FromSettings errors and the configured provider's request-validation errors now pass through a presets redactedError: its text has the key removed with llm.Redact, it does not unwrap to the unredacted layers, and Is still matches the llm sentinels. A key that equals a request value (temperature -0.5) or a setting no longer appears in the error. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>