Add Start devtools package

.changeset/config.json

@@ -0,0 +1,11 @@
+{
+  "$schema": "https://unpkg.com/@changesets/config@3.1.1/schema.json",
+  "changelog": false,
+  "commit": false,
+  "fixed": [],
+  "linked": [],
+  "access": "public",
+  "baseBranch": "main",
+  "updateInternalDependencies": "patch",
+  "ignore": []
+}

.changeset/initial-release.md

@@ -0,0 +1,6 @@
+---
+'@solidjs/start-devtools': minor
+---
+
+Add the Start development toolbar, runtime error overlay, and server-function inspector.
+

.github/workflows/ci.yml

@@ -0,0 +1,24 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 10.15.1
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: pnpm
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm build
+      - run: pnpm test
+      - run: pnpm check
+

.github/workflows/release.yml

@@ -0,0 +1,34 @@
+name: Release
+
+on:
+  push:
+    branches: [main]
+
+permissions:
+  contents: write
+  pull-requests: write
+  id-token: write
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 10.15.1
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: pnpm
+          registry-url: https://registry.npmjs.org
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm build
+      - run: pnpm test
+      - run: pnpm check
+      - uses: changesets/action@v1
+        with:
+          publish: pnpm release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}

README.md

@@ -2,5 +2,22 @@
 
 Development error and server-function tooling for Solid Start mode.
 
-For component and reactivity inspection, see [Solid Devtools](https://github.com/thetarnav/solid-devtools).
+`@solidjs/start-devtools` provides the toolbar used by the Solid Vite plugin in development. It includes runtime error inspection, source-mapped stack frames, and server-function request and response inspection.
+
+```sh
+pnpm add @solidjs/start-devtools
+```
+
+The Vite plugin mounts it automatically. Integrations can use the package directly:
+
+```tsx
+import { DevToolbar } from "@solidjs/start-devtools";
 
+<DevToolbar>
+  <App />
+</DevToolbar>;
+```
+
+The package is intended for development and should not be imported into production entries.
+
+For component and reactivity inspection, see [Solid Devtools](https://github.com/thetarnav/solid-devtools).

package.json

@@ -0,0 +1,76 @@
+{
+  "name": "@solidjs/start-devtools",
+  "version": "0.0.0",
+  "description": "Development error and server-function tooling for Solid Start mode",
+  "type": "module",
+  "module": "./dist/index.js",
+  "types": "./dist/types/index.d.ts",
+  "files": [
+    "dist"
+  ],
+  "exports": {
+    ".": {
+      "types": "./dist/types/index.d.ts",
+      "import": "./dist/index.js"
+    }
+  },
+  "scripts": {
+    "build": "rollup -c && tsc --emitDeclarationOnly",
+    "check": "package-check",
+    "test": "vitest run",
+    "release": "pnpm build && changeset publish"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/solidjs/start-devtools.git"
+  },
+  "bugs": {
+    "url": "https://github.com/solidjs/start-devtools/issues"
+  },
+  "homepage": "https://github.com/solidjs/start-devtools#readme",
+  "keywords": [
+    "solid",
+    "solidjs",
+    "devtools",
+    "server-functions"
+  ],
+  "license": "MIT",
+  "publishConfig": {
+    "access": "public"
+  },
+  "peerDependencies": {
+    "@solidjs/web": "^2.0.0-rc.0",
+    "solid-js": "^2.0.0-rc.0"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.29.0",
+    "@babel/preset-env": "^7.29.0",
+    "@babel/preset-typescript": "^7.28.0",
+    "@changesets/cli": "^2.30.0",
+    "@rollup/plugin-babel": "^6.1.0",
+    "@rollup/plugin-commonjs": "^25.0.8",
+    "@rollup/plugin-node-resolve": "^15.3.1",
+    "@skypack/package-check": "^0.2.2",
+    "@solidjs/web": "^2.0.0-rc.0",
+    "@types/node": "^24.0.0",
+    "babel-preset-solid": "^2.0.0-rc.0",
+    "error-stack-parser": "^2.1.4",
+    "html-to-image": "^1.11.13",
+    "prettier": "^3.1.0",
+    "rollup": "^4.5.0",
+    "rollup-plugin-cleaner": "^1.0.0",
+    "seroval": "^1.6.0",
+    "shiki": "^4.3.1",
+    "solid-js": "^2.0.0-rc.0",
+    "source-map-js": "^1.2.1",
+    "terracotta": "2.0.0-next.6",
+    "typescript": "^5.9.0",
+    "vitest": "^3.2.0"
+  },
+  "packageManager": "pnpm@10.15.1",
+  "pnpm": {
+    "onlyBuiltDependencies": [
+      "esbuild"
+    ]
+  }
+}