What problem does it solve? Code search indexes go stale as a repository changes, so agents relying on gbrain search miss new or renamed code. This Skill re-syncs gbrain against the repo's current state and updates the agent-facing guidance in CLAUDE.md so the coding agent knows when to prefer gbrain search over Grep. ## Core Features & Use Cases - Repository re-indexing: Wraps the gstack-gbrain-sync orchestrator with state probing, native code-surface registration (gbrain sources add, gbrain sync --strategy code, gbrain reindex-code), and capability checks. - Agent guidance refresh: Updates CLAUDE.md so the agent knows when to use gbrain code-def, code-refs, code-callers, and code-callees instead of plain text search. - Idempotent and re-runnable: Safe to run repeatedly; emits a verdict block reporting sync health. - Use Case: After a large refactor, run the sync so gbrain's code surface reflects the new structure and the agent stops missing symbols during search. ## Quick Start Ask the agent to sync gbrain and re-index this repository so code search reflects the current codebase.