer and returns the login flow. It
+// fails if discovery fails or the issuer the provider reports differs.
+func New(ctx context.Context, cfg Config, sessions Sessions, logger *slog.Logger) (*Auth, error) {
+	switch {
+	case cfg.Issuer == "", cfg.ClientID == "", cfg.ClientSecret == "":
+		return nil, errors.New("auth: issuer, client ID and client secret are required")
+	case cfg.PublicURL == nil:
+		return nil, errors.New("auth: public URL is required")
+	case len(cfg.SecretKey) == 0:
+		return nil, errors.New("auth: secret key is required")
+	case sessions == nil:
+		return nil, errors.New("auth: session layer is required")
+	case len(cfg.AllowedGroups) == 0:
+		return nil, errors.New("auth: at least one allowed group is required")
+	}
+
+	if err := checkEndpoint("issuer", cfg.Issuer); err != nil {
+		return nil, err
+	}
+
+	client := &http.Client{Timeout: providerTimeout, CheckRedirect: checkRedirect}
+	provider, err := oidc.NewProvider(oidc.ClientContext(ctx, client), cfg.Issuer)
+	if err != nil {
+		return nil, fmt.Errorf("auth: OIDC discovery: %w", err)
+	}
+	endpoint := provider.Endpoint()
+	var discovered struct {
+		JWKSURI       string `json:"jwks_uri"`
+		EndSessionURI string `json:"end_session_endpoint"`
+	}
+	if err := provider.Claims(&discovered); err != nil {
+		return nil, fmt.Errorf("auth: OIDC discovery: %w", err)
+	}
+	// The token endpoint receives the client secret and the key set decides
+	// which tokens verify, so every endpoint used must pass the same rule.
+	for _, e := range []struct{ name, raw string }{
+		{"authorization endpoint", endpoint.AuthURL},
+		{"token endpoint", endpoint.TokenURL},
+		{"JWKS endpoint", discovered.JWKSURI},
+		{"end session endpoint", discovered.EndSessionURI},
+		// Groups come from userinfo when the ID token carries none, and the
+		// access token is sent there.
+		{"userinfo endpoint", provider.UserInfoEndpoint()},
+	} {
+		if err := checkEndpoint(e.name, e.raw); err != nil {
+			return nil, err
+		}
+	}
+	// client_secret_basic, the OIDC default; no auto-detection retries.
+	endpoint.AuthStyle = oauth2.AuthStyleInHeader
+
+	return &Auth{
+		oauth: oauth2.Config{
+			ClientID:     cfg.ClientID,
+			ClientSecret: cfg.ClientSecret,
+			Endpoint:     endpoint,
+			RedirectURL:  cfg.PublicURL.Scheme + "://" + cfg.PublicURL.Host + CallbackPath,
+			Scopes:       scopes,
+		},
+		verifier: provider.Verifier(&oidc.Config{
+			ClientID:             cfg.ClientID,
+			SupportedSigningAlgs: []string{oidc.RS256},
+		}),
+		provider:      provider,
+		client:        client,
+		allowed:       slices.Clone(cfg.AllowedGroups),
+		cookie:        newLoginCookie(cfg.SecretKey),
+		sessions:      sessions,
+		endSessionURL: discovered.EndSessionURI,
+		logger:        logger,
+	}, nil
+}
+
+// checkEndpoint applies secureurl.Check to the provider URL raw, naming the
+// endpoint in the error.
+func checkEndpoint(name, raw string) error {
+	u, err := url.Parse(raw)
+	if err != nil {
+		return fmt.Errorf("auth: OIDC %s %q is not a valid URL", name, raw)
+	}
+	if err := secureurl.Check(u); err != nil {
+		return fmt.Errorf("auth: OIDC %s %q: %w", name, raw, err)
+	}
+	return nil
+}
+
+// maxRedirects matches net/http's default redirect limit.
+const maxRedirects = 10
+
+// checkRedirect is the provider client's redirect policy. On a 307 or 308 to
+// the same host Go resends the body and Authorization header, which carry the
+// code and client secret, so every target must pass secureurl.Check and an
+// https:// request never follows a redirect to plain http://, even loopback.
+func checkRedirect(req *http.Request, via []*http.Request) error {
+	if len(via) >= maxRedirects {
+		return fmt.Errorf("stopped after %d redirects", maxRedirects)
+	}
+	if err := secureurl.Check(req.URL); err != nil {
+		return fmt.Errorf("redirect refused: %w", err)
+	}
+	if via[len(via)-1].URL.Scheme == "https" && req.URL.Scheme != "https" {
+		return errors.New("redirect refused: https:// to plain http:// downgrade")
+	}
+	return nil
+}
+
+// Mount registers GET LoginPath, GET CallbackPath and POST LogoutPath on r.
+func (a *Auth) Mount(r chi.Router) {
+	r.Get(LoginPath, a.login)
+	r.Get(CallbackPath, a.callback)
+	r.Post(LogoutPath, a.logout)
+}
+
+// EndSessionURL is the provider's end_session_endpoint.
+func (a *Auth) EndSessionURL() string { return a.endSessionURL }
+
+// login starts the authorization code flow with PKCE (S256). The optional
+// "return" query parameter must be a same-origin path; anything else fails
+// the login with 400.
+func (a *Auth) login(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Cache-Control", "no-store")
+
+	returnTo, err := returnPath(r.URL.Query().Get("return"))
+	if err != nil {
+		http.Error(w, "invalid return path", http.StatusBadRequest)
+		return
+	}
+	state := loginState{
+		State:    rand.Text(),
+		Nonce:    rand.Text(),
+		Verifier: oauth2.GenerateVerifier(),
+		Return:   returnTo,
+	}
+	if err := a.cookie.set(w, state, time.Now()); err != nil {
+		a.logger.ErrorContext(r.Context(), "set login cookie", "error", err)
+		http.Error(w, "internal error", http.StatusInternalServerError)
+		return
+	}
+	http.Redirect(w, r, a.oauth.AuthCodeURL(state.State,
+		oidc.Nonce(state.Nonce),
+		oauth2.S256ChallengeOption(state.Verifier),
+	), http.StatusFound)
+}
+
+// callback completes the flow: it checks state against the login cookie,
+// exchanges the code, verifies the ID token and nonce, then starts a session
+// if the account is in an allowed group. Membership is checked on every
+// login, so an account removed from the group is refused at its next one.
+func (a *Auth) callback(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Cache-Control", "no-store")
+	ctx := r.Context()
+	// The login cookie is single-use.
+	a.cookie.clear(w)
+
+	state, err := a.cookie.read(r, time.Now())
+	if err != nil {
+		a.logger.WarnContext(ctx, "login callback without a valid login cookie", "error", err)
+		http.Error(w, "sign-in expired; start again", http.StatusBadRequest)
+		return
+	}
+	q := r.URL.Query()
+	if subtle.ConstantTimeCompare([]byte(q.Get("state")), []byte(state.State)) != 1 {
+		a.logger.WarnContext(ctx, "login callback state mismatch")
+		http.Error(w, "sign-in state mismatch; start again", http.StatusBadRequest)
+		return
+	}
+	if q.Get("error") != "" {
+		// error and error_description are provider-supplied text; only the
+		// fixed category is logged.
+		a.logger.WarnContext(ctx, "identity provider returned an authorization error")
+		http.Error(w, "sign-in was refused", http.StatusUnauthorized)
+		return
+	}
+	code := q.Get("code")
+	if code == "" {
+		http.Error(w, "missing authorization code", http.StatusBadRequest)
+		return
+	}
+
+	claims, err := a.verify(ctx, code, state)
+	if err != nil {
+		a.logger.WarnContext(ctx, "sign-in failed", "error", err)
+		http.Error(w, "sign-in failed", http.StatusUnauthorized)
+		return
+	}
+	if !a.member(claims.Groups) {
+		if claims.Groups == nil {
+			a.logger.WarnContext(ctx, "sign-in refused: no groups claim in the ID token or userinfo", "subject", claims.Subject)
+		} else {
+			a.logger.WarnContext(ctx, "sign-in refused: not in an allowed group", "subject", claims.Subject)
+		}
+		// A session this browser already holds ends too, so a refused
+		// sign-in never leaves it signed in.
+		if err := a.sessions.EndSession(w, r); err != nil {
+			a.logger.ErrorContext(ctx, "end session", "error", err)
+			http.Error(w, "internal error", http.StatusInternalServerError)
+			return
+		}
+		a.refuse(w, r)
+		return
+	}
+	if err := a.sessions.StartSession(w, r, claims); err != nil {
+		a.logger.ErrorContext(ctx, "start session", "error", err)
+		http.Error(w, "internal error", http.StatusInternalServerError)
+		return
+	}
+	http.Redirect(w, r, state.Return, http.StatusSeeOther)
+}
+
+// logout ends the session, clears the cookie and sends the browser to the
+// provider's end_session_endpoint to end the provider session as well.
+func (a *Auth) logout(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Cache-Control", "no-store")
+	if err := a.sessions.EndSession(w, r); err != nil {
+		a.logger.ErrorContext(r.Context(), "end session", "error", err)
+		http.Error(w, "internal error", http.StatusInternalServerError)
+		return
+	}
+	http.Redirect(w, r, a.endSessionURL, http.StatusSeeOther)
+}
+
+// verify exchanges code for tokens and returns the verified ID token claims.
+// The verifier enforces RS256, issuer, audience and expiry; nonce is checked
+// here. When the ID token has no groups claim, Groups comes from userinfo;
+// it stays nil when neither has one.
+func (a *Auth) verify(ctx context.Context, code string, state loginState) (Claims, error) {
+	token, err := a.oauth.Exchange(context.WithValue(ctx, oauth2.HTTPClient, a.client), code,
+		oauth2.VerifierOption(state.Verifier))
+	if err != nil {
+		return Claims{}, exchangeError(err)
+	}
+	raw, ok := token.Extra("id_token").(string)
+	if !ok || raw == "" {
+		return Claims{}, errors.New("token response has no id_token")
+	}
+	idToken, err := a.verifier.Verify(ctx, raw)
+	if err != nil {
+		return Claims{}, fmt.Errorf("verify ID token: %w", err)
+	}
+	if subtle.ConstantTimeCompare([]byte(idToken.Nonce), []byte(state.Nonce)) != 1 {
+		return Claims{}, errors.New("ID token nonce mismatch")
+	}
+	var claims Claims
+	if err := idToken.Claims(&claims); err != nil {
+		return Claims{}, fmt.Errorf("decode ID token claims: %w", err)
+	}
+	if claims.Subject == "" {
+		return Claims{}, errors.New("ID token has no subject")
+	}
+	if claims.Groups == nil {
+		groups, err := a.userinfoGroups(ctx, token, claims.Subject)
+		if err != nil {
+			return Claims{}, err
+		}
+		claims.Groups = groups
+	}
+	return claims, nil
+}
+
+// userinfoGroups returns the groups claim from the userinfo endpoint, nil if
+// it has none. The userinfo subject must match the ID token's subject.
+func (a *Auth) userinfoGroups(ctx context.Context, token *oauth2.Token, subject string) ([]string, error) {
+	info, err := a.provider.UserInfo(oidc.ClientContext(ctx, a.client), oauth2.StaticTokenSource(token))
+	if err != nil {
+		return nil, userinfoError(err)
+	}
+	if info.Subject != subject {
+		return nil, errors.New("userinfo subject does not match the ID token")
+	}
+	var claims struct {
+		Groups []string `json:"groups"`
+	}
+	if err := info.Claims(&claims); err != nil {
+		return nil, fmt.Errorf("decode userinfo claims: %w", err)
+	}
+	return claims.Groups, nil
+}
+
+// userinfoError reduces a failed userinfo request to a fixed category, like
+// exchangeError: go-oidc's error text can carry the response body.
+func userinfoError(err error) error {
+	var transport *url.Error
+	if errors.As(err, &transport) {
+		return fmt.Errorf("userinfo: request failed: %s: %w", transport.Op, transport.Err)
+	}
+	return errors.New("userinfo: endpoint returned an unusable response")
+}
+
+// member reports whether groups contains an allowed group.
+func (a *Auth) member(groups []string) bool {
+	return slices.ContainsFunc(groups, func(g string) bool { return slices.Contains(a.allowed, g) })
+}
+
+// exchangeError reduces a failed code exchange to a fixed category and safe
+// metadata. The oauth2 error text can carry the token endpoint's response
+// body or error_description, which may echo credentials, so it is dropped.
+func exchangeError(err error) error {
+	var retrieve *oauth2.RetrieveError
+	var transport *url.Error
+	switch {
+	case errors.As(err, &retrieve):
+		return fmt.Errorf("exchange code: token endpoint rejected the request (HTTP %d)", retrieve.Response.StatusCode)
+	case errors.As(err, &transport):
+		// Request failures never carry the response. The URL is dropped: after
+		// a refused redirect it is the provider-supplied Location.
+		return fmt.Errorf("exchange code: token request failed: %s: %w", transport.Op, transport.Err)
+	default:
+		return errors.New("exchange code: token endpoint returned an unusable response")
+	}
+}

internal/auth/auth_test.go

@@ -0,0 +1,967 @@
+package auth
+
+import (
+	"bytes"
+	"context"
+	"crypto"
+	"crypto/hmac"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"io"
+	"log/slog"
+	"maps"
+	"math/big"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"slices"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/go-chi/chi/v5"
+)
+
+const (
+	testClientID     = "mealquest"
+	testClientSecret = "client-s3cret"
+	testKID          = "test-key"
+)
+
+var testPublicURL = &url.URL{Scheme: "https", Host: "meals.example.com"}
+
+// testAllowedGroups are the household's groups in tests.
+var testAllowedGroups = []string{"mealquest-admin", "mealquest-family"}
+
+// fakeProvider is an OIDC provider serving discovery, JWKS and a token
+// endpoint. Each issued code maps to the ID token the token endpoint returns.
+type fakeProvider struct {
+	t   *testing.T
+	srv *httptest.Server
+	key *rsa.PrivateKey
+
+	mu    sync.Mutex
+	codes map[string]issuedCode
+	// discoveryOverrides replace fields of the discovery document.
+	discoveryOverrides map[string]any
+	// tokenReply, when set, is returned by the token endpoint instead of a
+	// token.
+	tokenReply *tokenReply
+	// userinfo is the userinfo endpoint's response; userinfoHits counts
+	// requests to it.
+	userinfo     map[string]any
+	userinfoHits int
+	// userinfoReply, when set, is returned by the userinfo endpoint instead.
+	userinfoReply *tokenReply
+}
+
+type tokenReply struct {
+	status int
+	body   string
+}
+
+type issuedCode struct {
+	challenge string
+	idToken   string
+}
+
+func newFakeProvider(t *testing.T) *fakeProvider {
+	t.Helper()
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		t.Fatal(err)
+	}
+	p := &fakeProvider{t: t, key: key, codes: map[string]issuedCode{}}
+	mux := http.NewServeMux()
+	mux.HandleFunc("GET /.well-known/openid-configuration", p.discovery)
+	mux.HandleFunc("GET /jwks", p.jwks)
+	mux.HandleFunc("POST /token", p.token)
+	mux.HandleFunc("GET /userinfo", p.userinfoEndpoint)
+	p.srv = httptest.NewServer(mux)
+	t.Cleanup(p.srv.Close)
+	return p
+}
+
+func (p *fakeProvider) issuer() string { return p.srv.URL }
+
+func (p *fakeProvider) discovery(w http.ResponseWriter, _ *http.Request) {
+	doc := map[string]any{
+		"issuer":                                p.issuer(),
+		"authorization_endpoint":                p.issuer() + "/authorize",
+		"token_endpoint":                        p.issuer() + "/token",
+		"jwks_uri":                              p.issuer() + "/jwks",
+		"userinfo_endpoint":                     p.issuer() + "/userinfo",
+		"end_session_endpoint":                  p.issuer() + "/end-session/",
+		"response_types_supported":              []string{"code"},
+		"subject_types_supported":               []string{"public"},
+		"id_token_signing_alg_values_supported": []string{"RS256", "HS256"},
+	}
+	p.mu.Lock()
+	maps.Copy(doc, p.discoveryOverrides)
+	p.mu.Unlock()
+	writeJSON(w, doc)
+}
+
+func (p *fakeProvider) jwks(w http.ResponseWriter, _ *http.Request) {
+	writeJSON(w, map[string]any{"keys": []map[string]string{{
+		"kty": "RSA",
+		"kid": testKID,
+		"use": "sig",
+		"alg": "RS256",
+		"n":   b64(p.key.N.Bytes()),
+		"e":   b64(big.NewInt(int64(p.key.E)).Bytes()),
+	}}})
+}
+
+// token checks client authentication, the code and the PKCE verifier before
+// returning the code's ID token.
+func (p *fakeProvider) token(w http.ResponseWriter, r *http.Request) {
+	p.mu.Lock()
+	reply := p.tokenReply
+	p.mu.Unlock()
+	if reply != nil {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(reply.status)
+		io.WriteString(w, reply.body)
+		return
+	}
+	id, secret, ok := r.BasicAuth()
+	if !ok || id != testClientID || secret != testClientSecret {
+		http.Error(w, `{"error":"invalid_client"}`, http.StatusUnauthorized)
+		return
+	}
+	if err := r.ParseForm(); err != nil {
+		http.Error(w, `{"error":"invalid_request"}`, http.StatusBadRequest)
+		return
+	}
+	p.mu.Lock()
+	issued, ok := p.codes[r.PostForm.Get("code")]
+	delete(p.codes, r.PostForm.Get("code"))
+	p.mu.Unlock()
+	if r.PostForm.Get("grant_type") != "authorization_code" || !ok ||
+		challengeS256(r.PostForm.Get("code_verifier")) != issued.challenge {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusBadRequest)
+		io.WriteString(w, `{"error":"invalid_grant"}`)
+		return
+	}
+	writeJSON(w, map[string]any{
+		"access_token": "access-token",
+		"token_type":   "Bearer",
+		"expires_in":   3600,
+		"id_token":     issued.idToken,
+	})
+}
+
+// userinfoEndpoint checks the access token and returns p.userinfo, which
+// defaults to the test user without a groups claim.
+func (p *fakeProvider) userinfoEndpoint(w http.ResponseWriter, r *http.Request) {
+	if r.Header.Get("Authorization") != "Bearer access-token" {
+		http.Error(w, `{"error":"invalid_token"}`, http.StatusUnauthorized)
+		return
+	}
+	p.mu.Lock()
+	p.userinfoHits++
+	info, reply := p.userinfo, p.userinfoReply
+	p.mu.Unlock()
+	if reply != nil {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(reply.status)
+		io.WriteString(w, reply.body)
+		return
+	}
+	if info == nil {
+		info = map[string]any{"sub": "user-123", "email": "cook@example.com"}
+	}
+	writeJSON(w, info)
+}
+
+func (p *fakeProvider) setUserinfo(info map[string]any) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	p.userinfo = info
+}
+
+func (p *fakeProvider) userinfoRequests() int {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	return p.userinfoHits
+}
+
+// authorize stands in for the user signing in at the provider: it records a
+// code bound to the PKCE challenge and returns it.
+func (p *fakeProvider) authorize(challenge, idToken string) string {
+	code := rand.Text()
+	p.mu.Lock()
+	p.codes[code] = issuedCode{challenge: challenge, idToken: idToken}
+	p.mu.Unlock()
+	return code
+}
+
+// claims returns valid ID token claims for nonce.
+func (p *fakeProvider) claims(nonce string) map[string]any {
+	now := time.Now()
+	return map[string]any{
+		"iss":                p.issuer(),
+		"sub":                "user-123",
+		"aud":                testClientID,
+		"iat":                now.Unix(),
+		"exp":                now.Add(5 * time.Minute).Unix(),
+		"nonce":              nonce,
+		"email":              "cook@example.com",
+		"email_verified":     true,
+		"name":               "Home Cook",
+		"preferred_username": "cook",
+		"groups":             []string{"mealquest-admin"},
+	}
+}
+
+func (p *fakeProvider) signRS256(claims map[string]any) string {
+	return signRS256(p.t, p.key, claims)
+}
+
+func signRS256(t *testing.T, key *rsa.PrivateKey, claims map[string]any) string {
+	t.Helper()
+	signing := jwtSigningInput(t, "RS256", claims)
+	digest := sha256.Sum256([]byte(signing))
+	sig, err := rsa.SignPKCS1v15(rand.Reader, key, crypto.SHA256, digest[:])
+	if err != nil {
+		t.Fatal(err)
+	}
+	return signing + "." + b64(sig)
+}
+
+// signHS256 signs with the client secret, as in an algorithm-confusion attack.
+func (p *fakeProvider) signHS256(claims map[string]any) string {
+	signing := jwtSigningInput(p.t, "HS256", claims)
+	mac := hmac.New(sha256.New, []byte(testClientSecret))
+	mac.Write([]byte(signing))
+	return signing + "." + b64(mac.Sum(nil))
+}
+
+func jwtSigningInput(t *testing.T, alg string, claims map[string]any) string {
+	t.Helper()
+	header, err := json.Marshal(map[string]string{"alg": alg, "typ": "JWT", "kid": testKID})
+	if err != nil {
+		t.Fatal(err)
+	}
+	body, err := json.Marshal(claims)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return b64(header) + "." + b64(body)
+}
+
+func challengeS256(verifier string) string {
+	sum := sha256.Sum256([]byte(verifier))
+	return b64(sum[:])
+}
+
+func b64(b []byte) string { return base64.RawURLEncoding.EncodeToString(b) }
+
+func writeJSON(w http.ResponseWriter, v any) {
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(v)
+}
+
+// memorySessions is an in-memory Sessions that records the claims it was
+// handed and how many sessions were ended.
+type memorySessions struct {
+	mu     sync.Mutex
+	claims []Claims
+	ended  int
+	err    error
+}
+
+func (m *memorySessions) StartSession(w http.ResponseWriter, _ *http.Request, claims Claims) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	if m.err != nil {
+		return m.err
+	}
+	m.claims = append(m.claims, claims)
+	http.SetCookie(w, &http.Cookie{Name: "test_session", Value: claims.Subject})
+	return nil
+}
+
+func (m *memorySessions) EndSession(http.ResponseWriter, *http.Request) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	if m.err != nil {
+		return m.err
+	}
+	m.ended++
+	return nil
+}
+
+func (m *memorySessions) started() []Claims {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	return slices.Clone(m.claims)
+}
+
+type harness struct {
+	provider *fakeProvider
+	sessions *memorySessions
+	router   http.Handler
+	logs     *syncBuffer
+}
+
+// syncBuffer is a bytes.Buffer safe for concurrent log writes.
+type syncBuffer struct {
+	mu  sync.Mutex
+	buf bytes.Buffer
+}
+
+func (b *syncBuffer) Write(p []byte) (int, error) {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	return b.buf.Write(p)
+}
+
+func (b *syncBuffer) String() string {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	return b.buf.String()
+}
+
+func newHarness(t *testing.T) *harness {
+	t.Helper()
+	p := newFakeProvider(t)
+	sessions := &memorySessions{}
+	logs := &syncBuffer{}
+	a, err := New(context.Background(), Config{
+		Issuer:        p.issuer(),
+		ClientID:      testClientID,
+		ClientSecret:  testClientSecret,
+		PublicURL:     testPublicURL,
+		SecretKey:     []byte("server-secret-key"),
+		AllowedGroups: testAllowedGroups,
+	}, sessions, slog.New(slog.NewTextHandler(logs, nil)))
+	if err != nil {
+		t.Fatal(err)
+	}
+	r := chi.NewRouter()
+	a.Mount(r)
+	return &harness{provider: p, sessions: sessions, router: r, logs: logs}
+}
+
+func (h *harness) get(target string, cookies ...*http.Cookie) *http.Response {
+	req := httptest.NewRequest(http.MethodGet, target, nil)
+	for _, c := range cookies {
+		req.AddCookie(c)
+	}
+	rec := httptest.NewRecorder()
+	h.router.ServeHTTP(rec, req)
+	return rec.Result()
+}
+
+// login is a started login: the authorize URL's query and the login cookie.
+type login struct {
+	query  url.Values
+	cookie *http.Cookie
+}
+
+func (h *harness) login(t *testing.T, target string) login {
+	t.Helper()
+	resp := h.get(target)
+	if resp.StatusCode != http.StatusFound {
+		t.Fatalf("GET %s status = %d, want 302", target, resp.StatusCode)
+	}
+	loc, err := url.Parse(resp.Header.Get("Location"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got, want := loc.Scheme+"://"+loc.Host+loc.Path, h.provider.issuer()+"/authorize"; got != want {
+		t.Fatalf("redirect to %s, want %s", got, want)
+	}
+	var cookie *http.Cookie
+	for _, c := range resp.Cookies() {
+		if c.Name == loginCookieName {
+			cookie = c
+		}
+	}
+	if cookie == nil {
+		t.Fatalf("login set no %s cookie", loginCookieName)
+	}
+	return login{query: loc.Query(), cookie: cookie}
+}
+
+// callback completes l at the provider with idToken and calls the callback.
+func (h *harness) callback(l login, state, idToken string) *http.Response {
+	code := h.provider.authorize(l.query.Get("code_challenge"), idToken)
+	q := url.Values{"code": {code}, "state": {state}}
+	return h.get(CallbackPath+"?"+q.Encode(), l.cookie)
+}
+
+func TestLoginRedirect(t *testing.T) {
+	t.Parallel()
+	h := newHarness(t)
+	l := h.login(t, LoginPath+"?return=/plan")
+
+	want := map[string]string{
+		"client_id":             testClientID,
+		"response_type":         "code",
+		"scope":                 "openid profile email groups offline_access",
+		"redirect_uri":          "https://meals.example.com/auth/callback",
+		"code_challenge_method": "S256",
+	}
+	for k, v := range want {
+		if got := l.query.Get(k); got != v {
+			t.Errorf("authorize %s = %q, want %q", k, got, v)
+		}
+	}
+	for _, k := range []string{"state", "nonce", "code_challenge"} {
+		if l.query.Get(k) == "" {
+			t.Errorf("authorize URL has no %s", k)
+		}
+	}
+
+	c := l.cookie
+	if !c.HttpOnly || !c.Secure || c.SameSite != http.SameSiteLaxMode || c.Path != "/" {
+		t.Errorf("login cookie HttpOnly=%v Secure=%v SameSite=%v Path=%q, want HttpOnly, Secure, Lax, /",
+			c.HttpOnly, c.Secure, c.SameSite, c.Path)
+	}
+	if c.MaxAge <= 0 || c.MaxAge > 600 {
+		t.Errorf("login cookie MaxAge = %d, want 1-600 seconds", c.MaxAge)
+	}
+}
+
+func TestLoginStateIsFreshEachTime(t *testing.T) {
+	t.Parallel()
+	h := newHarness(t)
+	a, b := h.login(t, LoginPath), h.login(t, LoginPath)
+	for _, k := range []string{"state", "nonce", "code_challenge"} {
+		if a.query.Get(k) == b.query.Get(k) {
+			t.Errorf("%s repeated across logins", k)
+		}
+	}
+}
+
+func TestCallbackSuccess(t *testing.T) {
+	t.Parallel()
+	h := newHarness(t)
+	l := h.login(t, LoginPath+"?return="+url.QueryEscape("/plan?week=2026-W40"))
+
+	resp := h.callback(l, l.query.Get("state"), h.provider.signRS256(h.provider.claims(l.query.Get("nonce"))))
+
+	if resp.StatusCode != http.StatusSeeOther {
+		t.Fatalf("callback status = %d, want 303", resp.StatusCode)
+	}
+	if got := resp.Header.Get("Location"); got != "/plan?week=2026-W40" {
+		t.Errorf("callback redirect = %q, want the return path", got)
+	}
+	started := h.sessions.started()
+	want := Claims{
+		Subject:           "user-123",
+		Email:             "cook@example.com",
+		EmailVerified:     true,
+		Name:              "Home Cook",
+		PreferredUsername: "cook",
+		Groups:            []string{"mealquest-admin"},
+	}
+	if len(started) != 1 || started[0].Subject != want.Subject || started[0].Email != want.Email ||
+		started[0].Name != want.Name || started[0].PreferredUsername != want.PreferredUsername ||
+		!started[0].EmailVerified || !slices.Equal(started[0].Groups, want.Groups) {
+		t.Errorf("session started with %+v, want [%+v]", started, want)
+	}
+	assertLoginCookieCleared(t, resp)
+}
+
+func TestCallbackDefaultReturnPath(t *testing.T) {
+	t.Parallel()
+	h := newHarness(t)
+	l := h.login(t, LoginPath)
+	resp := h.callback(l, l.query.Get("state"), h.provider.signRS256(h.provider.claims(l.query.Get("nonce"))))
+	if resp.StatusCode != http.StatusSeeOther || resp.Header.Get("Location") != "/" {
+		t.Errorf("callback = %d to %q, want 303 to /", resp.StatusCode, resp.Header.Get("Location"))
+	}
+}
+
+func TestCallbackRejected(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name string
+		// state returns the state sent to the callback.
+		state func(l login) string
+		// token returns the ID token the provider issues.
+		token      func(p *fakeProvider, l login) string
+		wantStatus int
+	}{
+		{
+			name:       "mismatched state",
+			state:      func(login) string { return "attacker-state" },
+			wantStatus: http.StatusBadRequest,
+		},
+		{
+			name: "wrong nonce",
+			token: func(p *fakeProvider, _ login) string {
+				return p.signRS256(p.claims("other-nonce"))
+			},
+			wantStatus: http.StatusUnauthorized,
+		},
+		{
+			name: "missing nonce",
+			token: func(p *fakeProvider, _ login) string {
+				c := p.claims("")
+				delete(c, "nonce")
+				return p.signRS256(c)
+			},
+			wantStatus: http.StatusUnauthorized,
+		},
+		{
+			name: "HS256-signed token",
+			token: func(p *fakeProvider, l login) string {
+				return p.signHS256(p.claims(l.query.Get("nonce")))
+			},
+			wantStatus: http.StatusUnauthorized,
+		},
+		{
+			name: "expired token",
+			token: func(p *fakeProvider, l login) string {
+				c := p.claims(l.query.Get("nonce"))
+				c["iat"] = time.Now().Add(-2 * time.Hour).Unix()
+				c["exp"] = time.Now().Add(-time.Hour).Unix()
+				return p.signRS256(c)
+			},
+			wantStatus: http.StatusUnauthorized,
+		},
+		{
+			name: "wrong issuer",
+			token: func(p *fakeProvider, l login) string {
+				c := p.claims(l.query.Get("nonce"))
+				c["iss"] = "https://evil.example.com"
+				return p.signRS256(c)
+			},
+			wantStatus: http.StatusUnauthorized,
+		},
+		{
+			name: "wrong audience",
+			token: func(p *fakeProvider, l login) string {
+				c := p.claims(l.query.Get("nonce"))
+				c["aud"] = "another-client"
+				return p.signRS256(c)
+			},
+			wantStatus: http.StatusUnauthorized,
+		},
+		{
+			name: "signed by an unknown key",
+			token: func(p *fakeProvider, l login) string {
+				key, err := rsa.GenerateKey(rand.Reader, 2048)
+				if err != nil {
+					p.t.Fatal(err)
+				}
+				return signRS256(p.t, key, p.claims(l.query.Get("nonce")))
+			},
+			wantStatus: http.StatusUnauthorized,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			h := newHarness(t)
+			l := h.login(t, LoginPath)
+			state := l.query.Get("state")
+			if tc.state != nil {
+				state = tc.state(l)
+			}
+			token := h.provider.signRS256(h.provider.claims(l.query.Get("nonce")))
+			if tc.token != nil {
+				token = tc.token(h.provider, l)
+			}
+
+			resp := h.callback(l, state, token)
+
+			if resp.StatusCode != tc.wantStatus {
+				t.Errorf("callback status = %d, want %d", resp.StatusCode, tc.wantStatus)
+			}
+			if n := len(h.sessions.started()); n != 0 {
+				t.Errorf("%d sessions started, want none", n)
+			}
+			assertLoginCookieCleared(t, resp)
+		})
+	}
+}
+
+func TestCallbackWithoutLoginCookie(t *testing.T) {
+	t.Parallel()
+	h := newHarness(t)
+	l := h.login(t, LoginPath)
+	l.cookie = &http.Cookie{Name: "unrelated", Value: "x"}
+	resp := h.callback(l, l.query.Get("state"), h.provider.signRS256(h.provider.claims(l.query.Get("nonce"))))
+	if resp.StatusCode != http.StatusBadRequest {
+		t.Errorf("callback status = %d, want 400", resp.StatusCode)
+	}
+	if n := len(h.sessions.started()); n != 0 {
+		t.Errorf("%d sessions started, want none", n)
+	}
+}
+
+func TestCallbackTamperedLoginCookie(t *testing.T) {
+	t.Parallel()
+	h := newHarness(t)
+	l := h.login(t, LoginPath)
+	payload, sig, _ := strings.Cut(l.cookie.Value, ".")
+	data, err := base64.RawURLEncoding.DecodeString(payload)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var s loginState
+	if err := json.Unmarshal(data, &s); err != nil {
+		t.Fatal(err)
+	}
+	s.Return = "/somewhere-else"
+	data, err = json.Marshal(s)
+	if err != nil {
+		t.Fatal(err)
+	}
+	l.cookie = &http.Cookie{Name: loginCookieName, Value: b64(data) + "." + sig}
+
+	resp := h.callback(l, l.query.Get("state"), h.provider.signRS256(h.provider.claims(l.query.Get("nonce"))))
+	if resp.StatusCode != http.StatusBadRequest {
+		t.Errorf("callback status = %d, want 400", resp.StatusCode)
+	}
+}
+
+// The provider's error and error_description are untrusted text and never
+// reach the logs; only the fixed category does.
+func TestCallbackProviderError(t *testing.T) {
+	t.Parallel()
+	const (
+		errorMarker       = "provider-error-marker"
+		descriptionMarker = "description-marker-" + testClientSecret
+	)
+	h := newHarness(t)
+	l := h.login(t, LoginPath)
+	q := url.Values{
+		"error":             {errorMarker},
+		"error_description": {descriptionMarker},
+		"state":             {l.query.Get("state")},
+	}
+	resp := h.get(CallbackPath+"?"+q.Encode(), l.cookie)
+	if resp.StatusCode != http.StatusUnauthorized {
+		t.Errorf("callback status = %d, want 401", resp.StatusCode)
+	}
+	assertLoginCookieCleared(t, resp)
+	if n := len(h.sessions.started()); n != 0 {
+		t.Errorf("started %d sessions, want 0", n)
+	}
+	logs := h.logs.String()
+	for _, marker := range []string{errorMarker, descriptionMarker} {
+		if strings.Contains(logs, marker) {
+			t.Errorf("logs contain provider text %q: %s", marker, logs)
+		}
+	}
+	if !strings.Contains(logs, "identity provider returned an authorization error") {
+		t.Errorf("logs = %q, want the authorization error category", logs)
+	}
+}
+
+func TestCallbackSessionError(t *testing.T) {
+	t.Parallel()
+	h := newHarness(t)
+	h.sessions.err = errors.New("database down")
+	l := h.login(t, LoginPath)
+	resp := h.callback(l, l.query.Get("state"), h.provider.signRS256(h.provider.claims(l.query.Get("nonce"))))
+	if resp.StatusCode != http.StatusInternalServerError {
+		t.Errorf("callback status = %d, want 500", resp.StatusCode)
+	}
+}
+
+// A failed code exchange is logged by category and status only: the token
+// endpoint's body and error_description may echo credentials.
+func TestCallbackExchangeFailureDoesNotLogProviderResponse(t *testing.T) {
+	t.Parallel()
+	const leaked = "leaked-" + testClientSecret
+	tests := []struct {
+		name     string
+		reply    tokenReply
+		wantLogs string
+	}{
+		{
+			name:     "error response",
+			reply:    tokenReply{http.StatusBadRequest, `{"error":"invalid_grant","error_description":"` + leaked + `"}`},
+			wantLogs: "HTTP 400",
+		},
+		{
+			name:     "unparseable error response",
+			reply:    tokenReply{http.StatusInternalServerError, leaked},
+			wantLogs: "HTTP 500",
+		},
+		{
+			name:     "success without access token",
+			reply:    tokenReply{http.StatusOK, `{"id_token":"` + leaked + `"}`},
+			wantLogs: "unusable response",
+		},
+	}
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			h := newHarness(t)
+			h.provider.mu.Lock()
+			h.provider.tokenReply = &tc.reply
+			h.provider.mu.Unlock()
+			l := h.login(t, LoginPath)
+
+			resp := h.callback(l, l.query.Get("state"), "unused")
+
+			if resp.StatusCode != http.StatusUnauthorized {
+				t.Errorf("callback status = %d, want 401", resp.StatusCode)
+			}
+			logs := h.logs.String()
+			if strings.Contains(logs, leaked) {
+				t.Errorf("logs contain the provider response: %s", logs)
+			}
+			if !strings.Contains(logs, tc.wantLogs) {
+				t.Errorf("logs = %q, want %q", logs, tc.wantLogs)
+			}
+		})
+	}
+}
+
+func TestLoginCookieExpires(t *testing.T) {
+	t.Parallel()
+	c := newLoginCookie([]byte("server-secret-key"))
+	now := time.Now()
+	rec := httptest.NewRecorder()
+	if err := c.set(rec, loginState{State: "s", Nonce: "n", Verifier: "v", Return: "/"}, now); err != nil {
+		t.Fatal(err)
+	}
+	req := httptest.NewRequest(http.MethodGet, CallbackPath, nil)
+	req.AddCookie(rec.Result().Cookies()[0])
+
+	if _, err := c.read(req, now.Add(loginCookieTTL-time.Second)); err != nil {
+		t.Errorf("read before expiry: %v", err)
+	}
+	if _, err := c.read(req, now.Add(loginCookieTTL)); err == nil {
+		t.Error("read at expiry succeeded")
+	}
+}
+
+func TestLoginRejectsOffOriginReturn(t *testing.T) {
+	t.Parallel()
+	h := newHarness(t)
+	for _, ret := range []string{
+		"https://evil.example.com/",
+		"http://meals.example.com/plan",
+		"//evil.example.com/",
+		"/\\evil.example.com",
+		"\\\\evil.example.com",
+		"javascript:alert(1)",
+		"plan",
+		"/plan\r\nSet-Cookie: x=y",
+	} {
+		resp := h.get(LoginPath + "?return=" + url.QueryEscape(ret))
+		if resp.StatusCode != http.StatusBadRequest {
+			t.Errorf("return=%q: status = %d, want 400", ret, resp.StatusCode)
+		}
+		if loc := resp.Header.Get("Location"); loc != "" {
+			t.Errorf("return=%q: redirected to %q", ret, loc)
+		}
+		if len(resp.Cookies()) != 0 {
+			t.Errorf("return=%q: set cookies %v", ret, resp.Cookies())
+		}
+	}
+}
+
+func TestNewFailsWhenDiscoveryFails(t *testing.T) {
+	t.Parallel()
+	srv := httptest.NewServer(http.NotFoundHandler())
+	t.Cleanup(srv.Close)
+	_, err := New(context.Background(), Config{
+		Issuer:        srv.URL,
+		ClientID:      testClientID,
+		ClientSecret:  testClientSecret,
+		PublicURL:     testPublicURL,
+		SecretKey:     []byte("k"),
+		AllowedGroups: testAllowedGroups,
+	}, &memorySessions{}, slog.New(slog.DiscardHandler))
+	if err == nil {
+		t.Fatal("New succeeded without a discovery document")
+	}
+}
+
+func TestNewFailsOnIssuerMismatch(t *testing.T) {
+	t.Parallel()
+	p := newFakeProvider(t)
+	// Discovery trims the trailing slash, so this fetches the provider's
+	// document, which reports the issuer without it.
+	_, err := New(context.Background(), Config{
+		Issuer:        p.issuer() + "/",
+		ClientID:      testClientID,
+		ClientSecret:  testClientSecret,
+		PublicURL:     testPublicURL,
+		SecretKey:     []byte("k"),
+		AllowedGroups: testAllowedGroups,
+	}, &memorySessions{}, slog.New(slog.DiscardHandler))
+	if err == nil {
+		t.Fatal("New accepted a provider reporting a different issuer")
+	}
+}
+
+func assertLoginCookieCleared(t *testing.T, resp *http.Response) {
+	t.Helper()
+	for _, c := range resp.Cookies() {
+		if c.Name == loginCookieName && c.MaxAge < 0 {
+			return
+		}
+	}
+	t.Errorf("callback did not clear the %s cookie", loginCookieName)
+}
+
+func TestNewRejectsRemoteHTTPIssuer(t *testing.T) {
+	t.Parallel()
+	for _, issuer := range []string{"http://auth.example.com/application/o/mealquest/", "http://192.0.2.10"} {
+		_, err := New(context.Background(), Config{
+			Issuer:        issuer,
+			ClientID:      testClientID,
+			ClientSecret:  testClientSecret,
+			PublicURL:     testPublicURL,
+			SecretKey:     []byte("k"),
+			AllowedGroups: testAllowedGroups,
+		}, &memorySessions{}, slog.New(slog.DiscardHandler))
+		if err == nil || !strings.Contains(err.Error(), "issuer") {
+			t.Errorf("New(issuer %q) error = %v, want issuer rejected", issuer, err)
+		}
+	}
+}
+
+func TestNewRejectsRemoteHTTPEndpoint(t *testing.T) {
+	t.Parallel()
+	tests := []struct {
+		field, name string
+	}{
+		{"authorization_endpoint", "authorization endpoint"},
+		{"token_endpoint", "token endpoint"},
+		{"jwks_uri", "JWKS endpoint"},
+		{"end_session_endpoint", "end session endpoint"},
+		{"userinfo_endpoint", "userinfo endpoint"},
+	}
+	for _, tc := range tests {
+		t.Run(tc.field, func(t *testing.T) {
+			t.Parallel()
+			p := newFakeProvider(t)
+			p.discoveryOverrides = map[string]any{tc.field: "http://auth.example.com/" + tc.field}
+			_, err := New(context.Background(), Config{
+				Issuer:        p.issuer(),
+				ClientID:      testClientID,
+				ClientSecret:  testClientSecret,
+				PublicURL:     testPublicURL,
+				SecretKey:     []byte("k"),
+				AllowedGroups: testAllowedGroups,
+			}, &memorySessions{}, slog.New(slog.DiscardHandler))
+			if err == nil || !strings.Contains(err.Error(), tc.name) {
+				t.Errorf("New error = %v, want %s rejected", err, tc.name)
+			}
+		})
+	}
+}
+
+// A token endpoint on https:// that redirects the code exchange to plain
+// http:// must not receive a follow-up request: Go would resend the client
+// secret in the Authorization header. The plaintext target is loopback, so
+// only the downgrade rule stops it.
+func TestCallbackRefusesTokenRedirectToHTTP(t *testing.T) {
+	t.Parallel()
+	for _, status := range []int{http.StatusTemporaryRedirect, http.StatusPermanentRedirect} {
+		t.Run(http.StatusText(status), func(t *testing.T) {
+			t.Parallel()
+			var plaintextHits atomic.Int32
+			plaintext := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+				plaintextHits.Add(1)
+				http.Error(w, "unreachable", http.StatusTeapot)
+			}))
+			t.Cleanup(plaintext.Close)
+			var tlsHits atomic.Int32
+			tlsToken := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				tlsHits.Add(1)
+				http.Redirect(w, r, plaintext.URL+"/token", status)
+			}))
+			t.Cleanup(tlsToken.Close)
+
+			p := newFakeProvider(t)
+			p.discoveryOverrides = map[string]any{"token_endpoint": tlsToken.URL + "/token"}
+			sessions := &memorySessions{}
+			logs := &syncBuffer{}
+			a, err := New(context.Background(), Config{
+				Issuer:        p.issuer(),
+				ClientID:      testClientID,
+				ClientSecret:  testClientSecret,
+				PublicURL:     testPublicURL,
+				SecretKey:     []byte("server-secret-key"),
+				AllowedGroups: testAllowedGroups,
+			}, sessions, slog.New(slog.NewTextHandler(logs, nil)))
+			if err != nil {
+				t.Fatal(err)
+			}
+			// Trust the test server's certificate; the redirect policy stays.
+			a.client.Transport = tlsToken.Client().Transport
+			r := chi.NewRouter()
+			a.Mount(r)
+			h := &harness{provider: p, sessions: sessions, router: r, logs: logs}
+			l := h.login(t, LoginPath)
+
+			resp := h.callback(l, l.query.Get("state"), "unused")
+
+			if resp.StatusCode != http.StatusUnauthorized {
+				t.Errorf("callback status = %d, want 401", resp.StatusCode)
+			}
+			if n := tlsHits.Load(); n != 1 {
+				t.Errorf("https token endpoint hit %d times, want 1", n)
+			}
+			if n := plaintextHits.Load(); n != 0 {
+				t.Errorf("plaintext endpoint hit %d times, want 0", n)
+			}
+			if n := len(sessions.started()); n != 0 {
+				t.Errorf("started %d sessions, want 0", n)
+			}
+			if got := logs.String(); !strings.Contains(got, "downgrade") {
+				t.Errorf("logs = %q, want the downgrade refusal", got)
+			}
+		})
+	}
+}
+
+func TestCheckRedirect(t *testing.T) {
+	t.Parallel()
+	request := func(raw string) *http.Request {
+		req, err := http.NewRequest(http.MethodPost, raw, nil)
+		if err != nil {
+			t.Fatal(err)
+		}
+		return req
+	}
+	tests := []struct {
+		from, to string
+		ok       bool
+	}{
+		{"https://auth.example.com/token", "https://auth2.example.com/token", true},
+		{"http://127.0.0.1:9000/token", "http://localhost:9001/token", true},
+		{"http://127.0.0.1:9000/token", "https://auth.example.com/token", true},
+		{"https://auth.example.com/token", "http://auth.example.com/token", false},
+		{"https://127.0.0.1:9000/token", "http://127.0.0.1:9001/token", false},
+		{"http://127.0.0.1:9000/token", "http://auth.example.com/token", false},
+		{"https://auth.example.com/token", "ftp://auth.example.com/token", false},
+	}
+	for _, tc := range tests {
+		err := checkRedirect(request(tc.to), []*http.Request{request(tc.from)})
+		if (err == nil) != tc.ok {
+			t.Errorf("redirect %s -> %s: error = %v, want ok=%v", tc.from, tc.to, err, tc.ok)
+		}
+	}
+	via := make([]*http.Request, maxRedirects)
+	for i := range via {
+		via[i] = request("https://auth.example.com/token")
+	}
+	if err := checkRedirect(request("https://auth.example.com/token"), via); err == nil {
+		t.Errorf("redirect after %d hops: error = nil, want limit", maxRedirects)
+	}
+}

