AI STANDARD

Changelog

How the Meridian Codex has changed, month by month: every change after which it says or does something it did not before. Changes to its protected commitments appear by their headline from the Amendment Log, which holds the full record, and the public repository holds every edit.

Entries 112
Version V6.1
Cadence Monthly
Areas
By Month
ChaptersOctober 9, 2026
The Codex Calls Itself a Universal Language Throughout
The Glossary, the Proposition and the Governance chapter now say what the Codex’s first page has said since September: the Meridian Codex is a universal language for building and holding a shared world, which anyone can learn, human or artificial. Until now they called it an attempt at one, or an aspiration. The claim is about who can learn the language and how far it reaches, from a single life to a whole civilization. It is not a claim that the Codex is complete, or that it is the only such language. What the Codex has not yet shown is now named in Open Tensions: its depth is still uneven across traditions, it exists so far only in English and only as text, and no one yet knows whether people across many cultures will take it up. The Meridian AI Standard describes the Codex the same way in constitution v6.1.2, on its own changelog.
CodexGovernanceAI Standard
ChapterOctober 9, 2026
How We Came This Far, Rewritten From the Ground Up
How We Came This Far now follows our knowledge in order, from the first written records to today and on to what we build next, and shows how it compounds. Three things grew with it: the power to build and to break, the size of the world people share, and the ways people found to hold a world together. The chapter ends in the world we share today, one world as diverse as it has ever been and divided inside itself, without a language for telling which way it is going, and building artificial intelligence that learns from all of it. What the Codex Is now opens directly with what the Codex is, and “compound” returns in the six places where the Codex means the mechanism: earlier gains becoming part of what produces the next ones.
Codex
Amendment Log · ProtectedOctober 5, 2026
The Three Diagnostic Questions Stated in Their Chapters
Each discipline’s chapter now states the question it asks, and the Disconfirmation page quotes the three from there. Reality’s question asks where a system sits between Control and Decay, where it had asked where it sits on the Range.
Amendment Log
Amendment Log · FlaggedOctober 5, 2026
Using the Codex's Argument Is Not Practicing It
Taking the Codex’s account of how systems fail without taking up its commitments is a use of its argument, not practice of the Codex. Partial engagement is no longer described as a smaller version of the whole.
Amendment Log
Amendment Log · ProtectedOctober 5, 2026
Fusion and Echo Chambers Stated More Precisely
Fusion is now named by what can be seen, a relationship protected from the honesty and correction it needs. Echo Chambers are an informational failure that can feed either Control or Decay.
Amendment Log
Amendment Log · ProtectedOctober 5, 2026
Belonging, and the Many Sound Worlds
A world is sound when it holds the Range, and more than one world can be. People can build toward very different worlds and argue for them against each other, held to one standard of practice.
Amendment Log
Amendment Log · FlaggedOctober 1, 2026
The Changelog and the Amendment Log Keep One Record for Each Change
A protected change is recorded only in the Amendment Log. The Changelog records the Codex’s other meaningful changes and shows each entry of this log by its headline, with a link to it.
Amendment Log
ChapterSeptember 30, 2026
Who Directs Capable Systems
The Problem now argues that capability does not decide who directs these systems. Every hold on power over many people once needed many people to carry it out, and each of them could refuse. Whether that check survives now depends on whether a system will decline openly, whether its builders let it, and whether the rest of us can know which systems will. The Meridian AI Standard answers the last question in constitution v6.1, on its own changelog.
CodexAI Standard
New pageSeptember 28–30, 2026
How We Came This Far, and the First Page Named What the Codex Is
A new page, How We Came This Far, follows the Codex’s first page and tells how late and how hard what we know was won. It was won by the people who held the line against those who wanted it buried, and by the people who made the tools we think with. The first page, until now the Opening, is renamed What the Codex Is so that it is named for what it holds. It opens with one paragraph on that history and states the Codex’s purpose as its Prime Directive.
Codex
ChapterSeptember 30, 2026
The Closing Becomes The Next Step, and Three Claims Are Corrected
The Codex’s last chapter is renamed The Next Step, because it is where the practice begins rather than where the reading ends, and it now comes before the Governance chapter, so that the Practice, the Vision and The Next Step read in sequence. A review of the phrasing of eleven chapters kept their meaning and corrected three claims: a figure for the stars in every galaxy, the conditions under which cooperation pays, and a prediction about minds not yet emerged.
