docs: CHANGELOG — record all improvements since v0.1.0

Author: snese

CHANGELOG.md

@@ -1,5 +1,30 @@
 # Changelog
 
+## Unreleased
+
+### Improvements
+- **setup**: Idempotent — safe to re-run, detects already-installed symlinks
+- **setup**: Added `help` command and invalid argument handling
+- **setup**: `remove` reports count of removed skills
+- **README**: Added Requirements section (macOS/Linux/WSL, Bash 4+)
+- **README**: Added Verify installation, Upgrading, Uninstalling, Troubleshooting sections
+- **README**: Links to CONTRIBUTING.md and CHANGELOG.md
+- **CONTRIBUTING**: Added custom skills guide (`custom/` directory)
+- **CONTRIBUTING**: Added adversarial eval guidelines and CI section
+
+### New Features
+- **Upstream tracking**: Auto-categorizes changes as prompt/logic vs format-only
+- **CI**: Setup integration test (install → verify → remove → re-install cycle)
+- **Custom skills**: `custom/` directory gitignored for personal skills
+
+### Evals
+- **plan-product**: Added adversarial cases (vague input, overly-specific input)
+- **plan-eng**: Added adversarial cases (no context, too-broad scope)
+- **code-review**: Added adversarial cases (no code provided, trivially clean code)
+- **ship**: Added adversarial cases (not a git repo, dirty working tree override attempt)
+- **qa**: Added adversarial cases (no changes, not a git repo)
+- **retro**: Added adversarial cases (empty repo, custom time period)
+
 ## v0.1.0 (2026-03-17)
 
 Initial release. Inspired by [gstack](https://github.com/garrytan/gstack) for Claude Code, rebuilt for Kiro CLI.
@@ -14,8 +39,9 @@ Initial release. Inspired by [gstack](https://github.com/garrytan/gstack) for Cl
 
 ### Infrastructure
 - `setup` script with install / remove / verify
-- GitHub Actions: weekly upstream gstack tracking
+- GitHub Actions: CI (lint + eval validation + syntax) and weekly upstream gstack tracking
 - Eval test cases for all 6 skills
+- Issue templates (bug report, new skill proposal)
 - MIT license
 
 ### Upstream