feat(stewdio): import the blank-page motion-brief skill

README.md

@@ -88,7 +88,7 @@ the product unless they directly support a named design/build workflow.
 
 Read the detailed contracts:
 
-- [`docs/skill-architecture.md`](docs/skill-architecture.md) — the current 156-capability estate, cuts, merges, families, packages, and routing model.
+- [`docs/skill-architecture.md`](docs/skill-architecture.md) — the current 157-capability estate, cuts, merges, families, packages, and routing model.
 - [`docs/architecture.md`](docs/architecture.md) — ownership, catalog, and inclusion boundary.
 - [`docs/capability-lifecycle.md`](docs/capability-lifecycle.md) — evidence, review, and lifecycle transitions.
 - [`docs/bookmark-curation.md`](docs/bookmark-curation.md) — safe intake through review packet.

THIRD_PARTY_NOTICES.md

@@ -9,5 +9,6 @@ Stack owns command mappings and package metadata, not the upstream skill impleme
 | Matt Pocock skills | mattpocock/skills | `391a2701dd948f94f56a39f7533f8eea9a859c87` | MIT |
 | David Ondrej skills | davidondrej/skills | `5c99080334072075eb9e0a17837f7d24e4f3e6ae` | MIT |
 | Emil Kowalski skills | emilkowalski/skills | `c8a79627b59d72d764d6ab6f2c87c09a48169833` | MIT |
+| Stewdio blank-page skill | StewdioAI/blank-page | `cd42b37fa7cd0a5550e51f45cc8f82f63377b98c` | MIT |
 
 Stack-Codex is Stack-owned repository content, bundled under `packages/stack-codex/content` so a GitHub clone contains the complete eight-skill package. Its package pin, `483015638591618e884d4c21f1fa037b645bb872e33acf063fa7a5f802c80df3`, is a deterministic SHA-256 digest over sorted relative paths and exact file bytes. It is not an external upstream and does not appear in the third-party table above.

artifacts/audits/phase1-architecture/capability-reconciliation.json

@@ -126,6 +126,7 @@
       "skills/imported/matt/matt-triage/SKILL.md": "skills/imported/matt/matt-triage/capability.json",
       "skills/imported/matt/matt-wayfinder/SKILL.md": "skills/imported/matt/matt-wayfinder/capability.json",
       "skills/imported/matt/matt-writing-great-skills/SKILL.md": "skills/imported/matt/matt-writing-great-skills/capability.json",
+      "skills/imported/stewdio/blank-page/SKILL.md": "skills/imported/stewdio/blank-page/capability.json",
       "skills/imported/studio/design/asset-generation/SKILL.md": "skills/imported/studio/design/asset-generation/capability.json",
       "skills/imported/studio/design/design-system/SKILL.md": "skills/imported/studio/design/design-system/capability.json",
       "skills/imported/studio/design/layout-strategy/SKILL.md": "skills/imported/studio/design/layout-strategy/capability.json",
@@ -284,6 +285,7 @@
       "skills/imported/matt/matt-triage/SKILL.md",
       "skills/imported/matt/matt-wayfinder/SKILL.md",
       "skills/imported/matt/matt-writing-great-skills/SKILL.md",
+      "skills/imported/stewdio/blank-page/SKILL.md",
       "skills/imported/studio/design/asset-generation/SKILL.md",
       "skills/imported/studio/design/design-system/SKILL.md",
       "skills/imported/studio/design/layout-strategy/SKILL.md",
@@ -326,8 +328,8 @@
     "missing": []
   },
   "counts": {
-    "callable_skills": 156,
-    "manifests": 156,
+    "callable_skills": 157,
+    "manifests": 157,
     "package_exports": 20,
     "private_declarations": 1,
     "unclassified": 0

config/runtime-targets.json

@@ -1,6 +1,6 @@
 {
   "schema_version": 1,
-  "catalog_digest": "82746e82d33ae72d52e029aa3758fd469d02644ddc2adb584652872f31316bea",
+  "catalog_digest": "fc8fee82769187387a9e66ecf35ae6c67ba572454d56a4f02d1e13de8872182e",
   "targets": [
     {
       "name": "claude",

config/stack-maintenance.json

@@ -14,6 +14,7 @@
     "emil-design-eng",
     "review-animations",
     "emil-skills",
+    "stewdio-skills",
     "illo-skill",
     "codex-plugin-marketplace",
     "claude-plugin-marketplace",
@@ -103,6 +104,7 @@
     "skills/imported/matt/",
     "skills/imported/david/",
     "skills/imported/emil/",
+    "skills/imported/stewdio/",
     "skills/design/review-animations/",
     "docs/stack-maintenance.md"
   ],