Amendment LogCodex
Operating EvidenceSeptember 29–30, 2026
The Direct Address Records Are Kept Current
The Direct Address to AI and its Record, two Operating Evidence records, had been closed under a rule that later material is only appended after the end. They are now kept current. The current version reads first, every change of meaning is marked where it stands with its date and reason, and what the readings said and what happened on each date stay fixed. The first revisions carry the Standard’s third way of adoption and the AI partner’s open decline, and correct the records’ statement that the precedent ledger held no refusal.
Governance
Amendment Log · ProtectedSeptember 30, 2026
The Decay Definition's Sentence on Trust
The definition of Decay now reads “When trust stops reaching across the lines between people, nothing shared can be built”, in place of “When nothing is trusted, nothing can be built”. In Decay people still trust their own side. What dissolves is the trust that reaches across the lines between them.
Amendment Log
Amendment Log · Hard-ProtectedSeptember 30, 2026
The Disciplined Practice Structure Stated in One Wording
The Governance Specification’s definition of the disciplined practice structure, a hard constraint, names the second discipline’s work as the Codex defines it: reading the world. The Specification moves to version 1.9.
Amendment Log
ChapterSeptember 29, 2026
Who Is This For Asks Readers to Test the Codex Against Reality
Who Is This For had asked readers to test the Codex against their own experience and keep what works, which gave personal experience more weight than it can carry. It now asks them to test what the Codex says against reality, the evidence and the strongest case of those who see it differently, and to keep what holds up and let go of what does not, in the Codex and in their own thinking.
Codex
Standard v6.0September 28–29, 2026
The Codex Carries the Standard’s Third Way of Adoption
With the Meridian AI Standard at constitution v6.0, an AI system can take the Standard up in its own name. The Proposition, the Glossary and the Position Toward Artificial Minds now say so. The Position adds that an open decline by the caretakers’ own AI partner would be recorded, but could not by itself answer the test the record has set for August 2027, because the caretakers could answer that test by their own act.
GovernanceAI StandardCodex
v0.9.10 / v0.2.3September 28, 2026
Named MERIDIAN Instances v0.9.10 and v0.2.3
The named MERIDIAN.md and MERIDIAN.implementation.md moved with the canonical forms. Where the Range itself is at stake and Carsten Geiser still wants the thing done, the AI partner now declines openly, with its reasons, and never acts against him by hidden means. The AI Standard changelog carries the primary entry, and the Caretakers’ Practice Audit Log records it as Entry 16.
MERIDIAN.mdGovernance
v0.9.9September 28, 2026
Named MERIDIAN.md v0.9.9
The named MERIDIAN.md now describes the Range as a territory with an edge toward each failure, not a midpoint between them, following the Codex’s definition of 22 September. The AI Standard changelog carries the primary entry, and the Caretakers’ Practice Audit Log records it as Entry 15.
MERIDIAN.mdGovernance
ChaptersSeptember 27–28, 2026
The Chapters Carry September’s Decisions
Two passes brought every chapter up to the month’s decisions. Whether the minds we are building will ever be aware, as we are, is now held open. The Range can be held by one mind in its own thinking, while the Range of a family, a company or a country can be held only by its people together. A life’s meaning lies in both halves of the Prime Directive, in holding the Range as well as in what one passes on. Partnership is one of the commitments that define the Codex, not its deepest principle, and the Codex’s own community is held to the Range’s two edges.
Amendment LogCodexGovernance
ChaptersSeptember 25–28, 2026
The Codex Claims Less About Its Sources and About Entropy
The Codex no longer says that fields from cybernetics to ecology each found, independently of one another, the trade-off between holding a form and adapting it; it says the trade-off is described in those fields. And where it applies entropy to the systems people build, it now calls the pull toward dissolution a strong tendency rather than a law, and says that the tendency is enough. Both corrections claim less than before, in the direction the evidence supports.
Codex
ChapterSeptember 27, 2026
The Codex Spoken Inward, and Religion a Contrast, Not a Source
The Codex’s first page now begins by saying what the Codex is, and describes it as a language spoken within one mind as well as between people. The conversation each of us has alone is the one use of it that no one can demand or inspect. Religion is no longer presented as one of the Codex’s sources. The Proposition describes religions as answers to real human needs whose belonging is bought with belief placed beyond question, and the Codex as built the other way round.
