constbogdan · constbogdan · Sep 21, 2026 · Sep 21, 2026
diff --git a/.gitignore b/.gitignore
@@ -71,6 +71,10 @@ docs/*
 !docs/T0_3_DOCUMENTATION_CONSOLIDATION_PLAN.md
 !docs/README.md
 !docs/VALIDATION.md
+!docs/history/
+!docs/history/README.md
+!docs/history/
+!docs/history/README.md
 !docs/AGENTS.md
 !docs/CODEX_HANDOFF.md
 !docs/OBSERVED_MINOR_ISSUES.md

diff --git a/docs/CODEX_HANDOFF.md b/docs/CODEX_HANDOFF.md
@@ -1612,7 +1612,7 @@ change. Live stable promotion and selector/device acceptance remain pending.
 
 User-supplied acceptance establishes operational downstream delivery and Mosaic-driven
 1.0.3 -> 1.0.5 updating. Full evidence, hash, recovery boundaries and timing observations
-are in [the delivery acceptance record](MOSAIC_DEVELOPMENT_RELEASE.md#historical-development-delivery-and-in-place-updater-acceptance---complete-live-validated).
+are in [the delivery acceptance record](MOSAIC_DEVELOPMENT_RELEASE.md#historical-development-delivery-and-in-place-updater-acceptance---complete--live-validated).
 
 The initial normal run built source `41f9f83c36b8866211c9680d3b416d5ebede4888`, version
 1.0.5/code 5, unsigned artifact `10099950969`; signing-secret availability failed and

diff --git a/docs/I06_NATIVE_UPSTREAM_MIGRATION_PLAN.md b/docs/I06_NATIVE_UPSTREAM_MIGRATION_PLAN.md
@@ -1,5 +1,9 @@
 # I06 native upstream-integration migration plan
 
+> **Historical migration decision and acceptance record.** Current upstream operation is owned by
+> [UPSTREAM_SYNC.md](UPSTREAM_SYNC.md). This file preserves the migration rationale and proof; it is
+> not a current runbook. See the [history index](history/README.md).
+
 ## Purpose and status
 
 This tracks the remaining migration from synthetic I06 integration state to truthful native Git

diff --git a/docs/I07_PUBLISHED_RELEASE_REMEDIATION.md b/docs/I07_PUBLISHED_RELEASE_REMEDIATION.md
@@ -1,5 +1,9 @@
 # I07 — Published Release Remediation
 
+> **Historical decision rationale and acceptance record.** Current Hold and forward-fix operation
+> is owned by [MOSAIC_STABLE.md](MOSAIC_STABLE.md). This record explains why that policy exists; it
+> is not a second operating runbook. See the [history index](history/README.md).
+
 ## Status
 
 **COMPLETE / LIVE VALIDATED.**

diff --git a/docs/ITEM_6_CONSOLIDATION_CHECKLIST.md b/docs/ITEM_6_CONSOLIDATION_CHECKLIST.md
@@ -1,5 +1,9 @@
 # Item 6 — Mosaic delivery and tooling consolidation
 
+> **Historical program ledger.** This is point-in-time decision and acceptance evidence, not a
+> current operating runbook. Use the [documentation index](README.md) for current authorities and
+> the [history index](history/README.md) for historical context.
+
 This document is the durable, multi-PR checklist for the 143 numbered requirements in the Item 6 specification. The source specification remains external planning input; this checklist records repository evidence, dependencies, readiness, and completion.
 
 Status terms used below:

diff --git a/docs/ITEM_6_I05_PRESENTATION.md b/docs/ITEM_6_I05_PRESENTATION.md
@@ -5,6 +5,8 @@
 > are migration evidence, not current operator capabilities.
 > T0-1 CP2 also removed the inherited `Development build` and `Create release` workflows. Their
 > inventory rows remain historical evidence; both paths are now downstream-owned absences.
+> Current authorities are linked from the [documentation index](README.md); related evidence is
+> grouped in the [history index](history/README.md).
 
 Baseline: `27f264ee` before I05 edits. Inventory captured before implementation.
 

diff --git a/docs/ITEM_6_UPSTREAM_AUTOMATION_AUDIT.md b/docs/ITEM_6_UPSTREAM_AUTOMATION_AUDIT.md
@@ -5,6 +5,8 @@
 > T0-1 CP2 subsequently removed the guarded inherited `main.yml` and `release.yml` workflows as
 > explicit downstream-owned absences. Baseline T0 does not support their historical store/AAB
 > distribution capability. The pinned inventory below remains evidence, not current workflow state.
+> Current upstream operation is owned by [UPSTREAM_SYNC.md](UPSTREAM_SYNC.md); related evidence is
+> grouped in the [history index](history/README.md).
 