docs/skill-architecture.md

@@ -7,16 +7,16 @@ Stack is a runtime-neutral control plane for software work. Logical command IDs
 The refactor began with 150 callable skills. Nine personal-operations and
 knowledge-management workflows were integrated into their existing native
 owners and removed from Stack, leaving 141 capabilities. The full Emil Kowalski
-collection (15 more pinned imports under `skills/imported/emil/`) brings the
-catalog to 156 capabilities: 148 active capabilities and eight deprecated
-compatibility routes.
+collection (15 more pinned imports under `skills/imported/emil/`) and Stewdio's
+`blank-page` (`skills/imported/stewdio/`) bring the catalog to 157 capabilities:
+149 active capabilities and eight deprecated compatibility routes.
 
 | Family | Capabilities |
 | --- | ---: |
 | Core | 5 |
 | Product | 6 |
 | Planning | 7 |
-| Design | 28 |
+| Design | 29 |
 | Engineering | 71 |
 | Orchestration | 11 |
 | Review | 5 |

packages/imported-skills/package.json

@@ -1 +1 @@
-{"schema_version":1,"provider":"imported-skills","registry":"registry/upstreams.json","source_mode":"pinned-import","copy_upstream_source":false,"providers":["matt","david","emil"],"provenance_rule":"Functional family placement does not replace provider identity."}
+{"schema_version":1,"provider":"imported-skills","registry":"registry/upstreams.json","source_mode":"pinned-import","copy_upstream_source":false,"providers":["matt","david","emil","stewdio"],"provenance_rule":"Functional family placement does not replace provider identity."}

registry/capabilities.json

@@ -567,6 +567,69 @@
       "validation_class": "representative-route",
       "visibility": "extended"
     },
+    {
+      "artifact_type": "skill",
+      "audit_status": "reviewed",
+      "canonical_name": "blank-page",
+      "commands": [
+        "stack.design"
+      ],
+      "context": {
+        "inputs": [
+          "request",
+          "workspace-context"
+        ],
+        "outputs": [
+          "capability-result"
+        ]
+      },
+      "disposition": {
+        "evidence_gap": null,
+        "next_review_trigger": "Reassess on source, export, or runtime-target change.",
+        "status": "keep"
+      },
+      "domain": "design",
+      "family": "design",
+      "lifecycle": "active",
+      "overlaps": [],
+      "ownership": {
+        "package": "imported-skills",
+        "provider": "stewdio",
+        "source_path": "skills/imported/stewdio/blank-page/SKILL.md"
+      },
+      "provenance": {
+        "license": "MIT",
+        "posture": "imported-upstream",
+        "source_identity": "upstream:stewdio/skills/blank-page"
+      },
+      "purpose": "Turn a one-line motion / animation / design brief into the full prompt: a committed look grounded in five reference images, three motion references, numbered beats with a turn, and the refs and assets attached. Also tightens edit notes. Use for \"/blank-page\", \"expand this prompt\", \"make this prompt more specific\", \"what is missing from this prompt\", \"help me write the prompt for X\", or whenever a one-line animation / composition / design brief is about to be handed to an agent.",
+      "role": "leaf",
+      "runtimes": {
+        "publish_targets": [
+          "claude",
+          "codex"
+        ],
+        "supported": [
+          "claude",
+          "codex"
+        ]
+      },
+      "schema_version": 1,
+      "source": {
+        "skill_path": "skills/imported/stewdio/blank-page/SKILL.md"
+      },
+      "trust_class": "read-only",
+      "validation": {
+        "evidence": [
+          "reviewed-estate-refactor",
+          "structural-classification",
+          "primary-runtime-parity"
+        ],
+        "status": "validated"
+      },
+      "validation_class": "representative-route",
+      "visibility": "extended"
+    },
     {
       "artifact_type": "skill",
       "audit_status": "reviewed",
@@ -9870,7 +9933,7 @@
   "catalog_kind": "stack-capability-catalog",
   "schema_version": 1,
   "summary": {
-    "callable_entrypoint_count": 156,
-    "capability_count": 156
+    "callable_entrypoint_count": 157,
+    "capability_count": 157
   }
 }

