[2.9.0] Rename plugin to compound-engineering

BREAKING: Plugin renamed from compounding-engineering to compound-engineering.
Users will need to reinstall with the new name:

  claude /plugin install compound-engineering

Changes:
- Renamed plugin directory and all references
- Updated documentation counts (24 agents, 19 commands)
- Added julik-frontend-races-reviewer to docs

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

plugins/compound-engineering/CLAUDE.md

@@ -0,0 +1,47 @@
+# Compounding Engineering Plugin Development
+
+## Versioning Requirements
+
+**IMPORTANT**: Every change to this plugin MUST include updates to all three files:
+
+1. **`.claude-plugin/plugin.json`** - Bump version using semver
+2. **`CHANGELOG.md`** - Document changes using Keep a Changelog format
+3. **`README.md`** - Verify/update component counts and tables
+
+### Version Bumping Rules
+
+- **MAJOR** (1.0.0 → 2.0.0): Breaking changes, major reorganization
+- **MINOR** (1.0.0 → 1.1.0): New agents, commands, or skills
+- **PATCH** (1.0.0 → 1.0.1): Bug fixes, doc updates, minor improvements
+
+### Pre-Commit Checklist
+
+Before committing ANY changes:
+
+- [ ] Version bumped in `.claude-plugin/plugin.json`
+- [ ] CHANGELOG.md updated with changes
+- [ ] README.md component counts verified
+- [ ] README.md tables accurate (agents, commands, skills)
+- [ ] plugin.json description matches current counts
+
+### Directory Structure
+
+```
+agents/
+├── review/     # Code review agents
+├── research/   # Research and analysis agents
+├── design/     # Design and UI agents
+├── workflow/   # Workflow automation agents
+└── docs/       # Documentation agents
+
+commands/
+├── workflows/  # Core workflow commands (/plan, /review, /work, /compound)
+└── *.md        # Utility commands
+
+skills/
+└── *.md        # All skills at root level
+```
+
+## Documentation
+
+See `docs/solutions/plugin-versioning-requirements.md` for detailed versioning workflow.