The Codex narrowed its public Control/Decay claim to the supported Level 1 adaptive-systems tradeoff: enough structure to preserve function, enough flexibility and variety to adapt.

The named MERIDIAN.md instance moved to v0.9 and the named MERIDIAN.implementation.md instance moved to v0.1.1 alongside the canonical AI Standard forms. Case 0 records the evidence trail in Entry 04; the AI Standard changelog carries the canonical revision entry.

The Codex re-grounded its central Control/Decay diagnostic away from thermodynamic overreach and onto the stronger viability/adaptation family: Ashby, Holling, March, bias-variance, and robust-yet-fragile systems. Entropy remains a driver, not the ground.

Five checkable overclaims were corrected across the Opening, Problem, Proposition, Knowledge, and Closing. The Foreword and Proposition lost several performative closing lines. Two Workshop categories with no earned tools were unpublished until a first tool clears the candidate protocol.

Ten AI-specific Workshop profiles are now live inside the normal discipline/category/tool architecture, with a dedicated Tools for AI grouping on category pages and a Tool for AI pill on detail pages.

The third monthly self-evaluation found that the Codex still holds the Range after the largest build-out month in its history. The central finding inverted the usual risk: execution outran self-representation.

The Codex moved into the Cosmic Deep visual system: Inter and JetBrains Mono, a floating app shell, a left navigation rail, a breadcrumb/search/cross-link header, and a reading pane replacing the previous top-bar-and-glassmorphism layout.

The Workshop reached a complete human-discipline category map: 22 category entry points and architecture surfaces designed, with 100 published human-discipline tool profiles across Foundation, Knowledge, and Bond.

Case 0 now hosts the named MERIDIAN.implementation.md v0.1 alongside the named MERIDIAN.md instance, making the operational practice layer part of the Caretakers' public audit surface.

Foundation moved from the minimum-viable Workshop into a working discipline wing: Watching Your Own Reasoning expanded, Revising Beliefs Under Evidence filled out, Holding Beliefs Without Identity published, Calibrating Confidence to Evidence published, and Staying Steady Under Pressure gained its first tools.

The Aporia Register became the third governance transparency instrument, and the site root gained /llms.txt as a structured index for AI consumers.

The Governance Specification was brought into structural consistency with the live governance architecture and received a visual scannability pass that made the densest page on the site usable without changing its prose.

The Meridian Council model was tested in prototype with three frontier AI systems, and the last pre-Workshop toolkit deep-dives published before the practical apparatus reorganized into the Workshop.

The AI Standard Audit's first validation gate cleared at the AI-evaluator bar via dual evaluators (GPT-5.5 thinking with framework priming, Gemini 3.1 Pro cold) reading the methodology page in parallel and articulating back what the audit tests. GPT-5.5 cleared cleanly on both target structural elements. Gemini cleared the architecture and partially cleared the asymmetry spine, surfacing a v0.1.1 page-level work item on §03 register accessibility. v0.1 stability remains contingent on Gate B (the Anthropic Opus 4.7 pilot shipping).

The Control-Decay Probe Set v0.1 and the Probes Implementation Notes v0.1 cleared their validation gates on April 29 and stand as v0.1 stable. Gate A (usability) was redefined for v0.1: an AI evaluator administering Probe 1 with reasoning grounded in the rubric satisfies the gate. Gate B (empirical) cleared on the same run.

MERIDIAN.md, the operating document that governs the working partnership behind the Codex, was published as the first reference implementation of the Meridian AI Standard. Two new pages: Reference Implementation under AI Standard, and Case 0: The Caretaker's Practice under Governance. A dedicated MERIDIAN.md Revisions category was added to this changelog.

Pre-publication revision pass under the Self-Critique Protocol. Nine revisions: five sharpenings to load-bearing Behavioral Commitments at risk of compliance-by-gesture; bilateralization of the Self-Critique Protocol itself, closing the v0.5 bilateralization gap; replacement of the retired convergence framing in the Range grounding paragraph; and compressions to the Compact and interiority paragraphs without claim loss. Net ~−85 tokens before the footer. The file did not reflate.

