PR_26177_004-shared-color-foundation

docs_build/dev/BUILD_PR.md

@@ -1,43 +1,43 @@
-# PR_26177_003-shared-geometry-foundation
+# PR_26177_004-shared-color-foundation
 
 ## Purpose
 
-Add a small shared geometry foundation.
+Add a small shared color foundation.
 
 ## Source Of Truth
 
-This `BUILD_PR.md`, `PLAN_PR.md`, and the user request are the source of truth for `PR_26177_003-shared-geometry-foundation`.
+This `BUILD_PR.md`, `PLAN_PR.md`, and the user request are the source of truth for `PR_26177_004-shared-color-foundation`.
 
 ## Stack
 
-- Base branch: `PR_26177_002-shared-noise-foundation`
+- Base branch: `PR_26177_003-shared-geometry-foundation`
 
 ## Exact Scope
 
-- Add `src/shared/geometry/` foundation.
-- Include small reusable primitives/helpers such as vectors, rectangles, bounds, distance, clamp/intersection basics.
-- Add targeted tests for the shared geometry area.
-- No engine refactor.
+- Add `src/shared/color/` foundation.
+- Include hex/rgb/hsl conversion, clamp, lerp/blend helpers, luminance/contrast basics.
+- Add targeted tests for the shared color area.
+- No page styling changes.
 - Create required Codex reports under `docs_build/dev/reports/`.
 - Create repo-structured delta ZIP under `tmp/`.
 
 ## Exact Targets
 
 - `docs_build/dev/PLAN_PR.md`
 - `docs_build/dev/BUILD_PR.md`
-- `src/shared/geometry/geometry.js`
-- `tests/shared/GeometryFoundation.test.mjs`
-- `docs_build/dev/reports/PR_26177_003-shared-geometry-foundation.md`
-- `docs_build/dev/reports/PR_26177_003-shared-geometry-foundation_branch-validation.md`
-- `docs_build/dev/reports/PR_26177_003-shared-geometry-foundation_requirement-checklist.md`
-- `docs_build/dev/reports/PR_26177_003-shared-geometry-foundation_validation-lane.md`
-- `docs_build/dev/reports/PR_26177_003-shared-geometry-foundation_manual-validation-notes.md`
+- `src/shared/color/color.js`
+- `tests/shared/ColorFoundation.test.mjs`
+- `docs_build/dev/reports/PR_26177_004-shared-color-foundation.md`
+- `docs_build/dev/reports/PR_26177_004-shared-color-foundation_branch-validation.md`
+- `docs_build/dev/reports/PR_26177_004-shared-color-foundation_requirement-checklist.md`
+- `docs_build/dev/reports/PR_26177_004-shared-color-foundation_validation-lane.md`
+- `docs_build/dev/reports/PR_26177_004-shared-color-foundation_manual-validation-notes.md`
 - `docs_build/dev/reports/codex_review.diff`
 - `docs_build/dev/reports/codex_changed_files.txt`
 
 ## Out Of Scope
 
-- No engine refactor.
+- No page styling changes.
 - No browser-owned product data.
 - No runtime UI changes.
 - No browser storage changes.
@@ -51,9 +51,9 @@ This `BUILD_PR.md`, `PLAN_PR.md`, and the user request are the source of truth f
 Run exactly:
 
 ```powershell
-node ./scripts/run-node-test-files.mjs tests/shared/GeometryFoundation.test.mjs
-node --check src/shared/geometry/geometry.js
-node --check tests/shared/GeometryFoundation.test.mjs
+node ./scripts/run-node-test-files.mjs tests/shared/ColorFoundation.test.mjs
+node --check src/shared/color/color.js
+node --check tests/shared/ColorFoundation.test.mjs
 git diff --check
 ```
 
@@ -62,5 +62,5 @@ git diff --check
 Create repo-structured delta ZIP:
 
 ```text
-tmp/PR_26177_003-shared-geometry-foundation_delta.zip
+tmp/PR_26177_004-shared-color-foundation_delta.zip
 ```

docs_build/dev/PLAN_PR.md

@@ -1,22 +1,23 @@
-# PLAN_PR: PR_26177_003-shared-geometry-foundation
+# PLAN_PR: PR_26177_004-shared-color-foundation
 
 ## Purpose
 
-Add a small shared geometry foundation.
+Add a small shared color foundation.
 
 ## Scope
 
-- Add `src/shared/geometry/` foundation.
-- Include reusable primitives/helpers for vectors, rectangles, bounds, distance, clamp, containment, and intersection basics.
+- Add `src/shared/color/` foundation.
+- Include hex/rgb/hsl conversion helpers.
+- Include clamp, lerp/blend helpers, luminance, and contrast basics.
 - Add targeted tests.
-- No engine refactor.
+- No page styling changes.
 - No browser-owned product data.
 - No runtime UI changes.
 - No unrelated cleanup.
 
