evidence-receipt-generation

name	evidence-receipt-generation
description	Generate portable evidence receipts from run artifacts. Use when users ask for ticket-ready proof, receipt footers, or integrity-backed handoff metadata.
disable-model-invocation	true

Evidence Receipt Generation

Use this skill to generate integrity-backed receipts that are portable across CI, tickets, and audit handoff.

Gait Context

Gait is an offline-first runtime for AI agents that enforces tool-boundary policy, emits signed and verifiable evidence artifacts, and supports deterministic regressions.

Use this skill when:

• incident triage needs portable receipt handoff proof
• CI gate failures require receipt/evidence attachment
• evidence outputs must be generated from Gait artifacts

Do not use this skill when:

• Gait CLI is unavailable in the environment
• no Gait run/pack artifact or run identifier is available as input

Required Inputs

• source: run id, runpack path, or pack path.
• out_path (optional): destination file for JSON receipt output.

Workflow

1. Verify integrity before receipt generation:
   • gait verify <source> --json
2. Generate receipt from source artifact:
   • when out_path is provided: gait run receipt --from <source> --json > <out_path>
   • when out_path is omitted: gait run receipt --from <source> --json
3. Parse receipt fields for handoff from out_path (if set) or stdout:
   • ok, run_id, manifest_digest, ticket_footer, bundle
4. Return concise evidence block containing:
   • source identifier
   • manifest digest
   • ticket footer text
   • verification status

Safety And Portability Rules

• Never invent digests, run ids, or receipt text.
• Treat failed verification as a blocking state for receipt publication.
• Keep receipt output machine-readable and transportable.
• Avoid environment-specific absolute paths in final handoff.

Usage Example

gait demo --json
mkdir -p ./artifacts
gait verify run_demo --json
gait run receipt --from run_demo --json > ./artifacts/receipt.json

Expected result:

• verify returns ok=true for intact artifacts
• receipt file contains a non-empty ticket_footer suitable for issue or PR evidence

Validation Example

gait demo --json
mkdir -p ./artifacts
gait run receipt --from run_demo --json > ./artifacts/receipt.json
python3 - <<'PY'
import json
from pathlib import Path
p = json.loads(Path('./artifacts/receipt.json').read_text(encoding='utf-8'))
assert p.get('ok') is True
assert str(p.get('ticket_footer', '')).strip()
print('validated receipt footer present')
PY

Expected result:

• script prints validated receipt footer present