Sprint 24 Engineering Log

Program Context

• Phase: Phase 5.6
• Sprint: Sprint 24
• Status: Completed
• Primary Architecture Layers: Control Plane, Federation Verification, Audit Plane

Architectural Intent

Close anti-repudiation gaps by binding operator identity, pre-dispatch intent, and post-dispatch verification to immutable records.

Implementation Detail

Completed Sprint 24 controls:

• Bound operator identity irreversibly into execution fingerprint generation path.
• Implemented pre-dispatch write-ahead intent ledger entries with hash chaining.
• Added execution intent verification API contract.
• Added operator-to-execution reconciliation checks.
• Added repudiation-attempt detection logic with integrity audit emission.
• Wired write-ahead intent record creation into federation bridge pre-dispatch flow.

Security and Control Posture

• Dispatch intent is now cryptographically attributable before outbound federation occurs.
• Claims that mismatch immutable intent records are detectable and auditable.
• Federation bundle includes write-ahead intent hash metadata for downstream verification.

QA and Validation Evidence

Commands:

• PYTHONPATH=src .venv/bin/pytest -q tests/unit/test_anti_repudiation.py
• PYTHONPATH=src .venv/bin/pytest -q tests/unit/test_execution_fingerprint.py
• PYTHONPATH=src .venv/bin/pytest -q tests/unit/integration/test_vectorvue_rabbitmq_bridge.py
• PYTHONPATH=src .venv/bin/pytest -q tests/qa/test_sprint24_anti_repudiation_qa.py

Risk Register

Residual risk:

• Intent ledger is currently in-memory and should be persisted into next-phase append-only Merkle ledger implementation.

Forward Linkage

Sprint 25 formalizes Merkle ledger model using unified execution fingerprint and write-ahead intent lineage.