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/scripts/worktree-create.sh

@@ -66,18 +66,8 @@ fi
 echo "Creating worktree..."
 git worktree add "$WORKTREE_PATH" "$BRANCH_NAME"
 
-# Create symlink to .auto-build-data/ from main repo
-# This ensures specs, plans, and status are shared across worktrees
-if [ -d "$PROJECT_ROOT/.auto-build-data" ]; then
-    echo "Creating symlink to .auto-build-data/..."
-    ln -s "$PROJECT_ROOT/.auto-build-data" "$WORKTREE_PATH/.auto-build-data"
-fi
-
-# Also symlink .claude/rules/ for memory access
-if [ -d "$PROJECT_ROOT/.claude/rules" ]; then
-    mkdir -p "$WORKTREE_PATH/.claude"
-    ln -s "$PROJECT_ROOT/.claude/rules" "$WORKTREE_PATH/.claude/rules"
-fi
+# Note: No symlinks needed - specs and memory are in .auto-build/ (git-tracked)
+# The worktree automatically has access to all shared data
 
 # Update registry
 REGISTRY_FILE="$PROJECT_ROOT/.auto-build-data/worktrees/worktree-registry.json"