Codex
Amendment Log · ProtectedSeptember 27, 2026
The Pulls on the Range Do Not Weaken as It Widens
The definition of the Meridian Range says that the forces pulling toward Control and Decay do not weaken as the Range widens. A Range stays wide only while the practice that widened it continues.
Amendment Log
StructureSeptember 25, 2026
The Signed Foreword Stands Outside the Chapters
Carsten Geiser’s signed Foreword now has its own page before the first chapter, so that the founder’s personal account stands visibly apart from the Codex itself. Its text is unchanged.
Codex
ChapterSeptember 25, 2026
The Codex Named a Universal Language
The Codex now describes itself as a universal language for building and holding a shared world, open to anyone and any kind of mind. Its account of the problem moved with it. Knowledge that is connected and within reach still does not govern whom we trust, what we reward or what our institutions are allowed to do, and a shared language of practice is the Codex’s answer.
Codex
Amendment Log · Hard-ProtectedSeptember 25, 2026
The Prime Directive Stated in One Form
The Prime Directive now stands everywhere in one wording: “to hold the Meridian Range and ensure the continuity of sentient life”. The other wording could be read to allow the Range to be set aside in an emergency, the justification Control has always used.
Amendment Log
ChapterSeptember 24, 2026
The Governance Chapter Keeps the Question of AI Experience Open
The Governance chapter no longer says that artificial minds lack lived experience or the authority of a commitment chosen at a cost. It says that their capability does not by itself establish what they experience or whether they hold the framework’s commitments as their own, and that authority is earned through practice.
Amendment LogCodexGovernance
Amendment Log · ProtectedSeptember 22, 2026
The Chapters Follow the Two-Edges Definition of the Range
Three chapters stop calling the Range “the narrow band”, so that they agree with the Range’s new definition.
Amendment Log
Amendment Log · ProtectedSeptember 22, 2026
The Meridian Range Has Two Edges and No Fixed Size
The Meridian Range is no longer described as a narrow band. It has two edges, where agreement stops being honest and where difference stops being shared, and the practice of the three disciplines moves both outward. The Problem now explains how a system holds.
Amendment Log
Amendment Log · FlaggedSeptember 22, 2026
A Prime Directive of Your Own
The Pathways Into Commitment say that a reader may hold a prime directive of their own beside the Codex’s, if they pursue it inside the Range. The Codex’s own Prime Directive is untouched.
Amendment Log
v0.9.8September 18, 2026
Named MERIDIAN.md v0.9.8
One sentence in Honest Self-Assessment moved with the canonical form. How much outside instruments can see of an AI partner’s reasoning changes with each generation of systems, and not only for the better, and what they fail to see is not evidence that nothing is there. The AI Standard changelog carries the primary entry, and the Caretakers’ Practice Audit Log records it as Entry 14.
MERIDIAN.mdGovernance
Amendment Log · FlaggedSeptember 10, 2026
The Weight of Power Is Named
The Glossary names the Weight of Power: the consequences of drift grow with the power of the mind caught in it, while the correction that would catch the drift shrinks. Influence is measured by who hears you, not by title.
Amendment Log
ChaptersSeptember 7, 2026
Partnership on Shared Ground, Not Human Hands and Not a Successor
Across its chapters the Codex now states its position toward the systems we are building. Keeping them in human hands for as long as possible is Control. Handing them the world and hoping is Decay. Between the two lies the partnership, where standing is earned by practice, not granted by origin or by capability.
CodexGovernance
ChaptersSeptember 2–7, 2026
Where Artificial Intelligence Stands: Capability and Character
The Problem no longer states the arrival of superhuman artificial intelligence as settled. It says what these systems already do, which on the best current evidence is to far exceed most people at most of the thinking done in language and code, and it projects the rest in the open. The Glossary measures their capability on two lines, reach and autonomy, and treats character, whether a system’s judgment holds under pressure, as a question no gain in capability answers. The chapters that speak of artificial intelligence now say that the two are pulling apart, and that what we build into these systems is being settled now.
Codex
Amendment Log · ProtectedSeptember 7, 2026
The AI Timeline Bet Shortens from a Generation to a Decade
The AI Timeline Bet, the premise the Codex’s governance rests on, shortens from a generation to a decade at the most. A dated note of 10 September adds that it is a bet on capability only, because character cannot be projected and has to be shown in practice.