 Analysis checkpoint, 2026-09-10. Governing tracker: [Item 6 consolidation checklist](ITEM_6_CONSOLIDATION_CHECKLIST.md).
 This inventory began read-only. I05 presentation and I06 ownership-aware Sync were subsequently

diff --git a/docs/README.md b/docs/README.md
@@ -86,27 +86,12 @@ Current lifecycle boundaries are: [PR preparation](PREPARE_PR.md) →
 
 ## Historical decisions and acceptance
 
-The following files are point-in-time engineering evidence, not current operating runbooks. D4 may
-add historical navigation or move records only after preserving their links and meaning.
-
-- **Historical acceptance/evidence** — [T0-1 operator UX inventory](T0_1_OPERATOR_UX_INVENTORY.md):
-  completed CP1–CP8 implementation and hosted acceptance ledger.
-- **Historical decision and evidence** — [T0-1 performance audit](T0_1_CP7_PERFORMANCE_AUDIT.md):
-  measured performance corpus and accepted optimization decisions.
-- **Historical acceptance/evidence** — [Item 6 consolidation checklist](ITEM_6_CONSOLIDATION_CHECKLIST.md):
-  delivery/tooling consolidation program ledger.
-- **Historical design and acceptance** — [I05 presentation ledger](ITEM_6_I05_PRESENTATION.md):
-  delivery presentation and compatibility decisions.
-- **Historical design/audit** — [Upstream automation audit](ITEM_6_UPSTREAM_AUTOMATION_AUDIT.md):
-  pinned workflow inventory and ownership analysis.
-- **Historical decision** — [Release pipeline simplification plan](RELEASE_PIPELINE_SIMPLIFICATION_PLAN.md):
-  rationale for the surviving validation and release topology.
-- **Historical decision and acceptance** — [I06 native upstream migration](I06_NATIVE_UPSTREAM_MIGRATION_PLAN.md):
-  migration from the superseded synchronization lifecycle.
-- **Historical decision** — [I07 published Release remediation](I07_PUBLISHED_RELEASE_REMEDIATION.md):
-  accepted containment and forward-recovery policy.
-- **Current architecture with historical acceptance** — [R2 Mosaic identity record](T0_3_R2_MOSAIC_IDENTITY.md):
-  canonical identity plus R2–R4 evidence retained in its current location until later consolidation.
+- **Historical evidence index** — [Historical engineering records](history/README.md): grouped Item 6,
+  T0-1, performance, upstream-migration, release-remediation, and Mosaic-identity evidence. These
+  records explain decisions and acceptance; they are not current operating runbooks.
+- **Historical decision still referenced by current operation** —
+  [Published Release remediation](I07_PUBLISHED_RELEASE_REMEDIATION.md): rationale for the current
+  Stable Hold plus forward-fix policy owned by `MOSAIC_STABLE.md`.
 
 ## Component references
 

diff --git a/docs/RELEASE_PIPELINE_SIMPLIFICATION_PLAN.md b/docs/RELEASE_PIPELINE_SIMPLIFICATION_PLAN.md
@@ -1,5 +1,10 @@
 # Release Pipeline Simplification Plan
 
+> **Historical architecture decision record.** Current operation is owned by
+> [VALIDATION.md](VALIDATION.md), [MOSAIC_DEVELOPMENT_RELEASE.md](MOSAIC_DEVELOPMENT_RELEASE.md),
+> [MOSAIC_SIGNING.md](MOSAIC_SIGNING.md), and [MOSAIC_STABLE.md](MOSAIC_STABLE.md). This file
+> preserves the decisions that produced those boundaries. See the [history index](history/README.md).
+
 This document is the authoritative migration tracker for simplifying Mosaic's release pipeline. It records durable decisions and acceptance evidence without treating earlier architecture-review output as a fixed implementation checklist.
 
 ## Standing invariants

diff --git a/docs/T0_1_CP7_PERFORMANCE_AUDIT.md b/docs/T0_1_CP7_PERFORMANCE_AUDIT.md
@@ -1,5 +1,9 @@
 # T0-1 CP7 performance, latency, and efficiency audit
 
+> **Historical performance evidence.** Measurements and acceptance decisions are point-in-time,
+> not current timing guarantees or operating instructions. Current validation authority is
+> [VALIDATION.md](VALIDATION.md); related history is indexed in [history](history/README.md).
+
 Status: **CP7 COMPLETE / HOSTED VALIDATED**
 Measured: **2026-09-15 through 2026-09-16**
 Closure: **CP8 COMPLETE; T0-1 COMPLETE**. Next roadmap phase: **T0-2**.