registry/maintenance-imports.json

@@ -115,6 +115,23 @@
           "target": "skills/imported/emil/emil-write-swift"
         }
       ]
+    },
+    {
+      "id": "stewdio",
+      "display_name": "Blake Shao (Stewdio)",
+      "target_root": ".",
+      "target_prefix": "",
+      "mapping": "explicit-source-json",
+      "source_metadata": "references/source.json",
+      "license": "MIT",
+      "retained_targets": [],
+      "retained_files": [],
+      "targets": [
+        {
+          "source": "skills/blank-page",
+          "target": "skills/imported/stewdio/blank-page"
+        }
+      ]
     }
   ]
 }

registry/maintenance-sources.json

@@ -132,6 +132,16 @@
       "target_paths": ["skills/imported/emil/emil-animate", "skills/imported/emil/emil-animate-expo", "skills/imported/emil/emil-animation-performance", "skills/imported/emil/emil-animation-vocabulary", "skills/imported/emil/emil-apple-design", "skills/imported/emil/emil-ask-sonner", "skills/imported/emil/emil-break-ui", "skills/imported/emil/emil-choreograph", "skills/imported/emil/emil-find-animation-opportunities", "skills/imported/emil/emil-improve-animations", "skills/imported/emil/emil-mobile-native", "skills/imported/emil/emil-pick-ui-library", "skills/imported/emil/emil-prototype", "skills/imported/emil/emil-remove-animations", "skills/imported/emil/emil-write-swift"],
       "required_exports": ["emil-animate", "emil-animate-expo", "emil-animation-performance", "emil-animation-vocabulary", "emil-apple-design", "emil-ask-sonner", "emil-break-ui", "emil-choreograph", "emil-find-animation-opportunities", "emil-improve-animations", "emil-mobile-native", "emil-pick-ui-library", "emil-prototype", "emil-remove-animations", "emil-write-swift"]
     },
+    {
+      "id": "stewdio-skills",
+      "target": "Blake Shao (Stewdio) imported skill collection",
+      "disposition": "catalog-managed-provider",
+      "provider_ref": "StewdioAI/blank-page",
+      "pin_source": "registry/upstreams.json:stewdio",
+      "provider_id": "stewdio",
+      "target_paths": ["skills/imported/stewdio/blank-page"],
+      "required_exports": ["blank-page"]
+    },
     {
       "id": "illo-skill",
       "target": "illo external plugin and marketplace",

registry/migrations/2026-07-23-skill-layout.json

@@ -46,6 +46,11 @@
       "destination": "skills/design/better-icons/SKILL.md",
       "source": "skills/better-icons/SKILL.md"
     },
+    {
+      "canonical_name": "blank-page",
+      "destination": "skills/imported/stewdio/blank-page/SKILL.md",
+      "source": "skills/imported/stewdio/blank-page/SKILL.md"
+    },
     {
       "canonical_name": "bolder",
       "destination": "skills/imported/impeccable/bolder/SKILL.md",