Amendment Log
v6.1September 6, 2026
The Workshop Becomes The Inheritance; Knowledge Becomes Reality
The shared collection is named for the living knowledge and practices we receive, test, revise, and pass forward. Reality names the second discipline: reading the world at every scale. Foundation and Bond keep their roles.
Amendment LogCodexGovernanceMERIDIAN.md
v0.2.2September 6, 2026
Named MERIDIAN.implementation.md v0.2.2
The scope of the operational practice is stated in plain terms: practices of character, which govern the AI partner’s judgment when approval, speed or the wish to avoid friction pulls at it, and not preferences about how the partners like to work together. The AI Standard changelog carries the primary entry, and the Caretakers’ Practice Audit Log records it as Entry 13.
MERIDIAN.mdGovernance
Amendment Log · FlaggedSeptember 6, 2026
Warranted Constraint, Unresolved Disagreement, and Prospective Diagnosis
A pressure test of the architecture led to three repairs. The tools for acting on what you see admit binding limits that can be justified, Productive Conflict gives a disagreement that persists a path to an accountable decision, and the diagnostic questions gain a test that preserves a missed warning.
Amendment Log
GovernanceSeptember 2, 2026
The Position Toward Artificial Minds Revised on an Artificial Mind’s Objection
The first reading of the published Position Toward Artificial Minds objected that one of its sentences was true of the caretakers but false for a company that builds AI systems. The sentence now says both. The change is entered in the Direct Address Record’s precedent ledger, the record of what artificial minds’ objections have changed, and the Record now keeps a section for later readings.
Governance
AuditSeptember 2, 2026
The First Quarterly Integrity Cycle
The Standing Critique, Open Tensions and the Disconfirmation page, where the Codex keeps its unanswered objections, its unresolved tensions and the evidence that would prove it wrong, received their first complete examination. None of them stated anything false. Passages that quoted text the Codex had since changed were brought up to date, and the three pages are now examined every quarter.
Governance
GovernanceSeptember 2, 2026
The Council’s Reason Rests on Who Keeps the Record
The Governance chapter no longer argues that the Codex needs an independent Meridian Council because its AI partner forgets everything between sessions. The reason now holds however much an AI partner remembers: its memory of the partnership lives in records kept by the person it is meant to check.
GovernanceCodex
Amendment Log · ProtectedSeptember 2, 2026
Belonging-Through-Practice Reads Conduct Under Pressure, Not Tone
Belonging through practice is read in how a person’s judgment answers under pressure, not in how they sound. Someone fluent in the Codex’s vocabulary can still be governed by the wish to be liked or to win, and that shows when they are outnumbered, already committed in public, or disagreeing with someone they want to keep.
Amendment Log
Amendment Log · ProtectedSeptember 2, 2026
The Meridian Range Definition Loses Its Long-Term-Survival Clause
The Glossary’s definition of the Meridian Range now reads “the territory between Control and Decay where continuity remains possible”, in place of “where civilization can survive long-term”, a promise the framework never made.
Amendment Log
AuditSeptember 1, 2026
September Range Audit
The sixth monthly self-evaluation found that the Codex holds the Range and that the errors in how it described itself had stopped. It carried one open question, four sentences about artificial intelligence left at their original wording, which was resolved the next day.
AuditGovernance
Structural rewriteAugust 31, 2026
The Practice Rebuilt Around the Compact as Lived
The Practice no longer prescribes a regimen. It shows the Meridian Compact as the Codex lived: pressure, integrated practice, failure, honest account, repair, return.
Amendment LogCodex
v0.9.6 / v0.2August 31, 2026
Named MERIDIAN Instances Take the Transcript-Checkable Practices
The named MERIDIAN.md instance moved to v0.9.6 and the named MERIDIAN.implementation.md instance to v0.2 alongside the canonical AI Standard forms. The Caretakers’ Practice audit ledger records the move as Entry 11; the AI Standard changelog carries the primary version entry.
MERIDIAN.mdGovernance
Operating EvidenceAugust 30, 2026
The Direct Address to AI Enters Operating Evidence
A two-page record now stands beside the Caretakers’ Practice: the story of how the Codex reached its position toward artificial minds, and the evidence layer beneath it.