diff --git a/docs/T0_1_OPERATOR_UX_INVENTORY.md b/docs/T0_1_OPERATOR_UX_INVENTORY.md
@@ -1,5 +1,10 @@
 # Baseline T0-1 operator UX, workflow, and presentation inventory
 
+> **Historical program ledger.** This completed T0-1 record preserves decisions and hosted
+> acceptance evidence. Current PR and validation operation is owned by
+> [PREPARE_PR.md](PREPARE_PR.md) and [VALIDATION.md](VALIDATION.md); use the
+> [history index](history/README.md) for context.
+
 Status: **T0-1 COMPLETE. CP4B.3 COMPLETE / HOSTED VALIDATED; P04 COMPLETE / HOSTED VALIDATED;
 Validation-plan visibility COMPLETE / HOSTED VALIDATED; prepare-pr terminal UX COMPLETE / HOSTED
 VALIDATED; Operator UX batch COMPLETE / HOSTED VALIDATED**

diff --git a/docs/T0_3_DOCUMENTATION_CONSOLIDATION_PLAN.md b/docs/T0_3_DOCUMENTATION_CONSOLIDATION_PLAN.md
@@ -1,6 +1,6 @@
 # T0-3 documentation consolidation audit and plan
 
-Status: **D1 and D2 COMPLETE; D3 implemented pending review. D4 has not begun.**
+Status: **D1-D3 COMPLETE; D4 implemented pending review. D5 has not begun.**
 
 This audit describes the documentation set at `main` commit
 `44564901cbdb7ffce4b1c0704aa2d53f93c40fa9`. It does not move, delete, rename, or broadly rewrite
@@ -316,6 +316,38 @@ manuals current-first through concise ownership, boundary, and recovery summarie
 cross-links. Existing acceptance and incident material remains in place and is explicitly secondary
 where it was prominent. No operating behavior changed.
 
-D4 remains next and has not begun: no historical files or large evidence blocks have moved, no
-history index exists, and existing anchors remain preserved. Later D5 work still owns roadmap,
-handoff, architecture, identity-document, and agent-guide reduction or renaming.
+D3 changed no operating behavior and retained existing anchors.
+
+## D4 implementation decisions
+
+D4 created `docs/history/README.md` as the single historical-evidence boundary and replaced the
+temporary flat history list in `docs/README.md` with that grouped index. Historical records now
+state near their top that they are point-in-time evidence, name the current canonical owner, and
+link to the history index where useful.
+
+No existing record moved. Repository inventory found many normal Markdown consumers, including
+heading-level links from the roadmap, handoff, validation and delivery manuals, plus likely external
+GitHub links to these established paths and anchors. No workflow, script, test, or configuration
+consumer required their paths, but relocating the files would create unnecessary anchor and inbound
+link risk for no authority benefit. The flat files therefore remain deliberately stable and are
+classified through navigation rather than duplicated behind pointer stubs.
+
+The in-place decision applies to `ITEM_6_CONSOLIDATION_CHECKLIST.md`,
+`ITEM_6_I05_PRESENTATION.md`, `ITEM_6_UPSTREAM_AUTOMATION_AUDIT.md`,
+`T0_1_OPERATOR_UX_INVENTORY.md`, `T0_1_CP7_PERFORMANCE_AUDIT.md`,
+`I06_NATIVE_UPSTREAM_MIGRATION_PLAN.md`, `I07_PUBLISHED_RELEASE_REMEDIATION.md`, and
+`RELEASE_PIPELINE_SIMPLIFICATION_PLAN.md`. Each is now indexed and has an explicit historical
+boundary near its top; the two Item 6 records that already had accurate historical banners received
+only navigation links.
+
+No long acceptance block was extracted from a current manual. D3 already placed concise current
+contracts first and labelled embedded acceptance sections historical. Those headings have inbound
+links from the roadmap/handoff and may have external references, so D4 preserved them in place and
+used the history index to make their role unambiguous. `T0_3_R2_MOSAIC_IDENTITY.md` likewise remains
+the current identity owner until D5; its acceptance sections are explicitly historical without
+renaming or splitting the file.
+
+D4 is complete pending review: evidence and historical names remain unchanged, established paths
+and anchors are preserved, and current ownership remains with the D3 manuals. D5 has not begun;
+roadmap/handoff reduction, `ARCHITECTURE.md`, roadmap or identity renaming, and agent-guide
+consolidation remain later work.
diff --git a/docs/T0_3_R2_MOSAIC_IDENTITY.md b/docs/T0_3_R2_MOSAIC_IDENTITY.md
@@ -3,6 +3,11 @@
 Status: **R2 canonical Mosaic identity — HOSTED VALIDATED. R3 — COMPLETE / HOSTED AND REAL-DEVICE
 VALIDATED. R4 — COMPLETE / HOSTED VALIDATED. T0-3.0 Mosaic identity establishment — COMPLETE.**
 
