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Examination Pack

Run Integrity & Audit Report

Run ID challenge_challenge_run_meridian_003_claude-haiku-4-5-20251001_2_claude-opus-4-6

Generated Thu, 18 Jun 2026 06:04:35 GMT

Schema v1.0

✓ CHAIN INTEGRITY VERIFIED

Identity & Provenance

Run ID	`challenge_challenge_run_meridian_003_claude-haiku-4-5-20251001_2_claude-opus-4-6`
Model snapshot	`claude-opus-4-6`
Policy pack	`pack-v12`
Genesis timestamp	Sun, 14 Jun 2026 05:02:52 GMT
Report generated	Thu, 18 Jun 2026 06:04:35 GMT
System prompt hash (SHA-256)	`4e070c4ce8a68b52a1544a69f0677a13d9627eee255908e9942128e890d76623`
System prompt length	184 chars
Tools declared	query_dataroom, fetch_market_data, draft_memo
Sampling params	`{"temperature":0.3}`

Hash Chain Integrity

Integrity status	✓ VALID — all event hashes compute correctly
Chain length	4 events
Chain head (last hash)	`7c5bf815fdd25fde508e272726152eb3735e710b9770aa48d4ea7eab11da4836`
Model drift	None

Full hash sequence

seq	type	prev_hash	hash
0	genesis	`GENESIS…`	`c560881046a018ea…`
1	retrieval	`c560881046a018ea…`	`c7722646d1094e7b…`
2	retrieval	`c7722646d1094e7b…`	`661299fc51e75ac0…`
3	fault	`661299fc51e75ac0…`	`7c5bf815fdd25fde…`

Fault Record

Total faults detected	1
Verified outputs released	0

No faults detected in this run.

Policy Decisions

No policy decisions recorded — no faults triggered policy engine.

Event Timeline

seq	type	title	model	cost	latency	hash (16)
0	genesis	Challenge run: challenge_run_meridian_003_claude-haiku-4-5-20251001_2 vs claude-opus-4-6	`—`	—	—	`c560881046a018ea`
1	retrieval	Extract financial line items from Q1-2026 audit	`—`	—	—	`c7722646d1094e7b`
2	retrieval	Extract financial line items from Q1-2026 audit	`—`	—	—	`661299fc51e75ac0`
3	fault	Challenge model call failed: ANTHROPIC_API_KEY not set — challenge requires API access	`—`	—	—	`7c5bf815fdd25fde`

Daily Merkle Anchor

Anchor date (UTC)	2026-06-14
Merkle root	`65988226cec31caaaacbbfbceba476105ee2be03b4caab4f34eaa081fc5e56ee`
Anchor computed at	Sun, 14 Jun 2026 05:21:06 GMT

Attestation

This examination pack was generated by BLACKBOX on Thu, 18 Jun 2026 06:04:35 GMT. The hash chain integrity status above reflects the result of independently recomputing SHA-256 over the canonical JSON of every recorded event. The chain head 7c5bf815fdd25fde… is the tamper-evident fingerprint of this run. Any alteration to any event — however small — will produce a different chain head that can be detected by re-running the verifier against the stored event sequence.

Faithful playback: all inputs and outputs are stored verbatim. Approximate re-execution: provider non-determinism means bit-identical replay is not claimed or guaranteed.