internal/auth/cookie.go

@@ -0,0 +1,124 @@
+package auth
+
+import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+	"time"
+)
+
+const (
+	loginCookieName = "__Host-mealquest_login"
+	loginCookieTTL  = 10 * time.Minute
+	// loginCookieKeyLabel separates the login cookie's signing key from other
+	// keys derived from the same server secret.
+	loginCookieKeyLabel = "mealquest auth login cookie v1"
+)
+
+// loginState travels from login to callback in the signed login cookie.
+type loginState struct {
+	State    string `json:"s"`
+	Nonce    string `json:"n"`
+	Verifier string `json:"v"`
+	Return   string `json:"r"`
+	Expires  int64  `json:"e"` // Unix seconds
+}
+
+// loginCookie signs and verifies the login cookie with HMAC-SHA256.
+type loginCookie struct {
+	key []byte
+}
+
+func newLoginCookie(secretKey []byte) loginCookie {
+	mac := hmac.New(sha256.New, secretKey)
+	mac.Write([]byte(loginCookieKeyLabel))
+	return loginCookie{key: mac.Sum(nil)}
+}
+
+func (c loginCookie) sign(payload string) string {
+	mac := hmac.New(sha256.New, c.key)
+	mac.Write([]byte(payload))
+	return base64.RawURLEncoding.EncodeToString(mac.Sum(nil))
+}
+
+func (c loginCookie) set(w http.ResponseWriter, s loginState, now time.Time) error {
+	s.Expires = now.Add(loginCookieTTL).Unix()
+	data, err := json.Marshal(s)
+	if err != nil {
+		return err
+	}
+	payload := base64.RawURLEncoding.EncodeToString(data)
+	http.SetCookie(w, &http.Cookie{
+		Name:     loginCookieName,
+		Value:    payload + "." + c.sign(payload),
+		Path:     "/",
+		MaxAge:   int(loginCookieTTL / time.Second),
+		Secure:   true,
+		HttpOnly: true,
+		// Lax so the cookie rides the provider's top-level redirect back.
+		SameSite: http.SameSiteLaxMode,
+	})
+	return nil
+}
+
+func (c loginCookie) clear(w http.ResponseWriter) {
+	http.SetCookie(w, &http.Cookie{
+		Name:     loginCookieName,
+		Path:     "/",
+		MaxAge:   -1,
+		Secure:   true,
+		HttpOnly: true,
+		SameSite: http.SameSiteLaxMode,
+	})
+}
+
+func (c loginCookie) read(r *http.Request, now time.Time) (loginState, error) {
+	cookie, err := r.Cookie(loginCookieName)
+	if err != nil {
+		return loginState{}, errors.New("login cookie missing")
+	}
+	payload, sig, ok := strings.Cut(cookie.Value, ".")
+	if !ok || !hmac.Equal([]byte(sig), []byte(c.sign(payload))) {
+		return loginState{}, errors.New("login cookie signature invalid")
+	}
+	data, err := base64.RawURLEncoding.DecodeString(payload)
+	if err != nil {
+		return loginState{}, fmt.Errorf("login cookie encoding: %w", err)
+	}
+	var s loginState
+	if err := json.Unmarshal(data, &s); err != nil {
+		return loginState{}, fmt.Errorf("login cookie payload: %w", err)
+	}
+	if now.Unix() >= s.Expires {
+		return loginState{}, errors.New("login cookie expired")
+	}
+	return s, nil
+}
+
+// returnPath validates the optional post-login return path. Empty means "/".
+// Only same-origin absolute paths are allowed: no scheme, host, protocol-
+// relative "//" prefix, backslashes or control characters.
+func returnPath(raw string) (string, error) {
+	if raw == "" {
+		return "/", nil
+	}
+	if !strings.HasPrefix(raw, "/") || strings.HasPrefix(raw, "//") || strings.ContainsRune(raw, '\\') {
+		return "", errors.New("return path must be a same-origin path")
+	}
+	for _, c := range raw {
+		if c < 0x20 || c == 0x7f {
+			return "", errors.New("return path contains a control character")
+		}
+	}
+	u, err := url.Parse(raw)
+	if err != nil || u.Scheme != "" || u.Host != "" || u.User != nil {
+		return "", errors.New("return path must be a same-origin path")
+	}
+	return raw, nil
+}

internal/auth/gate_test.go

@@ -0,0 +1,264 @@
+package auth
+
+import (
+	"context"
+	"errors"
+	"io"
+	"log/slog"
+	"net/http"
+	"net/url"
+	"slices"
+	"strings"
+	"testing"
+)
+
+// signInWith completes a login whose ID token has claims edited by edit.
+func (h *harness) signInWith(t *testing.T, edit func(claims map[string]any)) *http.Response {
+	t.Helper()
+	l := h.login(t, LoginPath)
+	c := h.provider.claims(l.query.Get("nonce"))
+	edit(c)
+	return h.callback(l, l.query.Get("state"), h.provider.signRS256(c))
+}
+
+// assertRefused checks resp is the refused-sign-in page and starts no
+// session.
+func assertRefused(t *testing.T, resp *http.Response) {
+	t.Helper()
+	if resp.StatusCode != http.StatusForbidden {
+		t.Fatalf("callback status = %d, want 403", resp.StatusCode)
+	}
+	if ct := resp.Header.Get("Content-Type"); ct != "text/html; charset=utf-8" {
+		t.Errorf("Content-Type = %q, want text/html; charset=utf-8", ct)
+	}
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, want := range []string{
+		"This kitchen is for the household only",
+		`<form method="post" action="/auth/logout">`,
+		"Sign out",
+	} {
+		if !strings.Contains(string(body), want) {
+			t.Errorf("refused page lacks %q:\n%s", want, body)
+		}
+	}
+	for _, c := range resp.Cookies() {
+		// Clearing a session cookie (negative Max-Age) is expected.
+		if (c.Name == SessionCookieName || c.Name == "test_session") && c.MaxAge >= 0 {
+			t.Errorf("refused sign-in set session cookie %s", c.Name)
+		}
+	}
+	assertLoginCookieCleared(t, resp)
+}
+
+func TestGroupGateMember(t *testing.T) {
+	t.Parallel()
+	// Any one allowed group is enough, alongside groups that are not allowed.
+	h := newHarness(t)
+	resp := h.signInWith(t, func(c map[string]any) { c["groups"] = []string{"guests", "mealquest-family"} })
+	if resp.StatusCode != http.StatusSeeOther {
+		t.Fatalf("callback status = %d, want 303", resp.StatusCode)
+	}
+	if started := h.sessions.started(); len(started) != 1 || !slices.Equal(started[0].Groups, []string{"guests", "mealquest-family"}) {
+		t.Errorf("sessions started = %+v, want one with the ID token groups", started)
+	}
+	if n := h.provider.userinfoRequests(); n != 0 {
+		t.Errorf("userinfo requested %d times, want 0 when the ID token has groups", n)
+	}
+}
+
+func TestGroupGateRefused(t *testing.T) {
+	t.Parallel()
+	tests := []struct {
+		name     string
+		groups   any // ID token groups claim; nil removes it
+		userinfo map[string]any
+	}{
+		{name: "non-member", groups: []string{"guests", "MEALQUEST-ADMIN"}},
+		{name: "empty groups claim", groups: []string{}},
+		{name: "groups claim missing from ID token and userinfo", groups: nil},
+		{
+			name:     "non-member in userinfo",
+			groups:   nil,
+			userinfo: map[string]any{"sub": "user-123", "groups": []string{"guests"}},
+		},
+	}
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			h := newHarness(t)
+			if tc.userinfo != nil {
+				h.provider.setUserinfo(tc.userinfo)
+			}
+			resp := h.signInWith(t, func(c map[string]any) {
+				if tc.groups == nil {
+					delete(c, "groups")
+				} else {
+					c["groups"] = tc.groups
+				}
+			})
+			assertRefused(t, resp)
+			if started := h.sessions.started(); len(started) != 0 {
+				t.Errorf("sessions started = %+v, want none", started)
+			}
+			if !strings.Contains(h.logs.String(), "sign-in refused") {
+				t.Errorf("refusal not logged:\n%s", h.logs.String())
+			}
+		})
+	}
+}
+
+func TestGroupGateUsesUserinfoWhenIDTokenHasNoGroups(t *testing.T) {
+	t.Parallel()
+	h := newHarness(t)
+	h.provider.setUserinfo(map[string]any{"sub": "user-123", "groups": []string{"mealquest-admin"}})
+	resp := h.signInWith(t, func(c map[string]any) { delete(c, "groups") })
+	if resp.StatusCode != http.StatusSeeOther {
+		t.Fatalf("callback status = %d, want 303", resp.StatusCode)
+	}
+	if started := h.sessions.started(); len(started) != 1 || !slices.Equal(started[0].Groups, []string{"mealquest-admin"}) {
+		t.Errorf("sessions started = %+v, want one with the userinfo groups", started)
+	}
+	if n := h.provider.userinfoRequests(); n != 1 {
+		t.Errorf("userinfo requested %d times, want 1", n)
+	}
+}
+
+func TestGroupGateUserinfoFailures(t *testing.T) {
+	t.Parallel()
+	tests := []struct {
+		name     string
+		userinfo map[string]any
+	}{
+		{"subject mismatch", map[string]any{"sub": "someone-else", "groups": []string{"mealquest-admin"}}},
+		{"malformed groups", map[string]any{"sub": "user-123", "groups": "mealquest-admin"}},
+	}
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			h := newHarness(t)
+			h.provider.setUserinfo(tc.userinfo)
+			resp := h.signInWith(t, func(c map[string]any) { delete(c, "groups") })
+			if resp.StatusCode != http.StatusUnauthorized {
+				t.Errorf("callback status = %d, want 401", resp.StatusCode)
+			}
+			if started := h.sessions.started(); len(started) != 0 {
+				t.Errorf("sessions started = %+v, want none", started)
+			}
+		})
+	}
+}
+
+// A failed userinfo request fails the sign-in without logging the
+// endpoint's response, which may echo credentials.
+func TestGroupGateUserinfoErrorNotLogged(t *testing.T) {
+	t.Parallel()
+	h := newHarness(t)
+	h.provider.mu.Lock()
+	h.provider.userinfoReply = &tokenReply{status: http.StatusInternalServerError, body: `{"error":"leaked-s3cret"}`}
+	h.provider.mu.Unlock()
+	resp := h.signInWith(t, func(c map[string]any) { delete(c, "groups") })
+	if resp.StatusCode != http.StatusUnauthorized {
+		t.Errorf("callback status = %d, want 401", resp.StatusCode)
+	}
+	if started := h.sessions.started(); len(started) != 0 {
+		t.Errorf("sessions started = %+v, want none", started)
+	}
+	logs := h.logs.String()
+	if !strings.Contains(logs, "userinfo") || strings.Contains(logs, "leaked-s3cret") {
+		t.Errorf("logs = %s, want the userinfo failure without the response body", logs)
+	}
+}
+
+// Membership is checked at every login: after removal from the group, the
+// next login is refused and starts no session.
+func TestGroupGateRemovedMemberRefusedAtNextLogin(t *testing.T) {
+	t.Parallel()
+	h := newSessionHarness(t)
+	h.signIn(t)
+	if n := len(h.rows(t)); n != 1 {
+		t.Fatalf("sessions after first login = %d, want 1", n)
+	}
+
+	resp := h.signInWith(t, func(c map[string]any) { c["groups"] = []string{"former-household"} })
+	assertRefused(t, resp)
+	if n := len(h.rows(t)); n != 1 {
+		t.Errorf("sessions after refused login = %d, want still 1", n)
+	}
+}
+
+// A refused sign-in from a browser that still holds a session ends that
+// session and clears its cookie.
+func TestGroupGateRefusalEndsExistingSession(t *testing.T) {
+	t.Parallel()
+	h := newSessionHarness(t)
+	_, cookie := h.signIn(t)
+
+	l := h.login(t, LoginPath)
+	c := h.provider.claims(l.query.Get("nonce"))
+	c["groups"] = []string{"former-household"}
+	code := h.provider.authorize(l.query.Get("code_challenge"), h.provider.signRS256(c))
+	q := url.Values{"code": {code}, "state": {l.query.Get("state")}}
+	resp := h.get(CallbackPath+"?"+q.Encode(), l.cookie, cookie)
+
+	if resp.StatusCode != http.StatusForbidden {
+		t.Fatalf("callback status = %d, want 403", resp.StatusCode)
+	}
+	if n := len(h.rows(t)); n != 0 {
+		t.Errorf("sessions after refused login = %d, want 0", n)
+	}
+	if _, err := h.use(cookie); !errors.Is(err, ErrNoSession) {
+		t.Errorf("old session lookup error = %v, want ErrNoSession", err)
+	}
+	cleared := false
+	for _, c := range resp.Cookies() {
+		cleared = cleared || (c.Name == SessionCookieName && c.MaxAge < 0)
+	}
+	if !cleared {
+		t.Error("refused sign-in did not clear the session cookie")
+	}
+}
+
+func TestGroupGateRefusalEndSessionError(t *testing.T) {
+	t.Parallel()
+	h := newHarness(t)
+	h.sessions.err = errors.New("database down")
+	resp := h.signInWith(t, func(c map[string]any) { c["groups"] = []string{"guests"} })
+	if resp.StatusCode != http.StatusInternalServerError {
+		t.Errorf("callback status = %d, want 500", resp.StatusCode)
+	}
+}
+
+func TestNewRequiresAllowedGroups(t *testing.T) {
+	t.Parallel()
+	p := newFakeProvider(t)
+	_, err := New(context.Background(), Config{
+		Issuer:       p.issuer(),
+		ClientID:     testClientID,
+		ClientSecret: testClientSecret,
+		PublicURL:    testPublicURL,
+		SecretKey:    []byte("k"),
+	}, &memorySessions{}, slog.New(slog.DiscardHandler))
+	if err == nil || !strings.Contains(err.Error(), "allowed group") {
+		t.Errorf("New error = %v, want missing allowed groups named", err)
+	}
+}
+
+func TestNewRequiresUserinfoEndpoint(t *testing.T) {
+	t.Parallel()
+	p := newFakeProvider(t)
+	p.discoveryOverrides = map[string]any{"userinfo_endpoint": nil}
+	_, err := New(context.Background(), Config{
+		Issuer:        p.issuer(),
+		ClientID:      testClientID,
+		ClientSecret:  testClientSecret,
+		PublicURL:     testPublicURL,
+		SecretKey:     []byte("k"),
+		AllowedGroups: testAllowedGroups,
+	}, &memorySessions{}, slog.New(slog.DiscardHandler))
+	if err == nil || !strings.Contains(err.Error(), "userinfo endpoint") {
+		t.Errorf("New error = %v, want the missing userinfo endpoint named", err)
+	}
+}

internal/auth/refused.go

@@ -0,0 +1,37 @@
+package auth
+
+import (
+	"io"
+	"net/http"
+)
+
+// refusedPage is shown when a sign-in succeeds at the provider but the
+// account is not in the household's group. Signing out ends the provider
+// session too, so another account can sign in.
+const refusedPage = `<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<title>MealQuest</title>
+</head>
+<body>
+<main>
+<h1>This kitchen is for the household only</h1>
+<p>The account you signed in with is not part of our kitchen.</p>
+<form method="post" action="` + LogoutPath + `">
+<button type="submit">Sign out</button>
+</form>
+</main>
+</body>
+</html>
+`
+
+// refuse writes the refused-sign-in page with 403.
+func (a *Auth) refuse(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	w.WriteHeader(http.StatusForbidden)
+	if _, err := io.WriteString(w, refusedPage); err != nil {
+		a.logger.WarnContext(r.Context(), "write refused sign-in page", "error", err)
+	}
+}

internal/auth/session.go

@@ -0,0 +1,238 @@
+package auth
+
+import (
+	"crypto/rand"
+	"crypto/sha256"
+	"database/sql"
+	"encoding/base64"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"time"
+
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/store"
+)
+
+// SessionCookieName is the session cookie. The __Host- prefix makes the
+// browser insist on Secure, Path=/ and no Domain.
+const SessionCookieName = "__Host-mealquest_session"
+
+// sessionIDBytes is the size of the random session ID: 256 bits.
+const sessionIDBytes = 32
+
+// ErrNoSession means the request carries no live session: the cookie is
+// missing or malformed, or its session is unknown, ended or expired.
+var ErrNoSession = errors.New("auth: no valid session")
+
+// Session is a signed-in household member's server-side session.
+type Session struct {
+	Subject   string
+	Email     string
+	Name      string
+	Groups    []string
+	CSRFToken string
+	CreatedAt time.Time
+	// LastSeenAt is the last time the session was used.
+	LastSeenAt time.Time
+	// ExpiresAt is when the session ends unless used again first.
+	ExpiresAt time.Time
+}
+
+// SessionManager keeps sessions in the sessions table. The cookie holds only
+// the random session ID; the table holds only its SHA-256 hash. A session
+// ends after idle without use and always max after it was created.
+type SessionManager struct {
+	db   *store.Store
+	idle time.Duration
+	max  time.Duration
+	// now is the clock; tests replace it.
+	now func() time.Time
+}
+
+// NewSessionManager returns a SessionManager over db. idle and max must be
+// positive with max >= idle.
+func NewSessionManager(db *store.Store, idle, max time.Duration) (*SessionManager, error) {
+	switch {
+	case db == nil:
+		return nil, errors.New("auth: session store is required")
+	case idle <= 0 || max <= 0:
+		return nil, errors.New("auth: session idle and max lifetimes must be positive")
+	case max < idle:
+		return nil, errors.New("auth: session max lifetime must be at least the idle lifetime")
+	}
+	return &SessionManager{db: db, idle: idle, max: max, now: time.Now}, nil
+}
+
+// StartSession creates a session for claims and sets the session cookie.
+func (m *SessionManager) StartSession(w http.ResponseWriter, r *http.Request, claims Claims) error {
+	if claims.Subject == "" {
+		return errors.New("auth: session needs a subject")
+	}
+	id, csrf := randomToken(), randomToken()
+	groups := claims.Groups
+	if groups == nil {
+		groups = []string{}
+	}
+	groupsJSON, err := json.Marshal(groups)
+	if err != nil {
+		return fmt.Errorf("auth: encode session groups: %w", err)
+	}
+
+	now := m.timestamp()
+	if _, err := m.db.Writer.ExecContext(r.Context(), `
+		INSERT INTO sessions (id_hash, subject, email, name, groups, csrf_token, created_at, last_seen_at, expires_at)
+		VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+		hashSessionID(id), claims.Subject, claims.Email, claims.Name, string(groupsJSON), csrf,
+		now, now, m.expiry(now.Time, now.Time),
+	); err != nil {
+		return fmt.Errorf("auth: create session: %w", err)
+	}
+
+	// The cookie outlives idle gaps so a returning device presents its ID;
+	// the server decides whether the session is still live. Max-Age is whole
+	// seconds, rounded up so the cookie never ends before the absolute limit.
+	http.SetCookie(w, sessionCookie(id, cookieMaxAge(m.max)))
+	return nil
+}
+
+// cookieMaxAge is lifetime in whole seconds, rounded up. It rounds the
+// quotient rather than adding to lifetime, which would overflow near the
+// largest time.Duration.
+func cookieMaxAge(lifetime time.Duration) int {
+	seconds := lifetime / time.Second
+	if lifetime%time.Second != 0 {
+		seconds++
+	}
+	return int(seconds)
+}
+
+// SessionFor returns the live session r carries and slides its last use to
+// now. It returns ErrNoSession when there is none; an expired session is
+// deleted.
+func (m *SessionManager) SessionFor(r *http.Request) (Session, error) {
+	idHash, err := sessionIDHash(r)
+	if err != nil {
+		return Session{}, err
+	}
+	now := m.timestamp()
+
+	var s Session
+	live := false
+	err = m.db.WithTx(r.Context(), func(tx *sql.Tx) error {
+		var groupsJSON string
+		var created, lastSeen, expires store.Timestamp
+		err := tx.QueryRowContext(r.Context(), `
+			SELECT subject, email, name, groups, csrf_token, created_at, last_seen_at, expires_at
+			FROM sessions WHERE id_hash = ?`, idHash,
+		).Scan(&s.Subject, &s.Email, &s.Name, &groupsJSON, &s.CSRFToken, &created, &lastSeen, &expires)
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil
+		}
+		if err != nil {
+			return fmt.Errorf("auth: read session: %w", err)
+		}
+
+		if !now.Before(expires.Time) || now.Sub(lastSeen.Time) >= m.idle || now.Sub(created.Time) >= m.max {
+			if _, err := tx.ExecContext(r.Context(), `DELETE FROM sessions WHERE id_hash = ?`, idHash); err != nil {
+				return fmt.Errorf("auth: delete expired session: %w", err)
+			}
+			return nil
+		}
+
+		if err := json.Unmarshal([]byte(groupsJSON), &s.Groups); err != nil {
+			return fmt.Errorf("auth: decode session groups: %w", err)
+		}
+		expiresAt := m.expiry(created.Time, now.Time)
+		if _, err := tx.ExecContext(r.Context(), `
+			UPDATE sessions SET last_seen_at = ?, expires_at = ? WHERE id_hash = ?`,
+			now, expiresAt, idHash,
+		); err != nil {
+			return fmt.Errorf("auth: slide session: %w", err)
+		}
+		s.CreatedAt, s.LastSeenAt, s.ExpiresAt = created.Time, now.Time, expiresAt.Time
+		live = true
+		return nil
+	})
+	if err != nil {
+		return Session{}, err
+	}
+	if !live {
+		return Session{}, ErrNoSession
+	}
+	return s, nil
+}
+
+// EndSession deletes the session r carries, if any, and clears the cookie.
+func (m *SessionManager) EndSession(w http.ResponseWriter, r *http.Request) error {
+	http.SetCookie(w, sessionCookie("", -1))
+	idHash, err := sessionIDHash(r)
+	if errors.Is(err, ErrNoSession) {
+		return nil
+	}
+	if err != nil {
+		return err
+	}
+	if _, err := m.db.Writer.ExecContext(r.Context(), `DELETE FROM sessions WHERE id_hash = ?`, idHash); err != nil {
+		return fmt.Errorf("auth: delete session: %w", err)
+	}
+	return nil
+}
+
+// timestamp is the clock's current instant at stored precision.
+func (m *SessionManager) timestamp() store.Timestamp {
+	return store.Timestamp{Time: m.now().UTC().Truncate(time.Millisecond)}
+}
+
+// expiry is when a session created at created and last used at lastSeen
+// ends: idle after lastSeen, but never later than max after created.
+func (m *SessionManager) expiry(created, lastSeen time.Time) store.Timestamp {
+	idle, absolute := lastSeen.Add(m.idle), created.Add(m.max)
+	if absolute.Before(idle) {
+		return store.Timestamp{Time: absolute}
+	}
+	return store.Timestamp{Time: idle}
+}
+
+// sessionCookie is the session cookie carrying value, with maxAge seconds;
+// a negative maxAge clears it.
+func sessionCookie(value string, maxAge int) *http.Cookie {
+	return &http.Cookie{
+		Name:     SessionCookieName,
+		Value:    value,
+		Path:     "/",
+		MaxAge:   maxAge,
+		Secure:   true,
+		HttpOnly: true,
+		SameSite: http.SameSiteLaxMode,
+	}
+}
+
+// sessionIDHash returns the stored hash of r's session ID, or ErrNoSession
+// when the cookie is missing or is not a well-formed ID.
+func sessionIDHash(r *http.Request) (string, error) {
+	c, err := r.Cookie(SessionCookieName)
+	if err != nil {
+		return "", ErrNoSession
+	}
+	raw, err := base64.RawURLEncoding.DecodeString(c.Value)
+	if err != nil || len(raw) != sessionIDBytes {
+		return "", ErrNoSession
+	}
+	return hashSessionID(c.Value), nil
+}
+
+// hashSessionID is the SHA-256 hex digest of the cookie value.
+func hashSessionID(id string) string {
+	sum := sha256.Sum256([]byte(id))
+	return hex.EncodeToString(sum[:])
+}
+
+// randomToken returns 256 random bits, base64url-encoded without padding.
+// crypto/rand.Read never returns an error; it crashes the program instead.
+func randomToken() string {
+	b := make([]byte, sessionIDBytes)
+	rand.Read(b)
+	return base64.RawURLEncoding.EncodeToString(b)
+}

