Merge branch 'main' into codex/debug-human-verify-gate-630

Resolve CHANGELOG.md conflict — keep both PR entry and v1.20.6 release notes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -9,6 +9,37 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 ### Changed
 - `/gsd:debug` flow now requires a `human-verify` checkpoint after self-verification before marking debug sessions `resolved` and moving files to `.planning/debug/resolved/`
 
+## [1.20.6] - 2025-02-23
+
+### Added
+- Context window monitor hook with WARNING/CRITICAL alerts when agent context usage exceeds thresholds
+- Nyquist validation layer in plan-phase pipeline to catch quality issues before execution
+- Option highlighting and gray area looping in discuss-phase for clearer preference capture
+
+### Changed
+- Refactored installer tools into 11 domain modules for maintainability
+
+### Fixed
+- Auto-advance chain no longer breaks when skills fail to resolve inside Task subagents
+- Gemini CLI workflows and templates no longer incorrectly convert to TOML format
+- Universal phase number parsing handles all formats consistently (decimal phases, plain numbers)
+
+## [1.20.5] - 2026-02-19
+
+### Fixed
+- `/gsd:health --repair` now creates timestamped backup before regenerating STATE.md (#657)
+
+### Changed
+- Subagents now discover and load project CLAUDE.md and skills at spawn time for better project context (#671, #672)
+- Improved context loading reliability in spawned agents
+
+## [1.20.4] - 2026-02-17
+
+### Fixed
+- Executor agents now update ROADMAP.md and REQUIREMENTS.md after each plan completes — previously both documents stayed unchecked throughout milestone execution
+- New `requirements mark-complete` CLI command enables per-plan requirement tracking instead of waiting for phase completion
+- Executor final commit includes ROADMAP.md and REQUIREMENTS.md
+
 ## [1.20.3] - 2026-02-16
 
 ### Fixed
@@ -1306,7 +1337,10 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 - YOLO mode for autonomous execution
 - Interactive mode with checkpoints
 
-[Unreleased]: https://github.com/glittercowboy/get-shit-done/compare/v1.20.3...HEAD
+[Unreleased]: https://github.com/glittercowboy/get-shit-done/compare/v1.20.6...HEAD
+[1.20.6]: https://github.com/glittercowboy/get-shit-done/releases/tag/v1.20.6
+[1.20.5]: https://github.com/glittercowboy/get-shit-done/releases/tag/v1.20.5
+[1.20.4]: https://github.com/glittercowboy/get-shit-done/releases/tag/v1.20.4
 [1.20.3]: https://github.com/glittercowboy/get-shit-done/releases/tag/v1.20.3
 [1.20.2]: https://github.com/glittercowboy/get-shit-done/releases/tag/v1.20.2
 [1.20.1]: https://github.com/glittercowboy/get-shit-done/releases/tag/v1.20.1