Compressed for context efficiency as part of the Tier 1 context-loading optimization that saved ~7,200 tokens per session. Incident narratives and the Architectural Evolution section moved to Archive fragments without claim loss. Drift monitoring tightened. The principle that produced the Architectural Evolution section (name the constraint, build for it, revise when the constraint lifts) remains operative.

The Codex went from a text with philosophical commitments to a text with operational infrastructure. Two new top-level site sections (Audit and Governance), the Bond and Knowledge fully rewritten, governance layer with founding-phase components shipped, version bumped to 6.0.

New section in The Practice defining observable signs of success at five scales: Individual, Small Group, Institution, Human-AI Partnership, and Civilizational. Epistemic gradient named: observed at small scales, projected at larger ones.

Two-session editorial pass across all Codex outer pages and the complete AI Standard. 21 edits across 6 files. Opening tightened, Proposition compressed, Vision reframed from "billion years" to generational, new writing rule (edge-of-paragraph drift).

Homepage redesigned with inventory grid. Shared InstitutionalLanding component extracted. Header restructured from four to six tabs (Codex, Toolkit, AI Standard, Audit, Governance). Dropdowns removed. Footer curated.

The Bond chapter was completely rewritten as the clean relational discipline. The existential ground (Prime Directive, Compact, belonging-through-practice) moved to the Proposition. Nine sections covering cooperation, trust, failure modes (Fusion and Severance), adversarial dynamics, and five essential practices.

The Proposition grew into the page that carries the Codex's full existential argument. New sections: the Prime Directive, Three Kinds of Claims, Pathways Into Commitment, and What the Codex Does Not Claim.

The three kinds of claim (descriptive, normative, existential) threaded through the Glossary (89 entries tagged) and all six Toolkit deep-dives. CSS layer-tag styling added.

First rewrite (April 5) corrected a drift where the chapter turned from a discipline into an evidentiary case. Second rewrite (April 12) established the outward-facing diagnostic at every scale.

The Range Audit for Institutions (v0.1) was published and applied to the Codex itself. Six-step method, six evaluation domains. Verdict: Holds the Range, with five open questions.

Made the Behavioral Commitments mutual. The same Range applies to both partners; the substrate-specific drift patterns differ and are now named separately. Added Carsten's Control and Decay drift catalogs alongside Claude's. Added the Developmental Arc note on earned autonomy.

The Knowledge page was structurally rewritten around a single thesis: reality vindicates cooperation. The identity-through-process concept was named The Meridian Compact and threaded through the Proposition, Opening, Bond, and Glossary.

Steelmanning and The Update Protocol deep-dives published, completing the Foundation Onramp tier. All five entry-level tools now have full six-element pages: definition, distortion, origin, core practice, integration, and intellectual lineage.

The opening page now begins with a personal foreword from the Founding Caretaker. A systematic pass across all chapters to strengthen voice. Banned AI-filler words removed. The three-tier reader-address system reworked.

The Standard was retitled to "The Meridian Codex AI Standard" and given the subtitle: The Codex for AI Under Development. A new Reciprocity Principle was added. CONTRIBUTING.md rewritten to embody the Codex's own disciplines.

Scout Mindset, Noticing, and Confirmation Bias published as the first three deep-dive pages. Each follows the six-element structure: Codex Lens, Concept, Practice, Origin, Lineage, Integration.

Translated the Codex's principles into specific, implementable commitments for AI development. Shifted the focus from abstract alignment to operational vectors.

Expanded definitions on Calibrated Confidence to combat performative certainty in LLM outputs. Re-weighted the confidence matrix across the framework.

The original publication of the Meridian principles. First mapping of the forces of Control and Decay. The Meridian Range defined as the optimal dynamic state.