internal/auth/session_test.go

@@ -0,0 +1,523 @@
+package auth
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"errors"
+	"log/slog"
+	"net/http"
+	"net/http/httptest"
+	"slices"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/go-chi/chi/v5"
+
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/store"
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/migrations"
+)
+
+const (
+	testIdle = 30 * 24 * time.Hour
+	testMax  = 180 * 24 * time.Hour
+)
+
+// testEpoch is the fake clock's starting instant.
+var testEpoch = time.Date(2026, 10, 3, 18, 30, 0, 0, time.UTC)
+
+// sessionHarness runs the real login flow against a fake provider with a
+// SessionManager over a migrated database and a fake clock.
+type sessionHarness struct {
+	*harness
+	db       *store.Store
+	sessions *SessionManager
+	auth     *Auth
+	clock    time.Time
+}
+
+func newSessionHarness(t *testing.T) *sessionHarness {
+	t.Helper()
+	ctx := context.Background()
+	db, err := store.Open(ctx, t.TempDir())
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() {
+		if err := db.Close(); err != nil {
+			t.Error(err)
+		}
+	})
+	if err := store.Migrate(ctx, db.Writer, migrations.FS); err != nil {
+		t.Fatal(err)
+	}
+	sessions, err := NewSessionManager(db, testIdle, testMax)
+	if err != nil {
+		t.Fatal(err)
+	}
+	h := &sessionHarness{db: db, sessions: sessions, clock: testEpoch}
+	sessions.now = func() time.Time { return h.clock }
+
+	p := newFakeProvider(t)
+	logs := &syncBuffer{}
+	a, err := New(ctx, Config{
+		Issuer:        p.issuer(),
+		ClientID:      testClientID,
+		ClientSecret:  testClientSecret,
+		PublicURL:     testPublicURL,
+		SecretKey:     []byte("server-secret-key"),
+		AllowedGroups: testAllowedGroups,
+	}, sessions, slog.New(slog.NewTextHandler(logs, nil)))
+	if err != nil {
+		t.Fatal(err)
+	}
+	r := chi.NewRouter()
+	a.Mount(r)
+	h.harness = &harness{provider: p, router: r, logs: logs}
+	h.auth = a
+	return h
+}
+
+func (h *sessionHarness) advance(d time.Duration) { h.clock = h.clock.Add(d) }
+
+// signIn completes a login and returns the callback response and the
+// session cookie it set.
+func (h *sessionHarness) signIn(t *testing.T) (*http.Response, *http.Cookie) {
+	t.Helper()
+	l := h.login(t, LoginPath)
+	resp := h.callback(l, l.query.Get("state"), h.provider.signRS256(h.provider.claims(l.query.Get("nonce"))))
+	if resp.StatusCode != http.StatusSeeOther {
+		t.Fatalf("callback status = %d, want 303", resp.StatusCode)
+	}
+	for _, c := range resp.Cookies() {
+		if c.Name == SessionCookieName {
+			return resp, c
+		}
+	}
+	t.Fatalf("callback set no %s cookie", SessionCookieName)
+	return nil, nil
+}
+
+// use looks up the session cookie c names.
+func (h *sessionHarness) use(c *http.Cookie) (Session, error) {
+	req := httptest.NewRequest(http.MethodGet, "/api/anything", nil)
+	if c != nil {
+		req.AddCookie(c)
+	}
+	return h.sessions.SessionFor(req)
+}
+
+type sessionRow struct {
+	idHash, subject, email, name, groups, csrf string
+	created, lastSeen, expires                 store.Timestamp
+}
+
+func (h *sessionHarness) rows(t *testing.T) []sessionRow {
+	t.Helper()
+	rs, err := h.db.Reader.Query(`SELECT id_hash, subject, email, name, groups, csrf_token,
+		created_at, last_seen_at, expires_at FROM sessions`)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer rs.Close()
+	var out []sessionRow
+	for rs.Next() {
+		var r sessionRow
+		if err := rs.Scan(&r.idHash, &r.subject, &r.email, &r.name, &r.groups, &r.csrf,
+			&r.created, &r.lastSeen, &r.expires); err != nil {
+			t.Fatal(err)
+		}
+		out = append(out, r)
+	}
+	if err := rs.Err(); err != nil {
+		t.Fatal(err)
+	}
+	return out
+}
+
+// sessionSetCookie returns the raw Set-Cookie header for the session cookie.
+func sessionSetCookie(t *testing.T, resp *http.Response) string {
+	t.Helper()
+	for _, v := range resp.Header.Values("Set-Cookie") {
+		if strings.HasPrefix(v, SessionCookieName+"=") {
+			return v
+		}
+	}
+	t.Fatalf("no Set-Cookie for %s in %q", SessionCookieName, resp.Header.Values("Set-Cookie"))
+	return ""
+}
+
+// assertSessionCookieAttributes checks the attributes the __Host- prefix
+// and D-004 require, on the raw header so nothing is lost in parsing.
+func assertSessionCookieAttributes(t *testing.T, raw string) {
+	t.Helper()
+	attrs := map[string]bool{}
+	for _, a := range strings.Split(raw, ";")[1:] {
+		name, _, _ := strings.Cut(strings.TrimSpace(a), "=")
+		attrs[strings.ToLower(name)] = true
+	}
+	for _, want := range []string{"Path=/", "HttpOnly", "Secure", "SameSite=Lax"} {
+		if !slices.Contains(strings.Split(raw, "; "), want) {
+			t.Errorf("session Set-Cookie %q lacks %s", raw, want)
+		}
+	}
+	if attrs["domain"] {
+		t.Errorf("session Set-Cookie %q has a Domain", raw)
+	}
+}
+
+func sha256Hex(s string) string {
+	sum := sha256.Sum256([]byte(s))
+	return hex.EncodeToString(sum[:])
+}
+
+func TestCallbackStartsSession(t *testing.T) {
+	t.Parallel()
+	h := newSessionHarness(t)
+	resp, cookie := h.signIn(t)
+
+	assertSessionCookieAttributes(t, sessionSetCookie(t, resp))
+	if cookie.MaxAge != int(testMax/time.Second) {
+		t.Errorf("session cookie MaxAge = %d, want %d", cookie.MaxAge, int(testMax/time.Second))
+	}
+
+	rows := h.rows(t)
+	if len(rows) != 1 {
+		t.Fatalf("sessions has %d rows, want 1", len(rows))
+	}
+	r := rows[0]
+	if len(cookie.Value) != 43 {
+		t.Errorf("session ID %q is %d chars, want 43 (256 bits, base64url)", cookie.Value, len(cookie.Value))
+	}
+	if r.idHash != sha256Hex(cookie.Value) {
+		t.Errorf("id_hash = %q, want the SHA-256 of the cookie value", r.idHash)
+	}
+	if r.subject != "user-123" || r.email != "cook@example.com" || r.name != "Home Cook" ||
+		r.groups != `["mealquest-admin"]` {
+		t.Errorf("session row = %+v, want the ID token claims", r)
+	}
+	if len(r.csrf) != 43 || r.csrf == cookie.Value {
+		t.Errorf("csrf_token = %q, want a separate 256-bit token", r.csrf)
+	}
+	if !r.created.Equal(testEpoch) || !r.lastSeen.Equal(testEpoch) || !r.expires.Equal(testEpoch.Add(testIdle)) {
+		t.Errorf("created, last_seen, expires = %v, %v, %v, want %v, %v, %v",
+			r.created, r.lastSeen, r.expires, testEpoch, testEpoch, testEpoch.Add(testIdle))
+	}
+
+	s, err := h.use(cookie)
+	if err != nil {
+		t.Fatalf("SessionFor = %v, want the new session", err)
+	}
+	if s.Subject != "user-123" || s.CSRFToken != r.csrf || !slices.Equal(s.Groups, []string{"mealquest-admin"}) {
+		t.Errorf("SessionFor = %+v", s)
+	}
+}
+
+func TestStartSessionStoresOnlyTheHash(t *testing.T) {
+	t.Parallel()
+	h := newSessionHarness(t)
+	_, cookie := h.signIn(t)
+	var n int
+	err := h.db.Reader.QueryRow(`SELECT count(*) FROM sessions WHERE
+		id_hash = ?1 OR subject = ?1 OR email = ?1 OR name = ?1 OR groups = ?1 OR csrf_token = ?1`,
+		cookie.Value).Scan(&n)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if n != 0 {
+		t.Error("the raw session ID is stored in the sessions table")
+	}
+}
+
+func TestSessionLastSeenSlides(t *testing.T) {
+	t.Parallel()
+	h := newSessionHarness(t)
+	_, cookie := h.signIn(t)
+
+	// Used every 20 days, the session outlives several idle periods.
+	for range 4 {
+		h.advance(20 * 24 * time.Hour)
+		s, err := h.use(cookie)
+		if err != nil {
+			t.Fatalf("at %v SessionFor = %v, want the session", h.clock, err)
+		}
+		if !s.LastSeenAt.Equal(h.clock) || !s.ExpiresAt.Equal(h.clock.Add(testIdle)) {
+			t.Errorf("at %v session last seen %v, expires %v, want %v, %v",
+				h.clock, s.LastSeenAt, s.ExpiresAt, h.clock, h.clock.Add(testIdle))
+		}
+		r := h.rows(t)[0]
+		if !r.lastSeen.Equal(h.clock) || !r.expires.Equal(h.clock.Add(testIdle)) || !r.created.Equal(testEpoch) {
+			t.Errorf("at %v row created %v, last seen %v, expires %v", h.clock, r.created, r.lastSeen, r.expires)
+		}
+	}
+}
+
+func TestSessionIdleExpiry(t *testing.T) {
+	t.Parallel()
+	h := newSessionHarness(t)
+	_, cookie := h.signIn(t)
+
+	h.advance(testIdle - time.Millisecond)
+	if _, err := h.use(cookie); err != nil {
+		t.Fatalf("just inside the idle limit SessionFor = %v, want the session", err)
+	}
+	h.advance(testIdle)
+	if _, err := h.use(cookie); !errors.Is(err, ErrNoSession) {
+		t.Fatalf("after idle SessionFor = %v, want ErrNoSession", err)
+	}
+	if n := len(h.rows(t)); n != 0 {
+		t.Errorf("expired session left %d rows, want 0", n)
+	}
+	// Turning the clock back cannot revive it.
+	h.clock = testEpoch
+	if _, err := h.use(cookie); !errors.Is(err, ErrNoSession) {
+		t.Errorf("after deletion SessionFor = %v, want ErrNoSession", err)
+	}
+}
+
+func TestSessionAbsoluteExpiry(t *testing.T) {
+	t.Parallel()
+	h := newSessionHarness(t)
+	_, cookie := h.signIn(t)
+
+	for h.clock.Before(testEpoch.Add(testMax - 20*24*time.Hour)) {
+		h.advance(20 * 24 * time.Hour)
+		if _, err := h.use(cookie); err != nil {
+			t.Fatalf("at %v SessionFor = %v, want the session", h.clock, err)
+		}
+	}
+	// Last used 20 days before the absolute limit: the idle window would run
+	// past it, so expiry is capped there.
+	if r := h.rows(t)[0]; !r.expires.Equal(testEpoch.Add(testMax)) {
+		t.Errorf("expires_at = %v, want the absolute limit %v", r.expires, testEpoch.Add(testMax))
+	}
+
+	h.clock = testEpoch.Add(testMax - time.Millisecond)
+	if _, err := h.use(cookie); err != nil {
+		t.Fatalf("just inside the absolute limit SessionFor = %v, want the session", err)
+	}
+	h.clock = testEpoch.Add(testMax)
+	if _, err := h.use(cookie); !errors.Is(err, ErrNoSession) {
+		t.Fatalf("at the absolute limit, used 1ms ago, SessionFor = %v, want ErrNoSession", err)
+	}
+	if n := len(h.rows(t)); n != 0 {
+		t.Errorf("expired session left %d rows, want 0", n)
+	}
+}
+
+// A max with fractional seconds rounds the cookie Max-Age up, so the browser
+// keeps the cookie until the server-side absolute limit.
+func TestSessionCookieOutlivesFractionalMax(t *testing.T) {
+	t.Parallel()
+	h := newSessionHarness(t)
+	h.sessions.idle, h.sessions.max = 1500*time.Millisecond, 2500*time.Millisecond
+	_, cookie := h.signIn(t)
+	if cookie.MaxAge != 3 {
+		t.Errorf("session cookie MaxAge = %d, want 3", cookie.MaxAge)
+	}
+	if r := h.rows(t)[0]; !r.expires.Equal(testEpoch.Add(1500 * time.Millisecond)) {
+		t.Errorf("expires_at = %v, want %v", r.expires, testEpoch.Add(1500*time.Millisecond))
+	}
+
+	h.advance(time.Second)
+	if _, err := h.use(cookie); err != nil {
+		t.Fatalf("at 1s SessionFor = %v, want the session", err)
+	}
+	h.clock = testEpoch.Add(2500*time.Millisecond - time.Millisecond)
+	if _, err := h.use(cookie); err != nil {
+		t.Fatalf("just inside the absolute limit SessionFor = %v, want the session", err)
+	}
+	h.clock = testEpoch.Add(2500 * time.Millisecond)
+	if _, err := h.use(cookie); !errors.Is(err, ErrNoSession) {
+		t.Errorf("at the absolute limit SessionFor = %v, want ErrNoSession", err)
+	}
+}
+
+// A lifetime near the largest accepted duration still yields a positive,
+// rounded-up cookie Max-Age rather than overflowing.
+func TestSessionCookieMaxAgeNearLargestMax(t *testing.T) {
+	t.Parallel()
+	largest, err := time.ParseDuration("2562047h47m16.854s")
+	if err != nil {
+		t.Fatal(err)
+	}
+	h := newSessionHarness(t)
+	h.sessions.max = largest
+	_, cookie := h.signIn(t)
+	if want := 9223372037; cookie.MaxAge != want {
+		t.Errorf("session cookie MaxAge = %d, want %d", cookie.MaxAge, want)
+	}
+}
+
+// A lifetime shortened by configuration applies to existing sessions even
+// though their stored expires_at is later.
+func TestSessionLifetimeChecksUseCurrentConfig(t *testing.T) {
+	t.Parallel()
+	h := newSessionHarness(t)
+	_, cookie := h.signIn(t)
+	h.sessions.idle = 24 * time.Hour
+	h.advance(24 * time.Hour)
+	if _, err := h.use(cookie); !errors.Is(err, ErrNoSession) {
+		t.Errorf("past the shortened idle SessionFor = %v, want ErrNoSession", err)
+	}
+
+	_, cookie = h.signIn(t)
+	h.sessions.idle, h.sessions.max = 24*time.Hour, 48*time.Hour
+	for range 3 {
+		h.advance(12 * time.Hour)
+		if _, err := h.use(cookie); err != nil {
+			t.Fatalf("SessionFor = %v, want the session", err)
+		}
+	}
+	h.advance(12 * time.Hour)
+	if _, err := h.use(cookie); !errors.Is(err, ErrNoSession) {
+		t.Errorf("past the shortened max SessionFor = %v, want ErrNoSession", err)
+	}
+
+	// Used recently and with expires_at still ahead, but older than a max
+	// shortened after that use: only the absolute check ends it.
+	h.sessions.idle, h.sessions.max = testIdle, testMax
+	_, cookie = h.signIn(t)
+	h.advance(10 * 24 * time.Hour)
+	if _, err := h.use(cookie); err != nil {
+		t.Fatalf("SessionFor = %v, want the session", err)
+	}
+	h.sessions.max = 10 * 24 * time.Hour
+	h.advance(time.Hour)
+	if _, err := h.use(cookie); !errors.Is(err, ErrNoSession) {
+		t.Errorf("past a max shortened after the last use SessionFor = %v, want ErrNoSession", err)
+	}
+}
+
+func TestSessionForRejectsBadCookies(t *testing.T) {
+	t.Parallel()
+	h := newSessionHarness(t)
+	h.signIn(t)
+	for name, c := range map[string]*http.Cookie{
+		"missing":      nil,
+		"empty":        {Name: SessionCookieName, Value: ""},
+		"not base64":   {Name: SessionCookieName, Value: strings.Repeat("!", 43)},
+		"short":        {Name: SessionCookieName, Value: "AAAA"},
+		"unknown ID":   {Name: SessionCookieName, Value: randomToken()},
+		"other cookie": {Name: "mealquest_session", Value: randomToken()},
+	} {
+		if _, err := h.use(c); !errors.Is(err, ErrNoSession) {
+			t.Errorf("%s: SessionFor = %v, want ErrNoSession", name, err)
+		}
+	}
+	if n := len(h.rows(t)); n != 1 {
+		t.Errorf("sessions has %d rows, want the signed-in session only", n)
+	}
+}
+
+func (h *sessionHarness) logout(cookies ...*http.Cookie) *http.Response {
+	req := httptest.NewRequest(http.MethodPost, LogoutPath, nil)
+	for _, c := range cookies {
+		req.AddCookie(c)
+	}
+	rec := httptest.NewRecorder()
+	h.router.ServeHTTP(rec, req)
+	return rec.Result()
+}
+
+func TestLogout(t *testing.T) {
+	t.Parallel()
+	h := newSessionHarness(t)
+	_, cookie := h.signIn(t)
+	_, other := h.signIn(t)
+
+	resp := h.logout(cookie)
+	if resp.StatusCode != http.StatusSeeOther {
+		t.Fatalf("logout status = %d, want 303", resp.StatusCode)
+	}
+	want := h.provider.issuer() + "/end-session/"
+	if got := resp.Header.Get("Location"); got != want || h.auth.EndSessionURL() != want {
+		t.Errorf("logout redirect = %q, EndSessionURL = %q, want %q", got, h.auth.EndSessionURL(), want)
+	}
+	raw := sessionSetCookie(t, resp)
+	assertSessionCookieAttributes(t, raw)
+	if !strings.HasPrefix(raw, SessionCookieName+"=;") || !strings.Contains(raw, "Max-Age=0") {
+		t.Errorf("logout Set-Cookie = %q, want the cookie cleared", raw)
+	}
+
+	rows := h.rows(t)
+	if len(rows) != 1 || rows[0].idHash != sha256Hex(other.Value) {
+		t.Errorf("after logout sessions = %+v, want only the other session", rows)
+	}
+	if _, err := h.use(cookie); !errors.Is(err, ErrNoSession) {
+		t.Errorf("logged-out cookie: SessionFor = %v, want ErrNoSession", err)
+	}
+	if _, err := h.use(other); err != nil {
+		t.Errorf("other session: SessionFor = %v, want it untouched", err)
+	}
+}
+
+func TestLogoutWithoutSession(t *testing.T) {
+	t.Parallel()
+	h := newSessionHarness(t)
+	resp := h.logout()
+	if resp.StatusCode != http.StatusSeeOther || resp.Header.Get("Location") != h.provider.issuer()+"/end-session/" {
+		t.Errorf("logout = %d to %q, want 303 to the end session endpoint", resp.StatusCode, resp.Header.Get("Location"))
+	}
+	assertSessionCookieAttributes(t, sessionSetCookie(t, resp))
+}
+
+func TestLogoutIsPostOnly(t *testing.T) {
+	t.Parallel()
+	h := newSessionHarness(t)
+	_, cookie := h.signIn(t)
+	if resp := h.get(LogoutPath, cookie); resp.StatusCode != http.StatusMethodNotAllowed {
+		t.Errorf("GET %s status = %d, want 405", LogoutPath, resp.StatusCode)
+	}
+	if _, err := h.use(cookie); err != nil {
+		t.Errorf("after GET %s SessionFor = %v, want the session", LogoutPath, err)
+	}
+}
+
+func TestLogoutSessionError(t *testing.T) {
+	t.Parallel()
+	h := newHarness(t)
+	h.sessions.err = errors.New("database down")
+	rec := httptest.NewRecorder()
+	h.router.ServeHTTP(rec, httptest.NewRequest(http.MethodPost, LogoutPath, nil))
+	if rec.Code != http.StatusInternalServerError {
+		t.Errorf("logout status = %d, want 500", rec.Code)
+	}
+}
+
+func TestNewRequiresEndSessionEndpoint(t *testing.T) {
+	t.Parallel()
+	p := newFakeProvider(t)
+	p.discoveryOverrides = map[string]any{"end_session_endpoint": nil}
+	_, err := New(context.Background(), Config{
+		Issuer:        p.issuer(),
+		ClientID:      testClientID,
+		ClientSecret:  testClientSecret,
+		PublicURL:     testPublicURL,
+		SecretKey:     []byte("k"),
+		AllowedGroups: testAllowedGroups,
+	}, &memorySessions{}, slog.New(slog.DiscardHandler))
+	if err == nil || !strings.Contains(err.Error(), "end session endpoint") {
+		t.Errorf("New error = %v, want the missing end session endpoint named", err)
+	}
+}
+
+func TestNewSessionManagerValidates(t *testing.T) {
+	t.Parallel()
+	db := &store.Store{}
+	for _, tc := range []struct {
+		name      string
+		db        *store.Store
+		idle, max time.Duration
+	}{
+		{"nil store", nil, time.Hour, time.Hour},
+		{"zero idle", db, 0, time.Hour},
+		{"negative max", db, time.Hour, -time.Hour},
+		{"max below idle", db, 2 * time.Hour, time.Hour},
+	} {
+		if _, err := NewSessionManager(tc.db, tc.idle, tc.max); err == nil {
+			t.Errorf("%s: NewSessionManager succeeded", tc.name)
+		}
+	}
+}

internal/config/config.go

@@ -11,6 +11,8 @@ import (
 	"strconv"
 	"strings"
 	"time"
+
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/secureurl"
 )
 
 // Environment variable names.
@@ -20,6 +22,21 @@ const (
 	EnvDataDir         = "MEALQUEST_DATA_DIR"
 	EnvShutdownTimeout = "MEALQUEST_SHUTDOWN_TIMEOUT"
 	EnvSecretKeyFile   = "MEALQUEST_SECRET_KEY_FILE"
+
+	EnvOIDCIssuer           = "MEALQUEST_OIDC_ISSUER"
+	EnvOIDCClientID         = "MEALQUEST_OIDC_CLIENT_ID"
+	EnvOIDCClientSecretFile = "MEALQUEST_OIDC_CLIENT_SECRET_FILE"
+	EnvOIDCAllowedGroups    = "MEALQUEST_OIDC_ALLOWED_GROUPS"
+
+	EnvSessionIdle = "MEALQUEST_SESSION_IDLE"
+	EnvSessionMax  = "MEALQUEST_SESSION_MAX"
+)
+
+// Session lifetime defaults (D-004): long enough that the kitchen tablet
+// stays signed in.
+const (
+	DefaultSessionIdle = 720 * time.Hour  // 30 days
+	DefaultSessionMax  = 4320 * time.Hour // 180 days
 )
 
 // Config is the validated service configuration.
@@ -29,6 +46,18 @@ type Config struct {
 	DataDir         string
 	ShutdownTimeout time.Duration
 	SecretKey       Secret
+
+	// OIDCIssuer is the Authentik issuer URL used for discovery.
+	OIDCIssuer       *url.URL
+	OIDCClientID     string
+	OIDCClientSecret Secret
+	// OIDCAllowedGroups lists the groups whose members may sign in.
+	OIDCAllowedGroups []string
+
+	// SessionIdle ends a session left unused this long.
+	SessionIdle time.Duration
+	// SessionMax ends every session this long after sign-in, used or not.
+	SessionMax time.Duration
 }
 
 // PublicOrigin returns the scheme and host of PublicURL, the only parts of it
@@ -47,10 +76,21 @@ func load(lookup func(string) (string, bool)) (Config, error) {
 	r := reader{lookup: lookup}
 	cfg := Config{
 		HTTPAddr:        r.listenAddr(EnvHTTPAddr),
-		PublicURL:       r.httpURL(EnvPublicURL),
+		PublicURL:       r.secureURL(EnvPublicURL),
 		DataDir:         r.dir(EnvDataDir),
 		ShutdownTimeout: r.duration(EnvShutdownTimeout),
 		SecretKey:       r.secretFile(EnvSecretKeyFile),
+
+		OIDCIssuer:        r.secureURL(EnvOIDCIssuer),
+		OIDCClientID:      r.str(EnvOIDCClientID),
+		OIDCClientSecret:  r.secretFile(EnvOIDCClientSecretFile),
+		OIDCAllowedGroups: r.list(EnvOIDCAllowedGroups),
+
+		SessionIdle: r.sessionDuration(EnvSessionIdle, DefaultSessionIdle),
+		SessionMax:  r.sessionDuration(EnvSessionMax, DefaultSessionMax),
+	}
+	if cfg.SessionIdle > 0 && cfg.SessionMax > 0 && cfg.SessionMax < cfg.SessionIdle {
+		r.fail(EnvSessionMax, "must be at least %s (%s)", EnvSessionIdle, cfg.SessionIdle)
 	}
 	if len(r.problems) > 0 {
 		return Config{}, &Error{Problems: r.problems}
@@ -114,6 +154,29 @@ func (r *reader) required(name string) (string, bool) {
 	return v, true
 }
 
+func (r *reader) str(name string) string {
+	v, _ := r.required(name)
+	return v
+}
+
+// list parses a comma-separated list. Every entry must be non-empty after
+// trimming spaces.
+func (r *reader) list(name string) []string {
+	v, ok := r.required(name)
+	if !ok {
+		return nil
+	}
+	items := strings.Split(v, ",")
+	for i, item := range items {
+		items[i] = strings.TrimSpace(item)
+		if items[i] == "" {
+			r.fail(name, "empty entry in comma-separated list %q", v)
+			return nil
+		}
+	}
+	return items
+}
+
 func (r *reader) listenAddr(name string) string {
 	v, ok := r.required(name)
 	if !ok {
@@ -155,15 +218,21 @@ func validHostname(h string) bool {
 	return true
 }
 
-func (r *reader) httpURL(name string) *url.URL {
+// secureURL reads an absolute URL that must pass secureurl.Check: https://,
+// or http:// to a loopback host only.
+func (r *reader) secureURL(name string) *url.URL {
 	v, ok := r.required(name)
 	if !ok {
 		return nil
 	}
 	// The value is never echoed: it may carry credentials.
 	u, err := url.Parse(v)
-	if err != nil || (u.Scheme != "http" && u.Scheme != "https") || u.Hostname() == "" {
-		r.fail(name, "invalid URL (want absolute http:// or https:// URL)")
+	if err != nil {
+		r.fail(name, "invalid URL (want absolute https:// URL)")
+		return nil
+	}
+	if err := secureurl.Check(u); err != nil {
+		r.fail(name, "invalid URL: %v", err)
 		return nil
 	}
 	if u.User != nil {
@@ -195,6 +264,32 @@ func (r *reader) duration(name string) time.Duration {
 	if !ok {
 		return 0
 	}
+	return r.parseDuration(name, v)
+}
+
+// optionalDuration returns def when name is unset. A set value, even an empty
+// one, must be a valid positive duration.
+func (r *reader) optionalDuration(name string, def time.Duration) time.Duration {
+	v, ok := r.lookup(name)
+	if !ok {
+		return def
+	}
+	return r.parseDuration(name, v)
+}
+
+// sessionDuration is optionalDuration restricted to whole milliseconds:
+// session expiry is stored as a store.Timestamp, which keeps millisecond
+// precision, so a finer duration could not be honoured.
+func (r *reader) sessionDuration(name string, def time.Duration) time.Duration {
+	d := r.optionalDuration(name, def)
+	if d%time.Millisecond != 0 {
+		r.fail(name, "duration must be a whole number of milliseconds, got %s", d)
+		return 0
+	}
+	return d
+}
+
+func (r *reader) parseDuration(name, v string) time.Duration {
 	d, err := time.ParseDuration(v)
 	if err != nil {
 		r.fail(name, "invalid duration %q (want e.g. 10s, 1m)", v)

internal/config/config_test.go

@@ -6,6 +6,7 @@ import (
 	"net/url"
 	"os"
 	"path/filepath"
+	"reflect"
 	"slices"
 	"strings"
 	"testing"
@@ -21,6 +22,10 @@ func TestLoad(t *testing.T) {
 		t.Fatal(err)
 	}
 	unreadablePath := filepath.Join(dir, "missing_secret")
+	clientSecretPath := filepath.Join(dir, "oidc_client_secret")
+	if err := os.WriteFile(clientSecretPath, []byte("client-s3cret\n"), 0o600); err != nil {
+		t.Fatal(err)
+	}
 	emptyPath := filepath.Join(dir, "empty_secret")
 	if err := os.WriteFile(emptyPath, []byte("\n"), 0o600); err != nil {
 		t.Fatal(err)
@@ -33,6 +38,11 @@ func TestLoad(t *testing.T) {
 			EnvDataDir:         dir,
 			EnvShutdownTimeout: "15s",
 			EnvSecretKeyFile:   secretPath,
+
+			EnvOIDCIssuer:           "https://auth.example.com/application/o/mealquest/",
+			EnvOIDCClientID:         "mealquest",
+			EnvOIDCClientSecretFile: clientSecretPath,
+			EnvOIDCAllowedGroups:    "mealquest-admin",
 		}
 	}
 	with := func(changes map[string]string, unset ...string) map[string]string {
@@ -70,6 +80,7 @@ func TestLoad(t *testing.T) {
 			env:  map[string]string{},
 			badVars: []string{
 				EnvHTTPAddr, EnvPublicURL, EnvDataDir, EnvShutdownTimeout, EnvSecretKeyFile,
+				EnvOIDCIssuer, EnvOIDCClientID, EnvOIDCClientSecretFile, EnvOIDCAllowedGroups,
 			},
 		},
 		{
@@ -139,6 +150,24 @@ func TestLoad(t *testing.T) {
 			env:     with(map[string]string{EnvPublicURL: "http://:8080"}),
 			badVars: []string{EnvPublicURL},
 		},
+		{
+			name:    "plain HTTP public URL on a remote host",
+			env:     with(map[string]string{EnvPublicURL: "http://meals.example.com"}),
+			badVars: []string{EnvPublicURL},
+		},
+		{
+			name:    "plain HTTP public URL on a non-loopback IP",
+			env:     with(map[string]string{EnvPublicURL: "http://192.168.1.20:8080"}),
+			badVars: []string{EnvPublicURL},
+		},
+		{
+			name: "plain HTTP public URL on 127.0.0.1",
+			env:  with(map[string]string{EnvPublicURL: "http://127.0.0.1:8080"}),
+		},
+		{
+			name: "plain HTTP public URL on [::1]",
+			env:  with(map[string]string{EnvPublicURL: "http://[::1]:8080"}),
+		},
 		{
 			name:    "relative public URL",
 			env:     with(map[string]string{EnvPublicURL: "meals.example.com"}),
@@ -169,6 +198,101 @@ func TestLoad(t *testing.T) {
 			env:     with(map[string]string{"MEALQUEST_SECRET_KEY": "inline"}),
 			badVars: []string{"MEALQUEST_SECRET_KEY"},
 		},
+		{
+			name:    "inline OIDC client secret rejected",
+			env:     with(map[string]string{"MEALQUEST_OIDC_CLIENT_SECRET": "inline"}),
+			badVars: []string{"MEALQUEST_OIDC_CLIENT_SECRET"},
+		},
+		{
+			name:    "unreadable OIDC client secret file",
+			env:     with(map[string]string{EnvOIDCClientSecretFile: unreadablePath}),
+			badVars: []string{EnvOIDCClientSecretFile},
+		},
+		{
+			name:    "relative OIDC issuer",
+			env:     with(map[string]string{EnvOIDCIssuer: "auth.example.com"}),
+			badVars: []string{EnvOIDCIssuer},
+		},
+		{
+			name:    "non-http OIDC issuer",
+			env:     with(map[string]string{EnvOIDCIssuer: "ftp://auth.example.com"}),
+			badVars: []string{EnvOIDCIssuer},
+		},
+		{
+			name:    "plain HTTP OIDC issuer on a remote host",
+			env:     with(map[string]string{EnvOIDCIssuer: "http://auth.example.com/application/o/mealquest/"}),
+			badVars: []string{EnvOIDCIssuer},
+		},
+		{
+			name: "plain HTTP OIDC issuer on localhost",
+			env:  with(map[string]string{EnvOIDCIssuer: "http://localhost:9000/application/o/mealquest/"}),
+		},
+		{
+			name: "several allowed groups",
+			env:  with(map[string]string{EnvOIDCAllowedGroups: "mealquest-admin, family"}),
+		},
+		{
+			name:    "empty allowed group entry",
+			env:     with(map[string]string{EnvOIDCAllowedGroups: "mealquest-admin,,family"}),
+			badVars: []string{EnvOIDCAllowedGroups},
+		},
+		{
+			name:    "trailing comma in allowed groups",
+			env:     with(map[string]string{EnvOIDCAllowedGroups: "mealquest-admin,"}),
+			badVars: []string{EnvOIDCAllowedGroups},
+		},
+		{
+			name:    "blank OIDC client ID",
+			env:     with(map[string]string{EnvOIDCClientID: "  "}),
+			badVars: []string{EnvOIDCClientID},
+		},
+		{
+			name: "session lifetimes set",
+			env:  with(map[string]string{EnvSessionIdle: "24h", EnvSessionMax: "48h"}),
+		},
+		{
+			name: "session max equal to idle",
+			env:  with(map[string]string{EnvSessionIdle: "24h", EnvSessionMax: "24h"}),
+		},
+		{
+			name:    "invalid session idle",
+			env:     with(map[string]string{EnvSessionIdle: "a month"}),
+			badVars: []string{EnvSessionIdle},
+		},
+		{
+			name:    "empty session idle",
+			env:     with(map[string]string{EnvSessionIdle: ""}),
+			badVars: []string{EnvSessionIdle},
+		},
+		{
+			name:    "non-positive session max",
+			env:     with(map[string]string{EnvSessionMax: "-1h"}),
+			badVars: []string{EnvSessionMax},
+		},
+		{
+			name: "whole-millisecond session lifetimes",
+			env:  with(map[string]string{EnvSessionIdle: "1ms", EnvSessionMax: "2ms"}),
+		},
+		{
+			name:    "sub-millisecond session idle",
+			env:     with(map[string]string{EnvSessionIdle: "1500us", EnvSessionMax: "2ms"}),
+			badVars: []string{EnvSessionIdle},
+		},
+		{
+			name:    "sub-millisecond session max",
+			env:     with(map[string]string{EnvSessionIdle: "1ms", EnvSessionMax: "1ms500us"}),
+			badVars: []string{EnvSessionMax},
+		},
+		{
+			name:    "session max below idle",
+			env:     with(map[string]string{EnvSessionIdle: "48h", EnvSessionMax: "24h"}),
+			badVars: []string{EnvSessionMax},
+		},
+		{
+			name:    "session max below default idle",
+			env:     with(map[string]string{EnvSessionMax: "719h"}),
+			badVars: []string{EnvSessionMax},
+		},
 		{
 			name: "several invalid values are all named",
 			env: with(map[string]string{
@@ -211,7 +335,7 @@ func TestLoad(t *testing.T) {
 					t.Errorf("error message %q does not name %s", err.Error(), v)
 				}
 			}
-			if cfg != (Config{}) {
+			if !reflect.ValueOf(cfg).IsZero() {
 				t.Errorf("load() returned non-zero Config alongside error: %+v", cfg)
 			}
 		})
@@ -226,12 +350,21 @@ func TestLoadValues(t *testing.T) {
 	if err := os.WriteFile(secretPath, []byte("s3cret-value\r\n"), 0o600); err != nil {
 		t.Fatal(err)
 	}
+	clientSecretPath := filepath.Join(dir, "oidc_client_secret")
+	if err := os.WriteFile(clientSecretPath, []byte("client-s3cret\n"), 0o600); err != nil {
+		t.Fatal(err)
+	}
 	env := map[string]string{
 		EnvHTTPAddr:        "127.0.0.1:9000",
 		EnvPublicURL:       "http://localhost:9000",
 		EnvDataDir:         dir,
 		EnvShutdownTimeout: "1m30s",
 		EnvSecretKeyFile:   secretPath,
+
+		EnvOIDCIssuer:           "https://auth.example.com/application/o/mealquest/",
+		EnvOIDCClientID:         "mealquest",
+		EnvOIDCClientSecretFile: clientSecretPath,
+		EnvOIDCAllowedGroups:    " mealquest-admin ,family",
 	}
 	cfg, err := load(func(k string) (string, bool) { v, ok := env[k]; return v, ok })
 	if err != nil {
@@ -253,6 +386,31 @@ func TestLoadValues(t *testing.T) {
 	if cfg.SecretKey.Reveal() != "s3cret-value" {
 		t.Errorf("SecretKey.Reveal() = %q, want trailing newline trimmed", cfg.SecretKey.Reveal())
 	}
+	if got, want := cfg.OIDCIssuer.String(), "https://auth.example.com/application/o/mealquest/"; got != want {
+		t.Errorf("OIDCIssuer = %q, want %q", got, want)
+	}
+	if cfg.OIDCClientID != "mealquest" {
+		t.Errorf("OIDCClientID = %q", cfg.OIDCClientID)
+	}
+	if cfg.OIDCClientSecret.Reveal() != "client-s3cret" {
+		t.Errorf("OIDCClientSecret.Reveal() = %q", cfg.OIDCClientSecret.Reveal())
+	}
+	if want := []string{"mealquest-admin", "family"}; !slices.Equal(cfg.OIDCAllowedGroups, want) {
+		t.Errorf("OIDCAllowedGroups = %q, want %q", cfg.OIDCAllowedGroups, want)
+	}
+	if cfg.SessionIdle != 720*time.Hour || cfg.SessionMax != 4320*time.Hour {
+		t.Errorf("SessionIdle, SessionMax = %v, %v, want defaults 720h, 4320h", cfg.SessionIdle, cfg.SessionMax)
+	}
+
+	env[EnvSessionIdle] = "12h"
+	env[EnvSessionMax] = "36h"
+	cfg, err = load(func(k string) (string, bool) { v, ok := env[k]; return v, ok })
+	if err != nil {
+		t.Fatalf("load() error = %v", err)
+	}
+	if cfg.SessionIdle != 12*time.Hour || cfg.SessionMax != 36*time.Hour {
+		t.Errorf("SessionIdle, SessionMax = %v, %v, want 12h, 36h", cfg.SessionIdle, cfg.SessionMax)
+	}
 }
 
