feat: Move specs and memory to git for multi-developer collaboration (v1.0.6)

BREAKING CHANGE: Specs, plans, and memory moved from .auto-build-data/ (gitignored)
to .auto-build/ (git-tracked) to enable team collaboration.

Changes:
- Specs/plans now in .auto-build/specs/ (shared with team)
- Memory (patterns, gotchas) now in .auto-build/memory/ (shared with team)
- .auto-build-data/ now only contains local data (worktrees, cache)
- Added /ab:migrate command for existing projects
- Removed symlinks from worktree-create.sh (no longer needed)

Benefits:
- Any developer can continue a plan started by another
- Patterns and gotchas shared across team
- Works on Windows/Linux/Mac without symlinks
- Full version history in git

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugin/rules/auto-build-patterns.md

@@ -10,8 +10,9 @@ These rules apply to all Auto-Build related files and workflows.
 
 ### 1. Portability First
 - All paths must be relative or dynamically determined
-- No hardcoded project-specific values in .auto-build/
-- Data lives in .auto-build-data/ which is gitignored
+- No hardcoded project-specific values
+- Shared data (specs, plans, memory) lives in `.auto-build/` (git-tracked)
+- Local data (worktrees, cache) lives in `.auto-build-data/` (gitignored)
 
 ### 2. Minimal Footprint
 - Never modify files outside the current task scope
@@ -29,7 +30,7 @@ These rules apply to all Auto-Build related files and workflows.
 - Always analyze the codebase before writing spec
 - Include at least 3 acceptance criteria
 - Identify affected files explicitly
-- Save to .auto-build-data/specs/{name}/
+- Save to `.auto-build/specs/{name}/` (git-tracked, shared with team)
 
 ### When Running /ab:build
 - Check for existing spec before proceeding
@@ -89,17 +90,21 @@ SPEC_DRAFT → SPEC_COMPLETE → PLANNING → PLANNING_COMPLETE →
 IMPLEMENTING → IMPLEMENTATION_COMPLETE → QA_REVIEW → COMPLETE
 ```
 
-### Memory Files
-- patterns.json: Reusable code patterns
-- gotchas.json: Problems and solutions
-- codebase-map.json: Structural insights
-- sessions/*.json: Session history
+### Memory Files (`.auto-build/memory/` - git-tracked)
+- patterns.json: Reusable code patterns (shared with team)
+- gotchas.json: Problems and solutions (shared with team)
+- sessions/*.json: Session history (shared with team)
+
+### Local Data Files (`.auto-build-data/` - gitignored)
+- worktrees/worktree-registry.json: Local worktree tracking
+- cache/qa-iterations/*.json: Temporary QA cache
 
 ## Git Worktree Rules
 
 - Create worktrees outside project: ../ab-worktrees/
 - Branch naming: feature/ab-{feature-name}
-- Registry tracking in worktree-registry.json
+- Registry tracking in `.auto-build-data/worktrees/worktree-registry.json`
+- No symlinks needed - specs/plans/memory are in git, available in all worktrees
 - Cleanup only merged branches automatically
 
 ## Error Handling