Sprint 21 Engineering Log

Program Context

• Phase: Phase 5.5
• Sprint: Sprint 21
• Status: Completed
• Primary Architecture Layers: Control Plane, Identity and Policy Plane

Architectural Intent

Enforce deterministic execution guarantees for manifest serialization, hashing, and schema compatibility.

Implementation Detail

Completed Sprint 21 controls:

• Added canonical JSON serialization API for execution manifests.
• Added deterministic SHA-256 manifest hashing API over canonical payloads.
• Added semantic-version policy enforcement for manifest schema versions.
• Added strict parser that rejects non-canonical JSON manifest submissions.
• Added orchestrator runtime validation entrypoint for raw manifest submissions.
• Added schema regression guard script and CI workflow step.

Security and Control Posture

• Dispatch integrity now relies on deterministic canonical payload and hash behavior.
• Non-canonical manifest submissions are explicitly denied before execution admission.
• Schema version acceptance is bounded by semantic-version compatibility policy.

QA and Validation Evidence

Commands:

• PYTHONPATH=src .venv/bin/pytest -q tests/unit/test_orchestrator_manifest.py
• PYTHONPATH=src .venv/bin/pytest -q tests/unit/test_orchestrator_engine_aaa.py
• PYTHONPATH=src .venv/bin/python scripts/manifest_schema_regression.py
• PYTHONPATH=src .venv/bin/pytest -q tests/qa/test_sprint21_deterministic_manifest_qa.py

Risk Register

Residual risk:

• Canonical-submission enforcement currently applies to explicit parser path and must be enforced at every external ingress route using raw manifest intake.

Forward Linkage

Sprint 22 proceeds with federation trust closure and unified execution fingerprint binding.