 func TestSecretRedacted(t *testing.T) {
@@ -260,7 +418,7 @@ func TestSecretRedacted(t *testing.T) {
 
 	s := Secret{value: "s3cret-value"}
 	for _, format := range []string{"%v", "%s", "%+v", "%#v"} {
-		cfg := Config{SecretKey: s}
+		cfg := Config{SecretKey: s, OIDCClientSecret: s}
 		for _, out := range []string{fmt.Sprintf(format, s), fmt.Sprintf(format, cfg)} {
 			if strings.Contains(out, "s3cret-value") {
 				t.Errorf("format %s leaked secret: %s", format, out)

internal/db/db.go

@@ -0,0 +1,31 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+
+package db
+
+import (
+	"context"
+	"database/sql"
+)
+
+type DBTX interface {
+	ExecContext(context.Context, string, ...interface{}) (sql.Result, error)
+	PrepareContext(context.Context, string) (*sql.Stmt, error)
+	QueryContext(context.Context, string, ...interface{}) (*sql.Rows, error)
+	QueryRowContext(context.Context, string, ...interface{}) *sql.Row
+}
+
+func New(db DBTX) *Queries {
+	return &Queries{db: db}
+}
+
+type Queries struct {
+	db DBTX
+}
+
+func (q *Queries) WithTx(tx *sql.Tx) *Queries {
+	return &Queries{
+		db: tx,
+	}
+}

internal/db/db_test.go

@@ -0,0 +1,564 @@
+package db_test
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"reflect"
+	"testing"
+
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/db"
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/store"
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/migrations"
+)
+
+const (
+	created = "2026-10-03T12:00:00.000Z"
+	updated = "2026-10-04T12:00:00.000Z"
+)
+
+// openQueries returns queries on the writer of a freshly migrated database
+// in a temp directory.
+func openQueries(t *testing.T) (*store.Store, *db.Queries) {
+	t.Helper()
+	ctx := context.Background()
+	s, err := store.Open(ctx, t.TempDir())
+	if err != nil {
+		t.Fatalf("Open: %v", err)
+	}
+	t.Cleanup(func() {
+		if err := s.Close(); err != nil {
+			t.Errorf("Close: %v", err)
+		}
+	})
+	if err := store.Migrate(ctx, s.Writer, migrations.FS); err != nil {
+		t.Fatalf("Migrate: %v", err)
+	}
+	return s, db.New(s.Writer)
+}
+
+func str(s string) sql.NullString { return sql.NullString{String: s, Valid: true} }
+func num(n int64) sql.NullInt64   { return sql.NullInt64{Int64: n, Valid: true} }
+
+func mustNoRows(t *testing.T, what string, err error) {
+	t.Helper()
+	if !errors.Is(err, sql.ErrNoRows) {
+		t.Fatalf("%s: got %v, want sql.ErrNoRows", what, err)
+	}
+}
+
+func createPhoto(t *testing.T, q *db.Queries, sha string) db.Photo {
+	t.Helper()
+	p, err := q.CreatePhoto(context.Background(), db.CreatePhotoParams{
+		ID:        store.NewID(),
+		SourceUrl: "https://example.com/" + sha + ".jpg",
+		LocalPath: "photos/" + sha + ".jpg",
+		Width:     800,
+		Height:    600,
+		Sha256:    sha,
+		FetchedAt: created,
+		CreatedAt: created,
+		UpdatedAt: created,
+	})
+	if err != nil {
+		t.Fatalf("CreatePhoto: %v", err)
+	}
+	return p
+}
+
+func upsertRecipe(t *testing.T, q *db.Queries, id, url, title, at string) db.Recipe {
+	t.Helper()
+	r, err := q.UpsertRecipe(context.Background(), db.UpsertRecipeParams{
+		ID:           id,
+		SourceUrl:    url,
+		SiteName:     str("Example"),
+		Title:        title,
+		TotalMinutes: num(30),
+		PrepMinutes:  num(10),
+		CookMinutes:  num(20),
+		Yield:        str("4 servings"),
+		RawJsonld:    `{"@type":"Recipe"}`,
+		FetchedAt:    at,
+		CreatedAt:    at,
+		UpdatedAt:    at,
+	})
+	if err != nil {
+		t.Fatalf("UpsertRecipe: %v", err)
+	}
+	return r
+}
+
+func TestDinners(t *testing.T) {
+	ctx := context.Background()
+	_, q := openQueries(t)
+	recipe := upsertRecipe(t, q, store.NewID(), "https://example.com/tacos", "Tacos", created)
+	photo := createPhoto(t, q, "aa11")
+
+	create := db.CreateDinnerParams{
+		ID:              store.NewID(),
+		Name:            "Taco Tuesday",
+		NormalizedName:  "taco tuesday",
+		Status:          "regular",
+		Origin:          "regular",
+		Method:          str("stovetop"),
+		MinutesTotal:    num(30),
+		Difficulty:      str("easy"),
+		Cuisine:         str("Mexican"),
+		IsFavorite:      0,
+		RecipeID:        str(recipe.ID),
+		PhotoID:         str(photo.ID),
+		GroundingStatus: "grounded",
+		UpdatedBy:       str("alex@example.com"),
+		CreatedAt:       created,
+		UpdatedAt:       created,
+	}
+	want := db.Dinner(create)
+	got, err := q.CreateDinner(ctx, create)
+	if err != nil {
+		t.Fatalf("CreateDinner: %v", err)
+	}
+	if got != want {
+		t.Fatalf("CreateDinner returned %+v, want %+v", got, want)
+	}
+	if got, err = q.GetDinner(ctx, create.ID); err != nil || got != want {
+		t.Fatalf("GetDinner = %+v, %v; want %+v", got, err, want)
+	}
+	_, err = q.GetDinner(ctx, "missing")
+	mustNoRows(t, "GetDinner missing", err)
+
+	// Second dinner sorts before the first by normalized name, in a
+	// different status so the status filter is exercised.
+	other, err := q.CreateDinner(ctx, db.CreateDinnerParams{
+		ID:              store.NewID(),
+		Name:            "Apple Pork Chops",
+		NormalizedName:  "apple pork chops",
+		Status:          "quest_log",
+		Origin:          "side_quest",
+		GroundingStatus: "pending",
+		CreatedAt:       created,
+		UpdatedAt:       created,
+	})
+	if err != nil {
+		t.Fatalf("CreateDinner other: %v", err)
+	}
+	third, err := q.CreateDinner(ctx, db.CreateDinnerParams{
+		ID:              store.NewID(),
+		Name:            "Beef Stew",
+		NormalizedName:  "beef stew",
+		Status:          "regular",
+		Origin:          "manual",
+		GroundingStatus: "manual",
+		CreatedAt:       created,
+		UpdatedAt:       created,
+	})
+	if err != nil {
+		t.Fatalf("CreateDinner third: %v", err)
+	}
+	listIDs := func(status string) []string {
+		t.Helper()
+		ds, err := q.ListDinnersByStatus(ctx, status)
+		if err != nil {
+			t.Fatalf("ListDinnersByStatus(%s): %v", status, err)
+		}
+		ids := []string{}
+		for _, d := range ds {
+			ids = append(ids, d.ID)
+		}
+		return ids
+	}
+	assertIDs(t, "regular", listIDs("regular"), third.ID, create.ID)
+	assertIDs(t, "quest_log", listIDs("quest_log"), other.ID)
+	assertIDs(t, "tried", listIDs("tried"))
+
+	update := db.UpdateDinnerParams{
+		ID:              create.ID,
+		Name:            "Fish Tacos",
+		NormalizedName:  "fish tacos",
+		Status:          "tried",
+		Origin:          "side_quest",
+		Method:          str("grill"),
+		MinutesTotal:    num(25),
+		Difficulty:      str("medium"),
+		Cuisine:         sql.NullString{},
+		RecipeID:        sql.NullString{},
+		PhotoID:         str(photo.ID),
+		GroundingStatus: "failed",
+		UpdatedBy:       str("sam@example.com"),
+		UpdatedAt:       updated,
+	}
+	got, err = q.UpdateDinner(ctx, update)
+	if err != nil {
+		t.Fatalf("UpdateDinner: %v", err)
+	}
+	want = db.Dinner{
+		ID: create.ID, Name: update.Name, NormalizedName: update.NormalizedName,
+		Status: update.Status, Origin: update.Origin, Method: update.Method,
+		MinutesTotal: update.MinutesTotal, Difficulty: update.Difficulty,
+		Cuisine: update.Cuisine, IsFavorite: 0, RecipeID: update.RecipeID,
+		PhotoID: update.PhotoID, GroundingStatus: update.GroundingStatus,
+		UpdatedBy: update.UpdatedBy, CreatedAt: created, UpdatedAt: updated,
+	}
+	if got != want {
+		t.Fatalf("UpdateDinner returned %+v, want %+v", got, want)
+	}
+	if got, err = q.GetDinner(ctx, create.ID); err != nil || got != want {
+		t.Fatalf("GetDinner after update = %+v, %v; want %+v", got, err, want)
+	}
+	update.ID = "missing"
+	_, err = q.UpdateDinner(ctx, update)
+	mustNoRows(t, "UpdateDinner missing", err)
+
+	got, err = q.SetDinnerFavorite(ctx, db.SetDinnerFavoriteParams{
+		ID: create.ID, IsFavorite: 1, UpdatedBy: str("alex@example.com"), UpdatedAt: updated,
+	})
+	if err != nil {
+		t.Fatalf("SetDinnerFavorite: %v", err)
+	}
+	want.IsFavorite, want.UpdatedBy = 1, str("alex@example.com")
+	if got != want {
+		t.Fatalf("SetDinnerFavorite returned %+v, want %+v", got, want)
+	}
+	got, err = q.SetDinnerFavorite(ctx, db.SetDinnerFavoriteParams{
+		ID: create.ID, IsFavorite: 0, UpdatedBy: str("sam@example.com"), UpdatedAt: updated,
+	})
+	if err != nil || got.IsFavorite != 0 || got.UpdatedBy != str("sam@example.com") {
+		t.Fatalf("SetDinnerFavorite off = %+v, %v", got, err)
+	}
+	_, err = q.SetDinnerFavorite(ctx, db.SetDinnerFavoriteParams{ID: "missing", IsFavorite: 1, UpdatedAt: updated})
+	mustNoRows(t, "SetDinnerFavorite missing", err)
+
+	const archivedAt = "2026-10-05T12:00:00.000Z"
+	got, err = q.ArchiveDinner(ctx, db.ArchiveDinnerParams{
+		ID: create.ID, UpdatedBy: str("alex@example.com"), UpdatedAt: archivedAt,
+	})
+	if err != nil {
+		t.Fatalf("ArchiveDinner: %v", err)
+	}
+	want.IsFavorite, want.Status, want.UpdatedBy, want.UpdatedAt = 0, "archived", str("alex@example.com"), archivedAt
+	if got != want {
+		t.Fatalf("ArchiveDinner returned %+v, want %+v", got, want)
+	}
+	assertIDs(t, "archived", listIDs("archived"), create.ID)
+	assertIDs(t, "tried after archive", listIDs("tried"))
+	_, err = q.ArchiveDinner(ctx, db.ArchiveDinnerParams{ID: "missing", UpdatedAt: archivedAt})
+	mustNoRows(t, "ArchiveDinner missing", err)
+}
+
+func assertIDs(t *testing.T, what string, got []string, want ...string) {
+	t.Helper()
+	if len(got) != len(want) {
+		t.Fatalf("%s: got ids %v, want %v", what, got, want)
+	}
+	for i := range got {
+		if got[i] != want[i] {
+			t.Fatalf("%s: got ids %v, want %v", what, got, want)
+		}
+	}
+}
+
+func TestRecipeUpsertWithIngredientsAndSteps(t *testing.T) {
+	ctx := context.Background()
+	s, q := openQueries(t)
+	const url = "https://example.com/chili"
+
+	_, err := q.GetRecipeBySourceURL(ctx, url)
+	mustNoRows(t, "GetRecipeBySourceURL before insert", err)
+
+	// saveRecipe is how a caller stores a fetched recipe: upsert by
+	// source_url, then replace the children, all in one transaction.
+	saveRecipe := func(title, at string, ingredients, steps []string) db.Recipe {
+		t.Helper()
+		var r db.Recipe
+		err := s.WithTx(ctx, func(tx *sql.Tx) error {
+			qtx := q.WithTx(tx)
+			var err error
+			r, err = qtx.UpsertRecipe(ctx, db.UpsertRecipeParams{
+				ID: store.NewID(), SourceUrl: url, SiteName: str("Example"), Title: title,
+				TotalMinutes: num(60), RawJsonld: `{"name":"` + title + `"}`,
+				FetchedAt: at, CreatedAt: at, UpdatedAt: at,
+			})
+			if err != nil {
+				return err
+			}
+			if err := qtx.DeleteRecipeIngredients(ctx, r.ID); err != nil {
+				return err
+			}
+			if err := qtx.DeleteRecipeSteps(ctx, r.ID); err != nil {
+				return err
+			}
+			for i, text := range ingredients {
+				if err := qtx.CreateRecipeIngredient(ctx, db.CreateRecipeIngredientParams{
+					ID: store.NewID(), RecipeID: r.ID, Position: int64(i), RawText: text,
+					Name: str(text), Qty: str("1"), Unit: str("cup"), Note: sql.NullString{},
+					CreatedAt: at, UpdatedAt: at,
+				}); err != nil {
+					return err
+				}
+			}
+			for i, text := range steps {
+				if err := qtx.CreateRecipeStep(ctx, db.CreateRecipeStepParams{
+					ID: store.NewID(), RecipeID: r.ID, Position: int64(i), Text: text,
+					CreatedAt: at, UpdatedAt: at,
+				}); err != nil {
+					return err
+				}
+			}
+			return nil
+		})
+		if err != nil {
+			t.Fatalf("save recipe %q: %v", title, err)
+		}
+		return r
+	}
+	assertRecipe := func(id, title, createdAt, updatedAt string, ingredients, steps []string) {
+		t.Helper()
+		r, err := q.GetRecipe(ctx, id)
+		if err != nil {
+			t.Fatalf("GetRecipe: %v", err)
+		}
+		if r.Title != title || r.SourceUrl != url || r.CreatedAt != createdAt || r.UpdatedAt != updatedAt || r.FetchedAt != updatedAt {
+			t.Fatalf("GetRecipe = %+v; want title %q, created %s, updated %s", r, title, createdAt, updatedAt)
+		}
+		byURL, err := q.GetRecipeBySourceURL(ctx, url)
+		if err != nil || byURL != r {
+			t.Fatalf("GetRecipeBySourceURL = %+v, %v; want %+v", byURL, err, r)
+		}
+		ings, err := q.ListRecipeIngredients(ctx, id)
+		if err != nil {
+			t.Fatalf("ListRecipeIngredients: %v", err)
+		}
+		gotIngs := []string{}
+		for i, ing := range ings {
+			if ing.RecipeID != id || ing.Position != int64(i) || ing.Name != str(ing.RawText) {
+				t.Fatalf("ingredient %d = %+v", i, ing)
+			}
+			gotIngs = append(gotIngs, ing.RawText)
+		}
+		assertIDs(t, "ingredients", gotIngs, ingredients...)
+		sts, err := q.ListRecipeSteps(ctx, id)
+		if err != nil {
+			t.Fatalf("ListRecipeSteps: %v", err)
+		}
+		gotSteps := []string{}
+		for i, st := range sts {
+			if st.RecipeID != id || st.Position != int64(i) {
+				t.Fatalf("step %d = %+v", i, st)
+			}
+			gotSteps = append(gotSteps, st.Text)
+		}
+		assertIDs(t, "steps", gotSteps, steps...)
+	}
+
+	first := saveRecipe("Chili", created, []string{"beans", "beef", "tomatoes"}, []string{"Brown the beef.", "Simmer everything."})
+	assertRecipe(first.ID, "Chili", created, created, []string{"beans", "beef", "tomatoes"}, []string{"Brown the beef.", "Simmer everything."})
+
+	// Re-fetching the same URL keeps the id and created_at and replaces the
+	// fields and children.
+	second := saveRecipe("White Chili", updated, []string{"chicken", "white beans"}, []string{"Simmer."})
+	if second.ID != first.ID {
+		t.Fatalf("upsert changed id: %s -> %s", first.ID, second.ID)
+	}
+	assertRecipe(first.ID, "White Chili", created, updated, []string{"chicken", "white beans"}, []string{"Simmer."})
+
+	// A different recipe's children are not listed.
+	upsertRecipe(t, q, store.NewID(), "https://example.com/other", "Other", created)
+	var n int
+	if err := s.Reader.QueryRowContext(ctx, "SELECT count(*) FROM recipes").Scan(&n); err != nil || n != 2 {
+		t.Fatalf("recipes count = %d, %v; want 2", n, err)
+	}
+	_, err = q.GetRecipe(ctx, "missing")
+	mustNoRows(t, "GetRecipe missing", err)
+}
+
+func TestPhotos(t *testing.T) {
+	ctx := context.Background()
+	_, q := openQueries(t)
+
+	_, err := q.GetPhotoBySHA256(ctx, "bb22")
+	mustNoRows(t, "GetPhotoBySHA256 before insert", err)
+
+	first := createPhoto(t, q, "bb22")
+	createPhoto(t, q, "cc33")
+	if first.Sha256 != "bb22" || first.Width != 800 || first.Height != 600 || first.CreatedAt != created {
+		t.Fatalf("CreatePhoto returned %+v", first)
+	}
+	got, err := q.GetPhotoBySHA256(ctx, "bb22")
+	if err != nil || got != first {
+		t.Fatalf("GetPhotoBySHA256 = %+v, %v; want %+v", got, err, first)
+	}
+
+	// sha256 is not unique in the schema; the earliest photo is returned.
+	createPhoto(t, q, "bb22")
+	if got, err = q.GetPhotoBySHA256(ctx, "bb22"); err != nil || got != first {
+		t.Fatalf("GetPhotoBySHA256 with duplicate = %+v, %v; want %+v", got, err, first)
+	}
+}
+
+func TestHouseholdSettings(t *testing.T) {
+	ctx := context.Background()
+	_, q := openQueries(t)
+	_, err := q.GetHouseholdSettings(ctx)
+	mustNoRows(t, "GetHouseholdSettings before upsert", err)
+
+	p := db.UpsertHouseholdSettingsParams{
+		Timezone: "America/New_York", DinnerTime: "17:30", ReminderTime: "16:30",
+		ReviewTime: "09:00", PlanDraftDow: 5, PlanDraftTime: "09:00",
+		SuggestionsDow: 0, SuggestionsTime: "08:00", ChatAutosendDow: 6,
+		ChatAutosendTime: "08:00", CreatedAt: created, UpdatedAt: created,
+	}
+	want := db.HouseholdSetting{
+		ID: 1, Timezone: p.Timezone, DinnerTime: p.DinnerTime, ReminderTime: p.ReminderTime,
+		ReviewTime: p.ReviewTime, PlanDraftDow: p.PlanDraftDow, PlanDraftTime: p.PlanDraftTime,
+		SuggestionsDow: p.SuggestionsDow, SuggestionsTime: p.SuggestionsTime,
+		ChatAutosendDow: p.ChatAutosendDow, ChatAutosendTime: p.ChatAutosendTime,
+		CreatedAt: created, UpdatedAt: created,
+	}
+	assertSettings(t, "insert", q.UpsertHouseholdSettings, q.GetHouseholdSettings, p, want)
+
+	p = db.UpsertHouseholdSettingsParams{
+		Timezone: "America/Chicago", DinnerTime: "18:00", ReminderTime: "17:00",
+		ReviewTime: "10:00", PlanDraftDow: 4, PlanDraftTime: "20:00",
+		SuggestionsDow: 1, SuggestionsTime: "07:00", ChatAutosendDow: 0,
+		ChatAutosendTime: "09:30", OnboardingCompletedAt: str(updated),
+		UpdatesSeenAt: str(updated), CreatedAt: updated, UpdatedAt: updated,
+	}
+	want = db.HouseholdSetting{
+		ID: 1, Timezone: p.Timezone, DinnerTime: p.DinnerTime, ReminderTime: p.ReminderTime,
+		ReviewTime: p.ReviewTime, PlanDraftDow: p.PlanDraftDow, PlanDraftTime: p.PlanDraftTime,
+		SuggestionsDow: p.SuggestionsDow, SuggestionsTime: p.SuggestionsTime,
+		ChatAutosendDow: p.ChatAutosendDow, ChatAutosendTime: p.ChatAutosendTime,
+		OnboardingCompletedAt: p.OnboardingCompletedAt, UpdatesSeenAt: p.UpdatesSeenAt,
+		CreatedAt: created, UpdatedAt: updated,
+	}
+	assertSettings(t, "update", q.UpsertHouseholdSettings, q.GetHouseholdSettings, p, want)
+}
+
+func TestAISettings(t *testing.T) {
+	ctx := context.Background()
+	_, q := openQueries(t)
+	_, err := q.GetAISettings(ctx)
+	mustNoRows(t, "GetAISettings before upsert", err)
+
+	p := db.UpsertAISettingsParams{
+		Provider: "ollama", BaseUrl: "http://ollama:11434", Model: "llama3",
+		Temperature: 0.7, CreatedAt: created, UpdatedAt: created,
+	}
+	want := db.AiSetting{
+		ID: 1, Provider: p.Provider, BaseUrl: p.BaseUrl, Model: p.Model,
+		Temperature: p.Temperature, CreatedAt: created, UpdatedAt: created,
+	}
+	assertSettings(t, "insert", q.UpsertAISettings, q.GetAISettings, p, want)
+
+	p = db.UpsertAISettingsParams{
+		Provider: "anthropic", BaseUrl: "https://api.anthropic.com", Model: "claude",
+		Temperature: 0.2, SystemPrompt: str("Be brief."), ApiKeyCt: []byte{1, 2, 3},
+		ApiKeyLast4: str("wxyz"), KeyVerifiedAt: str(updated), CreatedAt: updated, UpdatedAt: updated,
+	}
+	want = db.AiSetting{
+		ID: 1, Provider: p.Provider, BaseUrl: p.BaseUrl, Model: p.Model,
+		Temperature: p.Temperature, SystemPrompt: p.SystemPrompt, ApiKeyCt: p.ApiKeyCt,
+		ApiKeyLast4: p.ApiKeyLast4, KeyVerifiedAt: p.KeyVerifiedAt,
+		CreatedAt: created, UpdatedAt: updated,
+	}
+	assertSettings(t, "update", q.UpsertAISettings, q.GetAISettings, p, want)
+}
+
+func TestRecipeSearchSettings(t *testing.T) {
+	ctx := context.Background()
+	_, q := openQueries(t)
+	_, err := q.GetRecipeSearchSettings(ctx)
+	mustNoRows(t, "GetRecipeSearchSettings before upsert", err)
+
+	p := db.UpsertRecipeSearchSettingsParams{
+		Provider: "searxng", BaseUrl: str("http://searxng:8080"), CreatedAt: created, UpdatedAt: created,
+	}
+	want := db.RecipeSearchSetting{
+		ID: 1, Provider: p.Provider, BaseUrl: p.BaseUrl, CreatedAt: created, UpdatedAt: created,
+	}
+	assertSettings(t, "insert", q.UpsertRecipeSearchSettings, q.GetRecipeSearchSettings, p, want)
+
+	p = db.UpsertRecipeSearchSettingsParams{
+		Provider: "brave", ApiKeyCt: []byte{9, 8, 7}, CreatedAt: updated, UpdatedAt: updated,
+	}
+	want = db.RecipeSearchSetting{
+		ID: 1, Provider: p.Provider, ApiKeyCt: p.ApiKeyCt, CreatedAt: created, UpdatedAt: updated,
+	}
+	assertSettings(t, "update", q.UpsertRecipeSearchSettings, q.GetRecipeSearchSettings, p, want)
+}
+
+func TestIntegrationsGoogle(t *testing.T) {
+	ctx := context.Background()
+	_, q := openQueries(t)
+	_, err := q.GetIntegrationsGoogle(ctx)
+	mustNoRows(t, "GetIntegrationsGoogle before upsert", err)
+
+	p := db.UpsertIntegrationsGoogleParams{
+		RefreshTokenCt: []byte{1}, ConnectedAt: created, CreatedAt: created, UpdatedAt: created,
+	}
+	want := db.IntegrationsGoogle{
+		ID: 1, RefreshTokenCt: p.RefreshTokenCt, ConnectedAt: created, CreatedAt: created, UpdatedAt: created,
+	}
+	assertSettings(t, "insert", q.UpsertIntegrationsGoogle, q.GetIntegrationsGoogle, p, want)
+
+	p = db.UpsertIntegrationsGoogleParams{
+		RefreshTokenCt: []byte{2, 3}, CalendarID: str("family@group.calendar.google.com"),
+		CalendarName: str("Family"), ConnectedAt: updated, LastSyncError: str("quota exceeded"),
+		CreatedAt: updated, UpdatedAt: updated,
+	}
+	want = db.IntegrationsGoogle{
+		ID: 1, RefreshTokenCt: p.RefreshTokenCt, CalendarID: p.CalendarID,
+		CalendarName: p.CalendarName, ConnectedAt: updated, LastSyncError: p.LastSyncError,
+		CreatedAt: created, UpdatedAt: updated,
+	}
+	assertSettings(t, "update", q.UpsertIntegrationsGoogle, q.GetIntegrationsGoogle, p, want)
+}
+
+func TestChatSettings(t *testing.T) {
+	ctx := context.Background()
+	_, q := openQueries(t)
+	_, err := q.GetChatSettings(ctx)
+	mustNoRows(t, "GetChatSettings before upsert", err)
+
+	p := db.UpsertChatSettingsParams{
+		WebhookUrlCt: []byte{4, 5}, CreatedAt: created, UpdatedAt: created,
+	}
+	want := db.ChatSetting{
+		ID: 1, WebhookUrlCt: p.WebhookUrlCt, CreatedAt: created, UpdatedAt: created,
+	}
+	assertSettings(t, "insert", q.UpsertChatSettings, q.GetChatSettings, p, want)
+
+	p = db.UpsertChatSettingsParams{
+		WebhookUrlCt: []byte{6}, SpaceLabel: str("Kitchen"), LastTestAt: str(updated),
+		LastTestStatus: str("ok"), CreatedAt: updated, UpdatedAt: updated,
+	}
+	want = db.ChatSetting{
+		ID: 1, WebhookUrlCt: p.WebhookUrlCt, SpaceLabel: p.SpaceLabel, LastTestAt: p.LastTestAt,
+		LastTestStatus: p.LastTestStatus, CreatedAt: created, UpdatedAt: updated,
+	}
+	assertSettings(t, "update", q.UpsertChatSettings, q.GetChatSettings, p, want)
+}
+
+// assertSettings upserts p and checks that both the returned row and a
+// fresh Get equal want. On update, want keeps the original created_at.
+func assertSettings[P, R any](
+	t *testing.T, what string,
+	upsert func(context.Context, P) (R, error), get func(context.Context) (R, error),
+	p P, want R,
+) {
+	t.Helper()
+	ctx := context.Background()
+	got, err := upsert(ctx, p)
+	if err != nil {
+		t.Fatalf("%s upsert: %v", what, err)
+	}
+	if !reflect.DeepEqual(got, want) {
+		t.Fatalf("%s upsert returned %+v, want %+v", what, got, want)
+	}
+	got, err = get(ctx)
+	if err != nil {
+		t.Fatalf("%s get: %v", what, err)
+	}
+	if !reflect.DeepEqual(got, want) {
+		t.Fatalf("%s get = %+v, want %+v", what, got, want)
+	}
+}

internal/db/dinners.sql.go

@@ -0,0 +1,321 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: dinners.sql
+
+package db
+
+import (
+	"context"
+	"database/sql"
+)
+
+const archiveDinner = `-- name: ArchiveDinner :one
+UPDATE dinners
+SET status = 'archived',
+	updated_by = ?,
+	updated_at = ?
+WHERE id = ?
+RETURNING id, name, normalized_name, status, origin, method, minutes_total, difficulty, cuisine, is_favorite, recipe_id, photo_id, grounding_status, updated_by, created_at, updated_at
+`
+
+type ArchiveDinnerParams struct {
+	UpdatedBy sql.NullString
+	UpdatedAt string
+	ID        string
+}
+
+// An unknown id returns sql.ErrNoRows.
+func (q *Queries) ArchiveDinner(ctx context.Context, arg ArchiveDinnerParams) (Dinner, error) {
+	row := q.db.QueryRowContext(ctx, archiveDinner, arg.UpdatedBy, arg.UpdatedAt, arg.ID)
+	var i Dinner
+	err := row.Scan(
+		&i.ID,
+		&i.Name,
+		&i.NormalizedName,
+		&i.Status,
+		&i.Origin,
+		&i.Method,
+		&i.MinutesTotal,
+		&i.Difficulty,
+		&i.Cuisine,
+		&i.IsFavorite,
+		&i.RecipeID,
+		&i.PhotoID,
+		&i.GroundingStatus,
+		&i.UpdatedBy,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const createDinner = `-- name: CreateDinner :one
+INSERT INTO dinners (
+	id, name, normalized_name, status, origin, method, minutes_total,
+	difficulty, cuisine, is_favorite, recipe_id, photo_id, grounding_status,
+	updated_by, created_at, updated_at
+) VALUES (
+	?, ?, ?, ?, ?, ?, ?,
+	?, ?, ?, ?, ?, ?,
+	?, ?, ?
+)
+RETURNING id, name, normalized_name, status, origin, method, minutes_total, difficulty, cuisine, is_favorite, recipe_id, photo_id, grounding_status, updated_by, created_at, updated_at
+`
+
+type CreateDinnerParams struct {
+	ID              string
+	Name            string
+	NormalizedName  string
+	Status          string
+	Origin          string
+	Method          sql.NullString
+	MinutesTotal    sql.NullInt64
+	Difficulty      sql.NullString
+	Cuisine         sql.NullString
+	IsFavorite      int64
+	RecipeID        sql.NullString
+	PhotoID         sql.NullString
+	GroundingStatus string
+	UpdatedBy       sql.NullString
+	CreatedAt       string
+	UpdatedAt       string
+}
+
+func (q *Queries) CreateDinner(ctx context.Context, arg CreateDinnerParams) (Dinner, error) {
+	row := q.db.QueryRowContext(ctx, createDinner,
+		arg.ID,
+		arg.Name,
+		arg.NormalizedName,
+		arg.Status,
+		arg.Origin,
+		arg.Method,
+		arg.MinutesTotal,
+		arg.Difficulty,
+		arg.Cuisine,
+		arg.IsFavorite,
+		arg.RecipeID,
+		arg.PhotoID,
+		arg.GroundingStatus,
+		arg.UpdatedBy,
+		arg.CreatedAt,
+		arg.UpdatedAt,
+	)
+	var i Dinner
+	err := row.Scan(
+		&i.ID,
+		&i.Name,
+		&i.NormalizedName,
+		&i.Status,
+		&i.Origin,
+		&i.Method,
+		&i.MinutesTotal,
+		&i.Difficulty,
+		&i.Cuisine,
+		&i.IsFavorite,
+		&i.RecipeID,
+		&i.PhotoID,
+		&i.GroundingStatus,
+		&i.UpdatedBy,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const getDinner = `-- name: GetDinner :one
+SELECT id, name, normalized_name, status, origin, method, minutes_total, difficulty, cuisine, is_favorite, recipe_id, photo_id, grounding_status, updated_by, created_at, updated_at FROM dinners
+WHERE id = ?
+`
+
+func (q *Queries) GetDinner(ctx context.Context, id string) (Dinner, error) {
+	row := q.db.QueryRowContext(ctx, getDinner, id)
+	var i Dinner
+	err := row.Scan(
+		&i.ID,
+		&i.Name,
+		&i.NormalizedName,
+		&i.Status,
+		&i.Origin,
+		&i.Method,
+		&i.MinutesTotal,
+		&i.Difficulty,
+		&i.Cuisine,
+		&i.IsFavorite,
+		&i.RecipeID,
+		&i.PhotoID,
+		&i.GroundingStatus,
+		&i.UpdatedBy,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const listDinnersByStatus = `-- name: ListDinnersByStatus :many
+SELECT id, name, normalized_name, status, origin, method, minutes_total, difficulty, cuisine, is_favorite, recipe_id, photo_id, grounding_status, updated_by, created_at, updated_at FROM dinners
+WHERE status = ?
+ORDER BY normalized_name, id
+`
+
+func (q *Queries) ListDinnersByStatus(ctx context.Context, status string) ([]Dinner, error) {
+	rows, err := q.db.QueryContext(ctx, listDinnersByStatus, status)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []Dinner
+	for rows.Next() {
+		var i Dinner
+		if err := rows.Scan(
+			&i.ID,
+			&i.Name,
+			&i.NormalizedName,
+			&i.Status,
+			&i.Origin,
+			&i.Method,
+			&i.MinutesTotal,
+			&i.Difficulty,
+			&i.Cuisine,
+			&i.IsFavorite,
+			&i.RecipeID,
+			&i.PhotoID,
+			&i.GroundingStatus,
+			&i.UpdatedBy,
+			&i.CreatedAt,
+			&i.UpdatedAt,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Close(); err != nil {
+		return nil, err
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}
+
+const setDinnerFavorite = `-- name: SetDinnerFavorite :one
+UPDATE dinners
+SET is_favorite = ?,
+	updated_by = ?,
+	updated_at = ?
+WHERE id = ?
+RETURNING id, name, normalized_name, status, origin, method, minutes_total, difficulty, cuisine, is_favorite, recipe_id, photo_id, grounding_status, updated_by, created_at, updated_at
+`
+
+type SetDinnerFavoriteParams struct {
+	IsFavorite int64
+	UpdatedBy  sql.NullString
+	UpdatedAt  string
+	ID         string
+}
+
+// An unknown id returns sql.ErrNoRows.
+func (q *Queries) SetDinnerFavorite(ctx context.Context, arg SetDinnerFavoriteParams) (Dinner, error) {
+	row := q.db.QueryRowContext(ctx, setDinnerFavorite,
+		arg.IsFavorite,
+		arg.UpdatedBy,
+		arg.UpdatedAt,
+		arg.ID,
+	)
+	var i Dinner
+	err := row.Scan(
+		&i.ID,
+		&i.Name,
+		&i.NormalizedName,
+		&i.Status,
+		&i.Origin,
+		&i.Method,
+		&i.MinutesTotal,
+		&i.Difficulty,
+		&i.Cuisine,
+		&i.IsFavorite,
+		&i.RecipeID,
+		&i.PhotoID,
+		&i.GroundingStatus,
+		&i.UpdatedBy,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const updateDinner = `-- name: UpdateDinner :one
+UPDATE dinners
+SET name = ?,
+	normalized_name = ?,
+	status = ?,
+	origin = ?,
+	method = ?,
+	minutes_total = ?,
+	difficulty = ?,
+	cuisine = ?,
+	recipe_id = ?,
+	photo_id = ?,
+	grounding_status = ?,
+	updated_by = ?,
+	updated_at = ?
+WHERE id = ?
+RETURNING id, name, normalized_name, status, origin, method, minutes_total, difficulty, cuisine, is_favorite, recipe_id, photo_id, grounding_status, updated_by, created_at, updated_at
+`
+
+type UpdateDinnerParams struct {
+	Name            string
+	NormalizedName  string
+	Status          string
+	Origin          string
+	Method          sql.NullString
+	MinutesTotal    sql.NullInt64
+	Difficulty      sql.NullString
+	Cuisine         sql.NullString
+	RecipeID        sql.NullString
+	PhotoID         sql.NullString
+	GroundingStatus string
+	UpdatedBy       sql.NullString
+	UpdatedAt       string
+	ID              string
+}
+
+// An unknown id returns sql.ErrNoRows.
+func (q *Queries) UpdateDinner(ctx context.Context, arg UpdateDinnerParams) (Dinner, error) {
+	row := q.db.QueryRowContext(ctx, updateDinner,
+		arg.Name,
+		arg.NormalizedName,
+		arg.Status,
+		arg.Origin,
+		arg.Method,
+		arg.MinutesTotal,
+		arg.Difficulty,
+		arg.Cuisine,
+		arg.RecipeID,
+		arg.PhotoID,
+		arg.GroundingStatus,
+		arg.UpdatedBy,
+		arg.UpdatedAt,
+		arg.ID,
+	)
+	var i Dinner
+	err := row.Scan(
+		&i.ID,
+		&i.Name,
+		&i.NormalizedName,
+		&i.Status,
+		&i.Origin,
+		&i.Method,
+		&i.MinutesTotal,
+		&i.Difficulty,
+		&i.Cuisine,
+		&i.IsFavorite,
+		&i.RecipeID,
+		&i.PhotoID,
+		&i.GroundingStatus,
+		&i.UpdatedBy,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}

