Add HIG universal principles extraction (P1)

.github/workflows/evidence-freshness.yml

@@ -42,6 +42,7 @@ jobs:
           set +e
           node scripts/audit-evidence-freshness.mjs \
             --record consumer-reference/baselines/calibration.json \
+            --record platform-guides/hig-universal-principles.json \
             --as-of "$as_of" \
             --mode advisory \
             --json > evidence-freshness-report.json

.github/workflows/hig-principles.yml

@@ -0,0 +1,28 @@
+name: HIG principles extraction
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  hig-principles:
+    name: HIG principles record, guide, and freshness contracts
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        with:
+          persist-credentials: false
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        with:
+          node-version: 22
+      - uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
+        with:
+          bun-version: 1.3.14
+      - run: bun install --frozen-lockfile --ignore-scripts
+      - run: bun run validate:hig-principles
+      - run: bun run test:hig-principles

DOMAINS.md

@@ -28,7 +28,7 @@ This manifest is the source of truth for top-level StyleGallery domains. A domai
 | Layout | `layout/index.md` | Existing `GUIDE.md`, Layout-specific `guides/*.md`, and `recipes/*.md`; generated `patterns/**/*.md` and `CATALOG.md` remain at current paths. Shared `quality/**/*.md` infrastructure governs every domain without becoming a Layout leaf. |
 | Motion | `motion/index.md` | `motion/vocabulary.md`, `motion/review-workflow.md`, `motion/practice-reference.md`, `motion/decision-tree.md`, `motion/motion-brief.md`, `motion/interaction-recipes.md`, `motion/observed-choreography.md`, `motion/accessible-motion.md`, `motion/interruption-and-retargeting.md`, `motion/rendering-and-performance.md`, `motion/techniques/scroll-choreography.md`, `motion/techniques/kinetic-type.md` |
 | Design Engineering | `design-engineering/index.md` | `design-engineering/interface-craft.md`, `design-engineering/consumer-migration-readiness.md`, `design-engineering/reference-profiles/index.md`, `design-engineering/reference-profiles/governed-local/index.md`, `design-engineering/reference-profiles/external-adaptation/index.md`, `design-engineering/decision-tree.md`, `design-engineering/component-contract.md`, `design-engineering/worked-examples.md`, `design-engineering/state-management/decision-tree.md`, `design-engineering/state-management/index.md`, `design-engineering/state-management/patterns/derived-state.md`, `design-engineering/state-management/patterns/draft-and-baseline.md`, `design-engineering/state-management/patterns/id-selection.md`, `design-engineering/state-management/patterns/identity-reset.md`, `design-engineering/state-management/patterns/latest-request-wins.md`, `design-engineering/state-management/patterns/optimistic-overlay.md`, `design-engineering/state-management/patterns/single-flight.md`, `design-engineering/state-management/patterns/single-owner.md`, `design-engineering/state-management/patterns/submitted-snapshot.md`, `design-engineering/state-management/patterns/unsaved-navigation.md`, `design-engineering/state-management/patterns/url-state.md`, `design-engineering/state-management/patterns/versioned-restore.md`, `design-engineering/state-management/recipes/delete-undo.md`, `design-engineering/state-management/recipes/index.md`, `design-engineering/state-management/recipes/multi-step-form.md`, `design-engineering/state-management/recipes/search-detail.md`, `design-engineering/state-management/recipes/settings-save.md`, `design-engineering/state-management/state-brief.md`, `design-engineering/state-management/verification.md`, `design-engineering/native-interaction-contracts.md`, `design-engineering/text-input-and-internationalization.md`, `design-engineering/loading-and-feedback.md`, `design-engineering/evidence-patterns/autocomplete.md`, `design-engineering/evidence-patterns/bottom-navigation.md`, `design-engineering/evidence-patterns/breadcrumbs.md`, `design-engineering/evidence-patterns/dark-mode-contrast.md`, `design-engineering/evidence-patterns/data-tables.md`, `design-engineering/evidence-patterns/empty-states.md`, `design-engineering/evidence-patterns/error-recovery.md`, `design-engineering/evidence-patterns/faceted-filters.md`, `design-engineering/evidence-patterns/form-labels.md`, `design-engineering/evidence-patterns/index.md`, `design-engineering/evidence-patterns/inline-validation.md`, `design-engineering/evidence-patterns/input-masks.md`, `design-engineering/evidence-patterns/tabs-and-segmented-controls.md` |
-| Platform Guides | `platform-guides/index.md` | `platform-guides/apple-interaction.md`, `platform-guides/adaptation-workflow.md`, `platform-guides/android-interaction.md`, `platform-guides/windows-interaction.md`, `platform-guides/compatibility-matrix.md`, `platform-guides/adaptive-navigation.md`, `platform-guides/preferences-and-accessibility.md`, `platform-guides/input-and-focus.md` |
+| Platform Guides | `platform-guides/index.md` | `platform-guides/apple-interaction.md`, `platform-guides/adaptation-workflow.md`, `platform-guides/android-interaction.md`, `platform-guides/windows-interaction.md`, `platform-guides/compatibility-matrix.md`, `platform-guides/adaptive-navigation.md`, `platform-guides/preferences-and-accessibility.md`, `platform-guides/input-and-focus.md`, `platform-guides/hig-universal-principles.md` |
 | Design Terminology | `design-terminology/index.md` | `design-terminology/source-kinds.md`, `design-terminology/source-vocabularies.md`, `design-terminology/concept-families.md`, `design-terminology/relation-types.md`, `design-terminology/conflict-cases.md`, `design-terminology/comparison-workflow.md`, `design-terminology/token-semantics.md`, `design-terminology/interaction-semantics.md`, `design-terminology/typography-semantics.md` |
 | Expression | `expression/index.md` | `expression/direction-brief.md`, `expression/brand-studies.md`, `expression/directions/nocturne-editorial.md`, `expression/directions/warm-print.md`, `expression/techniques/gradient-atmosphere.md`, `expression/techniques/grain-and-texture.md`, `expression/techniques/webgl-hero.md`, `expression/directions/fintech-clarity.md`, `expression/directions/hardware-catalogue.md`, `expression/directions/developer-tool.md`, `expression/directions/korean-service.md`, `expression/techniques/drawn-products.md`, `expression/techniques/live-product-demos.md`, `expression/techniques/canvas-3d.md`, `expression/study-atlas.md`, `expression/measured-benchmarks.md`, `expression/techniques/image-weight.md`, `expression/techniques/display-type-calibration.md`, `expression/techniques/surface-detail.md`, `expression/anti-patterns.md` |
 