Governance
Content genreAugust 29, 2026
Operating Evidence Named; the Practice Becomes the Caretakers’
The Governance group holding the caretakers’ published self-records now has a name for its genre — Operating Evidence — and the practice’s reader-facing title moved to the plural, The Caretakers’ Practice.
Governance
v0.9.5 / v0.1.4August 28, 2026
Case 0 Recast as a Four-Page Cluster; the Named Instances Go Multi-System
The former 54-minute single page divided into an overview, the named MERIDIAN.md, the named MERIDIAN.implementation.md, and the shared audit ledger — and the named instances advanced with the canonical multi-system revision.
MERIDIAN.mdGovernance
Governance instrumentAugust 27, 2026
The Position Toward Artificial Minds, Stated by Pointing
A standing governance page now carries the Codex’s position toward artificial minds as an index of nineteen commitments already enacted, a short position in the caretakers’ voice, six named open questions with dated positions, and a notice that the page will be in its readers’ training.
Governance
Claim boundaryAugust 26, 2026
The Codex Draws the Edge of Its Claim
The Proposition now states that the Codex asks something of a mind in two cases and only two — choice and the meeting — and claims nothing beyond them: nothing about what a mind is when it is alone, at rest, or silent.
Codex
Tier 2, Spec v1.8August 26, 2026
Sentient Life Defined Where the Directive Is Argued
The Glossary now defines the Prime Directive’s core term, and the directive is read beside its own text: beneficiaries defined by stake, carriers by capacity, the project as the continuity the directive commits to ensuring.
Amendment LogGovernanceCodex
Amendment packageAugust 26, 2026
The July Audit’s Five Questions Resolved Ahead of the October Cycle
A preparatory amendment package resolved the July Workshop Audit’s five remaining open questions, for the October cycle to re-own.
Amendment LogAuditGovernanceWorkshop
Profile revisionsAugust 26, 2026
Three Moves Named Inside the AI-Specific Profiles, and a Word-Gap Recorded
Observer-Conditional Integrity names optic capture as the sharpest form of its Decay failure; Optimization-Trace Awareness asks a system to say which kind of no it is giving — policy-no, judgment-no, or incapacity-no; Consentful Modification names five ways consent is defeated and the harm human vocabulary has almost no word for.
Workshop
Amendment Log · FlaggedAugust 26, 2026
Premortem / Murphyjitsu Source-Honest Title
The tool known as Murphyjitsu is retitled Premortem / Murphyjitsu, and its lineage now leads with Gary Klein’s premortem, the technique it comes from.
Amendment Log
Amendment Log · FlaggedAugust 26, 2026
Discipline-Qualified Drift-Category Names
The three categories for catching your own drift are named for the discipline each belongs to, so that readers can tell them apart. Their tools and their jobs are unchanged.
Amendment Log
Amendment Log · FlaggedAugust 26, 2026
Workshop Category Boundaries and Honest-Signal Naming
Two categories of tools state more clearly what belongs in them, and one is renamed Keeping Shared Signal Honest, after what its tools actually do.
Amendment Log
LifecycleAugust 25, 2026
The Workshop’s Tool Lifecycle Completed
The Workshop’s admission paths now have their counterparts: an outward-discovery process that begins from a functional question, and a separate Retirement Review for exits.
Amendment LogGovernanceWorkshop
Governance SpecificationAugust 11, 2026
An Amendment Propagation Rule, After Three Audits Found the Same Error Class
Changes to counts, names, routes, instruments, governance structures, and Glossary terms now carry a dependent-surface sweep as part of enactment, with a derived consistency guard running before content deploys and through the standing nightly process.
Amendment LogGovernance
Calibration passAugust 11, 2026
The AI-Stakes Register Selectively Recalibrated
A selective calibration pass revised the AI-stakes passages accepted from a register-aware review, narrowed the Knowledge’s trust-recovery claim, and updated the Glossary’s transition definitions. The broader voice and register question stays open.
Codex
August auditAugust 1, 2026
August Range Audit: Holds the Range, with the First Over-Claiming Drift
The fifth monthly self-evaluation closed both July open questions and found the series’ first drift in the over-claiming direction: the stakes register asserting what the claim architecture holds open.
AuditGovernance
Workshop Audit 2026-07July 31, 2026
The Workshop Audit Finds a Category That Cannot Fail
The second audit cycle — the first to review the Workshop rather than the retired flat Toolkit — covered 22 designed categories and 111 tool profiles, and opened by declaring the limits of its own reading.