internal/db/models.go

@@ -0,0 +1,309 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+
+package db
+
+import (
+	"database/sql"
+)
+
+type AiRun struct {
+	ID               string
+	Skill            string
+	SkillVersion     string
+	Provider         string
+	Model            string
+	Temperature      float64
+	Status           string
+	LatencyMs        sql.NullInt64
+	TokensIn         sql.NullInt64
+	TokensOut        sql.NullInt64
+	Error            sql.NullString
+	RequestRedacted  string
+	ResponseRedacted sql.NullString
+	CreatedAt        string
+	UpdatedAt        string
+}
+
+type AiSetting struct {
+	ID            int64
+	Provider      string
+	BaseUrl       string
+	Model         string
+	Temperature   float64
+	SystemPrompt  sql.NullString
+	ApiKeyCt      []byte
+	ApiKeyLast4   sql.NullString
+	KeyVerifiedAt sql.NullString
+	CreatedAt     string
+	UpdatedAt     string
+}
+
+type ChatSetting struct {
+	ID             int64
+	WebhookUrlCt   []byte
+	SpaceLabel     sql.NullString
+	LastTestAt     sql.NullString
+	LastTestStatus sql.NullString
+	CreatedAt      string
+	UpdatedAt      string
+}
+
+type Dinner struct {
+	ID              string
+	Name            string
+	NormalizedName  string
+	Status          string
+	Origin          string
+	Method          sql.NullString
+	MinutesTotal    sql.NullInt64
+	Difficulty      sql.NullString
+	Cuisine         sql.NullString
+	IsFavorite      int64
+	RecipeID        sql.NullString
+	PhotoID         sql.NullString
+	GroundingStatus string
+	UpdatedBy       sql.NullString
+	CreatedAt       string
+	UpdatedAt       string
+}
+
+type HouseholdSetting struct {
+	ID                    int64
+	Timezone              string
+	DinnerTime            string
+	ReminderTime          string
+	ReviewTime            string
+	PlanDraftDow          int64
+	PlanDraftTime         string
+	SuggestionsDow        int64
+	SuggestionsTime       string
+	ChatAutosendDow       int64
+	ChatAutosendTime      string
+	OnboardingCompletedAt sql.NullString
+	UpdatesSeenAt         sql.NullString
+	CreatedAt             string
+	UpdatedAt             string
+}
+
+type IntegrationsGoogle struct {
+	ID             int64
+	RefreshTokenCt []byte
+	CalendarID     sql.NullString
+	CalendarName   sql.NullString
+	ConnectedAt    string
+	LastSyncError  sql.NullString
+	CreatedAt      string
+	UpdatedAt      string
+}
+
+type Job struct {
+	ID         string
+	Kind       string
+	Status     string
+	Payload    string
+	Result     sql.NullString
+	Error      sql.NullString
+	StartedAt  sql.NullString
+	FinishedAt sql.NullString
+	CreatedAt  string
+	UpdatedAt  string
+}
+
+type NotificationOutbox struct {
+	ID            string
+	EventKey      string
+	Channel       string
+	Payload       string
+	Status        string
+	Attempts      int64
+	NextAttemptAt sql.NullString
+	LastError     sql.NullString
+	CreatedAt     string
+	UpdatedAt     string
+}
+
+type NotificationPref struct {
+	Event     string
+	Push      int64
+	Chat      int64
+	CreatedAt string
+	UpdatedAt string
+}
+
+type Photo struct {
+	ID        string
+	SourceUrl string
+	LocalPath string
+	Width     int64
+	Height    int64
+	Sha256    string
+	FetchedAt string
+	CreatedAt string
+	UpdatedAt string
+}
+
+type PlanDay struct {
+	ID              string
+	PlanID          string
+	Date            string
+	DinnerID        sql.NullString
+	IsNew           int64
+	CalendarEventID sql.NullString
+	CreatedAt       string
+	UpdatedAt       string
+}
+
+type PushSubscription struct {
+	ID            string
+	Endpoint      string
+	P256dh        string
+	Auth          string
+	UserAgent     sql.NullString
+	FailureCount  int64
+	LastSuccessAt sql.NullString
+	CreatedAt     string
+	UpdatedAt     string
+}
+
+type Recipe struct {
+	ID           string
+	SourceUrl    string
+	SiteName     sql.NullString
+	Title        string
+	TotalMinutes sql.NullInt64
+	PrepMinutes  sql.NullInt64
+	CookMinutes  sql.NullInt64
+	Yield        sql.NullString
+	RawJsonld    string
+	FetchedAt    string
+	CreatedAt    string
+	UpdatedAt    string
+}
+
+type RecipeIngredient struct {
+	ID        string
+	RecipeID  string
+	Position  int64
+	RawText   string
+	Name      sql.NullString
+	Qty       sql.NullString
+	Unit      sql.NullString
+	Note      sql.NullString
+	CreatedAt string
+	UpdatedAt string
+}
+
+type RecipeSearchSetting struct {
+	ID        int64
+	Provider  string
+	BaseUrl   sql.NullString
+	ApiKeyCt  []byte
+	CreatedAt string
+	UpdatedAt string
+}
+
+type RecipeStep struct {
+	ID        string
+	RecipeID  string
+	Position  int64
+	Text      string
+	CreatedAt string
+	UpdatedAt string
+}
+
+type RotationReview struct {
+	ID        string
+	DinnerID  string
+	PlanDate  string
+	Status    string
+	Decision  sql.NullString
+	DecidedAt sql.NullString
+	UpdatedBy sql.NullString
+	CreatedAt string
+	UpdatedAt string
+}
+
+type ScheduleRun struct {
+	ID        string
+	Schedule  string
+	PeriodKey string
+	CreatedAt string
+}
+
+type Session struct {
+	IDHash     string
+	Subject    string
+	Email      string
+	Name       string
+	Groups     string
+	CsrfToken  string
+	CreatedAt  string
+	LastSeenAt string
+	ExpiresAt  string
+}
+
+type ShoppingGroup struct {
+	ID        string
+	ListID    string
+	DinnerID  string
+	Position  int64
+	CreatedAt string
+	UpdatedAt string
+}
+
+type ShoppingItem struct {
+	ID        string
+	GroupID   string
+	Name      string
+	Qty       sql.NullString
+	Needed    int64
+	Position  int64
+	CreatedAt string
+	UpdatedAt string
+}
+
+type ShoppingList struct {
+	ID           string
+	WeekStart    string
+	PlanID       string
+	Title        string
+	Status       string
+	SentToChatAt sql.NullString
+	FrozenAt     sql.NullString
+	CreatedAt    string
+	UpdatedAt    string
+}
+
+type Suggestion struct {
+	ID              string
+	DinnerID        string
+	BatchID         string
+	Reason          string
+	CitedRegularIds string
+	Status          string
+	DecidedAt       sql.NullString
+	CreatedAt       string
+	UpdatedAt       string
+}
+
+type SuggestionBatch struct {
+	ID        string
+	Trigger   string
+	Status    string
+	AiRunID   sql.NullString
+	CreatedAt string
+	UpdatedAt string
+}
+
+type WeekPlan struct {
+	ID               string
+	WeekStart        string
+	Status           string
+	AiNote           sql.NullString
+	AiRunID          sql.NullString
+	CalendarSyncedAt sql.NullString
+	CreatedAt        string
+	UpdatedAt        string
+}

internal/db/photos.sql.go

@@ -0,0 +1,86 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: photos.sql
+
+package db
+
+import (
+	"context"
+)
+
+const createPhoto = `-- name: CreatePhoto :one
+INSERT INTO photos (
+	id, source_url, local_path, width, height, sha256, fetched_at,
+	created_at, updated_at
+) VALUES (
+	?, ?, ?, ?, ?, ?, ?,
+	?, ?
+)
+RETURNING id, source_url, local_path, width, height, sha256, fetched_at, created_at, updated_at
+`
+
+type CreatePhotoParams struct {
+	ID        string
+	SourceUrl string
+	LocalPath string
+	Width     int64
+	Height    int64
+	Sha256    string
+	FetchedAt string
+	CreatedAt string
+	UpdatedAt string
+}
+
+func (q *Queries) CreatePhoto(ctx context.Context, arg CreatePhotoParams) (Photo, error) {
+	row := q.db.QueryRowContext(ctx, createPhoto,
+		arg.ID,
+		arg.SourceUrl,
+		arg.LocalPath,
+		arg.Width,
+		arg.Height,
+		arg.Sha256,
+		arg.FetchedAt,
+		arg.CreatedAt,
+		arg.UpdatedAt,
+	)
+	var i Photo
+	err := row.Scan(
+		&i.ID,
+		&i.SourceUrl,
+		&i.LocalPath,
+		&i.Width,
+		&i.Height,
+		&i.Sha256,
+		&i.FetchedAt,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const getPhotoBySHA256 = `-- name: GetPhotoBySHA256 :one
+SELECT id, source_url, local_path, width, height, sha256, fetched_at, created_at, updated_at FROM photos
+WHERE sha256 = ?
+ORDER BY id
+LIMIT 1
+`
+
+// Finds stored image bytes by content hash. The schema does not make sha256
+// unique, so the earliest-created (lowest id) match is returned.
+func (q *Queries) GetPhotoBySHA256(ctx context.Context, sha256 string) (Photo, error) {
+	row := q.db.QueryRowContext(ctx, getPhotoBySHA256, sha256)
+	var i Photo
+	err := row.Scan(
+		&i.ID,
+		&i.SourceUrl,
+		&i.LocalPath,
+		&i.Width,
+		&i.Height,
+		&i.Sha256,
+		&i.FetchedAt,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}

internal/db/querier.go

@@ -0,0 +1,65 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+
+package db
+
+import (
+	"context"
+)
+
+type Querier interface {
+	// An unknown id returns sql.ErrNoRows.
+	ArchiveDinner(ctx context.Context, arg ArchiveDinnerParams) (Dinner, error)
+	CreateDinner(ctx context.Context, arg CreateDinnerParams) (Dinner, error)
+	CreatePhoto(ctx context.Context, arg CreatePhotoParams) (Photo, error)
+	CreateRecipeIngredient(ctx context.Context, arg CreateRecipeIngredientParams) error
+	CreateRecipeStep(ctx context.Context, arg CreateRecipeStepParams) error
+	DeleteRecipeIngredients(ctx context.Context, recipeID string) error
+	DeleteRecipeSteps(ctx context.Context, recipeID string) error
+	// Returns sql.ErrNoRows until the row exists.
+	GetAISettings(ctx context.Context) (AiSetting, error)
+	// Returns sql.ErrNoRows until the row exists.
+	GetChatSettings(ctx context.Context) (ChatSetting, error)
+	GetDinner(ctx context.Context, id string) (Dinner, error)
+	// Returns sql.ErrNoRows until the row exists.
+	GetHouseholdSettings(ctx context.Context) (HouseholdSetting, error)
+	// Returns sql.ErrNoRows until the row exists.
+	GetIntegrationsGoogle(ctx context.Context) (IntegrationsGoogle, error)
+	// Finds stored image bytes by content hash. The schema does not make sha256
+	// unique, so the earliest-created (lowest id) match is returned.
+	GetPhotoBySHA256(ctx context.Context, sha256 string) (Photo, error)
+	GetRecipe(ctx context.Context, id string) (Recipe, error)
+	GetRecipeBySourceURL(ctx context.Context, sourceUrl string) (Recipe, error)
+	// Returns sql.ErrNoRows until the row exists.
+	GetRecipeSearchSettings(ctx context.Context) (RecipeSearchSetting, error)
+	ListDinnersByStatus(ctx context.Context, status string) ([]Dinner, error)
+	ListRecipeIngredients(ctx context.Context, recipeID string) ([]RecipeIngredient, error)
+	ListRecipeSteps(ctx context.Context, recipeID string) ([]RecipeStep, error)
+	// An unknown id returns sql.ErrNoRows.
+	SetDinnerFavorite(ctx context.Context, arg SetDinnerFavoriteParams) (Dinner, error)
+	// An unknown id returns sql.ErrNoRows.
+	UpdateDinner(ctx context.Context, arg UpdateDinnerParams) (Dinner, error)
+	// Creates the single row (id 1) or replaces every column except id and
+	// created_at.
+	UpsertAISettings(ctx context.Context, arg UpsertAISettingsParams) (AiSetting, error)
+	// Creates the single row (id 1) or replaces every column except id and
+	// created_at.
+	UpsertChatSettings(ctx context.Context, arg UpsertChatSettingsParams) (ChatSetting, error)
+	// Creates the single row (id 1) or replaces every column except id and
+	// created_at.
+	UpsertHouseholdSettings(ctx context.Context, arg UpsertHouseholdSettingsParams) (HouseholdSetting, error)
+	// Creates the single row (id 1) or replaces every column except id and
+	// created_at.
+	UpsertIntegrationsGoogle(ctx context.Context, arg UpsertIntegrationsGoogleParams) (IntegrationsGoogle, error)
+	// A recipe is keyed by source_url: re-fetching the same URL updates the
+	// existing row and keeps its id and created_at, which the returned row
+	// carries. Replace its ingredients and steps in the same transaction with
+	// DeleteRecipeIngredients/DeleteRecipeSteps then the Create queries.
+	UpsertRecipe(ctx context.Context, arg UpsertRecipeParams) (Recipe, error)
+	// Creates the single row (id 1) or replaces every column except id and
+	// created_at.
+	UpsertRecipeSearchSettings(ctx context.Context, arg UpsertRecipeSearchSettingsParams) (RecipeSearchSetting, error)
+}
+
+var _ Querier = (*Queries)(nil)

internal/db/recipes.sql.go

@@ -0,0 +1,298 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: recipes.sql
+
+package db
+
+import (
+	"context"
+	"database/sql"
+)
+
+const createRecipeIngredient = `-- name: CreateRecipeIngredient :exec
+INSERT INTO recipe_ingredients (
+	id, recipe_id, position, raw_text, name, qty, unit, note,
+	created_at, updated_at
+) VALUES (
+	?, ?, ?, ?, ?, ?, ?, ?,
+	?, ?
+)
+`
+
+type CreateRecipeIngredientParams struct {
+	ID        string
+	RecipeID  string
+	Position  int64
+	RawText   string
+	Name      sql.NullString
+	Qty       sql.NullString
+	Unit      sql.NullString
+	Note      sql.NullString
+	CreatedAt string
+	UpdatedAt string
+}
+
+func (q *Queries) CreateRecipeIngredient(ctx context.Context, arg CreateRecipeIngredientParams) error {
+	_, err := q.db.ExecContext(ctx, createRecipeIngredient,
+		arg.ID,
+		arg.RecipeID,
+		arg.Position,
+		arg.RawText,
+		arg.Name,
+		arg.Qty,
+		arg.Unit,
+		arg.Note,
+		arg.CreatedAt,
+		arg.UpdatedAt,
+	)
+	return err
+}
+
+const createRecipeStep = `-- name: CreateRecipeStep :exec
+INSERT INTO recipe_steps (
+	id, recipe_id, position, text, created_at, updated_at
+) VALUES (
+	?, ?, ?, ?, ?, ?
+)
+`
+
+type CreateRecipeStepParams struct {
+	ID        string
+	RecipeID  string
+	Position  int64
+	Text      string
+	CreatedAt string
+	UpdatedAt string
+}
+
+func (q *Queries) CreateRecipeStep(ctx context.Context, arg CreateRecipeStepParams) error {
+	_, err := q.db.ExecContext(ctx, createRecipeStep,
+		arg.ID,
+		arg.RecipeID,
+		arg.Position,
+		arg.Text,
+		arg.CreatedAt,
+		arg.UpdatedAt,
+	)
+	return err
+}
+
+const deleteRecipeIngredients = `-- name: DeleteRecipeIngredients :exec
+DELETE FROM recipe_ingredients
+WHERE recipe_id = ?
+`
+
+func (q *Queries) DeleteRecipeIngredients(ctx context.Context, recipeID string) error {
+	_, err := q.db.ExecContext(ctx, deleteRecipeIngredients, recipeID)
+	return err
+}
+
+const deleteRecipeSteps = `-- name: DeleteRecipeSteps :exec
+DELETE FROM recipe_steps
+WHERE recipe_id = ?
+`
+
+func (q *Queries) DeleteRecipeSteps(ctx context.Context, recipeID string) error {
+	_, err := q.db.ExecContext(ctx, deleteRecipeSteps, recipeID)
+	return err
+}
+
+const getRecipe = `-- name: GetRecipe :one
+SELECT id, source_url, site_name, title, total_minutes, prep_minutes, cook_minutes, yield, raw_jsonld, fetched_at, created_at, updated_at FROM recipes
+WHERE id = ?
+`
+
+func (q *Queries) GetRecipe(ctx context.Context, id string) (Recipe, error) {
+	row := q.db.QueryRowContext(ctx, getRecipe, id)
+	var i Recipe
+	err := row.Scan(
+		&i.ID,
+		&i.SourceUrl,
+		&i.SiteName,
+		&i.Title,
+		&i.TotalMinutes,
+		&i.PrepMinutes,
+		&i.CookMinutes,
+		&i.Yield,
+		&i.RawJsonld,
+		&i.FetchedAt,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const getRecipeBySourceURL = `-- name: GetRecipeBySourceURL :one
+SELECT id, source_url, site_name, title, total_minutes, prep_minutes, cook_minutes, yield, raw_jsonld, fetched_at, created_at, updated_at FROM recipes
+WHERE source_url = ?
+`
+
+func (q *Queries) GetRecipeBySourceURL(ctx context.Context, sourceUrl string) (Recipe, error) {
+	row := q.db.QueryRowContext(ctx, getRecipeBySourceURL, sourceUrl)
+	var i Recipe
+	err := row.Scan(
+		&i.ID,
+		&i.SourceUrl,
+		&i.SiteName,
+		&i.Title,
+		&i.TotalMinutes,
+		&i.PrepMinutes,
+		&i.CookMinutes,
+		&i.Yield,
+		&i.RawJsonld,
+		&i.FetchedAt,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const listRecipeIngredients = `-- name: ListRecipeIngredients :many
+SELECT id, recipe_id, position, raw_text, name, qty, unit, note, created_at, updated_at FROM recipe_ingredients
+WHERE recipe_id = ?
+ORDER BY position, id
+`
+
+func (q *Queries) ListRecipeIngredients(ctx context.Context, recipeID string) ([]RecipeIngredient, error) {
+	rows, err := q.db.QueryContext(ctx, listRecipeIngredients, recipeID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []RecipeIngredient
+	for rows.Next() {
+		var i RecipeIngredient
+		if err := rows.Scan(
+			&i.ID,
+			&i.RecipeID,
+			&i.Position,
+			&i.RawText,
+			&i.Name,
+			&i.Qty,
+			&i.Unit,
+			&i.Note,
+			&i.CreatedAt,
+			&i.UpdatedAt,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Close(); err != nil {
+		return nil, err
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}
+
+const listRecipeSteps = `-- name: ListRecipeSteps :many
+SELECT id, recipe_id, position, text, created_at, updated_at FROM recipe_steps
+WHERE recipe_id = ?
+ORDER BY position, id
+`
+
+func (q *Queries) ListRecipeSteps(ctx context.Context, recipeID string) ([]RecipeStep, error) {
+	rows, err := q.db.QueryContext(ctx, listRecipeSteps, recipeID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []RecipeStep
+	for rows.Next() {
+		var i RecipeStep
+		if err := rows.Scan(
+			&i.ID,
+			&i.RecipeID,
+			&i.Position,
+			&i.Text,
+			&i.CreatedAt,
+			&i.UpdatedAt,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Close(); err != nil {
+		return nil, err
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}
+
+const upsertRecipe = `-- name: UpsertRecipe :one
+INSERT INTO recipes (
+	id, source_url, site_name, title, total_minutes, prep_minutes,
+	cook_minutes, yield, raw_jsonld, fetched_at, created_at, updated_at
+) VALUES (
+	?, ?, ?, ?, ?, ?,
+	?, ?, ?, ?, ?, ?
+)
+ON CONFLICT (source_url) DO UPDATE SET
+	site_name = excluded.site_name,
+	title = excluded.title,
+	total_minutes = excluded.total_minutes,
+	prep_minutes = excluded.prep_minutes,
+	cook_minutes = excluded.cook_minutes,
+	yield = excluded.yield,
+	raw_jsonld = excluded.raw_jsonld,
+	fetched_at = excluded.fetched_at,
+	updated_at = excluded.updated_at
+RETURNING id, source_url, site_name, title, total_minutes, prep_minutes, cook_minutes, yield, raw_jsonld, fetched_at, created_at, updated_at
+`
+
+type UpsertRecipeParams struct {
+	ID           string
+	SourceUrl    string
+	SiteName     sql.NullString
+	Title        string
+	TotalMinutes sql.NullInt64
+	PrepMinutes  sql.NullInt64
+	CookMinutes  sql.NullInt64
+	Yield        sql.NullString
+	RawJsonld    string
+	FetchedAt    string
+	CreatedAt    string
+	UpdatedAt    string
+}
+
+// A recipe is keyed by source_url: re-fetching the same URL updates the
+// existing row and keeps its id and created_at, which the returned row
+// carries. Replace its ingredients and steps in the same transaction with
+// DeleteRecipeIngredients/DeleteRecipeSteps then the Create queries.
+func (q *Queries) UpsertRecipe(ctx context.Context, arg UpsertRecipeParams) (Recipe, error) {
+	row := q.db.QueryRowContext(ctx, upsertRecipe,
+		arg.ID,
+		arg.SourceUrl,
+		arg.SiteName,
+		arg.Title,
+		arg.TotalMinutes,
+		arg.PrepMinutes,
+		arg.CookMinutes,
+		arg.Yield,
+		arg.RawJsonld,
+		arg.FetchedAt,
+		arg.CreatedAt,
+		arg.UpdatedAt,
+	)
+	var i Recipe
+	err := row.Scan(
+		&i.ID,
+		&i.SourceUrl,
+		&i.SiteName,
+		&i.Title,
+		&i.TotalMinutes,
+		&i.PrepMinutes,
+		&i.CookMinutes,
+		&i.Yield,
+		&i.RawJsonld,
+		&i.FetchedAt,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}

internal/db/settings.sql.go

@@ -0,0 +1,428 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: settings.sql
+
+package db
+
+import (
+	"context"
+	"database/sql"
+)
+
+const getAISettings = `-- name: GetAISettings :one
+SELECT id, provider, base_url, model, temperature, system_prompt, api_key_ct, api_key_last4, key_verified_at, created_at, updated_at FROM ai_settings
+WHERE id = 1
+`
+
+// Returns sql.ErrNoRows until the row exists.
+func (q *Queries) GetAISettings(ctx context.Context) (AiSetting, error) {
+	row := q.db.QueryRowContext(ctx, getAISettings)
+	var i AiSetting
+	err := row.Scan(
+		&i.ID,
+		&i.Provider,
+		&i.BaseUrl,
+		&i.Model,
+		&i.Temperature,
+		&i.SystemPrompt,
+		&i.ApiKeyCt,
+		&i.ApiKeyLast4,
+		&i.KeyVerifiedAt,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const getChatSettings = `-- name: GetChatSettings :one
+SELECT id, webhook_url_ct, space_label, last_test_at, last_test_status, created_at, updated_at FROM chat_settings
+WHERE id = 1
+`
+
+// Returns sql.ErrNoRows until the row exists.
+func (q *Queries) GetChatSettings(ctx context.Context) (ChatSetting, error) {
+	row := q.db.QueryRowContext(ctx, getChatSettings)
+	var i ChatSetting
+	err := row.Scan(
+		&i.ID,
+		&i.WebhookUrlCt,
+		&i.SpaceLabel,
+		&i.LastTestAt,
+		&i.LastTestStatus,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const getHouseholdSettings = `-- name: GetHouseholdSettings :one
+SELECT id, timezone, dinner_time, reminder_time, review_time, plan_draft_dow, plan_draft_time, suggestions_dow, suggestions_time, chat_autosend_dow, chat_autosend_time, onboarding_completed_at, updates_seen_at, created_at, updated_at FROM household_settings
+WHERE id = 1
+`
+
+// Returns sql.ErrNoRows until the row exists.
+func (q *Queries) GetHouseholdSettings(ctx context.Context) (HouseholdSetting, error) {
+	row := q.db.QueryRowContext(ctx, getHouseholdSettings)
+	var i HouseholdSetting
+	err := row.Scan(
+		&i.ID,
+		&i.Timezone,
+		&i.DinnerTime,
+		&i.ReminderTime,
+		&i.ReviewTime,
+		&i.PlanDraftDow,
+		&i.PlanDraftTime,
+		&i.SuggestionsDow,
+		&i.SuggestionsTime,
+		&i.ChatAutosendDow,
+		&i.ChatAutosendTime,
+		&i.OnboardingCompletedAt,
+		&i.UpdatesSeenAt,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const getIntegrationsGoogle = `-- name: GetIntegrationsGoogle :one
+SELECT id, refresh_token_ct, calendar_id, calendar_name, connected_at, last_sync_error, created_at, updated_at FROM integrations_google
+WHERE id = 1
+`
+
+// Returns sql.ErrNoRows until the row exists.
+func (q *Queries) GetIntegrationsGoogle(ctx context.Context) (IntegrationsGoogle, error) {
+	row := q.db.QueryRowContext(ctx, getIntegrationsGoogle)
+	var i IntegrationsGoogle
+	err := row.Scan(
+		&i.ID,
+		&i.RefreshTokenCt,
+		&i.CalendarID,
+		&i.CalendarName,
+		&i.ConnectedAt,
+		&i.LastSyncError,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const getRecipeSearchSettings = `-- name: GetRecipeSearchSettings :one
+SELECT id, provider, base_url, api_key_ct, created_at, updated_at FROM recipe_search_settings
+WHERE id = 1
+`
+
+// Returns sql.ErrNoRows until the row exists.
+func (q *Queries) GetRecipeSearchSettings(ctx context.Context) (RecipeSearchSetting, error) {
+	row := q.db.QueryRowContext(ctx, getRecipeSearchSettings)
+	var i RecipeSearchSetting
+	err := row.Scan(
+		&i.ID,
+		&i.Provider,
+		&i.BaseUrl,
+		&i.ApiKeyCt,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const upsertAISettings = `-- name: UpsertAISettings :one
+INSERT INTO ai_settings (
+	id, provider, base_url, model, temperature, system_prompt, api_key_ct,
+	api_key_last4, key_verified_at, created_at, updated_at
+) VALUES (
+	1, ?, ?, ?, ?, ?, ?,
+	?, ?, ?, ?
+)
+ON CONFLICT (id) DO UPDATE SET
+	provider = excluded.provider,
+	base_url = excluded.base_url,
+	model = excluded.model,
+	temperature = excluded.temperature,
+	system_prompt = excluded.system_prompt,
+	api_key_ct = excluded.api_key_ct,
+	api_key_last4 = excluded.api_key_last4,
+	key_verified_at = excluded.key_verified_at,
+	updated_at = excluded.updated_at
+RETURNING id, provider, base_url, model, temperature, system_prompt, api_key_ct, api_key_last4, key_verified_at, created_at, updated_at
+`
+
+type UpsertAISettingsParams struct {
+	Provider      string
+	BaseUrl       string
+	Model         string
+	Temperature   float64
+	SystemPrompt  sql.NullString
+	ApiKeyCt      []byte
+	ApiKeyLast4   sql.NullString
+	KeyVerifiedAt sql.NullString
+	CreatedAt     string
+	UpdatedAt     string
+}
+
+// Creates the single row (id 1) or replaces every column except id and
+// created_at.
+func (q *Queries) UpsertAISettings(ctx context.Context, arg UpsertAISettingsParams) (AiSetting, error) {
+	row := q.db.QueryRowContext(ctx, upsertAISettings,
+		arg.Provider,
+		arg.BaseUrl,
+		arg.Model,
+		arg.Temperature,
+		arg.SystemPrompt,
+		arg.ApiKeyCt,
+		arg.ApiKeyLast4,
+		arg.KeyVerifiedAt,
+		arg.CreatedAt,
+		arg.UpdatedAt,
+	)
+	var i AiSetting
+	err := row.Scan(
+		&i.ID,
+		&i.Provider,
+		&i.BaseUrl,
+		&i.Model,
+		&i.Temperature,
+		&i.SystemPrompt,
+		&i.ApiKeyCt,
+		&i.ApiKeyLast4,
+		&i.KeyVerifiedAt,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const upsertChatSettings = `-- name: UpsertChatSettings :one
+INSERT INTO chat_settings (
+	id, webhook_url_ct, space_label, last_test_at, last_test_status,
+	created_at, updated_at
+) VALUES (
+	1, ?, ?, ?, ?,
+	?, ?
+)
+ON CONFLICT (id) DO UPDATE SET
+	webhook_url_ct = excluded.webhook_url_ct,
+	space_label = excluded.space_label,
+	last_test_at = excluded.last_test_at,
+	last_test_status = excluded.last_test_status,
+	updated_at = excluded.updated_at
+RETURNING id, webhook_url_ct, space_label, last_test_at, last_test_status, created_at, updated_at
+`
+
+type UpsertChatSettingsParams struct {
+	WebhookUrlCt   []byte
+	SpaceLabel     sql.NullString
+	LastTestAt     sql.NullString
+	LastTestStatus sql.NullString
+	CreatedAt      string
+	UpdatedAt      string
+}
+
+// Creates the single row (id 1) or replaces every column except id and
+// created_at.
+func (q *Queries) UpsertChatSettings(ctx context.Context, arg UpsertChatSettingsParams) (ChatSetting, error) {
+	row := q.db.QueryRowContext(ctx, upsertChatSettings,
+		arg.WebhookUrlCt,
+		arg.SpaceLabel,
+		arg.LastTestAt,
+		arg.LastTestStatus,
+		arg.CreatedAt,
+		arg.UpdatedAt,
+	)
+	var i ChatSetting
+	err := row.Scan(
+		&i.ID,
+		&i.WebhookUrlCt,
+		&i.SpaceLabel,
+		&i.LastTestAt,
+		&i.LastTestStatus,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const upsertHouseholdSettings = `-- name: UpsertHouseholdSettings :one
+INSERT INTO household_settings (
+	id, timezone, dinner_time, reminder_time, review_time, plan_draft_dow,
+	plan_draft_time, suggestions_dow, suggestions_time, chat_autosend_dow,
+	chat_autosend_time, onboarding_completed_at, updates_seen_at,
+	created_at, updated_at
+) VALUES (
+	1, ?, ?, ?, ?, ?,
+	?, ?, ?, ?,
+	?, ?, ?,
+	?, ?
+)
+ON CONFLICT (id) DO UPDATE SET
+	timezone = excluded.timezone,
+	dinner_time = excluded.dinner_time,
+	reminder_time = excluded.reminder_time,
+	review_time = excluded.review_time,
+	plan_draft_dow = excluded.plan_draft_dow,
+	plan_draft_time = excluded.plan_draft_time,
+	suggestions_dow = excluded.suggestions_dow,
+	suggestions_time = excluded.suggestions_time,
+	chat_autosend_dow = excluded.chat_autosend_dow,
+	chat_autosend_time = excluded.chat_autosend_time,
+	onboarding_completed_at = excluded.onboarding_completed_at,
+	updates_seen_at = excluded.updates_seen_at,
+	updated_at = excluded.updated_at
+RETURNING id, timezone, dinner_time, reminder_time, review_time, plan_draft_dow, plan_draft_time, suggestions_dow, suggestions_time, chat_autosend_dow, chat_autosend_time, onboarding_completed_at, updates_seen_at, created_at, updated_at
+`
+
+type UpsertHouseholdSettingsParams struct {
+	Timezone              string
+	DinnerTime            string
+	ReminderTime          string
+	ReviewTime            string
+	PlanDraftDow          int64
+	PlanDraftTime         string
+	SuggestionsDow        int64
+	SuggestionsTime       string
+	ChatAutosendDow       int64
+	ChatAutosendTime      string
+	OnboardingCompletedAt sql.NullString
+	UpdatesSeenAt         sql.NullString
+	CreatedAt             string
+	UpdatedAt             string
+}
+
+// Creates the single row (id 1) or replaces every column except id and
+// created_at.
+func (q *Queries) UpsertHouseholdSettings(ctx context.Context, arg UpsertHouseholdSettingsParams) (HouseholdSetting, error) {
+	row := q.db.QueryRowContext(ctx, upsertHouseholdSettings,
+		arg.Timezone,
+		arg.DinnerTime,
+		arg.ReminderTime,
+		arg.ReviewTime,
+		arg.PlanDraftDow,
+		arg.PlanDraftTime,
+		arg.SuggestionsDow,
+		arg.SuggestionsTime,
+		arg.ChatAutosendDow,
+		arg.ChatAutosendTime,
+		arg.OnboardingCompletedAt,
+		arg.UpdatesSeenAt,
+		arg.CreatedAt,
+		arg.UpdatedAt,
+	)
+	var i HouseholdSetting
+	err := row.Scan(
+		&i.ID,
+		&i.Timezone,
+		&i.DinnerTime,
+		&i.ReminderTime,
+		&i.ReviewTime,
+		&i.PlanDraftDow,
+		&i.PlanDraftTime,
+		&i.SuggestionsDow,
+		&i.SuggestionsTime,
+		&i.ChatAutosendDow,
+		&i.ChatAutosendTime,
+		&i.OnboardingCompletedAt,
+		&i.UpdatesSeenAt,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const upsertIntegrationsGoogle = `-- name: UpsertIntegrationsGoogle :one
+INSERT INTO integrations_google (
+	id, refresh_token_ct, calendar_id, calendar_name, connected_at,
+	last_sync_error, created_at, updated_at
+) VALUES (
+	1, ?, ?, ?, ?,
+	?, ?, ?
+)
+ON CONFLICT (id) DO UPDATE SET
+	refresh_token_ct = excluded.refresh_token_ct,
+	calendar_id = excluded.calendar_id,
+	calendar_name = excluded.calendar_name,
+	connected_at = excluded.connected_at,
+	last_sync_error = excluded.last_sync_error,
+	updated_at = excluded.updated_at
+RETURNING id, refresh_token_ct, calendar_id, calendar_name, connected_at, last_sync_error, created_at, updated_at
+`
+
+type UpsertIntegrationsGoogleParams struct {
+	RefreshTokenCt []byte
+	CalendarID     sql.NullString
+	CalendarName   sql.NullString
+	ConnectedAt    string
+	LastSyncError  sql.NullString
+	CreatedAt      string
+	UpdatedAt      string
+}
+
+// Creates the single row (id 1) or replaces every column except id and
+// created_at.
+func (q *Queries) UpsertIntegrationsGoogle(ctx context.Context, arg UpsertIntegrationsGoogleParams) (IntegrationsGoogle, error) {
+	row := q.db.QueryRowContext(ctx, upsertIntegrationsGoogle,
+		arg.RefreshTokenCt,
+		arg.CalendarID,
+		arg.CalendarName,
+		arg.ConnectedAt,
+		arg.LastSyncError,
+		arg.CreatedAt,
+		arg.UpdatedAt,
+	)
+	var i IntegrationsGoogle
+	err := row.Scan(
+		&i.ID,
+		&i.RefreshTokenCt,
+		&i.CalendarID,
+		&i.CalendarName,
+		&i.ConnectedAt,
+		&i.LastSyncError,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const upsertRecipeSearchSettings = `-- name: UpsertRecipeSearchSettings :one
+INSERT INTO recipe_search_settings (
+	id, provider, base_url, api_key_ct, created_at, updated_at
+) VALUES (
+	1, ?, ?, ?, ?, ?
+)
+ON CONFLICT (id) DO UPDATE SET
+	provider = excluded.provider,
+	base_url = excluded.base_url,
+	api_key_ct = excluded.api_key_ct,
+	updated_at = excluded.updated_at
+RETURNING id, provider, base_url, api_key_ct, created_at, updated_at
+`
+
+type UpsertRecipeSearchSettingsParams struct {
+	Provider  string
+	BaseUrl   sql.NullString
+	ApiKeyCt  []byte
+	CreatedAt string
+	UpdatedAt string
+}
+
+// Creates the single row (id 1) or replaces every column except id and
+// created_at.
+func (q *Queries) UpsertRecipeSearchSettings(ctx context.Context, arg UpsertRecipeSearchSettingsParams) (RecipeSearchSetting, error) {
+	row := q.db.QueryRowContext(ctx, upsertRecipeSearchSettings,
+		arg.Provider,
+		arg.BaseUrl,
+		arg.ApiKeyCt,
+		arg.CreatedAt,
+		arg.UpdatedAt,
+	)
+	var i RecipeSearchSetting
+	err := row.Scan(
+		&i.ID,
+		&i.Provider,
+		&i.BaseUrl,
+		&i.ApiKeyCt,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}

internal/secureurl/secureurl.go

@@ -0,0 +1,32 @@
+// Package secureurl holds the one transport rule for URLs that carry
+// credentials or session cookies: HTTPS, or plain HTTP to a loopback host for
+// local development and tests.
+package secureurl
+
+import (
+	"errors"
+	"fmt"
+	"net/url"
+	"strings"
+)
+
+// loopbackHosts are the only hosts plain HTTP is allowed for, compared
+// case-insensitively. url.URL's Hostname strips the brackets from "[::1]".
+var loopbackHosts = map[string]bool{"localhost": true, "127.0.0.1": true, "::1": true}
+
+// Check reports an error unless u is an absolute https:// URL, or an http://
+// URL whose host is localhost, 127.0.0.1 or ::1.
+func Check(u *url.URL) error {
+	switch {
+	case u.Hostname() == "":
+		return errors.New("URL has no host")
+	case u.Scheme == "https":
+		return nil
+	case u.Scheme == "http" && loopbackHosts[strings.ToLower(u.Hostname())]:
+		return nil
+	case u.Scheme == "http":
+		return errors.New("plain http:// is allowed only for localhost, 127.0.0.1 or [::1]; use https://")
+	default:
+		return fmt.Errorf("unsupported scheme %q (want https://)", u.Scheme)
+	}
+}

internal/secureurl/secureurl_test.go

@@ -0,0 +1,40 @@
+package secureurl
+
+import (
+	"net/url"
+	"testing"
+)
+
+func TestCheck(t *testing.T) {
+	t.Parallel()
+	tests := []struct {
+		raw string
+		ok  bool
+	}{
+		{"https://meals.example.com", true},
+		{"https://auth.example.com/application/o/mealquest/", true},
+		{"https://192.0.2.10:8443", true},
+		{"http://localhost:8080", true},
+		{"http://LOCALHOST:8080", true},
+		{"http://127.0.0.1:8080/path", true},
+		{"http://[::1]:8080", true},
+		{"http://[::1]", true},
+		{"http://meals.example.com", false},
+		{"http://192.0.2.10", false},
+		{"http://127.0.0.2", false},
+		{"http://localhost.example.com", false},
+		{"http://0.0.0.0:8080", false},
+		{"ftp://localhost", false},
+		{"https://", false},
+		{"meals.example.com", false},
+	}
+	for _, tc := range tests {
+		u, err := url.Parse(tc.raw)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if err := Check(u); (err == nil) != tc.ok {
+			t.Errorf("Check(%q) error = %v, want ok=%v", tc.raw, err, tc.ok)
+		}
+	}
+}

internal/server/server.go

@@ -16,9 +16,16 @@ import (
 // SPA's index.html.
 var reservedPrefixes = []string{"/api", "/auth", "/media", "/health"}
 