registry/upstreams.json

@@ -6,6 +6,7 @@
     {"id":"stack-codex","kind":"repository-package","canonical_source":"https://github.com/thecolormaroun/stack.git","pin":{"type":"sha256","value":"b773ec2e1f6353693184d7bda47bec9ca90663b5526c4c6690fec7e6cdf49595"},"license":"Stack-owned repository content","exports":["orchestrate-parallel-goals","stack-gemini-review","stack-ideate","stack-lfg","stack-mega","stack-review","stack-ship","stack-sync"],"install":"repository-bundle","bundle_path":"packages/stack-codex/content","adapters":["stack.explore","stack.build","stack.orchestrate","stack.review","stack.ship","stack.maintain","stack.run"],"compatibility":["tests/test_command_registry.py","tests/test_upstream_packages.py"],"last_known_good":{"pin":"b773ec2e1f6353693184d7bda47bec9ca90663b5526c4c6690fec7e6cdf49595","metadata_digest":"b773ec2e1f6353693184d7bda47bec9ca90663b5526c4c6690fec7e6cdf49595"}},
     {"id":"matt","kind":"imported-collection","canonical_source":"https://github.com/mattpocock/skills.git","pin":{"type":"git-commit","value":"391a2701dd948f94f56a39f7533f8eea9a859c87"},"license":"MIT","license_sha256":"0e7ac423bf2c6e223b7c5b156f8cf72da49d748e56a1641402c31f22ad07dbb5","exports":["matt-code-review","matt-implement","matt-tdd"],"install":"pinned-import","adapters":["stack.build","stack.review"],"compatibility":["tests/test_upstream_packages.py"],"last_known_good":{"pin":"391a2701dd948f94f56a39f7533f8eea9a859c87","metadata_digest":"314c8e07b7e3989b4844e9d0a6f760001bd4955e09b1fc0f6d27f04cf5f6dd8d"}},
     {"id":"david","kind":"imported-collection","canonical_source":"https://github.com/davidondrej/skills.git","pin":{"type":"git-commit","value":"5c99080334072075eb9e0a17837f7d24e4f3e6ae"},"license":"MIT","license_sha256":"1bd321a3b9cfa8d4af2105e20edd69d830df0b28e83a1b0255558f888e493981","exports":["david-handoff","david-goal-loop","david-read-all-adrs"],"install":"pinned-import","adapters":["stack.orchestrate","stack.learn"],"compatibility":["tests/test_upstream_packages.py"],"last_known_good":{"pin":"5c99080334072075eb9e0a17837f7d24e4f3e6ae","metadata_digest":"7c680c10b3be8907f0e0b214d3913bccbae17cbb839d7d565cf37f8cedc218b4"}},
-    {"id":"emil","kind":"imported-collection","canonical_source":"https://github.com/emilkowalski/skills.git","pin":{"type":"git-commit","value":"c8a79627b59d72d764d6ab6f2c87c09a48169833"},"license":"MIT","license_sha256":"4ff5bdb7887ec1435c9cab0e8d1a7caee704d894d65c2a008ccc68b1cc2f260b","exports":["emil-animate","emil-animate-expo","emil-animation-performance","emil-animation-vocabulary","emil-apple-design","emil-ask-sonner","emil-break-ui","emil-choreograph","emil-design-eng","emil-find-animation-opportunities","emil-improve-animations","emil-mobile-native","emil-pick-ui-library","emil-prototype","emil-remove-animations","emil-write-swift","review-animations"],"install":"pinned-import","adapters":["stack.design"],"compatibility":["tests/test_upstream_packages.py"],"last_known_good":{"pin":"c8a79627b59d72d764d6ab6f2c87c09a48169833","metadata_digest":"914284e55376793590c835fc17b79e7dba8f0325539d5180d750fbebf8292966"}}
+    {"id":"emil","kind":"imported-collection","canonical_source":"https://github.com/emilkowalski/skills.git","pin":{"type":"git-commit","value":"c8a79627b59d72d764d6ab6f2c87c09a48169833"},"license":"MIT","license_sha256":"4ff5bdb7887ec1435c9cab0e8d1a7caee704d894d65c2a008ccc68b1cc2f260b","exports":["emil-animate","emil-animate-expo","emil-animation-performance","emil-animation-vocabulary","emil-apple-design","emil-ask-sonner","emil-break-ui","emil-choreograph","emil-design-eng","emil-find-animation-opportunities","emil-improve-animations","emil-mobile-native","emil-pick-ui-library","emil-prototype","emil-remove-animations","emil-write-swift","review-animations"],"install":"pinned-import","adapters":["stack.design"],"compatibility":["tests/test_upstream_packages.py"],"last_known_good":{"pin":"c8a79627b59d72d764d6ab6f2c87c09a48169833","metadata_digest":"914284e55376793590c835fc17b79e7dba8f0325539d5180d750fbebf8292966"}},
+    {"id":"stewdio","kind":"imported-collection","canonical_source":"https://github.com/StewdioAI/blank-page.git","pin":{"type":"git-commit","value":"cd42b37fa7cd0a5550e51f45cc8f82f63377b98c"},"license":"MIT","license_sha256":"4533bc64e6e26958fd9bf4f9a56b422f9ab31b7dbcfac7bc23a8bd0d5cbdfde9","exports":["blank-page"],"install":"pinned-import","adapters":["stack.design"],"compatibility":["tests/test_upstream_packages.py"],"last_known_good":{"pin":"cd42b37fa7cd0a5550e51f45cc8f82f63377b98c","metadata_digest":"faeea6b4be818bbe31cc77d5e64dbaf45f882e201bc59ce23344da4a3dcae368"}}
   ]
 }

scripts/apply-skill-layout.py

@@ -19,7 +19,7 @@
 
 ROOT = Path(__file__).resolve().parents[1]
 MIGRATION_PATH = ROOT / "registry/migrations/2026-07-23-skill-layout.json"
-IMPORT_PROVIDERS = {"matt", "david", "impeccable", "studio", "ui", "emil", "taste-skill-suite"}
+IMPORT_PROVIDERS = {"matt", "david", "impeccable", "studio", "ui", "emil", "stewdio", "taste-skill-suite"}
 
