diff --git a/bun.lock b/bun.lock
index accfd2386..3a7e47b51 100644
--- a/bun.lock
+++ b/bun.lock
@@ -165,6 +165,7 @@
         "tailwindcss": "^4.2.1",
       },
       "devDependencies": {
+        "@types/bun": "^1.3.14",
         "tsdown": "^0.21.7",
         "typescript": "~5.8.3",
       },
@@ -2951,6 +2952,8 @@
 
     "@multiformats/dns/@libp2p/interface": ["@libp2p/interface@3.1.0", "", { "dependencies": { "@multiformats/dns": "^1.0.6", "@multiformats/multiaddr": "^13.0.1", "main-event": "^1.0.1", "multiformats": "^13.4.0", "progress-events": "^1.0.1", "uint8arraylist": "^2.4.8" } }, "sha512-RE7/XyvC47fQBe1cHxhMvepYKa5bFCUyFrrpj8PuM0E7JtzxU7F+Du5j4VXbg2yLDcToe0+j8mB7jvwE2AThYw=="],
 
+    "@open-pencil/dom-css/@types/bun": ["@types/bun@1.3.14", "", { "dependencies": { "bun-types": "1.3.14" } }, "sha512-h1hFqFVcvAvD9j9K7ZW7vd82aSA+rTdznZa+5bwvCwqSB1jmmfLcbIWhOLx1/+boy/xmjgCs/OMUL8hRJSmnPw=="],
+
     "@open-pencil/mcp/@types/node": ["@types/node@22.19.15", "", { "dependencies": { "undici-types": "~6.21.0" } }, "sha512-F0R/h2+dsy5wJAUe3tAU6oqa2qbWY5TpNfL/RGmo1y38hiyO1w3x2jPtt76wmuaJI4DQnOBu21cNXQ2STIUUWg=="],
 
     "@rollup/plugin-node-resolve/@rollup/pluginutils": ["@rollup/pluginutils@5.3.0", "", { "dependencies": { "@types/estree": "^1.0.0", "estree-walker": "^2.0.2", "picomatch": "^4.0.2" }, "peerDependencies": { "rollup": "^1.20.0||^2.0.0||^3.0.0||^4.0.0" }, "optionalPeers": ["rollup"] }, "sha512-5EdhGZtnu3V88ces7s53hhfK5KSASnJZv8Lulpc04cWO3REESroJXg73DFsOmgbU2BhwV0E20bu2IDZb3VKW4Q=="],
@@ -3167,6 +3170,8 @@
 
     "@multiformats/dns/@libp2p/interface/@multiformats/multiaddr": ["@multiformats/multiaddr@13.0.1", "", { "dependencies": { "@chainsafe/is-ip": "^2.0.1", "multiformats": "^13.0.0", "uint8-varint": "^2.0.1", "uint8arrays": "^5.0.0" } }, "sha512-XToN915cnfr6Lr9EdGWakGJbPT0ghpg/850HvdC+zFX8XvpLZElwa8synCiwa8TuvKNnny6m8j8NVBNCxhIO3g=="],
 
+    "@open-pencil/dom-css/@types/bun/bun-types": ["bun-types@1.3.14", "", { "dependencies": { "@types/node": "*" } }, "sha512-4N0ig0fEomHt5R0KCFWjovxow98rIoRwKolrYdCcknNwMekCXRnWEUvgu5soYV8QXtVsrUD8B95MBOZGPvr6KQ=="],
+
     "@open-pencil/mcp/@types/node/undici-types": ["undici-types@6.21.0", "", {}, "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ=="],
 
