@@ -90,8 +90,10 @@ This repo is designed as a learning system, not just a code dump.
 
 ## 🏗️ Architecture Overview
 
-- Engine Layer → [src/engine/](src/engine/)
-- Advanced Systems → [src/advanced/](src/advanced/)
+- Web layer target → `src/web/`
+- API runtime target → `src/api-runtime/`
+- Runtime layer target → `src/runtime/`
+- Existing `src/engine/`, `src/advanced/`, `src/shared/`, `src/tools/`, `src/api/`, and `src/dev-runtime/` folders are legacy transition buckets until dedicated migration PRs move them.
 - Tools, samples, and games consume public contracts only
 
 ---
@@ -122,8 +124,8 @@ PLAN_PR → BUILD_PR → APPLY_PR
 
 ## ⚠️ Runtime Boundary Rules
 
-- Engine code lives in [src/engine/](src/engine/)
-- Advanced systems live in [src/advanced/](src/advanced/)
+- New deployable source belongs under `src/web/`, `src/api-runtime/`, or `src/runtime/`.
+- Existing legacy `src/*` buckets remain transition-only until scoped migration PRs move them.
 - Tools, samples, and games must use public contracts only
 - Engine boundaries should not be bypassed
 
 
@@ -16,6 +16,9 @@ This folder is the destination shell for non-deployable development workspace ma
 - `dev/docs_build/` owns active development governance and PR workflow material.
 - `dev/reports/` owns generated reports.
 - `dev/workspace/artifacts/` owns generated non-report artifacts and local temporary workspace output.
+- `dev/tests/` owns non-deployable tests.
+- `dev/scripts/` owns development-only scripts and runners.
+- `dev/config/` owns development-only runner and tooling configuration.
 - `dev/archive/` owns historical development reference material.
 - `dev/project-instructions/` is deprecated reference only; active Project Instructions live under `dev/docs_build/dev/ProjectInstructions/`.
 
 
@@ -66,7 +66,7 @@ When active guidance overlaps, use these canonical owner documents:
 
 - Workflow and Product Owner testable completion: `dev/docs_build/dev/ProjectInstructions/addendums/pr_workflow.md`
 - START / WORK / END lifecycle, branch gates, mandatory hard stops, and EOD main lock: `dev/docs_build/dev/ProjectInstructions/addendums/project_instructions_single_source_eod_lock.md`
-- Repository directory ownership and restructure boundaries: `dev/docs_build/dev/ProjectInstructions/addendums/repository_directory_standard.md`
+- Repository directory ownership, final root standard, final `src/` layer standard, final `dev/` workspace standard, and restructure boundaries: `dev/docs_build/dev/ProjectInstructions/addendums/repository_directory_standard.md`
 - Page-level Playwright organization and completion coverage: `dev/docs_build/dev/ProjectInstructions/addendums/test_structure_standardization.md`
 - API/environment model and `Browser -> API -> Database` rule: `dev/docs_build/dev/ProjectInstructions/addendums/environment_governance_model.md`
 - Environment variable, URL, R2 prefix, and feature flag configuration: `dev/docs_build/dev/ProjectInstructions/addendums/environment_configuration_standards.md`
 
@@ -6,6 +6,29 @@ Establish the canonical repository structure for future development and reduce t
 
 ## Canonical Structure
 
+Root product sections:
+- docs/
+- games/
+- toolbox/
+- account/
+- admin/
+- legal/
+- assets/
+
+Deployable application source:
+- src/web/{feature-name}/
+- src/api-runtime/{feature-name}/
+- src/runtime/{feature-name}/
+
+Development workspace:
+- dev/docs_build/
+- dev/reports/
+- dev/tests/
+- dev/scripts/
+- dev/config/
+- dev/archive/
+- dev/workspace/artifacts/
+
 Tools:
 - toolbox/{tool-name}/index.html
 
@@ -20,14 +43,15 @@ Themes:
 Shared JavaScript:
 - assets/js/shared/
 
-Engine:
-- src/engine/{feature-name}/
-
-API:
-- api/{feature-name}/
+Legacy transition buckets:
+- src/advanced/
+- src/api/
+- src/dev-runtime/
+- src/engine/
+- src/shared/
+- src/tools/
 
-Serverside:
-- serverside/{feature-name}/
+These legacy transition buckets may remain until explicit migration PRs move them into `src/web/`, `src/api-runtime/`, or `src/runtime/`.
 