 ## Implementation Plan
 
-1. Add `src/shared/geometry/geometry.js`.
-2. Add `tests/shared/GeometryFoundation.test.mjs`.
-3. Validate vector, rectangle, bounds, distance, clamp, containment, and intersection behavior.
+1. Add `src/shared/color/color.js`.
+2. Add `tests/shared/ColorFoundation.test.mjs`.
+3. Validate conversion, blending, luminance, and contrast helpers.
 4. Produce required Codex reports and repo-structured ZIP.

docs_build/dev/reports/PR_26177_004-shared-color-foundation.md

@@ -0,0 +1,23 @@
+# PR_26177_004-shared-color-foundation
+
+Date: 2026-06-26
+Scope: Shared color foundation
+Status: PASS
+
+## Summary
+
+- Added `src/shared/color/color.js`.
+- Added hex/rgb/hsl conversion, clamp, lerp/blend, luminance, and contrast helpers.
+- Added targeted tests in `tests/shared/ColorFoundation.test.mjs`.
+- No page styling, runtime UI, API, database, or unrelated cleanup changes were made.
+
+## Validation
+
+- PASS: `node ./scripts/run-node-test-files.mjs tests/shared/ColorFoundation.test.mjs`.
+- PASS: `node --check src/shared/color/color.js`.
+- PASS: `node --check tests/shared/ColorFoundation.test.mjs`.
+- PASS: `git diff --check`.
+
+## Artifact
+
+- `tmp/PR_26177_004-shared-color-foundation_delta.zip`

docs_build/dev/reports/PR_26177_004-shared-color-foundation_branch-validation.md

@@ -0,0 +1,8 @@
+# PR_26177_004-shared-color-foundation Branch Validation
+
+Status: PASS
+
+- PASS: Branch `PR_26177_004-shared-color-foundation` was created from `PR_26177_003-shared-geometry-foundation`.
+- PASS: Stack base was clean before branch creation.
+- PASS: One PR purpose only: shared color foundation.
+- PASS: No `start_of_day` files changed.

docs_build/dev/reports/PR_26177_004-shared-color-foundation_manual-validation-notes.md

@@ -0,0 +1,5 @@
+# PR_26177_004-shared-color-foundation Manual Validation Notes
+
+Status: PASS
+
+Manual review confirmed this PR only adds shared color helpers and targeted tests. It does not change page styling, runtime UI, browser product-data ownership, API, or database behavior.

docs_build/dev/reports/PR_26177_004-shared-color-foundation_requirement-checklist.md

@@ -0,0 +1,11 @@
+# PR_26177_004-shared-color-foundation Requirement Checklist
+
+| Requirement | Status | Notes |
+|---|---:|---|
+| Add `src/shared/color/` foundation | PASS | Added `src/shared/color/color.js`. |
+| Include hex/rgb/hsl conversion | PASS | Added conversion helpers. |
+| Include clamp helpers | PASS | Added `clamp01` and `clampByte`. |
+| Include lerp/blend helpers | PASS | Added `lerpColor` and `blendColors`. |
+| Include luminance/contrast basics | PASS | Added relative luminance and contrast ratio helpers. |
+| No page styling changes | PASS | No CSS or page styling files changed. |
+| Add targeted tests | PASS | Added `tests/shared/ColorFoundation.test.mjs`. |

docs_build/dev/reports/PR_26177_004-shared-color-foundation_validation-lane.md

@@ -0,0 +1,22 @@
+# PR_26177_004-shared-color-foundation Validation Lane
+
+Status: PASS
+
+## Commands
+
+```powershell
+node ./scripts/run-node-test-files.mjs tests/shared/ColorFoundation.test.mjs
+node --check src/shared/color/color.js
+node --check tests/shared/ColorFoundation.test.mjs
+git diff --check
+```
+
+## Results
+
+- PASS: Targeted color foundation test.
+- PASS: Changed JS syntax checks.
+- PASS: `git diff --check`.
+
+## Not Run
+
+- Full samples smoke was not run by default.

docs_build/dev/reports/codex_changed_files.txt

@@ -1,11 +1,11 @@
 docs_build/dev/BUILD_PR.md
 docs_build/dev/PLAN_PR.md
-docs_build/dev/reports/PR_26177_003-shared-geometry-foundation.md
-docs_build/dev/reports/PR_26177_003-shared-geometry-foundation_branch-validation.md
-docs_build/dev/reports/PR_26177_003-shared-geometry-foundation_manual-validation-notes.md
-docs_build/dev/reports/PR_26177_003-shared-geometry-foundation_requirement-checklist.md
-docs_build/dev/reports/PR_26177_003-shared-geometry-foundation_validation-lane.md
+docs_build/dev/reports/PR_26177_004-shared-color-foundation.md
+docs_build/dev/reports/PR_26177_004-shared-color-foundation_branch-validation.md
+docs_build/dev/reports/PR_26177_004-shared-color-foundation_manual-validation-notes.md
+docs_build/dev/reports/PR_26177_004-shared-color-foundation_requirement-checklist.md
+docs_build/dev/reports/PR_26177_004-shared-color-foundation_validation-lane.md
 docs_build/dev/reports/codex_changed_files.txt
 docs_build/dev/reports/codex_review.diff
-src/shared/geometry/geometry.js
-tests/shared/GeometryFoundation.test.mjs
+src/shared/color/color.js
+tests/shared/ColorFoundation.test.mjs