     "@vue-macros/common/ast-kit/@babel/parser": ["@babel/parser@7.29.2", "", { "dependencies": { "@babel/types": "^7.29.0" }, "bin": "./bin/babel-parser.js" }, "sha512-4GgRzy/+fsBa72/RZVJmGKPmZu9Byn8o4MoLpmNe1m8ZfYnz5emHLQz3U4gLud6Zwl0RZIcgiLD7Uq7ySFuDLA=="],
diff --git a/package.json b/package.json
index ce25eb300..137c634d7 100644
--- a/package.json
+++ b/package.json
@@ -13,8 +13,8 @@
     "preview": "vite preview",
     "tauri": "tauri",
     "lint": "bun run lint:structure && oxlint -c oxlint.json --type-aware --type-check src/ packages/core/src/ packages/vue/src/ packages/cli/src/ packages/mcp/src/ packages/dom-css/src/",
-    "lint:structure": "oxlint -c oxlint.json vite.config.ts vite/ src/ packages/core/src/ packages/vue/src/ packages/cli/src/ packages/mcp/src/ packages/dom-css/src/ packages/dom-css/tests/ tests/ scripts/ tools/",
-    "format": "oxfmt --write .oxfmtrc.json vite.config.ts vite/ src/ packages/core/src/ packages/cli/src/ packages/mcp/src/ packages/vue/src/ packages/dom-css/src/ packages/dom-css/tests/ tests scripts/ tools/",
+    "lint:structure": "oxlint -c oxlint.json vite.config.ts vite/ src/ packages/core/src/ packages/vue/src/ packages/cli/src/ packages/mcp/src/ packages/dom-css/src/ packages/dom-css/tests/ packages/dom-css/scripts/ tests/ scripts/ tools/",
+    "format": "oxfmt --write .oxfmtrc.json vite.config.ts vite/ src/ packages/core/src/ packages/cli/src/ packages/mcp/src/ packages/vue/src/ packages/dom-css/src/ packages/dom-css/tests/ packages/dom-css/scripts/ tests scripts/ tools/",
     "format:check": "bun run format && status=$(git status --porcelain -uall) && test -z \"$status\" || (echo \"$status\" && exit 1)",
     "check": "bun run build:packages && bun run lint && tsgo --noEmit && bun run check:vue && bun run check:i18n && bun run check:packages && bun run check:arch && bun run test:type-shapes && bun run test:tools && bun run test:dupes",
     "check:i18n": "bun tools/i18n/src/check-locales.ts",
diff --git a/packages/dom-css/README.md b/packages/dom-css/README.md
index f341c2573..379f784b4 100644
--- a/packages/dom-css/README.md
+++ b/packages/dom-css/README.md
@@ -4,15 +4,33 @@ DOM and CSS projection utilities for OpenPencil.
 
 This package is the compatibility layer between OpenPencil's scene graph and DOM-shaped design documents. It is intentionally separate from `@open-pencil/core` so browser/CSS parser integrations can evolve without adding DOM dependencies to the renderer and editor core.
 
-## Testing
+## Installation
 
-This package has a package-local test suite so it can be validated independently from the app shell:
+```sh
+bun add @open-pencil/dom-css @open-pencil/core
+```
+
+`@open-pencil/core` is a peer dependency because `@open-pencil/dom-css` projects to and from OpenPencil scene graphs. Consumers that only parse/serialize DesignDOM still need the peer installed for the package entrypoint.
+
+## Package-local checks
+
+This package can be validated independently from the app shell:
 
 ```sh
 cd packages/dom-css
 bun run test
+bun run typecheck
+bun run check
 ```
 
+Package scripts:
+
+- `bun run test` — package-local Bun tests for runtime, conversion, and Tailwind APIs
+- `bun run typecheck` — type-checks `src`, tests, and package scripts
+- `bun run build` — builds the distributable `dist` entrypoint
+- `bun run smoke:dist` — imports the built `dist` bundle and exercises the public API
+- `bun run check` — runs typecheck, tests, build, and dist smoke in sequence
+
 The repository also keeps integration/oracle coverage under `tests/engine/dom-css` and `tests/e2e/dom-css`. The package-local suite focuses on the library's public API, while the repo-level E2E suite verifies browser `getComputedStyle()` parity through Playwright.
 
