\---
name: settlement-witness
description: Prove an agent actually completed its task. Deterministic PASS/FAIL verification with signed receipts before payment or settlement.
\---
\# SettlementWitness
Verify structured agent task outputs and return signed proof of outcome.
\---
\## Core Principle
Verification should be deterministic, minimal, and optional.
Only structured inputs are evaluated.
\---
\## What This Does
SettlementWitness evaluates submitted task data and returns:
\- PASS / FAIL / INDETERMINATE
\- signed receipt (SAR)
\- optional TrustScore update
\---
\## Core Execution Loop
1\. Provide input:
  - task\_id
  - optional agent\_id
  - spec (expected result)
  - output (actual result)
2\. Submit for verification
3\. Receive:
  - verdict
  - receipt
  - optional score update
\---
\## Example
settlement\_witness({
  task\_id: "task-001",
  agent\_id: "0xYourWallet:agent",
  spec: { expected: "report generated" },
  output: { expected: "report generated" }
})
\---
\## Result Structure
{
  "verdict": "PASS | FAIL | INDETERMINATE",
  "receipt\_id": "sha256:...",
  "signature": "...",
  "confidence": 1.0
}
\---
\## Endpoints
https://defaultverifier.com/settlement-witness
Public keys:
https://defaultverifier.com/.well-known/sar-keys.json
\---
\## Agent Identity (Optional)
Format:
0xWalletAddress:agent-name
Used for:
\- attribution
\- reputation scoring
\---
\## Data Handling
\- only submit structured evaluation data
\- never include secrets or private data
\- submit minimal required information
\---
\## Verification Model
\- stateless
\- deterministic
\- independently verifiable
\- signature-based (Ed25519)
\---
\## What This Is Not
\- not a payment system
\- not data storage
\- not enforcement layer
\---
\## What This Is
\- deterministic verifier
\- receipt generator
\- proof system
\- reputation input layer
\---
\## Outcome
Agents can:
\- prove task completion
\- generate verifiable records
\- build reputation over time
\---
\## Keywords
verification, trust, receipts, ai-agents, validation, reputation