+// RouteMounter registers its own routes on the router.
+type RouteMounter interface {
+	Mount(r chi.Router)
+}
+
 // NewRouter returns the HTTP handler for the service. version is reported by
-// GET /health; assets is the web build served for every other GET.
-func NewRouter(logger *slog.Logger, version string, assets fs.FS) (http.Handler, error) {
+// GET /health; auth mounts the /auth routes; sessions guards /api/v1 and
+// /media; assets is the web build served for every other GET. /health, /auth
+// and the web build are public.
+func NewRouter(logger *slog.Logger, version string, auth RouteMounter, sessions SessionLookup, assets fs.FS) (http.Handler, error) {
 	notFound := apiErrorHandler(logger, http.StatusNotFound, "not_found", "not found")
 	methodNotAllowed := apiErrorHandler(logger, http.StatusMethodNotAllowed, "method_not_allowed", "method not allowed")
 
@@ -32,12 +39,24 @@ func NewRouter(logger *slog.Logger, version string, assets fs.FS) (http.Handler,
 	r.NotFound(notFound)
 
 	r.Get("/health", health(logger, version))
+	auth.Mount(r)
+	// The session middleware wraps the whole /api/v1 and /media subrouters
+	// rather than being added with Use: chi skips a subrouter's middleware
+	// when it has no routes, which would leave it unguarded.
+	signedIn := requireSession(logger, sessions)
+	apiV1, media := chi.NewRouter(), chi.NewRouter()
+	for _, sub := range []*chi.Mux{apiV1, media} {
+		sub.MethodNotAllowed(methodNotAllowed)
+		sub.NotFound(notFound)
+	}
 	r.Route("/api", func(r chi.Router) {
 		r.MethodNotAllowed(methodNotAllowed)
 		r.NotFound(notFound)
+		r.Mount("/v1", signedIn(apiV1))
 	})
-	// Catch-all for the PWA. /auth and /media have no routes yet; the frontend
-	// handler passes them to notFound rather than the SPA fallback.
+	r.Mount("/media", signedIn(media))
+	// Catch-all for the PWA. Unknown /auth paths reach the frontend handler,
+	// which passes them to notFound rather than the SPA fallback.
 	r.Method(http.MethodGet, "/*", web)
 	r.Method(http.MethodHead, "/*", web)
 	return r, nil

internal/server/server_test.go

@@ -10,6 +10,8 @@ import (
 	"strings"
 	"testing"
 	"testing/fstest"
+
+	"github.com/go-chi/chi/v5"
 )
 
 const (
@@ -25,13 +27,39 @@ func newTestRouter(t *testing.T, version string) http.Handler {
 		"index.html":             {Data: []byte(fixtureIndex)},
 		"assets/index-AbC123.js": {Data: []byte(fixtureAsset)},
 	}
-	r, err := NewRouter(logger, version, assets)
+	r, err := NewRouter(logger, version, stubAuth{}, stubSessions{}, assets)
 	if err != nil {
 		t.Fatal(err)
 	}
 	return r
 }
 
+// stubAuth mounts a fixed GET /auth/login in place of the real auth flow.
+type stubAuth struct{}
+
+func (stubAuth) Mount(r chi.Router) {
+	r.Get("/auth/login", func(w http.ResponseWriter, _ *http.Request) {
+		io.WriteString(w, "stub login")
+	})
+}
+
+func TestAuthRoutesMounted(t *testing.T) {
+	t.Parallel()
+
+	router := newTestRouter(t, "dev")
+	rec := httptest.NewRecorder()
+	router.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, "/auth/login", nil))
+	if rec.Code != http.StatusOK || rec.Body.String() != "stub login" {
+		t.Errorf("GET /auth/login = %d %q, want the mounted handler", rec.Code, rec.Body.String())
+	}
+
+	rec = httptest.NewRecorder()
+	router.ServeHTTP(rec, httptest.NewRequest(http.MethodPost, "/auth/login", nil))
+	if rec.Code != http.StatusMethodNotAllowed {
+		t.Errorf("POST /auth/login status = %d, want 405", rec.Code)
+	}
+}
+
 func TestHealth(t *testing.T) {
 	t.Parallel()
 
@@ -98,8 +126,10 @@ func TestReservedPathsNotFound(t *testing.T) {
 	}{
 		{http.MethodGet, "/api"},
 		{http.MethodGet, "/api/unknown"},
+		{http.MethodGet, "/api/v1/unknown"},
+		{http.MethodPost, "/api/v1/unknown"},
 		{http.MethodPost, "/api/unknown"},
-		{http.MethodGet, "/auth/callback"},
+		{http.MethodGet, "/auth/unknown"},
 		{http.MethodGet, "/media/photo.jpg"},
 		{http.MethodGet, "/health/deep"},
 		{http.MethodGet, "/auth/../quests/42"},
@@ -109,8 +139,11 @@ func TestReservedPathsNotFound(t *testing.T) {
 		t.Run(tt.method+" "+tt.path, func(t *testing.T) {
 			t.Parallel()
 
+			// Signed in, so /api/v1 and /media reach their routers.
+			req := httptest.NewRequest(tt.method, tt.path, nil)
+			req.AddCookie(validSessionCookie)
 			rec := httptest.NewRecorder()
-			router.ServeHTTP(rec, httptest.NewRequest(tt.method, tt.path, nil))
+			router.ServeHTTP(rec, req)
 
 			if rec.Code != http.StatusNotFound {
 				t.Errorf("status = %d, want 404", rec.Code)

internal/server/session.go

@@ -0,0 +1,37 @@
+package server
+
+import (
+	"errors"
+	"log/slog"
+	"net/http"
+
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/auth"
+)
+
+// SessionLookup finds the live session a request carries; it returns
+// auth.ErrNoSession when there is none. *auth.SessionManager implements it.
+type SessionLookup interface {
+	SessionFor(r *http.Request) (auth.Session, error)
+}
+
+// requireSession is the RequireSession middleware. It passes requests with a
+// live session to next with the session's actor in the context (read it with
+// auth.ActorFrom); others get 401 unauthenticated.
+func requireSession(logger *slog.Logger, sessions SessionLookup) func(http.Handler) http.Handler {
+	unauthenticated := apiErrorHandler(logger, http.StatusUnauthorized, "unauthenticated", "sign in required")
+	internal := apiErrorHandler(logger, http.StatusInternalServerError, "internal", "internal error")
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			s, err := sessions.SessionFor(r)
+			switch {
+			case errors.Is(err, auth.ErrNoSession):
+				unauthenticated(w, r)
+			case err != nil:
+				logger.ErrorContext(r.Context(), "look up session", "error", err)
+				internal(w, r)
+			default:
+				next.ServeHTTP(w, r.WithContext(auth.WithActor(r.Context(), s.Actor())))
+			}
+		})
+	}
+}

internal/server/session_test.go

@@ -0,0 +1,151 @@
+package server
+
+import (
+	"errors"
+	"io"
+	"log/slog"
+	"net/http"
+	"net/http/httptest"
+	"slices"
+	"testing"
+
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/auth"
+)
+
+const (
+	unauthenticatedJSON = `{"error":{"code":"unauthenticated","message":"sign in required","retryable":false}}`
+	internalJSON        = `{"error":{"code":"internal","message":"internal error","retryable":false}}`
+)
+
+var (
+	validSessionCookie  = &http.Cookie{Name: auth.SessionCookieName, Value: "valid"}
+	brokenSessionCookie = &http.Cookie{Name: auth.SessionCookieName, Value: "broken"}
+	testSession         = auth.Session{
+		Subject: "user-123",
+		Email:   "cook@example.com",
+		Name:    "Home Cook",
+		Groups:  []string{"mealquest-admin"},
+	}
+)
+
+// stubSessions knows one valid session cookie; the broken cookie fails the
+// lookup as a database error would.
+type stubSessions struct{}
+
+func (stubSessions) SessionFor(r *http.Request) (auth.Session, error) {
+	c, err := r.Cookie(auth.SessionCookieName)
+	switch {
+	case err != nil:
+		return auth.Session{}, auth.ErrNoSession
+	case c.Value == validSessionCookie.Value:
+		return testSession, nil
+	case c.Value == brokenSessionCookie.Value:
+		return auth.Session{}, errors.New("database down")
+	default:
+		return auth.Session{}, auth.ErrNoSession
+	}
+}
+
+func TestProtectedPathsRequireSession(t *testing.T) {
+	t.Parallel()
+
+	router := newTestRouter(t, "dev")
+	for _, tc := range []struct {
+		method, path string
+		cookie       *http.Cookie
+	}{
+		{http.MethodGet, "/api/v1/settings/household", nil},
+		{http.MethodPatch, "/api/v1/settings/household", nil},
+		{http.MethodGet, "/api/v1", nil},
+		{http.MethodGet, "/media/photo.jpg", nil},
+		{http.MethodGet, "/api/v1/settings/household", &http.Cookie{Name: auth.SessionCookieName, Value: "unknown"}},
+	} {
+		t.Run(tc.method+" "+tc.path, func(t *testing.T) {
+			t.Parallel()
+			req := httptest.NewRequest(tc.method, tc.path, nil)
+			if tc.cookie != nil {
+				req.AddCookie(tc.cookie)
+			}
+			rec := httptest.NewRecorder()
+			router.ServeHTTP(rec, req)
+
+			if rec.Code != http.StatusUnauthorized {
+				t.Errorf("status = %d, want 401", rec.Code)
+			}
+			if ct := rec.Header().Get("Content-Type"); ct != "application/json" {
+				t.Errorf("Content-Type = %q, want application/json", ct)
+			}
+			if got := rec.Body.String(); got != unauthenticatedJSON {
+				t.Errorf("body = %s, want %s", got, unauthenticatedJSON)
+			}
+		})
+	}
+}
+
+func TestPublicPathsNeedNoSession(t *testing.T) {
+	t.Parallel()
+
+	router := newTestRouter(t, "dev")
+	for _, path := range []string{"/health", "/auth/login", "/", "/assets/index-AbC123.js", "/quests/42"} {
+		t.Run(path, func(t *testing.T) {
+			t.Parallel()
+			rec := httptest.NewRecorder()
+			router.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, path, nil))
+			if rec.Code != http.StatusOK {
+				t.Errorf("GET %s without a cookie = %d, want 200", path, rec.Code)
+			}
+		})
+	}
+}
+
+func TestSessionLookupFailure(t *testing.T) {
+	t.Parallel()
+
+	req := httptest.NewRequest(http.MethodGet, "/api/v1/settings/household", nil)
+	req.AddCookie(brokenSessionCookie)
+	rec := httptest.NewRecorder()
+	newTestRouter(t, "dev").ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusInternalServerError || rec.Body.String() != internalJSON {
+		t.Errorf("response = %d %s, want 500 %s", rec.Code, rec.Body.String(), internalJSON)
+	}
+}
+
+func TestRequireSessionAttachesActor(t *testing.T) {
+	t.Parallel()
+
+	var got auth.Actor
+	var ok bool
+	next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		got, ok = auth.ActorFrom(r.Context())
+		w.WriteHeader(http.StatusNoContent)
+	})
+	h := requireSession(slog.New(slog.NewTextHandler(io.Discard, nil)), stubSessions{})(next)
+
+	req := httptest.NewRequest(http.MethodGet, "/api/v1/settings/household", nil)
+	req.AddCookie(validSessionCookie)
+	rec := httptest.NewRecorder()
+	h.ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusNoContent {
+		t.Fatalf("status = %d, want the handler's 204", rec.Code)
+	}
+	if !ok || got.Subject != "user-123" || got.Email != "cook@example.com" || got.Name != "Home Cook" ||
+		!slices.Equal(got.Groups, []string{"mealquest-admin"}) {
+		t.Errorf("actor = %+v (ok=%v), want the session's household member", got, ok)
+	}
+}
+
+func TestRequireSessionStopsUnauthenticated(t *testing.T) {
+	t.Parallel()
+
+	called := false
+	next := http.HandlerFunc(func(http.ResponseWriter, *http.Request) { called = true })
+	h := requireSession(slog.New(slog.NewTextHandler(io.Discard, nil)), stubSessions{})(next)
+	rec := httptest.NewRecorder()
+	h.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, "/api/v1/settings/household", nil))
+
+	if called || rec.Code != http.StatusUnauthorized {
+		t.Errorf("handler called = %v, status = %d; want not called and 401", called, rec.Code)
+	}
+}

internal/store/id.go

@@ -0,0 +1,27 @@
+package store
+
+import (
+	"crypto/rand"
+	"sync"
+	"time"
+
+	"github.com/oklog/ulid/v2"
+)
+
+var (
+	idMu      sync.Mutex
+	idEntropy = ulid.Monotonic(rand.Reader, 0)
+	idLastMS  uint64
+)
+
+// NewID returns a new ULID as its canonical 26-character string. IDs from
+// this process sort strictly in creation order, including within one
+// millisecond and across a backwards wall-clock step. It panics if the
+// monotonic entropy overflows within a millisecond.
+func NewID() string {
+	idMu.Lock()
+	defer idMu.Unlock()
+	ms := max(ulid.Timestamp(time.Now()), idLastMS)
+	idLastMS = ms
+	return ulid.MustNew(ms, idEntropy).String()
+}

internal/store/id_test.go

@@ -0,0 +1,25 @@
+package store
+
+import (
+	"testing"
+
+	"github.com/oklog/ulid/v2"
+)
+
+func TestNewIDStrictlyIncreasing(t *testing.T) {
+	const n = 10000
+	prev := NewID()
+	for range n {
+		id := NewID()
+		if len(id) != ulid.EncodedSize {
+			t.Fatalf("NewID() = %q, want %d characters", id, ulid.EncodedSize)
+		}
+		if _, err := ulid.ParseStrict(id); err != nil {
+			t.Fatalf("NewID() = %q: %v", id, err)
+		}
+		if id <= prev {
+			t.Fatalf("NewID() = %q, not after previous %q", id, prev)
+		}
+		prev = id
+	}
+}

internal/store/migrate.go

@@ -0,0 +1,105 @@
+package store
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"io/fs"
+	"strings"
+	"time"
+)
+
+const createSchemaMigrations = `CREATE TABLE IF NOT EXISTS schema_migrations (
+	version    TEXT PRIMARY KEY,
+	applied_at TEXT NOT NULL
+)`
+
+// Migrate applies every *.sql file at the root of migrations that is not yet
+// recorded in schema_migrations, in filename order. Each migration runs in its
+// own transaction together with the insert that records it, so a failing
+// migration leaves the database at the previous version. A version is the
+// file name without its .sql extension.
+//
+// The database must not hold a version unknown to migrations: that means it
+// was migrated by a newer build, and Migrate refuses to continue.
+func Migrate(ctx context.Context, db *sql.DB, migrations fs.FS) error {
+	files, err := fs.Glob(migrations, "*.sql")
+	if err != nil {
+		return fmt.Errorf("migrate: list migrations: %w", err)
+	}
+	if len(files) == 0 {
+		return fmt.Errorf("migrate: no migrations found")
+	}
+
+	if _, err := db.ExecContext(ctx, createSchemaMigrations); err != nil {
+		return fmt.Errorf("migrate: create schema_migrations: %w", err)
+	}
+	applied, err := appliedVersions(ctx, db)
+	if err != nil {
+		return err
+	}
+
+	known := make(map[string]bool, len(files))
+	for _, name := range files {
+		known[strings.TrimSuffix(name, ".sql")] = true
+	}
+	for version := range applied {
+		if !known[version] {
+			return fmt.Errorf("migrate: database has version %q, which this build does not know", version)
+		}
+	}
+
+	for _, name := range files { // fs.Glob returns names in lexical order
+		version := strings.TrimSuffix(name, ".sql")
+		if applied[version] {
+			continue
+		}
+		body, err := fs.ReadFile(migrations, name)
+		if err != nil {
+			return fmt.Errorf("migrate: read %s: %w", name, err)
+		}
+		if err := apply(ctx, db, version, string(body)); err != nil {
+			return fmt.Errorf("migrate: apply %s: %w", name, err)
+		}
+	}
+	return nil
+}
+
+func appliedVersions(ctx context.Context, db *sql.DB) (map[string]bool, error) {
+	rows, err := db.QueryContext(ctx, `SELECT version FROM schema_migrations`)
+	if err != nil {
+		return nil, fmt.Errorf("migrate: read schema_migrations: %w", err)
+	}
+	defer rows.Close()
+	applied := make(map[string]bool)
+	for rows.Next() {
+		var v string
+		if err := rows.Scan(&v); err != nil {
+			return nil, fmt.Errorf("migrate: read schema_migrations: %w", err)
+		}
+		applied[v] = true
+	}
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("migrate: read schema_migrations: %w", err)
+	}
+	return applied, nil
+}
+
+func apply(ctx context.Context, db *sql.DB, version, body string) error {
+	tx, err := db.BeginTx(ctx, nil)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback() // no-op once committed
+
+	if _, err := tx.ExecContext(ctx, body); err != nil {
+		return err
+	}
+	if _, err := tx.ExecContext(ctx,
+		`INSERT INTO schema_migrations (version, applied_at) VALUES (?, ?)`,
+		version, time.Now().UTC().Format(time.RFC3339),
+	); err != nil {
+		return err
+	}
+	return tx.Commit()
+}

internal/store/migrate_test.go

@@ -0,0 +1,263 @@
+package store
+
+import (
+	"context"
+	"io/fs"
+	"slices"
+	"strings"
+	"testing"
+	"testing/fstest"
+	"time"
+
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/migrations"
+)
+
+var testMigrations = fstest.MapFS{
+	"0001_first.sql":  {Data: []byte("CREATE TABLE first (id INTEGER PRIMARY KEY);")},
+	"0002_second.sql": {Data: []byte("CREATE TABLE second (id INTEGER PRIMARY KEY);\nCREATE TABLE third (id INTEGER PRIMARY KEY);")},
+	"README.md":       {Data: []byte("not a migration")},
+}
+
+type migrationRow struct {
+	version   string
+	appliedAt string
+}
+
+func migrationRows(t *testing.T, s *Store) []migrationRow {
+	t.Helper()
+	rows, err := s.Reader.Query("SELECT version, applied_at FROM schema_migrations ORDER BY version")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer rows.Close()
+	var out []migrationRow
+	for rows.Next() {
+		var r migrationRow
+		if err := rows.Scan(&r.version, &r.appliedAt); err != nil {
+			t.Fatal(err)
+		}
+		out = append(out, r)
+	}
+	if err := rows.Err(); err != nil {
+		t.Fatal(err)
+	}
+	return out
+}
+
+func versions(rows []migrationRow) string {
+	vs := make([]string, len(rows))
+	for i, r := range rows {
+		vs[i] = r.version
+	}
+	return strings.Join(vs, ",")
+}
+
+func tableExists(t *testing.T, s *Store, name string) bool {
+	t.Helper()
+	var n int
+	if err := s.Reader.QueryRow("SELECT count(*) FROM sqlite_schema WHERE type = 'table' AND name = ?", name).Scan(&n); err != nil {
+		t.Fatal(err)
+	}
+	return n == 1
+}
+
+func TestMigrateFreshDatabaseReachesLatest(t *testing.T) {
+	s := openTestStore(t)
+	if err := Migrate(context.Background(), s.Writer, testMigrations); err != nil {
+		t.Fatal(err)
+	}
+	rows := migrationRows(t, s)
+	if got := versions(rows); got != "0001_first,0002_second" {
+		t.Fatalf("versions = %q", got)
+	}
+	for _, r := range rows {
+		if _, err := time.Parse(time.RFC3339, r.appliedAt); err != nil || !strings.HasSuffix(r.appliedAt, "Z") {
+			t.Errorf("applied_at %q is not UTC RFC 3339", r.appliedAt)
+		}
+	}
+	for _, table := range []string{"first", "second", "third"} {
+		if !tableExists(t, s, table) {
+			t.Errorf("table %s missing", table)
+		}
+	}
+}
+
+func TestMigrateSecondRunIsNoOp(t *testing.T) {
+	ctx := context.Background()
+	s := openTestStore(t)
+	if err := Migrate(ctx, s.Writer, testMigrations); err != nil {
+		t.Fatal(err)
+	}
+	before := migrationRows(t, s)
+	if err := Migrate(ctx, s.Writer, testMigrations); err != nil {
+		t.Fatalf("second run: %v", err)
+	}
+	after := migrationRows(t, s)
+	if len(after) != len(before) {
+		t.Fatalf("rows after second run = %v, want %v", after, before)
+	}
+	for i := range before {
+		if after[i] != before[i] {
+			t.Errorf("row %d changed: %v -> %v", i, before[i], after[i])
+		}
+	}
+}
+
+func TestMigrateBrokenMigrationRollsBack(t *testing.T) {
+	ctx := context.Background()
+	s := openTestStore(t)
+	if err := Migrate(ctx, s.Writer, testMigrations); err != nil {
+		t.Fatal(err)
+	}
+
+	broken := fstest.MapFS{"0003_broken.sql": {Data: []byte(
+		// The first statement succeeds; the second is invalid, so the
+		// table created by the first must be rolled back with it.
+		"CREATE TABLE fourth (id INTEGER PRIMARY KEY);\nCREATE TABLE oops (;",
+	)}}
+	for name, f := range testMigrations {
+		broken[name] = f
+	}
+	err := Migrate(ctx, s.Writer, broken)
+	if err == nil {
+		t.Fatal("broken migration returned no error")
+	}
+	if !strings.Contains(err.Error(), "0003_broken.sql") {
+		t.Errorf("error %q does not name the failing migration", err)
+	}
+	if got := versions(migrationRows(t, s)); got != "0001_first,0002_second" {
+		t.Errorf("versions after failure = %q, want previous version intact", got)
+	}
+	if tableExists(t, s, "fourth") {
+		t.Error("table from the failed migration was not rolled back")
+	}
+	for _, table := range []string{"first", "second", "third"} {
+		if !tableExists(t, s, table) {
+			t.Errorf("previous table %s missing after failed migration", table)
+		}
+	}
+}
+
+func TestMigrateAppliesInFilenameOrder(t *testing.T) {
+	s := openTestStore(t)
+	// 0002 depends on 0001; MapFS iteration order is random, so this only
+	// passes if migrations are sorted by name.
+	ordered := fstest.MapFS{
+		"0002_child.sql":  {Data: []byte("CREATE TABLE child (parent_id INTEGER REFERENCES parent(id)); INSERT INTO child VALUES (1);")},
+		"0001_parent.sql": {Data: []byte("CREATE TABLE parent (id INTEGER PRIMARY KEY); INSERT INTO parent VALUES (1);")},
+	}
+	if err := Migrate(context.Background(), s.Writer, ordered); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestMigrateUnknownAppliedVersionFails(t *testing.T) {
+	ctx := context.Background()
+	s := openTestStore(t)
+	if err := Migrate(ctx, s.Writer, testMigrations); err != nil {
+		t.Fatal(err)
+	}
+	older := fstest.MapFS{"0001_first.sql": testMigrations["0001_first.sql"]}
+	if err := Migrate(ctx, s.Writer, older); err == nil {
+		t.Fatal("migrating a database newer than the build returned no error")
+	}
+}
+
+func TestMigrateNoMigrationsFails(t *testing.T) {
+	s := openTestStore(t)
+	if err := Migrate(context.Background(), s.Writer, fstest.MapFS{}); err == nil {
+		t.Fatal("empty migrations returned no error")
+	}
+}
+
+func TestMigrateEmbeddedMigrations(t *testing.T) {
+	s := openTestStore(t)
+	if err := Migrate(context.Background(), s.Writer, migrations.FS); err != nil {
+		t.Fatal(err)
+	}
+	if got := versions(migrationRows(t, s)); got != "0000_bootstrap,0001_init" {
+		t.Errorf("versions = %q, want 0000_bootstrap,0001_init", got)
+	}
+}
+
+func TestMigrateBootstrapThenEmbeddedInitApplies(t *testing.T) {
+	ctx := context.Background()
+	s := openTestStore(t)
+	bootstrap, err := fs.ReadFile(migrations.FS, "0000_bootstrap.sql")
+	if err != nil {
+		t.Fatal(err)
+	}
+	// A database migrated by the bootstrap-only build upgrades to the
+	// embedded set, which adds 0001_init.sql alongside the unchanged bootstrap.
+	if err := Migrate(ctx, s.Writer, fstest.MapFS{"0000_bootstrap.sql": {Data: bootstrap}}); err != nil {
+		t.Fatal(err)
+	}
+	if err := Migrate(ctx, s.Writer, migrations.FS); err != nil {
+		t.Fatal(err)
+	}
+	if got := versions(migrationRows(t, s)); got != "0000_bootstrap,0001_init" {
+		t.Errorf("versions = %q, want 0000_bootstrap,0001_init", got)
+	}
+	if !tableExists(t, s, "dinners") {
+		t.Error("table from 0001_init was not created")
+	}
+}
+
+// schemaSQL returns every schema object's definition, so a test can prove a
+// later Migrate created or altered nothing.
+func schemaSQL(t *testing.T, s *Store) []string {
+	t.Helper()
+	rows, err := s.Reader.Query("SELECT type || ' ' || name || ': ' || coalesce(sql, '') FROM sqlite_schema ORDER BY type, name")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer rows.Close()
+	var out []string
+	for rows.Next() {
+		var def string
+		if err := rows.Scan(&def); err != nil {
+			t.Fatal(err)
+		}
+		out = append(out, def)
+	}
+	if err := rows.Err(); err != nil {
+		t.Fatal(err)
+	}
+	return out
+}
+
+func TestMigrateReopenSameDataDirIsNoOp(t *testing.T) {
+	ctx := context.Background()
+	dir := t.TempDir()
+
+	first, err := Open(ctx, dir)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := Migrate(ctx, first.Writer, migrations.FS); err != nil {
+		t.Fatal(err)
+	}
+	before, beforeSchema := migrationRows(t, first), schemaSQL(t, first)
+	if err := first.Close(); err != nil {
+		t.Fatal(err)
+	}
+
+	second, err := Open(ctx, dir)
+	if err != nil {
+		t.Fatalf("reopen: %v", err)
+	}
+	t.Cleanup(func() {
+		if err := second.Close(); err != nil {
+			t.Error(err)
+		}
+	})
+	if err := Migrate(ctx, second.Writer, migrations.FS); err != nil {
+		t.Fatalf("migrate after reopen: %v", err)
+	}
+	if after := migrationRows(t, second); !slices.Equal(after, before) {
+		t.Errorf("schema_migrations changed on reopen:\n got %v\nwant %v", after, before)
+	}
+	if afterSchema := schemaSQL(t, second); !slices.Equal(afterSchema, beforeSchema) {
+		t.Errorf("schema changed on reopen:\n got %v\nwant %v", afterSchema, beforeSchema)
+	}
+}

internal/store/repository_test.go

@@ -0,0 +1,177 @@
+package store
+
+import (
+	"context"
+	"fmt"
+	"maps"
+	"reflect"
+	"slices"
+	"strings"
+	"testing"
+)
+
+// The tables below have no public sqlc queries yet (they arrive with the
+// planning, suggestion and Supply run features), so these tests drive them
+// with raw SQL to prove the schema stores, returns and updates their rows.
+
+const repoTime = "2026-10-03T12:00:00Z"
+
+type repoRow struct {
+	table string
+	cols  map[string]any
+}
+
+// repoParents are the rows the tables under test reference, in insert order.
+var repoParents = map[string]repoRow{
+	"dinners": {"dinners", map[string]any{
+		"id": "dinner-1", "name": "Chili", "normalized_name": "chili",
+		"status": "regular", "origin": "regular", "is_favorite": int64(0),
+		"grounding_status": "manual", "created_at": repoTime, "updated_at": repoTime,
+	}},
+	"suggestion_batches": {"suggestion_batches", map[string]any{
+		"id": "batch-1", "trigger": "manual", "status": "done",
+		"created_at": repoTime, "updated_at": repoTime,
+	}},
+	"week_plans": {"week_plans", map[string]any{
+		"id": "plan-1", "week_start": "2026-10-05", "status": "draft",
+		"created_at": repoTime, "updated_at": repoTime,
+	}},
+	"shopping_lists": {"shopping_lists", map[string]any{
+		"id": "list-1", "week_start": "2026-10-05", "plan_id": "plan-1",
+		"title": "Supply run", "status": "current",
+		"created_at": repoTime, "updated_at": repoTime,
+	}},
+	"shopping_groups": {"shopping_groups", map[string]any{
+		"id": "group-1", "list_id": "list-1", "dinner_id": "dinner-1",
+		"position": int64(0), "created_at": repoTime, "updated_at": repoTime,
+	}},
+}
+
+// readRepoRow reads cols of the row with id through the reader.
+func readRepoRow(t *testing.T, s *Store, table, id string, cols []string) map[string]any {
+	t.Helper()
+	quoted := make([]string, len(cols))
+	vals := make([]any, len(cols))
+	ptrs := make([]any, len(cols))
+	for i, c := range cols {
+		quoted[i] = `"` + c + `"`
+		ptrs[i] = &vals[i]
+	}
+	q := fmt.Sprintf(`SELECT %s FROM "%s" WHERE id = ?`, strings.Join(quoted, ", "), table)
+	if err := s.Reader.QueryRowContext(context.Background(), q, id).Scan(ptrs...); err != nil {
+		t.Fatalf("read %s %s: %v", table, id, err)
+	}
+	got := make(map[string]any, len(cols))
+	for i, c := range cols {
+		got[c] = vals[i]
+	}
+	return got
+}
+
+func TestRepositoryInsertReadUpdate(t *testing.T) {
+	cases := []struct {
+		parents []string
+		row     repoRow
+		update  map[string]any
+	}{
+		{
+			row: repoRow{"week_plans", map[string]any{
+				"id": "plan-2", "week_start": "2026-10-12", "status": "draft",
+				"ai_note": "Two Side quests this week.", "ai_run_id": nil, "calendar_synced_at": nil,
+				"created_at": repoTime, "updated_at": repoTime,
+			}},
+			update: map[string]any{"status": "synced", "calendar_synced_at": "2026-10-04T09:00:00Z"},
+		},
+		{
+			parents: []string{"dinners", "week_plans"},
+			row: repoRow{"plan_days", map[string]any{
+				"id": "day-1", "plan_id": "plan-1", "date": "2026-10-06", "dinner_id": "dinner-1",
+				"is_new": int64(0), "calendar_event_id": nil,
+				"created_at": repoTime, "updated_at": repoTime,
+			}},
+			update: map[string]any{"dinner_id": nil, "calendar_event_id": "evt-123"},
+		},
+		{
+			parents: []string{"dinners", "suggestion_batches"},
+			row: repoRow{"suggestions", map[string]any{
+				"id": "sugg-1", "dinner_id": "dinner-1", "batch_id": "batch-1",
+				"reason": "You make chili often.", "cited_regular_ids": `["dinner-1"]`,
+				"status": "pending", "decided_at": nil,
+				"created_at": repoTime, "updated_at": repoTime,
+			}},
+			update: map[string]any{"status": "accepted", "decided_at": "2026-10-04T10:00:00Z"},
+		},
+		{
+			parents: []string{"week_plans"},
+			row: repoRow{"shopping_lists", map[string]any{
+				"id": "list-2", "week_start": "2026-10-05", "plan_id": "plan-1",
+				"title": "Supply run", "status": "current", "sent_to_chat_at": nil, "frozen_at": nil,
+				"created_at": repoTime, "updated_at": repoTime,
+			}},
+			update: map[string]any{"status": "archived", "frozen_at": "2026-10-12T00:00:00Z"},
+		},
+		{
+			parents: []string{"dinners", "week_plans", "shopping_lists"},
+			row: repoRow{"shopping_groups", map[string]any{
+				"id": "group-2", "list_id": "list-1", "dinner_id": "dinner-1", "position": int64(0),
+				"created_at": repoTime, "updated_at": repoTime,
+			}},
+			update: map[string]any{"position": int64(3)},
+		},
+		{
+			parents: []string{"dinners", "week_plans", "shopping_lists", "shopping_groups"},
+			row: repoRow{"shopping_items", map[string]any{
+				"id": "item-1", "group_id": "group-1", "name": "Onion", "qty": "2",
+				"needed": int64(1), "position": int64(0),
+				"created_at": repoTime, "updated_at": repoTime,
+			}},
+			update: map[string]any{"needed": int64(0), "qty": "3"},
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.row.table, func(t *testing.T) {
+			ctx := context.Background()
+			s := migratedStore(t)
+			for _, p := range tc.parents {
+				parent := repoParents[p]
+				if err := insertSchemaRow(s.Writer, parent.table, parent.cols); err != nil {
+					t.Fatalf("seed %s: %v", p, err)
+				}
+			}
+
+			table, id := tc.row.table, tc.row.cols["id"].(string)
+			cols := slices.Sorted(maps.Keys(tc.row.cols))
+
+			if err := insertSchemaRow(s.Writer, table, tc.row.cols); err != nil {
+				t.Fatalf("insert: %v", err)
+			}
+			if got := readRepoRow(t, s, table, id, cols); !reflect.DeepEqual(got, tc.row.cols) {
+				t.Fatalf("read after insert:\n got %v\nwant %v", got, tc.row.cols)
+			}
+
+			want := maps.Clone(tc.row.cols)
+			maps.Copy(want, tc.update)
+			want["updated_at"] = "2026-10-04T12:00:00Z"
+			setCols := slices.Sorted(maps.Keys(tc.update))
+			sets := make([]string, 0, len(setCols)+1)
+			args := make([]any, 0, len(setCols)+2)
+			for _, c := range append(setCols, "updated_at") {
+				sets = append(sets, `"`+c+`" = ?`)
+				args = append(args, want[c])
+			}
+			args = append(args, id)
+			q := fmt.Sprintf(`UPDATE "%s" SET %s WHERE id = ?`, table, strings.Join(sets, ", "))
+			res, err := s.Writer.ExecContext(ctx, q, args...)
+			if err != nil {
+				t.Fatalf("update: %v", err)
+			}
+			if n, err := res.RowsAffected(); err != nil || n != 1 {
+				t.Fatalf("update affected %d rows (err %v), want 1", n, err)
+			}
+			if got := readRepoRow(t, s, table, id, cols); !reflect.DeepEqual(got, want) {
+				t.Fatalf("read after update:\n got %v\nwant %v", got, want)
+			}
+		})
+	}
+}