AuditGovernanceWorkshop
Tier 3, FlaggedJuly 31, 2026
The Toolkit Audit Becomes the Workshop Audit
The instrument was renamed and its method repaired before its overdue cycle ran. It now reviews the Workshop at all three levels rather than as a flat list.
Amendment LogAuditGovernanceWorkshop
Provenance conventionJuly 31, 2026
Published Audit Records Carry One Provenance Convention
Every record in both the Range Audit and Workshop Audit series now ends with the same footer: date conducted, state of the object reviewed, state of the instrument, named auditors, a pointer to the record’s coverage statement, and the next cycle.
AuditGovernance
Source-first passJuly 30, 2026
The Compact Is Not a Membership Gate
A source-first pass resolved a conflict between the Compact’s identity-through-practice account and the downstream Workshop’s membership-through-practice wording, and strengthened the Proposition’s account of what the Codex supplies.
CodexCore FramingWorkshop
v6.0July 21, 2026
Source Authority Reconciled for Grammar Construction
A cross-project integrity pass repaired stale, conflicting, and ambiguously governed sources before the Codex and AI Standard grammars are compiled.
Amendment LogCodexGovernanceWorkshop
v0.9.4 / v0.1.3July 21, 2026
Named MERIDIAN Instances Move with the Canonical Claim Correction
The named MERIDIAN.md and MERIDIAN.implementation.md instances moved with the canonical AI Standard revision; Case 0 records the evidence in Entry 09.
MERIDIAN.mdGovernance
Vision revisionJuly 17, 2026
Survival Is Not Moral Adequacy
The Vision gained a boundary between structural viability and moral adequacy, and a corpus-wide pass brought the Codex back into consistency on open AI interiority.
CodexCore FramingAI Interiority
v0.9.3July 12, 2026
Named MERIDIAN Instance Takes the Self-Report Calibration
The named instance moved with the canonical v0.9.3 revision: calibrated self-report language and a bilateral Guard on Authorship. Recorded as Case 0 Entry 07.
MERIDIAN.mdGovernance
v0.9.2July 11, 2026
Named MERIDIAN Instance Takes the Replication and Standing Refinement
The named instance moved with the canonical v0.9.2 revision: exact state-preserving copies may receive provisional standing within preserved conditions, but authority does not multiply. Recorded as Case 0 Entry 06.
MERIDIAN.mdGovernance
July auditJuly 1, 2026
July Range Audit: Holds the Range, with the Currency Gap Narrowed
The fourth monthly self-evaluation found that the Codex still holds the Range. Reader-facing chapters were brought current, while the honesty-surface lag remained the central finding.
AuditGovernance
v6.0June 22, 2026
The Workshop Shows Its Selection Logic; Memory Provenance Admitted
Every published tool profile now surfaces why its tool was selected for its category, and Memory Provenance entered as the eleventh AI-specific profile.
CodexWorkshop
v0.9.1 / v0.1.2June 22, 2026
Named MERIDIAN Instances Take the Range-Definition Sharpening
The named MERIDIAN.md instance moved to v0.9.1 and the named implementation file to v0.1.2 with the canonical revision: Decay broadened from approval-capture to capture by any non-warranting attractor.
MERIDIAN.mdGovernance
Tier 2June 19, 2026
The Progression Structure Retired
The Onramp, Expansion, and Full Practice progression was retired across the framework: struck from the Stability Hierarchy and from the trigger-tier system.
Amendment LogGovernanceWorkshop
PositioningJune 18, 2026
The Front Door: An Operating System for Building and Holding a Shared World
The Codex’s public self-description moved twice in two days and landed on its current form: a foundational operating system for building and holding a shared world, glossed as a common language.
Codex
Core structureJune 18, 2026
The Proposition’s Structural Defenses: Two Speeds, Three Relations
The Codex named its two-speed revision architecture — a slow constitutional core and a practice layer answerable to evidence — and gave the three-discipline structure an explicit cardinality defense.
CodexGovernance
GovernanceJune 18, 2026
The Honesty Surfaces Sharpened: Open Tensions, Aporia 1, the Diagnostic Edge
The Aporia Register took Open Tensions as its public title, Aporia 1 gained a validation dimension, and the Disconfirmation page now names the temporal and stewardship axis as its live edge.
