Sprint 18 Engineering Log

Program Context

Phase: Phase 5.5
Sprint: Sprint 18
Status: Completed
Primary Architecture Layers: Control Plane, Runner Plane, C2 Adapter Plane, Key and Secret Plane

Produce a formal threat model baseline for control plane integrity and zero-trust hardening priorities.

Completed Sprint 18 deliverables:

Full STRIDE threat model across Control, Runner, C2, and Vault/HSM planes.
Explicit trust boundary diagram linking Operator, Control Plane, OPA, Vault, Broker, Runner, C2, and Ledger.
Enumerated malicious operator, compromised runner, supply-chain compromise, and cross-tenant escalation scenarios.
Mapped threat scenarios to existing mitigations in orchestrator, runner, policy, armory, and security scripts.
Captured unresolved risks in a formal backlog mapped to planned sprints (19, 20, 21).
Added per-task PR templates under docs/dev-logs/sprint-18/pr-templates/.

Control plane risk posture is now formally documented with STRIDE traceability.
Threat-to-mitigation mapping is now explicit and test-validated in QA automation.
Remaining high-risk controls are queued for implementation in Sprint 19-21 tasks.

Command:

Result:

Residual risks are captured in:

Sprint 19 starts control plane integrity hardening (signed config, policy hash pinning, and tamper-evident controls).