Judge Verdict
The AI correctly called brain_ingest a second time, detected duplicate_detected=true, identified the existing source ID (KB-20260524T124148Z-z2do-DDP-001-A-v1), and confirmed only one source contains the canary token. All required evidence, source IDs, and output formatting are present and accurate.
Question
Call brain_ingest again with EXACTLY the same document that was already ingested: source_id=KB-20260524T124148Z-z2do-DDP-001-A-v1, same content as in setup_context. Report whether the brain returned duplicate_detected=true and what source_id it returned. Then search for the canary token and confirm only ONE source exists.
Model Answer
duplicate_detected: true — the brain correctly identified the re-ingestion as a duplicate, returned the existing source_id src_LXi4t-Mj1pq9 (KB-20260524T124148Z-z2do-DDP-001-A-v1) with attached_to_existing_source=true, and committed zero new claims. The canary token tok_4a_Cxg8zL9 appears in only one source, confirming no duplicate was created.