 ## Rules
 
@@ -37,3 +61,7 @@ Serverside:
 - No new scattered JS folders.
 - No new scattered CSS folders.
 - New development follows the canonical structure.
+- New deployable `src/` work follows `src/web/`, `src/api-runtime/`, or `src/runtime/`.
+- New non-deployable work belongs under `dev/`.
+- Required reports belong under flat `dev/reports/`.
+- Required ZIPs and generated temporary artifacts belong under `dev/workspace/artifacts/tmp/`.
@@ -5,25 +5,57 @@ Owner: OWNER
 
 ## Purpose
 
-Define the target repository directory ownership model before the development workspace restructure chain begins.
+Define the target repository directory ownership model for the post-restructure repository.
 
 This document is governance only. It does not move runtime, UI, API, tests, or production files by itself.
 
 ## Directory Ownership
 
-- Repository root contains production/public product sections and standard repository configuration.
+- Repository root contains production/public product sections and standard repository configuration only.
 - `src/` contains deployable application code.
 - `dev/` contains non-deployable build, test, bootstrap, governance, report, and local workspace items.
 - `docs/` remains at root because it is production Docs & Help.
 - `games/` remains at root because it is public game discovery.
 - `toolbox/` remains at root because it is the Creator toolbox/workspace.
+- Other public product roots such as `account/`, `admin/`, `legal/`, and `assets/` remain root-level product sections when present.
+
+## Final Src Layer Standard
+
+The final `src/` ownership model is:
+
+- `src/web/` for browser-facing deployable application modules used by public pages, account/admin surfaces, and Creator tools.
+- `src/api-runtime/` for deployable API/runtime service modules that back the shared Browser -> API -> Postgres/R2 contract.
+- `src/runtime/` for deployable game, tool, engine, and shared runtime capabilities.
+
+Transition rule:
+
+- Existing top-level `src/advanced/`, `src/api/`, `src/dev-runtime/`, `src/engine/`, `src/shared/`, and `src/tools/` directories are legacy transition buckets until explicit migration PRs move them.
+- Do not add new top-level `src/` layer names outside `src/web/`, `src/api-runtime/`, or `src/runtime/` without OWNER approval.
+- Do not use team names in runtime source filenames.
 
 ## Development Workspace Paths
 
-- `dev/docs_build/` owns active development governance, Project Instructions, PR workflow material, validation reports, and generated documentation-workspace artifacts.
+- `dev/docs_build/` owns active development governance, Project Instructions, and PR workflow material.
+- `dev/reports/` owns generated reports using flat filenames.
+- `dev/tests/` owns non-deployable test suites.
+- `dev/scripts/` owns development-only scripts and runners.
+- `dev/config/` owns development-only runner and tooling configuration.
+- `dev/workspace/artifacts/` owns generated non-report artifacts and ignored local temporary workspace output.
 - `dev/archive/` owns historical development reference material that is not active governance.
 - `dev/project-instructions/` is deprecated reference only when retained; it must point to `dev/docs_build/dev/ProjectInstructions/`.
-- Root `docs_build/`, root `archive/`, and root `project-instructions/` are not active workspace locations after the governance workspace move.
+- Root `docs_build/`, root `tests/`, root `archive/`, root `tmp/`, and root `project-instructions/` are not active workspace locations after the restructure.
+- Root `tmp/` may remain ignored as legacy local scratch only; required Codex ZIPs and generated temporary artifacts belong under `dev/workspace/artifacts/tmp/`.
+
+## Legacy Reference Exceptions
+
+Path references to old root `docs_build/`, `tests/`, `archive/`, or `tmp/` locations are allowed only when they are:
+
+- historical/reference content under `dev/archive/` or `dev/docs_build/dev/PR/reference/`
+- explicit legacy exception notes in active governance
+- ignore rules that keep obsolete local scratch from entering commits
+- migration reports documenting the old path and its replacement
+
+Active commands, templates, and Project Instructions must use the final `dev/`, `dev/reports/`, and `dev/workspace/artifacts/` paths.
 
