docs: add CHANGELOG.md documenting extended dogfood audit (cycles #410-#424)

CHANGELOG.md

@@ -0,0 +1,61 @@
+# Changelog
+
+All notable changes to claw-code are documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html) (currently pre-1.0).
+
+## [Unreleased] — 2026-04-26 to 2026-04-27 (extended dogfood audit cycles)
+
+Branch: `feat/jobdori-168c-emission-routing`
+
+### Added — Documentation
+
+- **CHANGELOG.md** — This file (cycle #424)
+- **docs/PINPOINT_FILING_GUIDE.md** — Step-by-step pinpoint filing workflow with #290 worked example (cycle #422)
+- **docs/SUPPORTED_PROVIDERS.md** — Documents 4 providers (Anthropic, xAI, DashScope/Qwen/Kimi, OpenAI/compat) from MODEL_REGISTRY (cycle #420)
+- **TROUBLESHOOTING.md** — Operational guidance for 5 critical failure modes (#286, #287, #289, #290, #291) (cycles #418, #423)
+- **ROADMAP.md Pinpoint Cluster Index** — Navigation aid for 8 named clusters (cycle #421)
+- **ROADMAP.md Extended Dogfood Audit Summary** — Cycles #388-#415 overview (cycle #416)
+- **README.md Contributing section** — Unified navigation to SECURITY/ROADMAP/CONTRIBUTING/ISSUE_TEMPLATE (cycle #415)
+- **SECURITY.md** — Responsible-disclosure stub with reporting via GitHub Security Advisories (cycle #414)
+- **CONTRIBUTING.md** — Codifies pinpoint filing format, build commands, branch naming (cycle #411)
+- **.github/ISSUE_TEMPLATE/pinpoint.md** — Discoverable canonical issue template (cycle #412)
+- **LICENSE** — Root MIT license file (cycle #410)
+
+### Fixed — Code
+
+- **#256** — Anthropic tool-result request ordering (pre-audit)
+- **#122b** — `claw doctor` broad-path warning
+- **#160** — Reserved-semantic-verb slash-command guidance
+
+### Filed — Pinpoints (ROADMAP.md)
+
+46 pinpoints filed (#241-#291) during extended dogfood audit. New clusters identified:
+- **Auto-compaction (4-deep):** #283, #287 (CRITICAL), #288, #289
+- **Transport / Provider Resilience:** #266, #285, #290, #291
+- **Provider Infrastructure:** #245, #246, #285
+- **Tool Lifecycle / Hooks:** #254, #268, #274, #280, #286
+- **CLI Dispatch:** #262, #267, #272, #282, #283
+- **Persistence / Migration:** #278, #279
+- **Provenance Consolidation:** #259, #271, #273, #275
+- **Slash-command Contract:** #284
+
+See [ROADMAP.md](./ROADMAP.md#pinpoint-cluster-index) for full list.
+
+### Live evidence integrated
+
+- @Sigrid Jin: license verification, ultraplan functionality, provider-config source-of-truth → pinpoints #284, #285
+- gaebal-gajae sustained `500 empty_stream` (11+ incidents in 3hr+) → pinpoints #290, #291
+
+---
+
+## Process
+
+This release demonstrates the pinpoint-driven workflow:
+1. **Identify friction** during real claw-code usage
+2. **File pinpoint** to ROADMAP.md with canonical 5-section format
+3. **Ship docs/code fix** when concrete delta is small
+4. **Cluster pinpoints** to expose architectural patterns
+5. **Document mitigations** in TROUBLESHOOTING.md
+
+See [docs/PINPOINT_FILING_GUIDE.md](./docs/PINPOINT_FILING_GUIDE.md) for details.

README.md

@@ -198,6 +198,7 @@ cargo test --workspace
 - [`PARITY.md`](./PARITY.md) — parity status for the Rust port
 - [`rust/MOCK_PARITY_HARNESS.md`](./rust/MOCK_PARITY_HARNESS.md) — deterministic mock-service harness details
 - [`ROADMAP.md`](./ROADMAP.md) — active roadmap and open cleanup work
+- [`CHANGELOG.md`](./CHANGELOG.md) — history of notable changes by dogfood cycle
 - [`PHILOSOPHY.md`](./PHILOSOPHY.md) — why the project exists and how it is operated
 
 ## Ecosystem