chore: bump version and changelog (v0.15.9.0)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -1,5 +1,24 @@
 # Changelog
 
+## [0.15.9.0] - 2026-04-05 — OpenClaw Integration v2
+
+You can now connect gstack to OpenClaw (Wintermute) as a methodology source. OpenClaw spawns Claude Code sessions natively via ACP, and gstack provides the planning discipline and thinking frameworks that make those sessions better.
+
+### Added
+
+- **gstack-lite planning discipline.** A 15-line CLAUDE.md that turns every spawned Claude Code session into a disciplined builder: read first, plan, resolve ambiguity, self-review, report. A/B tested: 2x time, meaningfully better output.
+- **gstack-full pipeline template.** For complete feature builds, chains /autoplan, implement, and /ship into one autonomous flow. Your orchestrator drops a task, gets back a PR.
+- **4 native methodology skills for OpenClaw.** Office hours, CEO review, investigate, and retro, adapted for conversational work that doesn't need a coding environment.
+- **4-tier dispatch routing.** Simple (no gstack), Medium (gstack-lite), Heavy (specific skill), Full (complete pipeline). Documented in docs/OPENCLAW.md with routing guide for Wintermute's AGENTS.md.
+- **Spawned session detection.** Set OPENCLAW_SESSION env var and gstack auto-skips interactive prompts, focusing on task completion. Works for any orchestrator, not just OpenClaw.
+- **includeSkills host config field.** Union logic with skipSkills (include minus skip). Lets hosts generate only the skills they need instead of everything-minus-a-list.
+- **docs/OPENCLAW.md.** Full architecture doc explaining how gstack integrates with OpenClaw, the prompt-as-bridge model, and what we're NOT building (no daemon, no protocol, no Clawvisor).
+
+### Changed
+
+- OpenClaw host config updated: generates only 4 native skills instead of all 31. Removed staticFiles.SOUL.md (referenced non-existent file).
+- Setup script now prints redirect message for `--host openclaw` instead of attempting full installation.
+
 ## [0.15.8.0] - 2026-04-04 — Smarter Reviews
 
 Code reviews now learn from your decisions. Skip a finding once and it stays quiet until the code changes. Specialists auto-suggest test stubs alongside their findings. And silent specialists that never find anything get auto-gated so reviews stay fast.

VERSION

@@ -1 +1 @@
-0.15.8.0
+0.15.9.0