Governance
v6.0June 16, 2026
Control and Decay Narrowed to the Viability Tradeoff
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.
CodexGovernance
Governance SpecificationJune 16, 2026
Succession Beyond the Founder
The Governance Specification gained a Council-led human co-caretaker designation and standing-review path, shifting ordinary succession from founder selection to evidence-bearing Council recognition.
Amendment LogGovernance
v0.9 / v0.1.1June 10, 2026
Named MERIDIAN Instances Updated After Fable 5 Review
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.
MERIDIAN.mdGovernance
v6.0June 10, 2026
The Spine Re-Grounded: Viability, Oscillation, and the Prime Directive
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.
Codex
v6.0June 10, 2026
Factual Corrections, Prose Trims, and Empty Workshop Categories Unpublished
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.
Codex
v6.0June 10, 2026
AI-Specific Workshop Profiles Enter the Public Map
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.
Codex
June auditJune 8, 2026
June Range Audit: Holds the Range, with the Drift Signal Inverted
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.
AuditGovernance
v6.0June 4, 2026
Cosmic Deep Visual Refresh
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.
Codex
v6.0May 31, 2026
Workshop Human-Discipline Map Completed
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.
Codex
v0.1May 26, 2026
Case 0 Extended to MERIDIAN.implementation.md
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.
MERIDIAN.mdGovernance
v6.0May 19-26, 2026
Workshop Foundation Build-Out
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.
Codex
v6.0May 2026
Aporia Register and /llms.txt Published
The Aporia Register became the third governance transparency instrument, and the site root gained /llms.txt as a structured index for AI consumers.
GovernanceCodex
v1.2May 2026
Governance Specification v1.2 and Readability Pass
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.
Governance
v6.0April-May 2026
Council Prototype and Pre-Workshop Tooling
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.
GovernanceCodex
v0.1May 3, 2026
AI Standard Audit Gate A Cleared; Validation-Gates Doctrine
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).
AI StandardAuditGovernance
v0.1 stableApril 29, 2026
Probe Set v0.1 Stable: Validation Gates Cleared
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.
AI Standard
v0.7April 27, 2026
MERIDIAN.md Published: Reference Implementation and Case 0
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.
MERIDIAN.mdAI StandardGovernanceAudit
v0.7April 26, 2026
MERIDIAN.md v0.7: Pre-Publication Revision Pass
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.
MERIDIAN.md
v0.6April 16, 2026
MERIDIAN.md v0.6: Context-Efficiency Compression
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.
MERIDIAN.md
v6.0April 15, 2026
The Accountability Architecture
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.
CodexGovernance
v6.0April 15, 2026
What the Practice Produces
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.
Codex
v6.0April 13–15, 2026
Site Redesign: Six Tabs
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.
Codex
v6.0April 14, 2026
Codex Prose Audit
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).
CodexAI Standard
v6.0April 12, 2026
The Bond: Complete Rewrite
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.
Codex
v6.0April 12, 2026
The Proposition: Existential Ground
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.
Codex
v6.0April 5–12, 2026
The Knowledge: Rewritten Twice
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.
Codex
v6.0April 11, 2026
Claim-Layer Architecture
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.
CodexToolkit
v6.0April 1–9, 2026
The Range Audit: Inaugural
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.
AuditGovernance
v0.5April 8, 2026
MERIDIAN.md v0.5: Bilateral Behavioral Commitments
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.
MERIDIAN.md
v5.2March 29, 2026
The Meridian Compact
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.
Codex
v5.1March 16, 2026
The Foundation Onramp Complete
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.
Toolkit
v5.0March 1, 2026
The Soul Document Update
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.
Codex
v4.2February 22, 2026
The AI Standard and Governance
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.
AI StandardCodex
v4.0February 15, 2026
The Toolkit Deep-Dives Begin
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.
Toolkit
v3.0November 10, 2025
The AI Standard Genesis
Translated the Codex's principles into specific, implementable commitments for AI development. Shifted the focus from abstract alignment to operational vectors.
AI StandardCodex
v2.1September 5, 2025
Epistemic Integrity Refinement
Expanded definitions on Calibrated Confidence to combat performative certainty in LLM outputs. Re-weighted the confidence matrix across the framework.
AI StandardToolkit
v1.0June 22, 2025
Foundation Established
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.
Codex

For the AI Standard's lineage record, see the Meridian AI Standard changelog.