dev_agentandClaude Opus 5.5
a10b24c86c
internal/auth discovers the provider at MEALQUEST_OIDC_ISSUER with coreos/go-oidc/v3 and runs a confidential-client authorization code flow with golang.org/x/oauth2 (client_secret_basic). GET /auth/login stores state, nonce and a PKCE S256 verifier in a 10-minute HMAC-signed HttpOnly __Host- cookie and redirects with scopes "openid profile email groups offline_access". An optional "return" path must be same-origin; anything else fails the login with 400. GET /auth/callback clears the single-use cookie, checks state, exchanges the code with the verifier, verifies the ID token (RS256 only, issuer, audience, expiry) and nonce, then hands the claims to a SessionStarter. cmd/server wires a placeholder that refuses every login until the session layer lands. Config gains required MEALQUEST_OIDC_ISSUER, MEALQUEST_OIDC_CLIENT_ID, MEALQUEST_OIDC_CLIENT_SECRET_FILE and MEALQUEST_OIDC_ALLOWED_GROUPS. Pins go-oidc v3.21.0 and oauth2 v0.36.0, the newest releases that support Go 1.25 (oauth2 v0.37.0 requires Go 1.26). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>