chore(release): v0.2.0

Highlights since v0.1.0:
- feat: SkillOpt-Sleep engine — nightly offline self-evolution
  (harvest -> mine -> replay -> consolidate behind a validation gate),
  with multi-objective reward, experience replay + dream rollouts,
  slow-update long-term memory, and secret redaction in cycle diagnostics.
  Shipped as the `skillopt-sleep` CLI.
- feat: cross-tool backends & plugin shells — Claude, Codex (+Desktop
  harvest), Copilot, Devin, and OpenClaw.
- feat: SearchQA split materialization + rollout fail-fast.
- fix: Windows robustness for claude/codex backends, hardened JSON
  fallback, Qwen timeout/thinking gating, Codex failure surfacing.

Packaging:
- Bump pyproject / skillopt / skillopt_sleep to 0.2.0.
- Restore skillopt_webui to the packaged wheel.

See CHANGELOG.md for the full changelog and contributor acknowledgements.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -0,0 +1,100 @@
+# Changelog
+
+All notable changes to SkillOpt are documented here. This project adheres to
+[Semantic Versioning](https://semver.org/) and the format is based on
+[Keep a Changelog](https://keepachangelog.com/).
+
+## [0.2.0] — 2026-07-02
+
+The headline of this release is **SkillOpt-Sleep**: a nightly offline
+self-evolution engine that harvests a coding agent's real session
+transcripts, mines recurring tasks, replays them offline, and consolidates
+short-term experience into long-term memory and skills — all behind the same
+held-out validation gate that keeps SkillOpt training honest. It ships as a
+decoupled top-level package (`skillopt_sleep/`, zero dependency on the
+research code) and as the new `skillopt-sleep` CLI.
+
+### Added
+- **SkillOpt-Sleep engine** — nightly offline self-evolution cycle
+  (harvest → mine → replay → consolidate) behind a validation gate, exposed
+  as the `skillopt-sleep` console script and `python -m skillopt_sleep`.
+  - Multi-objective reward (accuracy / tokens / latency) with user preferences.
+  - Multi-rollout contrastive reflection under a token/time budget.
+  - Experience replay + controllable dream rollouts (opt-in).
+  - Slow-update long-term memory field (runs even with the gate off).
+  - 3-way train/val/test split with `gate_mode on|off`.
+  - Verifier-discipline validation gate, with a stress-test suite
+    (thanks @Tanmay9223, #87).
+- **Cross-tool backends & plugin shells** for Claude Code, Codex, Copilot,
+  Devin, and OpenClaw:
+  - Codex Desktop transcript harvesting, skill-first Codex integration, and a
+    reviewed task-file flow (thanks @Kirchberg, #48, #49, #60).
+  - GitHub Copilot backend (`CopilotCliBackend`) + research-engine MCP plugin
+    (thanks @Dongbumlee, #50).
+  - Devin plugin: MCP server + ATIF-v1.7 harvest (thanks @xerxes-y, #88).
+  - OpenClaw shell for SkillOpt-Sleep (thanks @Elzlxx, #59).
+- **SearchQA** split materialization helper and fail-fast on systemic rollout
+  failures, with a `searchqa` install extra (thanks @summerview1997,
+  #63, #64, #65).
+- WebUI environment loading and backend preflight (thanks @summerview1997, #63).
+
+### Changed
+- Decoupled the Sleep engine into a standalone top-level `skillopt_sleep/`
+  package with zero dependency on the research code.
+- Made `EnvAdapter.reflect` a shared default so reflect kwargs are no longer
+  dropped (thanks @imshunsuke, #44).
+- English-only pass across the engine, plugins, and docs.
+
+### Fixed
+- Windows robustness for the Claude/Codex backends, plus a hardened JSON
+  fallback path (thanks @Yif-Yang, #79).
+- Reject prose pseudo-JSON wrapped in single quotes/backticks (#82).
+- Surface Codex auth/model/version failures instead of silently scoring 0
+  (thanks @dmmdea, #92).
+- Redact secrets before persisting cycle diagnostics.
+- Configure the `qwen_chat`/`minimax` backends so local LLM endpoints work
+  (thanks @imrehg, #85).
+- Forward the Qwen target timeout and gate `enable_thinking` for vLLM targets
+  (thanks @mvanhorn, #40).
+- Make `--bare` conditional on `ANTHROPIC_API_KEY` (#68), add a
+  `SKILLOPT_SLEEP_PYTHON` override with a lookback-hours first-run fallback
+  (#74), and fix ALFWorld gamefile paths relative to `ALFWORLD_DATA`.
+
+### Packaging
+- Bump `skillopt`, `skillopt.__version__`, and `skillopt_sleep.__version__`
+  to `0.2.0`.
+- Restore `skillopt_webui` to the built wheel (it was dropped when the
+  `packages.find` include list was made explicit).
+- Add the `searchqa` extra and include `json_repair` in the `claude`, `qwen`,
+  and `all` extras.
+
+### Acknowledgements 🙏
+v0.2.0 landed thanks to our community contributors — thank you!
+
+- @Kirchberg — Codex Desktop harvesting, skill-first Codex integration,
+  reviewed task-file flow (#48, #49, #60)
+- @Dongbumlee — GitHub Copilot backend + research-engine MCP plugin (#50)
+- @summerview1997 — SearchQA materialization, rollout fail-fast, WebUI
+  preflight (#63, #64, #65)
+- @xerxes-y — Devin plugin: MCP server + ATIF-v1.7 harvest (#88)
+- @Elzlxx — OpenClaw shell for SkillOpt-Sleep (#59)
+- @imshunsuke — shared `EnvAdapter.reflect` default + docs fixes (#43, #44)
+- @mvanhorn — Qwen timeout forwarding + `enable_thinking` gating (#40)
+- @dmmdea — surface Codex auth/model/version failures (#92)
+- @Tanmay9223 — verifier-discipline stress test (#87)
+- @imrehg — `configure_qwen_chat` for local LLM endpoints (#85)
+- @samuelgoofus-boop — community contributions
+
+Special thanks to @Yif-Yang for driving the SkillOpt-Sleep engine.
+
+**Full changelog:** https://github.com/microsoft/SkillOpt/compare/v0.1.0...v0.2.0
+
+## [0.1.0] — 2026-06-02
+
+Initial public release: the full training loop (rollout → reflect →
+aggregate → select → update → evaluate), multi-backend support
+(OpenAI / Azure / Claude / Qwen / MiniMax), six built-in benchmarks, and the
+WebUI dashboard.
+
+[0.2.0]: https://github.com/microsoft/SkillOpt/releases/tag/v0.2.0
+[0.1.0]: https://github.com/microsoft/SkillOpt/releases/tag/v0.1.0