 ## Creator Data Boundary
 
@@ -42,3 +74,5 @@ This document is governance only. It does not move runtime, UI, API, tests, or p
 ## PR Chain Boundary
 
 The development workspace restructure must proceed through sequential scoped PRs. A PR may only move or update the paths named in its purpose.
+
+Final path-governance PRs may document target paths and legacy exceptions, but they must not move deployable application code unless explicitly scoped.
@@ -0,0 +1,33 @@
+# PR_26179_OWNER_008-update-path-governance-final
+
+Generated: 2026-06-27T19:38:31.874Z
+Branch: PR_26179_OWNER_008-update-path-governance-final
+Base stack head before PR_008: f3c2e7a02
+ZIP: dev/workspace/artifacts/tmp/PR_26179_OWNER_008-update-path-governance-final_delta.zip
+
+## Purpose
+
+Finalize path governance after the dev workspace restructure chain and document the final root, src, and dev workspace standards.
+
+## Changes
+
+- Updated repository directory governance with final root ownership and legacy path exceptions.
+- Added the final `src/web/`, `src/api-runtime/`, and `src/runtime/` layer standard.
+- Updated canonical repository structure governance to point new work at final paths.
+- Updated README architecture wording to describe target src layers without moving current source directories.
+
+## Validation Summary
+
+| Status | Item | Notes |
+| --- | --- | --- |
+| PASS | Current branch is PR_26179_OWNER_008-update-path-governance-final | confirmed |
+| PASS | Documentation/governance-only scope | no protected runtime/product/API/database/test/script/config diffs |
+| PASS | Final root directory standard documented | repository_directory_standard.md names product root, src, dev, docs, games, toolbox, and public product roots |
+| PASS | Final src layer standard documented | src/web, src/api-runtime, and src/runtime documented with legacy transition buckets |
+| PASS | Final dev workspace standard documented | dev/docs_build, dev/reports, dev/tests, dev/scripts, dev/config, dev/archive, and dev/workspace/artifacts documented |
+| PASS | Old report root references absent from active target search | (no matches) |
+| PASS | Old <project folder>/tmp ZIP reference absent from active target search | (no matches) |
+| PASS | Final src path grep | 15 matching lines |
+| PASS | npm run validate:canonical-structure | passed |
+| PASS | git diff --check | passed |
+| PASS | Playwright impacted | not impacted; no runtime/test/browser behavior changed |
@@ -0,0 +1,8 @@
+# PR_26179_OWNER_008-update-path-governance-final Branch Validation
+
+| Status | Item | Notes |
+| --- | --- | --- |
+| PASS | Current branch is PR_26179_OWNER_008-update-path-governance-final | confirmed |
+| PASS | Documentation/governance-only scope | no protected runtime/product/API/database/test/script/config diffs |
+
+Result: PASS
@@ -0,0 +1,8 @@
+# PR_26179_OWNER_008-update-path-governance-final Manual Validation Notes
+
+- Confirmed branch: PR_26179_OWNER_008-update-path-governance-final
+- Confirmed no product/runtime/API/database/test/script/config files changed in this PR.
+- Confirmed final target src layers are documented only; no source folders were moved.
+- Confirmed old report root search returned no active matches.
+- Playwright was not run beyond impact assessment because this PR is documentation/governance-only.
+- Repo-structured ZIP path: `dev/workspace/artifacts/tmp/PR_26179_OWNER_008-update-path-governance-final_delta.zip`
@@ -0,0 +1,12 @@
+# PR_26179_OWNER_008-update-path-governance-final Requirement Checklist
+
+| Status | Item | Notes |
+| --- | --- | --- |
+| PASS | Finalize all Project Instructions and governance references to the new paths | Active governance references final dev/report/artifact paths and documents legacy exceptions. |
+| PASS | Document final root directory standard | repository_directory_standard.md and README updated. |
+| PASS | Document final src/ layer standard | src/web, src/api-runtime, src/runtime documented. Existing top-level src buckets are legacy transition only. |
+| PASS | Document final dev/ workspace standard | dev ownership for docs_build, reports, tests, scripts, config, archive, workspace/artifacts documented. |
+| PASS | Confirm no old docs_build/, tests/, archive/, or tmp/ path references remain unless documented as legacy exceptions | Old root paths are documented as legacy exceptions; active output/report refs use new paths. |
+| PASS | No runtime/product/API/database changes | Protected diff check returned no files. |
+
+Result: PASS
@@ -0,0 +1,9 @@
+# PR_26179_OWNER_008-update-path-governance-final Validation Lane
+
+| Status | Item | Notes |
+| --- | --- | --- |
+| PASS | npm run validate:canonical-structure | passed |
+| PASS | git diff --check | passed |
+| PASS | Playwright impacted | not impacted; no runtime/test/browser behavior changed |
+
+Scoped validation result: PASS