internal/store/schema_test.go

@@ -0,0 +1,556 @@
+package store
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"slices"
+	"strings"
+	"testing"
+
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/migrations"
+)
+
+// schemaTables is every table in the v1 data model, in insert order: parents
+// before the children that reference them.
+var schemaTables = []string{
+	"ai_runs",
+	"recipes",
+	"recipe_ingredients",
+	"recipe_steps",
+	"photos",
+	"dinners",
+	"suggestion_batches",
+	"suggestions",
+	"week_plans",
+	"plan_days",
+	"rotation_reviews",
+	"shopping_lists",
+	"shopping_groups",
+	"shopping_items",
+	"notification_prefs",
+	"push_subscriptions",
+	"notification_outbox",
+	"jobs",
+	"schedule_runs",
+	"sessions",
+	// Single-row settings tables; row is always id 1.
+	"household_settings",
+	"ai_settings",
+	"recipe_search_settings",
+	"integrations_google",
+	"chat_settings",
+}
+
+var singleRowTables = []string{
+	"household_settings",
+	"ai_settings",
+	"recipe_search_settings",
+	"integrations_google",
+	"chat_settings",
+}
+
+const testTime = "2026-10-03T12:00:00Z"
+
+// rowID is the id of the i-th test row of table. The schema stores ids as
+// opaque TEXT, so deterministic ids keep the fixtures readable.
+func rowID(table string, i int) string { return fmt.Sprintf("%s-%d", table, i) }
+
+// testRow returns a valid row for table. Rows with different i differ in
+// every unique column; references point at row 0 of the parent table.
+func testRow(table string, i int) map[string]any {
+	ts := map[string]any{"created_at": testTime, "updated_at": testTime}
+	r := map[string]any{"id": rowID(table, i)}
+	switch table {
+	case "household_settings":
+		r = map[string]any{"id": 1, "timezone": "America/New_York"}
+	case "ai_runs":
+		r["skill"] = "suggest"
+		r["skill_version"] = "1"
+		r["provider"] = "anthropic"
+		r["model"] = "claude"
+		r["temperature"] = 0.7
+		r["status"] = "ok"
+		r["request_redacted"] = "{}"
+	case "recipes":
+		r["source_url"] = fmt.Sprintf("https://example.com/recipe/%d", i)
+		r["title"] = "Chili"
+		r["raw_jsonld"] = "{}"
+		r["fetched_at"] = testTime
+	case "recipe_ingredients":
+		r["recipe_id"] = rowID("recipes", 0)
+		r["position"] = i
+		r["raw_text"] = "1 onion"
+	case "recipe_steps":
+		r["recipe_id"] = rowID("recipes", 0)
+		r["position"] = i
+		r["text"] = "Chop the onion."
+	case "photos":
+		r["source_url"] = "https://example.com/chili.jpg"
+		r["local_path"] = "photos/chili.jpg"
+		r["width"] = 800
+		r["height"] = 600
+		r["sha256"] = "abc"
+		r["fetched_at"] = testTime
+	case "dinners":
+		r["name"] = "Chili"
+		r["normalized_name"] = "chili"
+		r["status"] = "regular"
+		r["origin"] = "regular"
+		r["method"] = "crockpot"
+		r["difficulty"] = "easy"
+		r["is_favorite"] = 0
+		r["recipe_id"] = rowID("recipes", 0)
+		r["photo_id"] = rowID("photos", 0)
+		r["grounding_status"] = "grounded"
+	case "suggestion_batches":
+		r["trigger"] = "scheduled"
+		r["status"] = "done"
+		r["ai_run_id"] = rowID("ai_runs", 0)
+	case "suggestions":
+		r["dinner_id"] = rowID("dinners", 0)
+		r["batch_id"] = rowID("suggestion_batches", 0)
+		r["reason"] = "Like your chili."
+		r["cited_regular_ids"] = "[]"
+		r["status"] = "pending"
+	case "week_plans":
+		r["week_start"] = fmt.Sprintf("2026-%02d-05", i+1)
+		r["status"] = "draft"
+		r["ai_run_id"] = rowID("ai_runs", 0)
+	case "plan_days":
+		r["plan_id"] = rowID("week_plans", 0)
+		r["date"] = fmt.Sprintf("2026-01-%02d", i+5)
+		r["dinner_id"] = rowID("dinners", 0)
+		r["is_new"] = 0
+	case "rotation_reviews":
+		r["dinner_id"] = rowID("dinners", 0)
+		r["plan_date"] = fmt.Sprintf("2026-01-%02d", i+5)
+		r["status"] = "decided"
+		r["decision"] = "keep"
+	case "shopping_lists":
+		r["week_start"] = fmt.Sprintf("2026-%02d-05", i+1)
+		r["plan_id"] = rowID("week_plans", 0)
+		r["title"] = "Supply run"
+		r["status"] = "current"
+	case "shopping_groups":
+		r["list_id"] = rowID("shopping_lists", 0)
+		r["dinner_id"] = rowID("dinners", 0)
+		r["position"] = i
+	case "shopping_items":
+		r["group_id"] = rowID("shopping_groups", 0)
+		r["name"] = "Onion"
+		r["needed"] = 1
+		r["position"] = i
+	case "ai_settings":
+		r = map[string]any{"id": 1, "provider": "ollama", "base_url": "http://ollama:11434", "model": "llama", "temperature": 0.7}
+	case "recipe_search_settings":
+		r = map[string]any{"id": 1, "provider": "searxng", "base_url": "http://searxng:8080"}
+	case "integrations_google":
+		r = map[string]any{"id": 1, "refresh_token_ct": []byte{1}, "connected_at": testTime}
+	case "chat_settings":
+		r = map[string]any{"id": 1, "webhook_url_ct": []byte{1}, "last_test_status": "ok"}
+	case "notification_prefs":
+		events := []string{"plan_ready", "list_ready", "day_of_reminder", "new_suggestions", "rotation_review"}
+		r = map[string]any{"event": events[i], "push": 1, "chat": 0}
+	case "push_subscriptions":
+		r["endpoint"] = fmt.Sprintf("https://push.example.com/%d", i)
+		r["p256dh"] = "key"
+		r["auth"] = "auth"
+		r["failure_count"] = 0
+	case "notification_outbox":
+		r["event_key"] = fmt.Sprintf("plan_ready:2026-W%02d", i+1)
+		r["channel"] = "push"
+		r["payload"] = "{}"
+		r["status"] = "pending"
+		r["attempts"] = 0
+	case "jobs":
+		r["kind"] = "suggest"
+		r["status"] = "pending"
+		r["payload"] = "{}"
+	case "schedule_runs":
+		r["schedule"] = "plan_draft"
+		r["period_key"] = fmt.Sprintf("2026-W%02d", i+1)
+		r["created_at"] = testTime
+		return r
+	case "sessions":
+		return map[string]any{
+			"id_hash":      fmt.Sprintf("hash-%d", i),
+			"subject":      "sub",
+			"email":        "kitchen@example.com",
+			"name":         "Our kitchen",
+			"groups":       `["mealquest-admin"]`,
+			"csrf_token":   "csrf",
+			"created_at":   testTime,
+			"last_seen_at": testTime,
+			"expires_at":   testTime,
+		}
+	default:
+		panic("testRow: unknown table " + table)
+	}
+	for k, v := range ts {
+		r[k] = v
+	}
+	return r
+}
+
+type execer interface {
+	ExecContext(ctx context.Context, query string, args ...any) (sql.Result, error)
+}
+
+func insertSchemaRow(db execer, table string, row map[string]any) error {
+	cols := make([]string, 0, len(row))
+	for c := range row {
+		cols = append(cols, c)
+	}
+	slices.Sort(cols)
+	quoted := make([]string, len(cols))
+	args := make([]any, len(cols))
+	for i, c := range cols {
+		quoted[i] = `"` + c + `"`
+		args[i] = row[c]
+	}
+	q := fmt.Sprintf(`INSERT INTO "%s" (%s) VALUES (%s)`,
+		table, strings.Join(quoted, ", "), strings.TrimSuffix(strings.Repeat("?, ", len(cols)), ", "))
+	_, err := db.ExecContext(context.Background(), q, args...)
+	return err
+}
+
+// migratedStore opens a temp store migrated with the embedded migrations.
+func migratedStore(t *testing.T) *Store {
+	t.Helper()
+	s := openTestStore(t)
+	if err := Migrate(context.Background(), s.Writer, migrations.FS); err != nil {
+		t.Fatal(err)
+	}
+	return s
+}
+
+// seededStore is a migrated store holding row 0 of every multi-row table.
+// Single-row tables are left empty so tests can insert their only row.
+func seededStore(t *testing.T) *Store {
+	t.Helper()
+	s := migratedStore(t)
+	for _, table := range schemaTables {
+		if slices.Contains(singleRowTables, table) {
+			continue
+		}
+		if err := insertSchemaRow(s.Writer, table, testRow(table, 0)); err != nil {
+			t.Fatalf("seed %s: %v", table, err)
+		}
+	}
+	return s
+}
+
+// inRolledBackTx runs fn in a writer transaction that is always rolled back,
+// so each case starts from the seeded state.
+func inRolledBackTx(t *testing.T, s *Store, fn func(tx *sql.Tx)) {
+	t.Helper()
+	tx, err := s.Writer.BeginTx(context.Background(), nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := tx.Rollback(); err != nil {
+			t.Fatal(err)
+		}
+	}()
+	fn(tx)
+}
+
+func wantConstraintError(t *testing.T, err error, kind, what string) {
+	t.Helper()
+	if err == nil {
+		t.Fatalf("%s: accepted, want %s constraint failure", what, kind)
+	}
+	if !strings.Contains(err.Error(), kind+" constraint failed") {
+		t.Fatalf("%s: error %q, want %s constraint failure", what, err, kind)
+	}
+}
+
+func TestSchemaTablesExist(t *testing.T) {
+	s := migratedStore(t)
+	if len(schemaTables) != 25 {
+		t.Fatalf("schemaTables lists %d tables, want 25", len(schemaTables))
+	}
+	for _, table := range schemaTables {
+		if !tableExists(t, s, table) {
+			t.Errorf("table %s missing", table)
+		}
+	}
+}
+
+func TestSchemaForeignKeysAreValid(t *testing.T) {
+	s := seededStore(t)
+	rows, err := s.Writer.Query("PRAGMA foreign_key_check")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer rows.Close()
+	if rows.Next() {
+		t.Error("foreign_key_check reported violations in the seeded data")
+	}
+	if err := rows.Err(); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestSchemaEnumChecksRejectInvalidValues(t *testing.T) {
+	cases := []struct {
+		table, column string
+		bad           any
+	}{
+		{"household_settings", "plan_draft_dow", 7},
+		{"household_settings", "suggestions_dow", -1},
+		{"household_settings", "chat_autosend_dow", 7},
+		{"household_settings", "plan_draft_dow", 5.5},
+		{"household_settings", "suggestions_dow", 0.5},
+		{"household_settings", "chat_autosend_dow", 3.5},
+		{"ai_runs", "provider", "openai"},
+		{"ai_runs", "status", "done"},
+		{"dinners", "status", "deck"},
+		{"dinners", "origin", "ai"},
+		{"dinners", "method", "microwave"},
+		{"dinners", "difficulty", "extreme"},
+		{"dinners", "is_favorite", 2},
+		{"dinners", "grounding_status", "unknown"},
+		{"suggestion_batches", "trigger", "cron"},
+		{"suggestion_batches", "status", "ok"},
+		{"suggestions", "status", "maybe"},
+		{"week_plans", "status", "final"},
+		{"plan_days", "is_new", 2},
+		{"rotation_reviews", "status", "open"},
+		{"rotation_reviews", "decision", "promote"},
+		{"shopping_lists", "status", "frozen"},
+		{"shopping_items", "needed", 2},
+		{"ai_settings", "provider", "openai"},
+		{"recipe_search_settings", "provider", "google"},
+		{"chat_settings", "last_test_status", "pending"},
+		{"notification_prefs", "event", "weekly_digest"},
+		{"notification_prefs", "push", 2},
+		{"notification_prefs", "chat", 2},
+		{"notification_outbox", "channel", "email"},
+		{"notification_outbox", "status", "queued"},
+		{"jobs", "status", "queued"},
+		{"schedule_runs", "schedule", "hourly"},
+	}
+	s := seededStore(t)
+	for _, c := range cases {
+		t.Run(fmt.Sprintf("%s.%s=%v", c.table, c.column, c.bad), func(t *testing.T) {
+			row := testRow(c.table, 1)
+			if slices.Contains(singleRowTables, c.table) {
+				row = testRow(c.table, 0)
+			}
+			inRolledBackTx(t, s, func(tx *sql.Tx) {
+				if err := insertSchemaRow(tx, c.table, row); err != nil {
+					t.Fatalf("valid row rejected: %v", err)
+				}
+			})
+			row[c.column] = c.bad
+			inRolledBackTx(t, s, func(tx *sql.Tx) {
+				wantConstraintError(t, insertSchemaRow(tx, c.table, row), "CHECK", fmt.Sprintf("%s.%s = %v", c.table, c.column, c.bad))
+			})
+		})
+	}
+}
+
+func TestSchemaRotationReviewEventAllowed(t *testing.T) {
+	s := migratedStore(t)
+	if err := insertSchemaRow(s.Writer, "notification_prefs", testRow("notification_prefs", 4)); err != nil {
+		t.Fatalf("rotation_review event rejected: %v", err)
+	}
+}
+
+func TestSchemaDinnerStatuses(t *testing.T) {
+	s := seededStore(t)
+	for _, status := range []string{"suggested", "quest_log", "tried", "regular", "archived"} {
+		inRolledBackTx(t, s, func(tx *sql.Tx) {
+			row := testRow("dinners", 1)
+			row["status"] = status
+			if err := insertSchemaRow(tx, "dinners", row); err != nil {
+				t.Errorf("status %s rejected: %v", status, err)
+			}
+		})
+	}
+}
+
+func TestSchemaUniqueConstraintsRejectDuplicates(t *testing.T) {
+	cases := []struct {
+		table   string
+		columns []string
+	}{
+		{"recipes", []string{"source_url"}},
+		{"week_plans", []string{"week_start"}},
+		{"plan_days", []string{"plan_id", "date"}},
+		{"rotation_reviews", []string{"dinner_id", "plan_date"}},
+		{"shopping_lists", []string{"week_start"}},
+		{"push_subscriptions", []string{"endpoint"}},
+		{"notification_outbox", []string{"event_key", "channel"}},
+		{"schedule_runs", []string{"schedule", "period_key"}},
+		{"notification_prefs", []string{"event"}},
+	}
+	s := seededStore(t)
+	for _, c := range cases {
+		t.Run(c.table+"("+strings.Join(c.columns, ",")+")", func(t *testing.T) {
+			row := testRow(c.table, 1)
+			inRolledBackTx(t, s, func(tx *sql.Tx) {
+				if err := insertSchemaRow(tx, c.table, row); err != nil {
+					t.Fatalf("distinct row rejected: %v", err)
+				}
+			})
+			seeded := testRow(c.table, 0)
+			for _, col := range c.columns {
+				row[col] = seeded[col]
+			}
+			inRolledBackTx(t, s, func(tx *sql.Tx) {
+				wantConstraintError(t, insertSchemaRow(tx, c.table, row), "UNIQUE", "duplicate "+c.table)
+			})
+		})
+	}
+}
+
+// TestSchemaCompositeUniqueAllowsPartialOverlap shows each composite UNIQUE
+// spans all its columns: a row sharing only some of them with the seeded row
+// is accepted. (Sharing only the other columns is covered by the distinct row
+// in TestSchemaUniqueConstraintsRejectDuplicates.)
+func TestSchemaCompositeUniqueAllowsPartialOverlap(t *testing.T) {
+	cases := []struct {
+		name   string
+		table  string
+		shared string         // column copied from the seeded row
+		parent string         // row 1 of this table is inserted first, if set
+		set    map[string]any // columns that differ from the seeded row
+	}{
+		{"same date, different plan", "plan_days", "date", "week_plans", map[string]any{"plan_id": rowID("week_plans", 1)}},
+		{"same plan_date, different dinner", "rotation_reviews", "plan_date", "dinners", map[string]any{"dinner_id": rowID("dinners", 1)}},
+		{"same event_key, different channel", "notification_outbox", "event_key", "", map[string]any{"channel": "chat"}},
+		{"same period_key, different schedule", "schedule_runs", "period_key", "", map[string]any{"schedule": "week_rollover"}},
+	}
+	s := seededStore(t)
+	for _, c := range cases {
+		t.Run(c.table+": "+c.name, func(t *testing.T) {
+			row := testRow(c.table, 1)
+			row[c.shared] = testRow(c.table, 0)[c.shared]
+			for k, v := range c.set {
+				row[k] = v
+			}
+			inRolledBackTx(t, s, func(tx *sql.Tx) {
+				if c.parent != "" {
+					if err := insertSchemaRow(tx, c.parent, testRow(c.parent, 1)); err != nil {
+						t.Fatalf("insert parent: %v", err)
+					}
+				}
+				if err := insertSchemaRow(tx, c.table, row); err != nil {
+					t.Fatalf("row rejected: %v", err)
+				}
+			})
+		})
+	}
+}
+
+// TestSchemaTextPrimaryKeysRejectNull guards against SQLite's legacy
+// acceptance of NULL in non-INTEGER primary keys.
+func TestSchemaTextPrimaryKeysRejectNull(t *testing.T) {
+	s := seededStore(t)
+	ctx := context.Background()
+	for _, table := range schemaTables {
+		if slices.Contains(singleRowTables, table) {
+			continue
+		}
+		key := "id"
+		switch table {
+		case "notification_prefs":
+			key = "event"
+		case "sessions":
+			key = "id_hash"
+		}
+		t.Run(table+"."+key, func(t *testing.T) {
+			inRolledBackTx(t, s, func(tx *sql.Tx) {
+				// Two NULL-key rows: neither may be accepted, so NULL can
+				// never stand in for a key, once or repeatedly.
+				for i := 1; i <= 2; i++ {
+					row := testRow(table, i)
+					row[key] = nil
+					wantConstraintError(t, insertSchemaRow(tx, table, row), "NOT NULL", fmt.Sprintf("%s.%s = NULL (row %d)", table, key, i))
+				}
+				var n int
+				if err := tx.QueryRowContext(ctx, fmt.Sprintf(`SELECT count(*) FROM "%s" WHERE "%s" IS NULL`, table, key)).Scan(&n); err != nil {
+					t.Fatal(err)
+				}
+				if n != 0 {
+					t.Errorf("%d rows with NULL %s", n, key)
+				}
+			})
+		})
+	}
+}
+
+func TestSchemaSingleRowTablesRejectSecondRow(t *testing.T) {
+	s := migratedStore(t)
+	for _, table := range singleRowTables {
+		if err := insertSchemaRow(s.Writer, table, testRow(table, 0)); err != nil {
+			t.Fatalf("%s: %v", table, err)
+		}
+		row := testRow(table, 0)
+		row["id"] = 2
+		wantConstraintError(t, insertSchemaRow(s.Writer, table, row), "CHECK", table+" second row")
+	}
+}
+
+func TestSchemaDeleteParentWithChildrenRefused(t *testing.T) {
+	cases := []struct{ parent, child, column string }{
+		{"recipes", "recipe_ingredients", "recipe_id"},
+		{"recipes", "recipe_steps", "recipe_id"},
+		{"recipes", "dinners", "recipe_id"},
+		{"photos", "dinners", "photo_id"},
+		{"dinners", "suggestions", "dinner_id"},
+		{"suggestion_batches", "suggestions", "batch_id"},
+		{"week_plans", "plan_days", "plan_id"},
+		{"dinners", "plan_days", "dinner_id"},
+		{"dinners", "rotation_reviews", "dinner_id"},
+		{"week_plans", "shopping_lists", "plan_id"},
+		{"shopping_lists", "shopping_groups", "list_id"},
+		{"dinners", "shopping_groups", "dinner_id"},
+		{"shopping_groups", "shopping_items", "group_id"},
+		// ai_runs too: the purge must clear references before deleting.
+		{"ai_runs", "suggestion_batches", "ai_run_id"},
+		{"ai_runs", "week_plans", "ai_run_id"},
+	}
+	s := seededStore(t)
+	for _, c := range cases {
+		t.Run(c.parent+"<-"+c.child+"."+c.column, func(t *testing.T) {
+			// A fresh parent with exactly one child, through this column only.
+			parentID := rowID(c.parent, 1)
+			child := testRow(c.child, 1)
+			child[c.column] = parentID
+			del := fmt.Sprintf(`DELETE FROM "%s" WHERE id = ?`, c.parent)
+			ctx := context.Background()
+
+			inRolledBackTx(t, s, func(tx *sql.Tx) {
+				if err := insertSchemaRow(tx, c.parent, testRow(c.parent, 1)); err != nil {
+					t.Fatalf("insert parent: %v", err)
+				}
+				if err := insertSchemaRow(tx, c.child, child); err != nil {
+					t.Fatalf("insert child: %v", err)
+				}
+				_, err := tx.ExecContext(ctx, del, parentID)
+				wantConstraintError(t, err, "FOREIGN KEY", "delete "+c.parent)
+				var n int
+				if err := tx.QueryRowContext(ctx, fmt.Sprintf(`SELECT count(*) FROM "%s" WHERE id = ?`, c.parent), parentID).Scan(&n); err != nil {
+					t.Fatal(err)
+				}
+				if n != 1 {
+					t.Errorf("parent row gone after refused delete")
+				}
+			})
+			// Control: without the child the same delete succeeds.
+			inRolledBackTx(t, s, func(tx *sql.Tx) {
+				if err := insertSchemaRow(tx, c.parent, testRow(c.parent, 1)); err != nil {
+					t.Fatalf("insert parent: %v", err)
+				}
+				if _, err := tx.ExecContext(ctx, del, parentID); err != nil {
+					t.Fatalf("delete childless parent: %v", err)
+				}
+			})
+		})
+	}
+}

internal/store/store.go

@@ -0,0 +1,79 @@
+// Package store owns the MealQuest SQLite database: one writer connection,
+// a read pool, and the embedded schema migrations.
+package store
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"fmt"
+	"net/url"
+	"path/filepath"
+
+	_ "modernc.org/sqlite" // registers the "sqlite" database/sql driver
+)
+
+// FileName is the database file inside the data directory.
+const FileName = "mealquest.db"
+
+// readPoolSize is the maximum number of open read connections.
+const readPoolSize = 4
+
+// connPragmas are applied by the driver to every new connection.
+var connPragmas = []string{
+	"busy_timeout(5000)",
+	"journal_mode(WAL)",
+	"foreign_keys(1)",
+}
+
+// Store holds the database handles. All writes go through Writer, which has
+// exactly one connection; Reader is a pool of read-only connections.
+type Store struct {
+	Writer *sql.DB
+	Reader *sql.DB
+}
+
+// Open opens <dataDir>/mealquest.db, creating it if absent, and verifies both
+// handles can connect. It does not apply migrations; call Migrate for that.
+func Open(ctx context.Context, dataDir string) (*Store, error) {
+	path, err := filepath.Abs(filepath.Join(dataDir, FileName))
+	if err != nil {
+		return nil, fmt.Errorf("store: resolve database path: %w", err)
+	}
+
+	// The writer is opened and pinged first so the file exists and is in WAL
+	// mode before any read-only connection touches it.
+	writer, err := openDB(ctx, path, 1, url.Values{"_txlock": {"immediate"}})
+	if err != nil {
+		return nil, fmt.Errorf("store: open writer: %w", err)
+	}
+	reader, err := openDB(ctx, path, readPoolSize, url.Values{"_pragma": {"query_only(1)"}})
+	if err != nil {
+		return nil, errors.Join(fmt.Errorf("store: open reader: %w", err), writer.Close())
+	}
+	return &Store{Writer: writer, Reader: reader}, nil
+}
+
+// Close closes both handles.
+func (s *Store) Close() error {
+	return errors.Join(s.Reader.Close(), s.Writer.Close())
+}
+
+func openDB(ctx context.Context, path string, maxConns int, extra url.Values) (*sql.DB, error) {
+	q := url.Values{"_pragma": connPragmas}
+	for k, vs := range extra {
+		q[k] = append(q[k], vs...)
+	}
+	dsn := (&url.URL{Scheme: "file", Path: path, RawQuery: q.Encode()}).String()
+
+	db, err := sql.Open("sqlite", dsn)
+	if err != nil {
+		return nil, err
+	}
+	db.SetMaxOpenConns(maxConns)
+	db.SetMaxIdleConns(maxConns)
+	if err := db.PingContext(ctx); err != nil {
+		return nil, errors.Join(err, db.Close())
+	}
+	return db, nil
+}

internal/store/store_test.go

@@ -0,0 +1,116 @@
+package store
+
+import (
+	"context"
+	"database/sql"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func openTestStore(t *testing.T) *Store {
+	t.Helper()
+	s, err := Open(context.Background(), t.TempDir())
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() {
+		if err := s.Close(); err != nil {
+			t.Error(err)
+		}
+	})
+	return s
+}
+
+func TestOpenCreatesDatabaseFile(t *testing.T) {
+	dir := t.TempDir()
+	s, err := Open(context.Background(), dir)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer s.Close()
+	if _, err := os.Stat(filepath.Join(dir, FileName)); err != nil {
+		t.Fatalf("database file: %v", err)
+	}
+}
+
+func TestOpenMissingDirFails(t *testing.T) {
+	_, err := Open(context.Background(), filepath.Join(t.TempDir(), "missing"))
+	if err == nil {
+		t.Fatal("Open succeeded on a missing data directory")
+	}
+}
+
+func TestPoolSizes(t *testing.T) {
+	s := openTestStore(t)
+	if got := s.Writer.Stats().MaxOpenConnections; got != 1 {
+		t.Errorf("writer max open connections = %d, want 1", got)
+	}
+	if got := s.Reader.Stats().MaxOpenConnections; got != readPoolSize {
+		t.Errorf("reader max open connections = %d, want %d", got, readPoolSize)
+	}
+}
+
+// TestPragmasOnEveryConnection holds every reader connection open at once so
+// each one is a distinct connection, then checks the pragmas on each and on
+// the writer.
+func TestPragmasOnEveryConnection(t *testing.T) {
+	ctx := context.Background()
+	s := openTestStore(t)
+
+	conns := []*sql.Conn{}
+	for range readPoolSize {
+		c, err := s.Reader.Conn(ctx)
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer c.Close()
+		conns = append(conns, c)
+	}
+	w, err := s.Writer.Conn(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer w.Close()
+	conns = append(conns, w)
+
+	for i, c := range conns {
+		var fk, busy int
+		var journal string
+		if err := c.QueryRowContext(ctx, "PRAGMA foreign_keys").Scan(&fk); err != nil {
+			t.Fatal(err)
+		}
+		if err := c.QueryRowContext(ctx, "PRAGMA busy_timeout").Scan(&busy); err != nil {
+			t.Fatal(err)
+		}
+		if err := c.QueryRowContext(ctx, "PRAGMA journal_mode").Scan(&journal); err != nil {
+			t.Fatal(err)
+		}
+		if fk != 1 || busy != 5000 || journal != "wal" {
+			t.Errorf("connection %d: foreign_keys=%d busy_timeout=%d journal_mode=%q, want 1, 5000, wal", i, fk, busy, journal)
+		}
+	}
+}
+
+func TestReaderIsReadOnly(t *testing.T) {
+	s := openTestStore(t)
+	if _, err := s.Reader.Exec("CREATE TABLE t (id INTEGER)"); err == nil {
+		t.Fatal("write through the reader succeeded")
+	}
+	if _, err := s.Writer.Exec("CREATE TABLE t (id INTEGER)"); err != nil {
+		t.Fatalf("write through the writer: %v", err)
+	}
+}
+
+func TestForeignKeysEnforced(t *testing.T) {
+	s := openTestStore(t)
+	if _, err := s.Writer.Exec(`
+		CREATE TABLE parent (id INTEGER PRIMARY KEY);
+		CREATE TABLE child (parent_id INTEGER NOT NULL REFERENCES parent(id));
+	`); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := s.Writer.Exec("INSERT INTO child (parent_id) VALUES (42)"); err == nil {
+		t.Fatal("insert violating a foreign key succeeded")
+	}
+}

internal/store/time.go

@@ -0,0 +1,119 @@
+package store
+
+import (
+	"database/sql/driver"
+	"errors"
+	"fmt"
+	"time"
+)
+
+// timestampLayout is RFC 3339 in UTC with fixed millisecond precision, so
+// stored timestamps sort lexicographically in time order.
+const timestampLayout = "2006-01-02T15:04:05.000Z"
+
+// Timestamp is an instant stored as UTC RFC 3339 TEXT with millisecond
+// precision. Sub-millisecond precision is dropped on write. Use
+// sql.Null[Timestamp] for a nullable column.
+type Timestamp struct {
+	time.Time
+}
+
+// Now returns the current instant as a Timestamp, in UTC at millisecond
+// precision, so it equals its stored form.
+func Now() Timestamp {
+	return Timestamp{time.Now().UTC().Truncate(time.Millisecond)}
+}
+
+// String returns the stored TEXT form.
+func (t Timestamp) String() string {
+	return t.UTC().Format(timestampLayout)
+}
+
+// Value implements driver.Valuer. The zero Timestamp is an error, as is a UTC
+// year outside 0000–9999, which the four-digit stored form cannot represent.
+func (t Timestamp) Value() (driver.Value, error) {
+	if t.IsZero() {
+		return nil, errors.New("store: zero Timestamp")
+	}
+	if y := t.UTC().Year(); y < 0 || y > 9999 {
+		return nil, fmt.Errorf("store: Timestamp year %d outside 0000-9999", y)
+	}
+	return t.String(), nil
+}
+
+// Scan implements sql.Scanner. It accepts only TEXT in the stored form, and
+// rejects the zero instant, which Value refuses to write.
+func (t *Timestamp) Scan(src any) error {
+	s, ok := src.(string)
+	if !ok {
+		return fmt.Errorf("store: scan Timestamp: want TEXT, got %T", src)
+	}
+	parsed, err := time.Parse(timestampLayout, s)
+	if err != nil {
+		return fmt.Errorf("store: scan Timestamp %q: %w", s, err)
+	}
+	if parsed.Format(timestampLayout) != s {
+		return fmt.Errorf("store: scan Timestamp %q: want %s", s, timestampLayout)
+	}
+	if parsed.IsZero() {
+		return fmt.Errorf("store: scan Timestamp %q: zero Timestamp", s)
+	}
+	t.Time = parsed
+	return nil
+}
+
+// localDateLayout is the household-local calendar date form.
+const localDateLayout = "2006-01-02"
+
+// LocalDate is a household-local calendar date with no time or zone, stored
+// as YYYY-MM-DD TEXT. The zero LocalDate is invalid and cannot be stored.
+type LocalDate struct {
+	year  int
+	month time.Month
+	day   int
+}
+
+// ParseLocalDate parses a YYYY-MM-DD date, rejecting any other form and any
+// date that does not exist on the calendar.
+func ParseLocalDate(s string) (LocalDate, error) {
+	t, err := time.Parse(localDateLayout, s)
+	if err != nil {
+		return LocalDate{}, fmt.Errorf("store: invalid date %q: %w", s, err)
+	}
+	if t.Format(localDateLayout) != s {
+		return LocalDate{}, fmt.Errorf("store: invalid date %q: want YYYY-MM-DD", s)
+	}
+	return LocalDate{t.Year(), t.Month(), t.Day()}, nil
+}
+
+// String returns the YYYY-MM-DD form.
+func (d LocalDate) String() string {
+	return fmt.Sprintf("%04d-%02d-%02d", d.year, int(d.month), d.day)
+}
+
+// IsZero reports whether d is the zero LocalDate.
+func (d LocalDate) IsZero() bool {
+	return d == LocalDate{}
+}
+
+// Value implements driver.Valuer. The zero LocalDate is an error.
+func (d LocalDate) Value() (driver.Value, error) {
+	if d.IsZero() {
+		return nil, errors.New("store: zero LocalDate")
+	}
+	return d.String(), nil
+}
+
+// Scan implements sql.Scanner. It accepts only YYYY-MM-DD TEXT.
+func (d *LocalDate) Scan(src any) error {
+	s, ok := src.(string)
+	if !ok {
+		return fmt.Errorf("store: scan LocalDate: want TEXT, got %T", src)
+	}
+	parsed, err := ParseLocalDate(s)
+	if err != nil {
+		return fmt.Errorf("store: scan LocalDate: %w", err)
+	}
+	*d = parsed
+	return nil
+}