GOVERNANCE.md

@@ -41,6 +41,7 @@ Use this file before editing repository documentation. It names which file is au
 | Motion domain guidance | `motion/*.md` | Manual | None | `experimental` | Upstream revision, evidence boundary, or guidance changes. | `scripts/validate-domains.mjs` | Motion domain owner |
 | Design Engineering domain guidance | `design-engineering/*.md`, `design-engineering/state-management/**/*.md`, `design-engineering/evidence-patterns/*.md` | Manual | None | `experimental` | Upstream revision, evidence boundary, or guidance changes. | `scripts/validate-domains.mjs` | Design Engineering domain owner |
 | Platform Guides domain guidance | `platform-guides/*.md` | Manual | None | `experimental` | Platform version, upstream revision, evidence boundary, or guidance changes. | `scripts/validate-domains.mjs` | Platform Guides domain owner |
+| HIG universal principles extraction | `platform-guides/hig-universal-principles.json` with its manual guide `platform-guides/hig-universal-principles.md` | Manual, paraphrase-and-link only | None | `experimental` dated extraction | `review_by` deadline, HIG index page added, removed, or renamed, cited WCAG/Material 3/APG change, or audit misclassification. | `scripts/validate-hig-principles.mjs`, `scripts/test-validate-hig-principles.mjs`, `scripts/audit-evidence-freshness.mjs` | Platform Guides domain owner with Validation owner |
 | Design Terminology domain guidance | `design-terminology/*.md` | Manual; term and relation tables remain authoring sources | None | `experimental` | Source-kind, source-vocabulary, concept-family, relation-model, or conflict-case changes. | `scripts/validate-domains.mjs`, `scripts/validate-design-terminology.mjs` | Design Terminology domain owner |
 | Expression domain guidance | `expression/**/*.md` | Manual | None | `experimental` | Direction value, technique code, brand-study policy, or guidance changes. | `scripts/validate-domains.mjs` | Expression domain owner |
 | Expression anti-pattern catalog | `expression/anti-patterns.json`, `expression/anti-patterns.md` | Manual | None | `experimental` | Benchmark value, Showcase QA floor, entry, or detection-rule changes. | `scripts/validate-anti-patterns.mjs`, `scripts/test-validate-anti-patterns.mjs` | Expression domain owner with Validation owner |

