Every Decision, Cryptographically Verified

Each reasoning step is appended to a session-scoped ledger with a cryptographic hash linking it to the previous step. The chain is tamper-evident — any modification breaks the hash chain. Traces can be replayed, approved, and exported for regulatory review.

-- Replay an agent's reasoning chain
SELECT step_number, step_type,
       content, confidence,
       hash, previous_hash
FROM _hatidata_cot.agent_traces
WHERE session_id = 'sess_abc123'
ORDER BY step_number ASC;

-- Verify chain integrity
SELECT hati_verify_chain(
  'sess_abc123') AS valid;
-- Returns: true