hald

Use when the user asks to index, re-index, or set up Hald for their repository, when a query tool returns an error indicating no index exists, when the user asks about index status or freshness, or when they mention "hald" in the context of setup or configuration.

Use when the user asks about code ownership or expertise ("who knows...", "who should review..."), architectural decisions ("why did we...", "what was the reason for..."), code history or evolution ("how did ... evolve", "history of..."), module coupling or dependencies ("what depends on...", "what changes together..."), knowledge silos or bus factor ("who's the only person who knows...", "what if X leaves"), entity relationships ("how is X connected to Y"), or codebase overview ("tell me about the architecture", "what are the main components"). Use for any question that requires understanding the repository's history beyond what's in the current code.