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/commands/migrate.md

@@ -0,0 +1,141 @@
+---
+description: Migrate from old .auto-build-data/ structure to new .auto-build/ structure
+---
+
+# Migrate Auto-Build Data
+
+Migrate specs and memory from the old `.auto-build-data/` location to the new `.auto-build/` location for team collaboration.
+
+## When to Use
+
+Run this command if you have an existing project that was using Auto-Build v1.0.5 or earlier, where specs and memory were stored in `.auto-build-data/` (gitignored).
+
+## What It Does
+
+1. **Moves specs**: `.auto-build-data/specs/` → `.auto-build/specs/`
+2. **Moves memory**: `.auto-build-data/memory/` → `.auto-build/memory/`
+3. **Keeps local data**: `.auto-build-data/worktrees/` and `.auto-build-data/cache/` stay local
+4. **Updates .gitignore**: Ensures only `.auto-build-data/` is ignored
+
+## Workflow
+
+### 1. Check for Existing Data
+
+First, check if migration is needed:
+
+```bash
+# Check if old structure exists
+ls -la .auto-build-data/specs/
+ls -la .auto-build-data/memory/
+```
+
+If `.auto-build-data/specs/` or `.auto-build-data/memory/` exist with data, proceed with migration.
+
+### 2. Create New Structure
+
+```bash
+mkdir -p .auto-build/specs
+mkdir -p .auto-build/memory/sessions
+```
+
+### 3. Move Specs
+
+```bash
+# Move all feature specs
+if [ -d ".auto-build-data/specs" ] && [ "$(ls -A .auto-build-data/specs)" ]; then
+    mv .auto-build-data/specs/* .auto-build/specs/
+    echo "Moved specs to .auto-build/specs/"
+fi
+```
+
+### 4. Move Memory
+
+```bash
+# Move memory files
+if [ -f ".auto-build-data/memory/patterns.json" ]; then
+    mv .auto-build-data/memory/patterns.json .auto-build/memory/
+fi
+
+if [ -f ".auto-build-data/memory/gotchas.json" ]; then
+    mv .auto-build-data/memory/gotchas.json .auto-build/memory/
+fi
+
+if [ -d ".auto-build-data/memory/sessions" ] && [ "$(ls -A .auto-build-data/memory/sessions)" ]; then
+    mv .auto-build-data/memory/sessions/* .auto-build/memory/sessions/
+fi
+
+echo "Moved memory to .auto-build/memory/"
+```
+
+### 5. Initialize Missing Files
+
+If memory files don't exist, create them:
+
+```bash
+if [ ! -f ".auto-build/memory/patterns.json" ]; then
+    echo '{"patterns": [], "updated": null}' > .auto-build/memory/patterns.json
+fi
+
+if [ ! -f ".auto-build/memory/gotchas.json" ]; then
+    echo '{"gotchas": [], "updated": null}' > .auto-build/memory/gotchas.json
+fi
+```
+
+### 6. Update .gitignore
+
+Ensure `.gitignore` only ignores `.auto-build-data/`:
+
+```bash
+# Remove old entries if present
+grep -v "^\.auto-build-data/" .gitignore > .gitignore.tmp && mv .gitignore.tmp .gitignore
+
+# Add correct entry
+if ! grep -q "^\.auto-build-data/" .gitignore; then
+    echo "" >> .gitignore
+    echo "# Auto-Build local data (worktrees, cache)" >> .gitignore
+    echo ".auto-build-data/" >> .gitignore
+fi
+```
+
+### 7. Display Summary
+
+```
+════════════════════════════════════════════════════════════════
+  Migration Complete
+════════════════════════════════════════════════════════════════
+
+✅ Specs moved to .auto-build/specs/
+✅ Memory moved to .auto-build/memory/
+✅ .gitignore updated
+
+New structure (committed to git):
+  .auto-build/
+  ├── specs/{feature-name}/
+  │   ├── spec.md
+  │   ├── plan.md
+  │   └── status.json
+  └── memory/
+      ├── patterns.json
+      ├── gotchas.json
+      └── sessions/
+
+Local data (gitignored):
+  .auto-build-data/
+  ├── worktrees/
+  └── cache/
+
+NEXT STEPS:
+1. Review the migrated files
+2. Commit the new .auto-build/ directory:
+   git add .auto-build/
+   git commit -m "chore: Migrate auto-build specs and memory for team sharing"
+3. Push to share with your team
+
+════════════════════════════════════════════════════════════════
+```
+
+## Notes
+
+- This migration is **one-way** - the old structure is not preserved
+- After migration, specs and memory are **version controlled** and shared with your team
+- Worktrees remain local as they are machine-specific