Topology-Aware Chain Proofs for Human-AI Governance Substrates: Self-Contextualizing Governance Acts via Proof Bundle Assembly | APR-Lite Phase 19 — Technical Note

This record documents Phase 19 of APR‑Lite, a cryptographic governance layer designed to preserve human decision authority over AI‑influenced outputs in regulated environments. Phase 19 makes individual governance activity self‑contextualizing: given a governance reference, a caller can obtain a bundled view of the associated proof materials, including the signed act, nearby state attestations, nearby history attestations, and a linkage summary that characterizes proof completeness. Prior to this phase, the constituent proofs existed but were navigated independently. Phase 19 assembles them into a single response keyed by governance reference. The design is compositional: this phase is responsible for discovery and assembly, while an earlier phase provides the verification regime. These responsibilities remain explicitly separated so that navigation and cryptography compose without tight coupling. The linkage summary is designed for external oversight and reports on the quality of available context: whether each component is present, whether the associated state view coincides exactly with the moment of the act or is selected by proximity, and where gaps remain with explanatory context. This gives verifiers actionable insight into proof coverage without requiring familiarity with internal substrate structure. An external auditor’s complete workflow reduces to three steps: obtain a governance reference, request its associated proof bundle, and verify the components through the public proof interfaces introduced in earlier phases. No internal substrate access is required at any point. Phase 19 completes the proof arc initiated in prior work: a governance substrate that can sign its actions, attest to the evolution of its history, constrain and record its own configuration, externalize its institutional assurances, and explain its behavior with cryptographic backing meets the core requirements for regulator‑grade institutional governance. Phase 19 achieved full success on its smoke‑test suite for the extended contextualization pipeline in worker version 8.2.0‑p19.0, bringing the total across all phases to 291 tests with none failing.