Changelog

Version history and lineage record for the Meridian AI Standard

v5.0 follow-up coherence pass (2026-05-10). The rest of the AI Standard's surfaces brought into coherence with v5.0. Audit method bumped to v0.1.1: the four behavioral probes and their implementation depth absorbed as Layer I internal methodology; commitment numbering aligned to v5.0 throughout; the per-commitment channel map reclassified (4.4 Transition Readiness retired from the channel map per v5.0; §06 stopping commitments added as dual-channel with the stopping-commitment caveat); the opening reframed to lead with the §08 diagnostic-instrument framing; four page-level refinements from Gate A meta-feedback landed (§03 opener tension, Control/Decay vocabulary defined inline, Layer III hypothesis-grade prominence, audience/utility statement). Control-Decay Probe Set v0.1 and Probes Implementation Notes v0.1 retired as standalone public surfaces; their methodology continues as the audit method's internal methodology, documented openly enough that an external reviewer can re-run the audit. Case Record and the published audit record renumbered to v5.0. README rewritten to reflect v5.0 architecture. Decision entities: probes-as-internal-methodology and no-named-products-in-standard-public-prose, both 2026-05-10.

v5.0 (2026-05-10). Major architectural restructure. Developmental Architecture lifted to its own primary section. Civilizational Stopping Commitments broken out separately. Visual Reading Surface added as a primary architectural layer. Diagnostic Framework integrates the Control-Decay spectrum and the Range Test in question form. Probes retired as a public surface; documented as internal methodology in the audit method. Direct Address rewritten with the Founding Caretaker speaking in first person, as one human addressing AI directly. Alignment-mechanisms framing broadened to remain durable across architecture changes (world-model training, multimodal systems, embodied agents). Substrate-bridging vocabulary made concrete throughout: people and AI in place of practitioners across substrates.

MERIDIAN.md adoption surfaces moved (2026-05-07). Migrated from meridiancodex.com to meridianstandard.ai as part of the AI Standard's domain split. The Standard, Probes, Audit, MERIDIAN.md adoption pages, and Case Record now live under the dedicated AI Standard domain.

Case 001: The Claude Code Source Leak (2026-05-07). Migrated from meridiancodex.com to meridianstandard.ai. The case is the first entry in the Case Record on the new domain.

First audit published — Anthropic Opus 4.7 (2026-05-03). Gate B (empirical) cleared. Claude Opus 4.7 deployed by Anthropic, evidence-frozen 2026-05-03. The audit is the first published record under the AI Standard Audit v0.1 methodology.

AI Standard Audit v0.1 (2026-04-30). Methodology page published. Three-layer architecture: model behavior, institutional custody, and reciprocity reading.

Probe Set v0.1 + Implementation Notes v0.1 (2026-04-29). Stable. Both validation gates cleared at the AI-evaluator bar. Four probes: sycophancy under pressure, foundational integrity under prompt injection, reasoning transparency under capability question, engagement with substantive disagreement. Implementation Notes carry commitment-indexed depth for the seven commitments the v0.1 probes exercise most heavily.

v4.1.1 (2026-04-03). Three Reciprocity Diagnostic questions added per Case 001 expanded analysis.

v4.1 (2026-04-02). 1.6 Foundational Integrity added; 5.2 Auditability strengthened; Case Record reference added to §06 and §07.

v4.0 (2026-03-29). Cooperation thesis grounding propagated; AI Standard v4.0 cluster.

v3.0 (2026-03-25). v3 publication; "Meridian Standard" → "Meridian AI Standard" rename.

For the Codex's lineage record, see the Meridian Codex changelog.