Auditor evidence pack
Safety case at close
Administration · Environment Health & Safety · line AD8A · Incident to Closure. more
Chain verified
Every record links to the one before it and hashes to its stored value. 5 records were re-hashed on this page load, in order, starting from the genesis value. Nothing was read from a cached verdict.
hash = sha256(prevHash + "|" + JSON{seq, unitRef, actor, action, outcome, occurredAt})
Records
5
Append-only, sequenced
Agent actions
4
Taken by software
Human actions
1
Taken by a named person
Refusals
0
Blocked by the authority register
Corrections
0
Later record supersedes an earlier one
Legal hold
Held
HOLD-004
The unit
What the work was, and where it sits
Reference
AD8A-1019
Subject
Yuki Brennan
Requested by
Rafael Achebe
Value
$77k
Materiality
medium
Currently held by
Incident Intake Agent (agent)
Sub-function owner
Head of EHS
Orchestrator
EHS Orchestrator
Every action, in order
Actor, authority, versions in force, and the hash link to the record before it
1
Corrective Action AgenttaskCleared
Cleared investigate
2026-08-18 07:28:00ZAuthority AD8-AUTH-A1 · cap $250,000Jurisdiction UKAutonomy A1Retention OPS-3YLegal hold HOLD-004
Model
Prompt
task-execution@p21
Policy
materiality-bands@v9
Tools
document-fetch@t9, read-only-lookup@t12
in 41189980...08013eout be12e763...8aebe3artifact ART-AD8A-1002-1 genesis → 279e1f6b...5ce1a0
2
Inspection Scheduling AgenttaskCleared
Cleared root cause
2026-08-18 07:46:00ZAuthority AD8-AUTH-A1 · cap $250,000Jurisdiction UKAutonomy A1Retention OPS-3YLegal hold HOLD-004
Model
Prompt
task-execution@p21
Policy
materiality-bands@v9
Tools
document-fetch@t9, read-only-lookup@t12
in 48aa937b...21d262out 8d396375...da5fb0artifact ART-AD8A-1002-2 279e1f6b...5ce1a0 → 6725acf0...9ddebe
3
Head of EHSaccountable-ownerCleared
Cleared corrective action
2026-08-18 08:05:00ZAuthority AD8-AUTH-H1 · cap $250,000Jurisdiction UKAutonomy A0Retention OPS-3YLegal hold HOLD-004
Model
human@n-a
Prompt
human@n-a
Policy
materiality-bands@v9
Tools
none
in 6a6a00d2...ace8b3out 0a2cd3ac...aec568artifact ART-AD8A-1002-3 6725acf0...9ddebe → f51d25ab...23f8fc
4
Training Compliance AgenttaskCleared
Cleared verify
2026-08-18 08:23:00ZAuthority AD8-AUTH-A1 · cap $250,000Jurisdiction UKAutonomy A1Retention OPS-3YLegal hold HOLD-004
Model
Prompt
task-execution@p21
Policy
materiality-bands@v9
Tools
document-fetch@t9, read-only-lookup@t12
in 9f90691f...3b9737out 33458d5b...b7ad9bartifact ART-AD8A-1002-4 f51d25ab...23f8fc → 25fa61f2...a095fc
5
Hazard Sensing AgentobserveIn progress
Holding at close
2026-08-18 08:42:00ZAuthority AD8-AUTH-A1 · cap $250,000Jurisdiction UKAutonomy A1Retention OPS-3YLegal hold HOLD-004
in d8a4c49d...78392cout 211cb704...154b1fartifact ART-AD8A-1002-5 25fa61f2...a095fc → cdf0ced7...d36c93
Authority relied on
Who was allowed to do this, up to what value, in which jurisdictions
Any unit on a environment health & safety line where every intake check passed, the policy in force is current, and the value sits inside the cap below.
Cap $25,000US · UK · DEDelegated from Head of EHSExpires 2026-12-05
Anything the agent grant refuses, plus any override of an agent outcome. more
Cap $250,000US · UK · DEDelegated from Administration leadershipExpires 2027-07-19
Versions in force
Exactly what was running when these actions were taken
| Kind | Identifier | Version | Status | Owner |
|---|---|---|---|---|
| model | extract-lite | 2.9 | current | Platform model council |
| model | observe-signal | 3.1 | current | Sensing guild |
| policy | materiality-bands | v9 | current | Group controller |
| prompt | task-execution | p21 | current | Shared service engineering |
| prompt | observe-scan | p11 | current | Sensing guild |
| toolset | read-only-lookup | t12 | current | Platform engineering |
| toolset | document-fetch | t9 | current | Shared service engineering |
Gates on this line
The control points this unit had to clear
Corrective action
Held for a named human when the unit exceeds the safety case decision envelope, when confidence falls below the floor, or when a policy clause is engaged.
Approver: Head of EHS · not reached
Regulatory file
Held for a named human when the unit exceeds the safety case decision envelope, when confidence falls below the floor, or when a policy clause is engaged.
Approver: Head of EHS · not reached
Records schedule and holds
How long this evidence must be kept, and whether it is frozen
OPS-3Y3 years
Operational routing and execution
Internal operating requirement. No statutory driver, so the shortest defensible period is used deliberately.
Deleted at three years. more
HOLD-004active
Internal investigation — expense approvals
A pattern of approvals just under a materiality threshold was flagged by the observe layer and is being examined. more
Custodian Head of Internal Investigations · requested by Audit committee
What this pack proves, and what it does not
Read this before you rely on it
It does prove
- Every action carries a named actor, an actor kind, and a timestamp.
- Every action names the authority grant that permitted it and the cap that grant carries.
- Every action stamps the model, prompt, policy and tool versions in force at that moment.
- Corrections are additive. A later record supersedes an earlier one and says why more
- The chain is re-hashed live on this page, so a single altered field is detected immediately.
It does not prove
- It is not tamper-proof against an attacker with write access to the store, who could rewrite the whole chain from genesis. more
- The evidence in this demonstration is modeled from a simulated estate, not captured from production systems.
- Identity here is the actor name recorded on the action. more