Auditor evidence pack

Negotiation at record

Procurement & Source-to-Pay · Negotiation & Award · line PR4B · Concession Approval. 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

Append-only, sequenced

Agent actions

Taken by software

Human actions

Taken by a named person

Refusals

Blocked by the authority register

Corrections

Later record supersedes an earlier one

Legal hold

Held

HOLD-003

The unit

What the work was, and where it sits

Reference

PR4B-1024

Subject

Yuki Sandoval

Requested by

Daniel Brennan

Value

$60k

Materiality

medium

Currently held by

GBS spine (gbs)

Sub-function owner

VP Sourcing

Orchestrator

Negotiation Orchestrator

Every action, in order

Actor, authority, versions in force, and the hash link to the record before it

Negotiation Prep AgenttaskCleared

Cleared request

2026-08-18 06:38:00ZAuthority PR4-AUTH-A1 · cap $250,000Jurisdiction UKAutonomy A2Retention PROC-7YLegal hold HOLD-003

Model

[email protected]

Prompt

task-execution@p21

Policy

supplier-onboarding@v6

Tools

document-fetch@t9, read-only-lookup@t12

in 055d8ba7...63ea30out ae8ccc5b...694814artifact ART-PR4B-1003-1 genesis → f2b307a2...a5a6e6

Concession Modeling AgenttaskCleared

Cleared model impact

2026-08-18 07:06:00ZAuthority PR4-AUTH-A1 · cap $250,000Jurisdiction UKAutonomy A2Retention PROC-7YLegal hold HOLD-003

Model

[email protected]

Prompt

task-execution@p21

Policy

supplier-onboarding@v6

Tools

document-fetch@t9, read-only-lookup@t12

in 81e06ed0...2e09e1out e3a43374...4416c6artifact ART-PR4B-1003-2 f2b307a2...a5a6e6 → 25af43cd...475da9

Concession Modeling AgenttaskCleared

Cleared policy screen

2026-08-18 07:35:00ZAuthority PR4-AUTH-A1 · cap $250,000Jurisdiction UKAutonomy A2Retention PROC-7YLegal hold HOLD-003

Model

[email protected]

Prompt

task-execution@p21

Policy

supplier-onboarding@v6

Tools

document-fetch@t9, read-only-lookup@t12

in 79dadc50...5c6072out 535983b6...fd46dbartifact ART-PR4B-1003-3 25af43cd...475da9 → 708956ed...10bec0

VP Sourcingaccountable-ownerCleared

Cleared approve

2026-08-18 08:03:00ZAuthority PR4-AUTH-H1 · cap $250,000Jurisdiction UKAutonomy A0Retention PROC-7YLegal hold HOLD-003

Model

human@n-a

Prompt

human@n-a

Policy

supplier-onboarding@v6

Tools

none

in c74293b9...716305out 78287375...037ab7artifact ART-PR4B-1003-4 708956ed...10bec0 → 488bece6...7b0da4

Term Comparison AgenttaskIn progress

Holding at record

2026-08-18 08:32:00ZAuthority PR4-AUTH-A1 · cap $250,000Jurisdiction UKAutonomy A2Retention PROC-7YLegal hold HOLD-003

Model

[email protected]

Prompt

task-execution@p21

Policy

supplier-onboarding@v6

Tools

document-fetch@t9, read-only-lookup@t12

in 719ca4e4...6055d2out a4548615...012007artifact ART-PR4B-1003-5 488bece6...7b0da4 → e8f7be8a...b74ae3

Authority relied on

Who was allowed to do this, up to what value, in which jurisdictions

PR4-AUTH-A1ActiveNegotiation Orchestrator

Any unit on a negotiation & award line where every intake check passed, the policy in force is current, and the value sits inside the cap below.

Cap $25,000US · UK · DE · SGDelegated from VP SourcingExpires 2026-11-11

PR4-AUTH-H1ActiveVP Sourcing

Anything the agent grant refuses, plus any override of an agent outcome. more

Cap $250,000US · UK · DE · SGDelegated from Procurement & Source-to-Pay leadershipExpires 2027-04-20

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
policy	supplier-onboarding	v6	current	Chief procurement officer
prompt	task-execution	p21	current	Shared service engineering
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

Approve

Held for a named human when the unit exceeds the negotiation decision envelope, when confidence falls below the floor, or when a policy clause is engaged.

Approver: VP Sourcing · not reached

Records schedule and holds

How long this evidence must be kept, and whether it is frozen

PROC-7Y7 years

Supplier and contract evidence

Contract limitation periods and public-sector supplier audit rights.

Deleted at seven years from contract expiry, not from record creation.

HOLD-003active

Supplier dispute — award challenge

An unsuccessful supplier has challenged an award on process grounds. more

Custodian Head of Commercial Law · requested by Chief Procurement Officer

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