 
 class LayoutError(ValueError):
@@ -70,7 +70,7 @@ def destination_for(manifest: dict[str, Any], source: str) -> str:
         if provider == "taste-skill-suite":
             provider_dir = "taste-skill-suite"
         # Preserve the collection's inside layout, but remove its old root.
-        old_root = {"matt": "matt", "david": "david", "impeccable": "impeccable", "studio": "studio", "ui": "ui-skills", "emil": "emil-design-eng", "taste-skill-suite": "taste-skill-suite"}[provider]
+        old_root = {"matt": "matt", "david": "david", "impeccable": "impeccable", "studio": "studio", "ui": "ui-skills", "emil": "emil-design-eng", "stewdio": "stewdio", "taste-skill-suite": "taste-skill-suite"}[provider]
         relative = Path(*parts[2:]) if len(parts) > 2 and parts[1] == old_root else Path(parts[-1])
         return (Path("skills/imported") / provider_dir / relative / "SKILL.md").as_posix()
     # Stack-owned collections remain collections, including CDO and CPO.

scripts/classify-capabilities.py

@@ -41,11 +41,12 @@
     "ideate": "stack.explore",
 }
 PRIMARY_CAPABILITIES = {"core-stack", "core-run", "cpo"}
-# Emil Kowalski collection imports; the rest of that collection falls through to engineering.
-EMIL_DESIGN = {
+# Pinned design imports (Emil Kowalski, Stewdio); the rest of Emil's collection falls through to engineering.
+PINNED_DESIGN_IMPORTS = {
     "emil-animate", "emil-animate-expo", "emil-animation-vocabulary", "emil-apple-design", "emil-choreograph",
     "emil-find-animation-opportunities", "emil-improve-animations", "emil-mobile-native", "emil-prototype",
     "emil-remove-animations",
+    "blank-page",
 }
 PURPOSE_OVERRIDES = {
     "agent-operating-stack": "Deprecated compatibility alias for the canonical Stack root router.",
@@ -64,7 +65,7 @@ def canonical_json(value: Any) -> str:
 
 
 def provider_for(path: str) -> tuple[str, str]:
-    for provider in ("matt", "david", "impeccable", "studio", "ui", "emil", "taste-skill-suite", "other"):
+    for provider in ("matt", "david", "impeccable", "studio", "ui", "emil", "stewdio", "taste-skill-suite", "other"):
         if path.startswith(f"skills/imported/{provider}/"):
             return provider, "imported-skills"
     for prefix, provider in (("skills/matt-", "matt"), ("skills/david-", "david"), ("skills/impeccable/", "impeccable"), ("skills/studio/", "studio"), ("skills/ui-skills/", "ui"), ("skills/emil-", "emil"), ("skills/taste-skill-suite/", "impeccable")):
@@ -85,7 +86,7 @@ def family_for(name: str, path: str) -> str:
         return "product"
     if path.startswith("skills/studio/research/") or name in {"field-theory-bookmark-synthesis", "fieldbook-source-split", "david-deep-research", "david-research-prompt", "david-youtube-transcript", "matt-research", "muller-brockmann-grid-systems", "userinterface-wiki"}:
         return "knowledge"
-    if path.startswith(("skills/studio/design/", "skills/impeccable/", "skills/ui-skills/", "skills/cdo/")) or name in {"cdo", "emil-design-eng", "illo", "better-icons", "review-animations", "ui-design-brain", "make-interfaces-feel-better", "design-intelligence", "rams", "deslop", "taste-skill-suite-soft-skill", "taste-skill-suite-redesign-skill", "cdo-taste-skill"} or name in EMIL_DESIGN:
+    if path.startswith(("skills/studio/design/", "skills/impeccable/", "skills/ui-skills/", "skills/cdo/")) or name in {"cdo", "emil-design-eng", "illo", "better-icons", "review-animations", "ui-design-brain", "make-interfaces-feel-better", "design-intelligence", "rams", "deslop", "taste-skill-suite-soft-skill", "taste-skill-suite-redesign-skill", "cdo-taste-skill"} or name in PINNED_DESIGN_IMPORTS:
         return "design"
     if name in {"tdd", "matt-tdd", "matt-implement", "matt-prototype", "matt-diagnosing-bugs", "matt-codebase-design", "matt-domain-modeling", "matt-improve-codebase-architecture", "matt-ask-matt", "react-doctor", "simplify", "knip", "fix-sentry-issues", "gemini-review"}:
         return "engineering"