consumer-reference/agent-native/v2/admission-policy.json

@@ -769,6 +769,11 @@
       "domain": "platform-guides",
       "lifecycle": "experimental"
     },
+    {
+      "repository_path": "platform-guides/hig-universal-principles.md",
+      "domain": "platform-guides",
+      "lifecycle": "experimental"
+    },
     {
       "repository_path": "platform-guides/index.md",
       "domain": "platform-guides",
@@ -1057,5 +1062,5 @@
       "code": "material_path_internal_excluded"
     }
   ],
-  "version_id": "sg:policy/material-admission-v2@sha256:d3a7ac528239965bddc336917239158b43a8e504f004f374789346f1feb86d5e"
+  "version_id": "sg:policy/material-admission-v2@sha256:f0f5758d8da48a15861f3cadc7e1cb437d59fecc71fdf8d9991466776cc9ff20"
 }

consumer-reference/agent-native/v2/schema/admission-policy.schema.json

@@ -13,8 +13,8 @@
     "media_type": { "const": "text/markdown" },
     "allowed_materials": {
       "type": "array",
-      "minItems": 195,
-      "maxItems": 195,
+      "minItems": 196,
+      "maxItems": 196,
       "items": {
         "type": "object",
         "additionalProperties": false,

consumer-reference/agent-native/v2/search-embeddings.json

@@ -629,9 +629,13 @@
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consumer-reference/policies/lifecycle-a2a-extension.json

@@ -94,8 +94,8 @@
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consumer-reference/policies/lifecycle-ag-ui-extension.json

@@ -94,8 +94,8 @@
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-      "file_sha256": "d93f49cff874bb809af8e73f7e08a75b37ea0ddd45a897f1673d8eb6c1941588",
-      "content_id": "sha256:d93f49cff874bb809af8e73f7e08a75b37ea0ddd45a897f1673d8eb6c1941588"
+      "file_sha256": "95939c914a4861896dc70b156f70d9958e382afe6016e5f30d8d9f18b893533b",
+      "content_id": "sha256:95939c914a4861896dc70b156f70d9958e382afe6016e5f30d8d9f18b893533b"
     },
     "forwarding": {
       "path": "scripts/agent-native/agui-projection.mjs",

eval/search/questions.json

@@ -1234,6 +1234,38 @@
         "expression/anti-patterns.md": 3,
         "expression/measured-benchmarks.md": 2
       }
+    },
+    {
+      "id": "hig01",
+      "lang": "en",
+      "kind": "real",
+      "must_pass": true,
+      "query": "Which Apple HIG principles apply to the web and which are Apple-specific?",
+      "qrels": {
+        "platform-guides/hig-universal-principles.md": 3,
+        "platform-guides/apple-interaction.md": 1
+      }
+    },
+    {
+      "id": "hig02",
+      "lang": "en",
+      "kind": "real",
+      "must_pass": true,
+      "query": "Map HIG accessibility guidance to WCAG 2.2 success criteria",
+      "qrels": {
+        "platform-guides/hig-universal-principles.md": 3,
+        "platform-guides/preferences-and-accessibility.md": 1
+      }
+    },
+    {
+      "id": "hig03",
+      "lang": "en",
+      "kind": "mismatch",
+      "must_pass": false,
+      "query": "checklist of iPhone design rules that also make sense for a website",
+      "qrels": {
+        "platform-guides/hig-universal-principles.md": 3
+      }
     }
   ]
 }