Ask a question of the local Chamber corpus and get an answer whose every claim is judged against its own citations. Each claim comes back ALLOWED (its cited passages verified against their stored hashes) or UNSUPPORTED (no verified source — recorded, not load-bearing). Cited sources are returned as file#passage references you can open. Answers only from the indexed corpus; says so when nothing matches. NOTE: this WRITES, exactly as chamber ask does — each claim goes through the commit gate, so a claim with verified citations is recorded as a belief with its pins (which is what chamber_verify later checks for drift), an unsourced assertion mints citation debt, and spend is recorded. It cannot bypass that gate, activate a skill, or approve a pending write.

Re-check every stored belief's pinned sources against the corpus as it stands now, and report the ones whose evidence moved: a source that no longer exists (not_found) or whose text changed under the pin (hash_mismatch). This is drift detection — the conclusion did not change, the ground under it did. Read-only.

Report what is actually in the index: passage and file counts, source kinds and which of them are citable, the top contributing folders, and any file far above the median passage count (the signature of an export rather than a note). Use this before trusting a 'nothing matches' answer. Read-only.