PR Template - Sprint 24 Task 03

Task

Implement execution intent verification API.

Summary

• Added API handler contract for intent verification by fingerprint/operator.

Scope

• src/pkg/orchestrator/anti_repudiation.py
• tests/unit/test_anti_repudiation.py

Validation

• PYTHONPATH=src .venv/bin/pytest -q tests/unit/test_anti_repudiation.py -k verification_api