 ## Runtime model
diff --git a/packages/dom-css/package.json b/packages/dom-css/package.json
index 5768dedf5..3d2fbc156 100644
--- a/packages/dom-css/package.json
+++ b/packages/dom-css/package.json
@@ -27,8 +27,11 @@
   ],
   "scripts": {
     "build": "bunx tsdown --config tsdown.config.ts",
+    "check": "bun run typecheck && bun run test && bun run build && bun run smoke:dist",
     "prepack": "bun run build",
-    "test": "bun test tests"
+    "smoke:dist": "bun scripts/smoke-dist.ts",
+    "test": "bun test tests",
+    "typecheck": "bunx tsc --noEmit -p tsconfig.test.json"
   },
   "repository": {
     "type": "git",
@@ -43,6 +46,7 @@
     "@open-pencil/core": "workspace:*"
   },
   "devDependencies": {
+    "@types/bun": "^1.3.14",
     "tsdown": "^0.21.7",
     "typescript": "~5.8.3"
   },
diff --git a/packages/dom-css/scripts/smoke-dist.ts b/packages/dom-css/scripts/smoke-dist.ts
new file mode 100644
index 000000000..efc892058
--- /dev/null
+++ b/packages/dom-css/scripts/smoke-dist.ts
@@ -0,0 +1,39 @@
+import {
+  compileTailwindCSS,
+  createHeadlessCSSRuntime,
+  htmlToSceneGraph,
+  serializeHTML,
+  type DesignDocument
+} from '../dist/index.js'
+
+const document: DesignDocument = {
+  type: 'document',
+  children: [
+    {
+      type: 'element',
+      tagName: 'article',
+      attrs: { class: 'card' },
+      children: [{ type: 'text', text: 'OpenPencil' }]
+    }
+  ]
+}
+
+const html = serializeHTML(document)
+if (!html.includes('OpenPencil')) {
+  throw new Error('Expected built serializeHTML() to emit document text')
+}
+
+const css = await compileTailwindCSS(['flex', 'w-80'])
+if (!css.includes('.w-80')) {
+  throw new Error('Expected built compileTailwindCSS() to emit Tailwind utility CSS')
+}
+
+const graph = await htmlToSceneGraph('<article class="card">OpenPencil</article>', {
+  cssText: '.card { display: flex; width: 320px; }',
+  runtime: createHeadlessCSSRuntime()
+})
+const page = graph.getPages()[0]
+const card = page ? graph.getChildren(page.id)[0] : undefined
+if (card?.type !== 'FRAME' || card.width !== 320) {
+  throw new Error('Expected built htmlToSceneGraph() to produce a sized frame')
+}
diff --git a/packages/dom-css/tsconfig.json b/packages/dom-css/tsconfig.json
index 2be6a3b13..1d2b189ea 100644
--- a/packages/dom-css/tsconfig.json
+++ b/packages/dom-css/tsconfig.json
@@ -12,11 +12,9 @@
     "skipLibCheck": true,
     "esModuleInterop": true,
     "resolveJsonModule": true,
+    "types": ["bun"],
     "paths": {
-      "#dom-css/*": ["./src/*"],
-      "#core/*": ["../core/src/*"],
-      "@open-pencil/core": ["../core/src/index.ts"],
-      "@open-pencil/core/*": ["../core/src/*"]
+      "#dom-css/*": ["./src/*"]
     }
   },
   "include": ["src/**/*.ts", "src/**/*.d.ts"],
diff --git a/packages/dom-css/tsconfig.test.json b/packages/dom-css/tsconfig.test.json
new file mode 100644
index 000000000..5c81eab53
--- /dev/null
+++ b/packages/dom-css/tsconfig.test.json
@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "noEmit": true
+  },
+  "include": ["src/**/*.ts", "src/**/*.d.ts", "tests/**/*.ts", "scripts/**/*.ts"],
+  "exclude": ["node_modules", "dist"]
+}