add: CHANGELOG.md for v0.1.0

Author: snese

CHANGELOG.md

@@ -0,0 +1,22 @@
+# Changelog
+
+## v0.1.0 (2026-03-17)
+
+Initial release. Inspired by [gstack](https://github.com/garrytan/gstack) for Claude Code, rebuilt for Kiro CLI.
+
+### Skills
+- **plan-product** — Product thinking mode: rethink the problem, find the 10-star version
+- **plan-eng** — Engineering planning: architecture diagrams, failure modes, test matrix
+- **code-review** — Paranoid code review: find bugs that pass CI but explode in prod
+- **ship** — One-command shipping: sync → test → push → PR
+- **qa** — QA testing: diff-aware, health score, severity classification
+- **retro** — Engineering retrospective: data-driven, actionable
+
+### Infrastructure
+- `setup` script with install / remove / verify
+- GitHub Actions: weekly upstream gstack tracking
+- Eval test cases for all 6 skills
+- MIT license
+
+### Upstream
+- Tracking gstack at `3e3843c`