fix: Symlink .auto-build-data/ and .claude/rules/ in worktrees

Worktrees now have symlinks to the main repo's:
- .auto-build-data/ - specs, plans, status, memory
- .claude/rules/ - auto-build patterns and learned memory

This ensures /ab:build can detect PLANNING_COMPLETE status when
running in worktree and continue with implementation.

Also clarified in build.md that PLANNING_COMPLETE skips planning.

Bumps version to 1.0.5.

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

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

plugin/scripts/worktree-create.sh

@@ -66,6 +66,19 @@ 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" "$WORKTREE_PATH/.claude/rules"
+fi
+
 # Update registry
 REGISTRY_FILE="$PROJECT_ROOT/.auto-build-data/worktrees/worktree-registry.json"
 TIMESTAMP=$(date -u +"%Y-%m-%dT%H:%M:%SZ")