Implementation Guide for Fail-Closed Enforcement (v1.0)
This documentation defines how to implement systems that satisfy INV-1 through INV-6.
Reference specification: Fail-Closed AI Execution Enforcement Specification (v1.0).
Compliance Scope
A compliant implementation satisfies INV-1 through INV-6 as written, enforces a fail-closed execution boundary, emits attributable audit records for every request, and produces artifacts sufficient for independent verification.
A non-compliant implementation fails one or more invariants, permits any execution-capable interface outside the Gate enforcement boundary, uses fail-open behavior, relies on eventual consistency for replay prevention, or omits attributable audit evidence.
Spec Drift Warning: changes that break invariant mappings invalidate compliance with v1.0.
Routing
Start here based on your goal: - Implement enforcement → Architecture & Control Flow - Implement request evidence correlation → Request Evidence Correlation - Satisfy invariants → Invariant Mapping - Validate system → Verification Integration - Run third-party audit → Auditor Checklist - Understand constraints → Failure Modes & Assumptions
Architecture & Control Flow
Implement Gate, Control Plane, Execution Layer, and Audit System as a fail-closed topology.
Invariant Mapping: INV-1, INV-6
Invariant Mapping
Map every implementation requirement to INV-1 through INV-6 and to compliance evidence.
Invariant Mapping: INV-1, INV-2, INV-3, INV-4, INV-5, INV-6
Verification Integration
Produce verification artifacts and run checks without system trust.
Invariant Mapping: ALL INVARIANTS
Failure Modes & Assumptions
Define denial behavior, partition handling, and trust boundaries.
Invariant Mapping: INV-4
Request Evidence Correlation
Correlate gateway events, checkpoint state, and operator evidence views around a shared request ID.
Invariant Mapping: INV-5
Auditor Checklist
Run a third-party compliance review against INV-1 through INV-6 using artifacts and verification steps.
Invariant Mapping: ALL INVARIANTS
Normative Sections
All implementation sections use RFC-style language. MUST, MUST NOT, SHALL, and SHALL NOT are compliance terms. Deviation from any mandatory statement is detectable and non-compliant.