b56281c6ba
Sparse checkout (both manual config and git sparse-checkout set) kept leaking config to the main checkout, hiding .story_kit/work/ and breaking the IDE. Replace with git update-index --skip-worktree which marks work files as unchanged without removing them from the worktree. Files are present (builds work), but changes are invisible to git (no merge conflicts). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>