# TESS-M1-OBS-001 Scratchpad

- Branch: `feat/tess-observability-terra` (the requested name is checked out by an abandoned worktree; orchestrator approved this clean branch).
- Base: `origin/main` at `e92186d7`.
- Scope: correlation propagation; metadata-only structured runtime/provider/tool audit; health/readiness; safe effective-policy status.
- Security invariant: audit and status data use an allowlist; no message bodies, credentials, approval references, tool arguments, or tool output.
- TDD: `packages/log/src/runtime-audit.test.ts` and `apps/gateway/src/health/health.controller.test.ts` failed before implementation and now pass.
- Verification: full `pnpm typecheck`, `pnpm lint`, `pnpm format:check`, and `pnpm test` passed after implementation (2026-07-12).
- Review: corrected audit sanitizer findings by hashing every resource ID. Durable audit persistence remains fail-closed by design: the pre-existing M1 provider-boundary suite requires it to prevent an unaudited side effect.