# Activity Log — line-0012

## Specification approval

- Issue: `fourblocks2020/trex-core#97`
- Base revision: `62e4f57c2b80ce28db87421c5e7b72a4316b8c5f`
- Branch: `feat/issue-97-outbox-idle-observability`
- Discovery `dcy-0012` was confirmed by the user after independent review PASS.
- Confirmed Discovery digest after lifecycle transition: `8a18a9d1a22d92f13f59c2b6d0ce942a3dc24d0959cf8943d1ea843a8e7e536f`.
- Specification review PASS covered `REQ-0012`, create `AC-0040`, and unchanged satisfy target `AC-0029`.
- The user explicitly approved `REQ-0012` and `AC-0040/AC-0029` from approval packet SHA-256 `f1460df034b635174f8a64d59ceec1c9f5d2c3c4f818ab4b939550e455121666`.
- Lifecycle result: `REQ-0012=approved`, `AC-0040=active`; `AC-0029` remains active and unchanged.
- No Normative Design Documents are part of the approval baseline.

## Implementation plan

1. Suppress empty-claim INFO while retaining process-lifetime counters and exact non-empty batch correlation IDs.
2. Add immutable operator metrics snapshots to spy-only slots RPC responses.
3. Add sanitized `_ledger_loop` exception observability and prove loop survival.
4. Synchronize runtime/interface documentation and run focused, full, static, ProofLine, and independent verification.
5. Deliver a pull request without production deployment or live remediation.

## Implementation and verification

- idle empty claim INFO를 제거하고 instance-local process-lifetime metric snapshot을 추가했다.
- `trex.slots.req`의 `spy=true` 응답에 metrics를 연결하고 `spy=false` 응답은 기존 shape를 유지했다.
- `_ledger_loop` unexpected writer exception을 sanitized ERROR로 기록하고 loop를 유지하도록 했다.
- `docs/runtime-flows.md`, `docs/interface-contract.md`를 구현 계약과 동기화했다.
- Focused tests: `42 passed, 16 skipped`; PostgreSQL fixture 부재로 16건은 환경 미검증이다.
- Full tests: `1267 passed, 98 skipped`; skip에는 PostgreSQL fixture 의존 테스트가 포함된다.
- Ruff, `compileall`, `proofline validate`, `git diff --check`: 통과.
- Base revision sabotage probes: old idle logging, missing snapshot, missing RPC wiring, silent daemon exception에 대해 `4 failed`로 변경 검출을 확인했다.
- 독립 구현 검토: PASS; production composition wiring을 포함해 material blocker 없음.
- 미실행: production daemon lifecycle, broker 운영, production PostgreSQL 변경 또는 재기동.
- 다음 행동: commit, remote branch push, PR 생성 및 exact head CI 확인.