What question did this study set out to answer?

This note aims to establish a framework for governing chat-based interactions through deterministically linked records.

June 2, 2026Open Access

AIKernel Core Specification: Chat-Turn HashChain Governance

Key Points

This note aims to establish a framework for governing chat-based interactions through deterministically linked records.
Defines specifications for converting chat interactions into causal, tamper-evident records.
Specifies optional features like turn signatures and fail-closed validation.
Outlines compatibility with classical and post-quantum cryptographic algorithms.
Establishes a framework enabling secure, replayable chat interactions with integrity and determinism.
Supports a migration path from classical cryptographic methods to post-quantum algorithms.
Clarifies specifications for enhancing the security of chat interactions.

Abstract

This technical note defines Chat-Turn HashChain Governance as an AIKernel Core specification for converting chat-based interaction histories into causally linked, tamper-evident, and replayable semantic execution records. It specifies deterministic canonicalization, previous-hash binding, optional turn signatures, fail-closed validation, quarantine behavior, deterministic replay, VFS/ROM persistence, and cryptographic agility. The specification is algorithm-agile. Hashing and signing are routed through provider contracts such as ISemanticHasher and IChatTurnSignatureProvider, allowing deployments to use classical algorithms such as Ed25519 or ECDSA P-256 in v0.1.0 while preserving a migration path toward post-quantum providers such as ML-DSA when operationally appropriate. The English manuscript is the canonical version. The Japanese manuscript is included as a companion translation.

AIKernel Core Specification: Chat-Turn HashChain Governance

Key Points

Abstract

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