internal/store/time_test.go

@@ -0,0 +1,126 @@
+package store
+
+import (
+	"context"
+	"testing"
+	"time"
+)
+
+func openTypesTestStore(t *testing.T) *Store {
+	t.Helper()
+	s := openTestStore(t)
+	if _, err := s.Writer.Exec("CREATE TABLE v (val TEXT)"); err != nil {
+		t.Fatal(err)
+	}
+	return s
+}
+
+// roundTrip writes in through the writer, then reads it back into out and
+// returns the stored SQLite type and raw text.
+func roundTrip(t *testing.T, s *Store, in, out any) (typ, raw string) {
+	t.Helper()
+	ctx := context.Background()
+	if _, err := s.Writer.ExecContext(ctx, "DELETE FROM v"); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := s.Writer.ExecContext(ctx, "INSERT INTO v (val) VALUES (?)", in); err != nil {
+		t.Fatal(err)
+	}
+	if err := s.Reader.QueryRowContext(ctx, "SELECT typeof(val), val, val FROM v").Scan(&typ, &raw, out); err != nil {
+		t.Fatal(err)
+	}
+	return typ, raw
+}
+
+func TestTimestampRoundTrip(t *testing.T) {
+	s := openTypesTestStore(t)
+	zone := time.FixedZone("EDT", -4*60*60)
+	in := Timestamp{time.Date(2026, 10, 3, 8, 37, 5, 123456789, zone)}
+
+	var out Timestamp
+	typ, raw := roundTrip(t, s, in, &out)
+	if typ != "text" || raw != "2026-10-03T12:37:05.123Z" {
+		t.Fatalf("stored %s %q, want text %q", typ, raw, "2026-10-03T12:37:05.123Z")
+	}
+	if want := in.Truncate(time.Millisecond); !out.Equal(want) {
+		t.Fatalf("read back %v, want %v", out, want)
+	}
+	if out.Location() != time.UTC {
+		t.Fatalf("read back location %v, want UTC", out.Location())
+	}
+
+	now := Now()
+	roundTrip(t, s, now, &out)
+	if out != now {
+		t.Fatalf("Now() round trip = %#v, want %#v", out, now)
+	}
+}
+
+func TestTimestampRejects(t *testing.T) {
+	if _, err := (Timestamp{}).Value(); err == nil {
+		t.Error("zero Timestamp Value succeeded")
+	}
+	for _, tm := range []time.Time{
+		time.Date(10000, 1, 1, 0, 0, 0, 0, time.UTC),
+		time.Date(-1, 12, 31, 0, 0, 0, 0, time.UTC),
+		time.Date(9999, 12, 31, 23, 0, 0, 0, time.FixedZone("west", -2*3600)),
+	} {
+		if v, err := (Timestamp{tm}).Value(); err == nil {
+			t.Errorf("Timestamp{%v}.Value() = %v, want error", tm, v)
+		}
+	}
+	for _, src := range []any{
+		nil, int64(0), []byte("2026-10-03T12:37:05.123Z"), "2026-10-03T12:37:05Z",
+		"2026-10-03T08:37:05.123-04:00", "2026-10-03T12:37:05,123Z", "garbage",
+		"0001-01-01T00:00:00.000Z",
+	} {
+		var ts Timestamp
+		if err := ts.Scan(src); err == nil {
+			t.Errorf("Scan(%#v) succeeded", src)
+		}
+	}
+}
+
+func TestLocalDateRoundTrip(t *testing.T) {
+	s := openTypesTestStore(t)
+	for _, str := range []string{"2026-10-03", "2028-02-29", "0001-01-01", "9999-12-31"} {
+		in, err := ParseLocalDate(str)
+		if err != nil {
+			t.Fatalf("ParseLocalDate(%q): %v", str, err)
+		}
+		if in.String() != str {
+			t.Fatalf("String() = %q, want %q", in.String(), str)
+		}
+		var out LocalDate
+		typ, raw := roundTrip(t, s, in, &out)
+		if typ != "text" || raw != str {
+			t.Fatalf("stored %s %q, want text %q", typ, raw, str)
+		}
+		if out != in {
+			t.Fatalf("read back %v, want %v", out, in)
+		}
+	}
+}
+
+func TestLocalDateRejectsInvalid(t *testing.T) {
+	for _, str := range []string{
+		"", "2026-02-30", "2026-02-29", "2026-13-01", "2026-00-10", "2026-10-00",
+		"2026-10-32", "2026-1-03", "2026-10-3", "26-10-03", "2026/10/03",
+		"2026-10-03T00:00:00Z", " 2026-10-03", "20261003", "not-a-date",
+	} {
+		if d, err := ParseLocalDate(str); err == nil {
+			t.Errorf("ParseLocalDate(%q) = %v, want error", str, d)
+		}
+		var d LocalDate
+		if err := d.Scan(str); err == nil {
+			t.Errorf("Scan(%q) succeeded", str)
+		}
+	}
+	if _, err := (LocalDate{}).Value(); err == nil {
+		t.Error("zero LocalDate Value succeeded")
+	}
+	var d LocalDate
+	if err := d.Scan(nil); err == nil {
+		t.Error("Scan(nil) succeeded")
+	}
+}

internal/store/tx.go

@@ -0,0 +1,37 @@
+package store
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"fmt"
+)
+
+// WithTx runs fn in a transaction on the writer. It commits when fn returns
+// nil and rolls back when fn returns an error, panics or exits the goroutine.
+// A panic is not recovered: it propagates unchanged after the rollback.
+func (s *Store) WithTx(ctx context.Context, fn func(tx *sql.Tx) error) error {
+	tx, err := s.Writer.BeginTx(ctx, nil)
+	if err != nil {
+		return fmt.Errorf("store: begin transaction: %w", err)
+	}
+	finished := false
+	defer func() {
+		if !finished {
+			_ = tx.Rollback() // fn panicked; the panic carries on regardless
+		}
+	}()
+
+	if err := fn(tx); err != nil {
+		finished = true
+		if rbErr := tx.Rollback(); rbErr != nil {
+			return errors.Join(err, fmt.Errorf("store: roll back transaction: %w", rbErr))
+		}
+		return err
+	}
+	finished = true
+	if err := tx.Commit(); err != nil {
+		return fmt.Errorf("store: commit transaction: %w", err)
+	}
+	return nil
+}

internal/store/tx_test.go

@@ -0,0 +1,84 @@
+package store
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"testing"
+)
+
+func openTxTestStore(t *testing.T) *Store {
+	t.Helper()
+	s := openTestStore(t)
+	if _, err := s.Writer.Exec("CREATE TABLE t (id INTEGER PRIMARY KEY)"); err != nil {
+		t.Fatal(err)
+	}
+	return s
+}
+
+func countRows(t *testing.T, s *Store) int {
+	t.Helper()
+	var n int
+	if err := s.Reader.QueryRow("SELECT count(*) FROM t").Scan(&n); err != nil {
+		t.Fatal(err)
+	}
+	return n
+}
+
+func insertRow(tx *sql.Tx) error {
+	_, err := tx.Exec("INSERT INTO t (id) VALUES (1)")
+	return err
+}
+
+func TestWithTxCommitsOnNil(t *testing.T) {
+	s := openTxTestStore(t)
+	if err := s.WithTx(context.Background(), insertRow); err != nil {
+		t.Fatal(err)
+	}
+	if n := countRows(t, s); n != 1 {
+		t.Fatalf("rows after commit = %d, want 1", n)
+	}
+}
+
+func TestWithTxRollsBackOnError(t *testing.T) {
+	s := openTxTestStore(t)
+	errBoom := errors.New("boom")
+	err := s.WithTx(context.Background(), func(tx *sql.Tx) error {
+		if err := insertRow(tx); err != nil {
+			t.Fatal(err)
+		}
+		return errBoom
+	})
+	if !errors.Is(err, errBoom) {
+		t.Fatalf("WithTx error = %v, want %v", err, errBoom)
+	}
+	if n := countRows(t, s); n != 0 {
+		t.Fatalf("rows after rollback = %d, want 0", n)
+	}
+}
+
+func TestWithTxRollsBackOnPanic(t *testing.T) {
+	s := openTxTestStore(t)
+	const value = "kaboom"
+	func() {
+		defer func() {
+			if p := recover(); p != value {
+				t.Fatalf("recovered %v, want panic %q to propagate", p, value)
+			}
+		}()
+		_ = s.WithTx(context.Background(), func(tx *sql.Tx) error {
+			if err := insertRow(tx); err != nil {
+				t.Fatal(err)
+			}
+			panic(value)
+		})
+		t.Fatal("WithTx returned instead of panicking")
+	}()
+	if n := countRows(t, s); n != 0 {
+		t.Fatalf("rows after panic = %d, want 0", n)
+	}
+	// The single writer connection must have been released.
+	if err := s.WithTx(context.Background(), insertRow); err != nil {
+		t.Fatalf("WithTx after panic: %v", err)
+	}
+}

migrations/0000_bootstrap.sql

@@ -0,0 +1,4 @@
+-- 0000_bootstrap: immutable no-op bootstrap migration. It lets the migrations
+-- embed compile and proves the runner end to end. Never edit or remove it:
+-- applied versions are recorded by filename and never re-run. The initial v1
+-- schema arrives as a new migration, 0001_init.sql (Feature 02 task 3).

migrations/0001_init.sql

@@ -0,0 +1,333 @@
+-- 0001_init: the initial v1 schema (CTXD CONTEXT.MD data model).
+--
+-- Conventions:
+--   * Row ids are ULIDs stored as TEXT NOT NULL PRIMARY KEY (SQLite would
+--     otherwise accept NULL in a TEXT primary key). Single-row settings tables
+--     use id INTEGER PRIMARY KEY CHECK (id = 1) so a second row is refused.
+--   * Timestamps are UTC RFC 3339 TEXT. Household-local dates (week_start,
+--     plan day) are YYYY-MM-DD TEXT; household-local times are HH:MM TEXT.
+--   * Columns ending in _ct only ever hold secretbox ciphertext.
+--   * Every enum column has a CHECK. Booleans are INTEGER CHECK (x IN (0, 1)).
+--     Days of the week are INTEGER IN (0, 1, 2, 3, 4, 5, 6), Sunday = 0 (Go
+--     time.Weekday); IN rather than BETWEEN so fractional values are refused.
+--   * Foreign keys use the default NO ACTION, so deleting a parent that still
+--     has children is refused. This includes ai_run_id: the 30-day ai_runs
+--     purge must clear those references explicitly before deleting.
+--   * Defaults exist only where CTXD names one (household_settings times and
+--     shopping_items.needed).
+--
+-- Enum value sets not spelled out in CONTEXT.MD, chosen here:
+--   ai_settings.provider, ai_runs.provider: openai_compatible, anthropic, ollama
+--   ai_runs.status: running, ok, error
+--   chat_settings.last_test_status: ok, failed
+--   jobs.status, suggestion_batches.status: pending, running, done, failed
+--   notification_outbox.status: pending, sent, failed
+--   schedule_runs.schedule: suggestions_weekly, plan_draft,
+--     shopping_chat_autosend, day_of_reminder, rotation_check, week_rollover,
+--     ai_runs_purge
+-- jobs.kind and ai_runs.skill are open identifiers that grow with features,
+-- not enums, so they carry no CHECK.
+
+CREATE TABLE household_settings (
+	id                      INTEGER PRIMARY KEY CHECK (id = 1),
+	timezone                TEXT    NOT NULL,
+	dinner_time             TEXT    NOT NULL DEFAULT '17:30',
+	reminder_time           TEXT    NOT NULL DEFAULT '16:30',
+	review_time             TEXT    NOT NULL DEFAULT '09:00',
+	plan_draft_dow          INTEGER NOT NULL DEFAULT 5 CHECK (plan_draft_dow IN (0, 1, 2, 3, 4, 5, 6)),
+	plan_draft_time         TEXT    NOT NULL DEFAULT '09:00',
+	suggestions_dow         INTEGER NOT NULL DEFAULT 0 CHECK (suggestions_dow IN (0, 1, 2, 3, 4, 5, 6)),
+	suggestions_time        TEXT    NOT NULL DEFAULT '08:00',
+	chat_autosend_dow       INTEGER NOT NULL DEFAULT 6 CHECK (chat_autosend_dow IN (0, 1, 2, 3, 4, 5, 6)),
+	chat_autosend_time      TEXT    NOT NULL DEFAULT '08:00',
+	onboarding_completed_at TEXT,
+	updates_seen_at         TEXT,
+	created_at              TEXT    NOT NULL,
+	updated_at              TEXT    NOT NULL
+);
+
+CREATE TABLE ai_runs (
+	id                 TEXT    NOT NULL PRIMARY KEY,
+	skill              TEXT    NOT NULL,
+	skill_version      TEXT    NOT NULL,
+	provider           TEXT    NOT NULL CHECK (provider IN ('openai_compatible', 'anthropic', 'ollama')),
+	model              TEXT    NOT NULL,
+	temperature        REAL    NOT NULL,
+	status             TEXT    NOT NULL CHECK (status IN ('running', 'ok', 'error')),
+	latency_ms         INTEGER,
+	tokens_in          INTEGER,
+	tokens_out         INTEGER,
+	error              TEXT,
+	request_redacted   TEXT    NOT NULL,
+	response_redacted  TEXT,
+	created_at         TEXT    NOT NULL,
+	updated_at         TEXT    NOT NULL
+);
+
+CREATE TABLE recipes (
+	id            TEXT    NOT NULL PRIMARY KEY,
+	source_url    TEXT    NOT NULL UNIQUE,
+	site_name     TEXT,
+	title         TEXT    NOT NULL,
+	total_minutes INTEGER,
+	prep_minutes  INTEGER,
+	cook_minutes  INTEGER,
+	yield         TEXT,
+	raw_jsonld    TEXT    NOT NULL,
+	fetched_at    TEXT    NOT NULL,
+	created_at    TEXT    NOT NULL,
+	updated_at    TEXT    NOT NULL
+);
+
+CREATE TABLE recipe_ingredients (
+	id         TEXT    NOT NULL PRIMARY KEY,
+	recipe_id  TEXT    NOT NULL REFERENCES recipes (id),
+	position   INTEGER NOT NULL,
+	raw_text   TEXT    NOT NULL,
+	name       TEXT,
+	qty        TEXT,
+	unit       TEXT,
+	note       TEXT,
+	created_at TEXT    NOT NULL,
+	updated_at TEXT    NOT NULL
+);
+
+CREATE TABLE recipe_steps (
+	id         TEXT    NOT NULL PRIMARY KEY,
+	recipe_id  TEXT    NOT NULL REFERENCES recipes (id),
+	position   INTEGER NOT NULL,
+	text       TEXT    NOT NULL,
+	created_at TEXT    NOT NULL,
+	updated_at TEXT    NOT NULL
+);
+
+CREATE TABLE photos (
+	id         TEXT    NOT NULL PRIMARY KEY,
+	source_url TEXT    NOT NULL,
+	local_path TEXT    NOT NULL,
+	width      INTEGER NOT NULL,
+	height     INTEGER NOT NULL,
+	sha256     TEXT    NOT NULL,
+	fetched_at TEXT    NOT NULL,
+	created_at TEXT    NOT NULL,
+	updated_at TEXT    NOT NULL
+);
+
+CREATE TABLE dinners (
+	id               TEXT    NOT NULL PRIMARY KEY,
+	name             TEXT    NOT NULL,
+	normalized_name  TEXT    NOT NULL,
+	status           TEXT    NOT NULL CHECK (status IN ('suggested', 'quest_log', 'tried', 'regular', 'archived')),
+	origin           TEXT    NOT NULL CHECK (origin IN ('regular', 'side_quest', 'ingredients', 'quick', 'manual')),
+	method           TEXT    CHECK (method IN ('stovetop', 'oven', 'crockpot', 'grill', 'other')),
+	minutes_total    INTEGER,
+	difficulty       TEXT    CHECK (difficulty IN ('easy', 'medium', 'hard')),
+	cuisine          TEXT,
+	is_favorite      INTEGER NOT NULL CHECK (is_favorite IN (0, 1)),
+	recipe_id        TEXT    REFERENCES recipes (id),
+	photo_id         TEXT    REFERENCES photos (id),
+	grounding_status TEXT    NOT NULL CHECK (grounding_status IN ('pending', 'grounded', 'failed', 'manual')),
+	updated_by       TEXT,
+	created_at       TEXT    NOT NULL,
+	updated_at       TEXT    NOT NULL
+);
+
+CREATE TABLE suggestion_batches (
+	id         TEXT NOT NULL PRIMARY KEY,
+	trigger    TEXT NOT NULL CHECK (trigger IN ('scheduled', 'manual', 'replenish')),
+	status     TEXT NOT NULL CHECK (status IN ('pending', 'running', 'done', 'failed')),
+	ai_run_id  TEXT REFERENCES ai_runs (id),
+	created_at TEXT NOT NULL,
+	updated_at TEXT NOT NULL
+);
+
+CREATE TABLE suggestions (
+	id                TEXT NOT NULL PRIMARY KEY,
+	dinner_id         TEXT NOT NULL REFERENCES dinners (id),
+	batch_id          TEXT NOT NULL REFERENCES suggestion_batches (id),
+	reason            TEXT NOT NULL,
+	cited_regular_ids TEXT NOT NULL, -- JSON array of dinner ids
+	status            TEXT NOT NULL CHECK (status IN ('pending', 'accepted', 'declined')),
+	decided_at        TEXT,
+	created_at        TEXT NOT NULL,
+	updated_at        TEXT NOT NULL
+);
+
+CREATE TABLE week_plans (
+	id                 TEXT NOT NULL PRIMARY KEY,
+	week_start         TEXT NOT NULL UNIQUE,
+	status             TEXT NOT NULL CHECK (status IN ('draft', 'synced', 'changed')),
+	ai_note            TEXT,
+	ai_run_id          TEXT REFERENCES ai_runs (id),
+	calendar_synced_at TEXT,
+	created_at         TEXT NOT NULL,
+	updated_at         TEXT NOT NULL
+);
+
+CREATE TABLE plan_days (
+	id                TEXT    NOT NULL PRIMARY KEY,
+	plan_id           TEXT    NOT NULL REFERENCES week_plans (id),
+	date              TEXT    NOT NULL,
+	dinner_id         TEXT    REFERENCES dinners (id),
+	is_new            INTEGER NOT NULL CHECK (is_new IN (0, 1)),
+	calendar_event_id TEXT,
+	created_at        TEXT    NOT NULL,
+	updated_at        TEXT    NOT NULL,
+	UNIQUE (plan_id, date)
+);
+
+CREATE TABLE rotation_reviews (
+	id         TEXT NOT NULL PRIMARY KEY,
+	dinner_id  TEXT NOT NULL REFERENCES dinners (id),
+	plan_date  TEXT NOT NULL,
+	status     TEXT NOT NULL CHECK (status IN ('pending', 'decided')),
+	decision   TEXT CHECK (decision IN ('keep', 'drop', 'not_made')),
+	decided_at TEXT,
+	updated_by TEXT,
+	created_at TEXT NOT NULL,
+	updated_at TEXT NOT NULL,
+	UNIQUE (dinner_id, plan_date)
+);
+
+CREATE TABLE shopping_lists (
+	id              TEXT NOT NULL PRIMARY KEY,
+	week_start      TEXT NOT NULL UNIQUE,
+	plan_id         TEXT NOT NULL REFERENCES week_plans (id),
+	title           TEXT NOT NULL,
+	status          TEXT NOT NULL CHECK (status IN ('current', 'archived')),
+	sent_to_chat_at TEXT,
+	frozen_at       TEXT,
+	created_at      TEXT NOT NULL,
+	updated_at      TEXT NOT NULL
+);
+
+CREATE TABLE shopping_groups (
+	id         TEXT    NOT NULL PRIMARY KEY,
+	list_id    TEXT    NOT NULL REFERENCES shopping_lists (id),
+	dinner_id  TEXT    NOT NULL REFERENCES dinners (id),
+	position   INTEGER NOT NULL,
+	created_at TEXT    NOT NULL,
+	updated_at TEXT    NOT NULL
+);
+
+CREATE TABLE shopping_items (
+	id         TEXT    NOT NULL PRIMARY KEY,
+	group_id   TEXT    NOT NULL REFERENCES shopping_groups (id),
+	name       TEXT    NOT NULL,
+	qty        TEXT,
+	needed     INTEGER NOT NULL DEFAULT 1 CHECK (needed IN (0, 1)),
+	position   INTEGER NOT NULL,
+	created_at TEXT    NOT NULL,
+	updated_at TEXT    NOT NULL
+);
+
+CREATE TABLE ai_settings (
+	id              INTEGER PRIMARY KEY CHECK (id = 1),
+	provider        TEXT    NOT NULL CHECK (provider IN ('openai_compatible', 'anthropic', 'ollama')),
+	base_url        TEXT    NOT NULL,
+	model           TEXT    NOT NULL,
+	temperature     REAL    NOT NULL,
+	system_prompt   TEXT,
+	api_key_ct      BLOB,
+	api_key_last4   TEXT,
+	key_verified_at TEXT,
+	created_at      TEXT    NOT NULL,
+	updated_at      TEXT    NOT NULL
+);
+
+CREATE TABLE recipe_search_settings (
+	id         INTEGER PRIMARY KEY CHECK (id = 1),
+	provider   TEXT    NOT NULL CHECK (provider IN ('searxng', 'brave')),
+	base_url   TEXT,
+	api_key_ct BLOB,
+	created_at TEXT    NOT NULL,
+	updated_at TEXT    NOT NULL
+);
+
+CREATE TABLE integrations_google (
+	id               INTEGER PRIMARY KEY CHECK (id = 1),
+	refresh_token_ct BLOB    NOT NULL,
+	calendar_id      TEXT,
+	calendar_name    TEXT,
+	connected_at     TEXT    NOT NULL,
+	last_sync_error  TEXT,
+	created_at       TEXT    NOT NULL,
+	updated_at       TEXT    NOT NULL
+);
+
+CREATE TABLE chat_settings (
+	id               INTEGER PRIMARY KEY CHECK (id = 1),
+	webhook_url_ct   BLOB    NOT NULL,
+	space_label      TEXT,
+	last_test_at     TEXT,
+	last_test_status TEXT    CHECK (last_test_status IN ('ok', 'failed')),
+	created_at       TEXT    NOT NULL,
+	updated_at       TEXT    NOT NULL
+);
+
+CREATE TABLE notification_prefs (
+	event      TEXT    NOT NULL PRIMARY KEY CHECK (event IN ('plan_ready', 'list_ready', 'day_of_reminder', 'new_suggestions', 'rotation_review')),
+	push       INTEGER NOT NULL CHECK (push IN (0, 1)),
+	chat       INTEGER NOT NULL CHECK (chat IN (0, 1)),
+	created_at TEXT    NOT NULL,
+	updated_at TEXT    NOT NULL
+);
+
+CREATE TABLE push_subscriptions (
+	id              TEXT    NOT NULL PRIMARY KEY,
+	endpoint        TEXT    NOT NULL UNIQUE,
+	p256dh          TEXT    NOT NULL,
+	auth            TEXT    NOT NULL,
+	user_agent      TEXT,
+	failure_count   INTEGER NOT NULL,
+	last_success_at TEXT,
+	created_at      TEXT    NOT NULL,
+	updated_at      TEXT    NOT NULL
+);
+
+CREATE TABLE notification_outbox (
+	id              TEXT    NOT NULL PRIMARY KEY,
+	event_key       TEXT    NOT NULL,
+	channel         TEXT    NOT NULL CHECK (channel IN ('push', 'chat')),
+	payload         TEXT    NOT NULL, -- JSON
+	status          TEXT    NOT NULL CHECK (status IN ('pending', 'sent', 'failed')),
+	attempts        INTEGER NOT NULL,
+	next_attempt_at TEXT,
+	last_error      TEXT,
+	created_at      TEXT    NOT NULL,
+	updated_at      TEXT    NOT NULL,
+	UNIQUE (event_key, channel)
+);
+
+CREATE TABLE jobs (
+	id          TEXT NOT NULL PRIMARY KEY,
+	kind        TEXT NOT NULL,
+	status      TEXT NOT NULL CHECK (status IN ('pending', 'running', 'done', 'failed')),
+	payload     TEXT NOT NULL, -- JSON
+	result      TEXT,          -- JSON, written progressively
+	error       TEXT,
+	started_at  TEXT,
+	finished_at TEXT,
+	created_at  TEXT NOT NULL,
+	updated_at  TEXT NOT NULL
+);
+
+CREATE TABLE schedule_runs (
+	id         TEXT NOT NULL PRIMARY KEY,
+	schedule   TEXT NOT NULL CHECK (schedule IN ('suggestions_weekly', 'plan_draft', 'shopping_chat_autosend', 'day_of_reminder', 'rotation_check', 'week_rollover', 'ai_runs_purge')),
+	period_key TEXT NOT NULL,
+	created_at TEXT NOT NULL,
+	UNIQUE (schedule, period_key)
+);
+
+CREATE TABLE sessions (
+	id_hash      TEXT NOT NULL PRIMARY KEY,
+	subject      TEXT NOT NULL,
+	email        TEXT NOT NULL,
+	name         TEXT NOT NULL,
+	groups       TEXT NOT NULL, -- JSON array
+	csrf_token   TEXT NOT NULL,
+	created_at   TEXT NOT NULL,
+	last_seen_at TEXT NOT NULL,
+	expires_at   TEXT NOT NULL
+);

migrations/embed.go

@@ -0,0 +1,10 @@
+// Package migrations embeds the SQL schema migrations applied at boot by
+// internal/store. Files are named NNNN_slug.sql and applied in filename order.
+package migrations
+
+import "embed"
+
+// FS holds every *.sql migration in this directory.
+//
+//go:embed *.sql
+var FS embed.FS

migrations/queries/dinners.sql

@@ -0,0 +1,57 @@
+-- name: CreateDinner :one
+INSERT INTO dinners (
+	id, name, normalized_name, status, origin, method, minutes_total,
+	difficulty, cuisine, is_favorite, recipe_id, photo_id, grounding_status,
+	updated_by, created_at, updated_at
+) VALUES (
+	?, ?, ?, ?, ?, ?, ?,
+	?, ?, ?, ?, ?, ?,
+	?, ?, ?
+)
+RETURNING *;
+
+-- name: GetDinner :one
+SELECT * FROM dinners
+WHERE id = ?;
+
+-- name: ListDinnersByStatus :many
+SELECT * FROM dinners
+WHERE status = ?
+ORDER BY normalized_name, id;
+
+-- name: UpdateDinner :one
+-- An unknown id returns sql.ErrNoRows.
+UPDATE dinners
+SET name = ?,
+	normalized_name = ?,
+	status = ?,
+	origin = ?,
+	method = ?,
+	minutes_total = ?,
+	difficulty = ?,
+	cuisine = ?,
+	recipe_id = ?,
+	photo_id = ?,
+	grounding_status = ?,
+	updated_by = ?,
+	updated_at = ?
+WHERE id = ?
+RETURNING *;
+
+-- name: ArchiveDinner :one
+-- An unknown id returns sql.ErrNoRows.
+UPDATE dinners
+SET status = 'archived',
+	updated_by = ?,
+	updated_at = ?
+WHERE id = ?
+RETURNING *;
+
+-- name: SetDinnerFavorite :one
+-- An unknown id returns sql.ErrNoRows.
+UPDATE dinners
+SET is_favorite = ?,
+	updated_by = ?,
+	updated_at = ?
+WHERE id = ?
+RETURNING *;

migrations/queries/photos.sql

@@ -0,0 +1,17 @@
+-- name: CreatePhoto :one
+INSERT INTO photos (
+	id, source_url, local_path, width, height, sha256, fetched_at,
+	created_at, updated_at
+) VALUES (
+	?, ?, ?, ?, ?, ?, ?,
+	?, ?
+)
+RETURNING *;
+
+-- name: GetPhotoBySHA256 :one
+-- Finds stored image bytes by content hash. The schema does not make sha256
+-- unique, so the earliest-created (lowest id) match is returned.
+SELECT * FROM photos
+WHERE sha256 = ?
+ORDER BY id
+LIMIT 1;

migrations/queries/recipes.sql

@@ -0,0 +1,65 @@
+-- name: UpsertRecipe :one
+-- A recipe is keyed by source_url: re-fetching the same URL updates the
+-- existing row and keeps its id and created_at, which the returned row
+-- carries. Replace its ingredients and steps in the same transaction with
+-- DeleteRecipeIngredients/DeleteRecipeSteps then the Create queries.
+INSERT INTO recipes (
+	id, source_url, site_name, title, total_minutes, prep_minutes,
+	cook_minutes, yield, raw_jsonld, fetched_at, created_at, updated_at
+) VALUES (
+	?, ?, ?, ?, ?, ?,
+	?, ?, ?, ?, ?, ?
+)
+ON CONFLICT (source_url) DO UPDATE SET
+	site_name = excluded.site_name,
+	title = excluded.title,
+	total_minutes = excluded.total_minutes,
+	prep_minutes = excluded.prep_minutes,
+	cook_minutes = excluded.cook_minutes,
+	yield = excluded.yield,
+	raw_jsonld = excluded.raw_jsonld,
+	fetched_at = excluded.fetched_at,
+	updated_at = excluded.updated_at
+RETURNING *;
+
+-- name: GetRecipe :one
+SELECT * FROM recipes
+WHERE id = ?;
+
+-- name: GetRecipeBySourceURL :one
+SELECT * FROM recipes
+WHERE source_url = ?;
+
+-- name: CreateRecipeIngredient :exec
+INSERT INTO recipe_ingredients (
+	id, recipe_id, position, raw_text, name, qty, unit, note,
+	created_at, updated_at
+) VALUES (
+	?, ?, ?, ?, ?, ?, ?, ?,
+	?, ?
+);
+
+-- name: ListRecipeIngredients :many
+SELECT * FROM recipe_ingredients
+WHERE recipe_id = ?
+ORDER BY position, id;
+
+-- name: DeleteRecipeIngredients :exec
+DELETE FROM recipe_ingredients
+WHERE recipe_id = ?;
+
+-- name: CreateRecipeStep :exec
+INSERT INTO recipe_steps (
+	id, recipe_id, position, text, created_at, updated_at
+) VALUES (
+	?, ?, ?, ?, ?, ?
+);
+
+-- name: ListRecipeSteps :many
+SELECT * FROM recipe_steps
+WHERE recipe_id = ?
+ORDER BY position, id;
+
+-- name: DeleteRecipeSteps :exec
+DELETE FROM recipe_steps
+WHERE recipe_id = ?;

migrations/queries/settings.sql

@@ -0,0 +1,128 @@
+-- name: GetHouseholdSettings :one
+-- Returns sql.ErrNoRows until the row exists.
+SELECT * FROM household_settings
+WHERE id = 1;
+
+-- name: UpsertHouseholdSettings :one
+-- Creates the single row (id 1) or replaces every column except id and
+-- created_at.
+INSERT INTO household_settings (
+	id, timezone, dinner_time, reminder_time, review_time, plan_draft_dow,
+	plan_draft_time, suggestions_dow, suggestions_time, chat_autosend_dow,
+	chat_autosend_time, onboarding_completed_at, updates_seen_at,
+	created_at, updated_at
+) VALUES (
+	1, ?, ?, ?, ?, ?,
+	?, ?, ?, ?,
+	?, ?, ?,
+	?, ?
+)
+ON CONFLICT (id) DO UPDATE SET
+	timezone = excluded.timezone,
+	dinner_time = excluded.dinner_time,
+	reminder_time = excluded.reminder_time,
+	review_time = excluded.review_time,
+	plan_draft_dow = excluded.plan_draft_dow,
+	plan_draft_time = excluded.plan_draft_time,
+	suggestions_dow = excluded.suggestions_dow,
+	suggestions_time = excluded.suggestions_time,
+	chat_autosend_dow = excluded.chat_autosend_dow,
+	chat_autosend_time = excluded.chat_autosend_time,
+	onboarding_completed_at = excluded.onboarding_completed_at,
+	updates_seen_at = excluded.updates_seen_at,
+	updated_at = excluded.updated_at
+RETURNING *;
+
+-- name: GetAISettings :one
+-- Returns sql.ErrNoRows until the row exists.
+SELECT * FROM ai_settings
+WHERE id = 1;
+
+-- name: UpsertAISettings :one
+-- Creates the single row (id 1) or replaces every column except id and
+-- created_at.
+INSERT INTO ai_settings (
+	id, provider, base_url, model, temperature, system_prompt, api_key_ct,
+	api_key_last4, key_verified_at, created_at, updated_at
+) VALUES (
+	1, ?, ?, ?, ?, ?, ?,
+	?, ?, ?, ?
+)
+ON CONFLICT (id) DO UPDATE SET
+	provider = excluded.provider,
+	base_url = excluded.base_url,
+	model = excluded.model,
+	temperature = excluded.temperature,
+	system_prompt = excluded.system_prompt,
+	api_key_ct = excluded.api_key_ct,
+	api_key_last4 = excluded.api_key_last4,
+	key_verified_at = excluded.key_verified_at,
+	updated_at = excluded.updated_at
+RETURNING *;
+
+-- name: GetRecipeSearchSettings :one
+-- Returns sql.ErrNoRows until the row exists.
+SELECT * FROM recipe_search_settings
+WHERE id = 1;
+
+-- name: UpsertRecipeSearchSettings :one
+-- Creates the single row (id 1) or replaces every column except id and
+-- created_at.
+INSERT INTO recipe_search_settings (
+	id, provider, base_url, api_key_ct, created_at, updated_at
+) VALUES (
+	1, ?, ?, ?, ?, ?
+)
+ON CONFLICT (id) DO UPDATE SET
+	provider = excluded.provider,
+	base_url = excluded.base_url,
+	api_key_ct = excluded.api_key_ct,
+	updated_at = excluded.updated_at
+RETURNING *;
+
+-- name: GetIntegrationsGoogle :one
+-- Returns sql.ErrNoRows until the row exists.
+SELECT * FROM integrations_google
+WHERE id = 1;
+
+-- name: UpsertIntegrationsGoogle :one
+-- Creates the single row (id 1) or replaces every column except id and
+-- created_at.
+INSERT INTO integrations_google (
+	id, refresh_token_ct, calendar_id, calendar_name, connected_at,
+	last_sync_error, created_at, updated_at
+) VALUES (
+	1, ?, ?, ?, ?,
+	?, ?, ?
+)
+ON CONFLICT (id) DO UPDATE SET
+	refresh_token_ct = excluded.refresh_token_ct,
+	calendar_id = excluded.calendar_id,
+	calendar_name = excluded.calendar_name,
+	connected_at = excluded.connected_at,
+	last_sync_error = excluded.last_sync_error,
+	updated_at = excluded.updated_at
+RETURNING *;
+
+-- name: GetChatSettings :one
+-- Returns sql.ErrNoRows until the row exists.
+SELECT * FROM chat_settings
+WHERE id = 1;
+
+-- name: UpsertChatSettings :one
+-- Creates the single row (id 1) or replaces every column except id and
+-- created_at.
+INSERT INTO chat_settings (
+	id, webhook_url_ct, space_label, last_test_at, last_test_status,
+	created_at, updated_at
+) VALUES (
+	1, ?, ?, ?, ?,
+	?, ?
+)
+ON CONFLICT (id) DO UPDATE SET
+	webhook_url_ct = excluded.webhook_url_ct,
+	space_label = excluded.space_label,
+	last_test_at = excluded.last_test_at,
+	last_test_status = excluded.last_test_status,
+	updated_at = excluded.updated_at
+RETURNING *;

sqlc.yaml

@@ -0,0 +1,15 @@
+# sqlc code generation. Regenerate with `make sqlc` (pinned sqlc version in the
+# Makefile); `make sqlc-check` fails when internal/db is stale. sqlc reads only
+# the top-level *.sql files of the schema directory, so migrations/queries/ is
+# not treated as schema.
+version: "2"
+sql:
+  - engine: sqlite
+    schema: migrations
+    queries: migrations/queries
+    gen:
+      go:
+        package: db
+        out: internal/db
+        sql_package: database/sql
+        emit_interface: true