+The **Current identity contract** below remains authoritative until D5 decides its permanent form.
+Later R2/R3/R4 implementation, incident, and acceptance sections are historical evidence and do
+not define alternate current identities. They remain in place to preserve established paths and
+anchors; see the [history index](history/README.md).
+
 ## Current identity contract
 
 New downstream state uses one canonical product identity:

diff --git a/docs/history/README.md b/docs/history/README.md
@@ -0,0 +1,67 @@
+# Historical engineering records
+
+This index groups Mosaic's point-in-time engineering evidence. These records preserve the names,
+repository identities, SHAs, run and PR numbers, workflow and artifact identities, failures,
+measurements, rejected approaches, and decisions that were true when recorded. They are not current
+operating runbooks.
+
+For current behavior, start with the [documentation index](../README.md). It links the canonical
+owners for PR preparation, validation, Development publication, signing, Stable/Hold, upstream
+integration, identity, roadmap, and continuity. When a historical statement differs from a current
+manual, the current canonical owner governs operation and the historical statement remains evidence
+of the earlier state.
+
+The records remain in their established locations. D4 found extensive heading-level links from the
+roadmap, handoff, and current manuals, plus likely external references to these long-lived paths and
+anchors. No machine consumer requires the paths, but moving them would add needless link and anchor
+risk without changing their authority. This index provides the historical boundary without a deep
+archive tree or duplicate copies.
+
+## Item 6 and earlier consolidation
+
+- [Item 6 delivery and tooling consolidation](../ITEM_6_CONSOLIDATION_CHECKLIST.md) — completed
+  multi-checkpoint program ledger and acceptance evidence.
+- [I05 delivery presentation and compatibility](../ITEM_6_I05_PRESENTATION.md) — historical
+  presentation inventory, compatibility classification, and migration evidence.
+- [Upstream automation audit](../ITEM_6_UPSTREAM_AUTOMATION_AUDIT.md) — pinned workflow inventory
+  and ownership analysis preceding the current upstream model.
+- [Release pipeline simplification plan](../RELEASE_PIPELINE_SIMPLIFICATION_PLAN.md) — decisions and
+  evidence that produced the surviving validation, build, signing, and publication boundaries.
+
+## T0-1 validation and operator experience
+
+- [T0-1 operator UX inventory](../T0_1_OPERATOR_UX_INVENTORY.md) — completed CP1–CP8 implementation
+  and hosted-acceptance ledger.
+- [CP7 performance audit](../T0_1_CP7_PERFORMANCE_AUDIT.md) — dated performance measurements,
+  accepted optimization, and KEEP decisions.
+
+Current validation authority belongs to [Validation architecture](../VALIDATION.md), and current PR
+operation belongs to [Safe pull-request preparation](../PREPARE_PR.md).
+
+## Upstream migration
+
+- [I06 native upstream migration](../I06_NATIVE_UPSTREAM_MIGRATION_PLAN.md) — completed design,
+  migration, and native-ancestry acceptance evidence.
+
+Current ownership, Observe/Publish, waiting, resolver, credential, and failure behavior belongs to
+[Upstream synchronization](../UPSTREAM_SYNC.md).
+
+## Release remediation and delivery decisions
+
+- [I07 published Release remediation](../I07_PUBLISHED_RELEASE_REMEDIATION.md) — decision rationale
+  and acceptance evidence for Hold plus higher-version forward recovery.
+- [Release pipeline simplification plan](../RELEASE_PIPELINE_SIMPLIFICATION_PLAN.md) — retained
+  architectural rationale for the current pipeline topology.
+
+Current operation belongs to [Development publication](../MOSAIC_DEVELOPMENT_RELEASE.md),
+[Release signing](../MOSAIC_SIGNING.md), and [Stable/Hold](../MOSAIC_STABLE.md).
+
+## Mosaic identity migration and T0-3 evidence
+
+- [R2–R4 Mosaic identity record](../T0_3_R2_MOSAIC_IDENTITY.md) — the current identity contract plus
+  retained repository rename, canonicalization, presentation, and old-name retirement acceptance.
+- [Documentation consolidation plan](../T0_3_DOCUMENTATION_CONSOLIDATION_PLAN.md) — D1 inventory,
+  reviewed ownership model, and D1–D7 implementation decisions.
+
+The identity record remains in place because it still owns current identity until D5 decides its
+permanent form. Its historical sections are evidence, not alternate current identities.