feat(spc): prep for alpha publish and add CI publish workflow

Author: fergusbissetnhs

.github/workflows/spc-publish.yml

@@ -0,0 +1,50 @@
+name: Publish @nhs-fdp/spc
+
+on:
+  push:
+    tags:
+      - 'spc-v*'
+
+jobs:
+  publish:
+    name: Build and publish SPC package
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Use Node.js 22.x
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22.x
+          registry-url: 'https://npm.pkg.github.com'
+          scope: '@nhs-fdp'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build design tokens (smart)
+        run: npm run build:tokens:smart
+
+      - name: Verify tag matches SPC package version
+        run: |
+          PKG_VERSION=$(node -p "require('./packages/nhs-fdp-spc/package.json').version")
+          TAG_VERSION=${GITHUB_REF_NAME#spc-v}
+          echo "Package version: $PKG_VERSION"
+          echo "Tag version: $TAG_VERSION"
+          test "$PKG_VERSION" = "$TAG_VERSION"
+
+      - name: Build SPC package
+        run: npm run build
+        working-directory: packages/nhs-fdp-spc
+
+      - name: Publish @nhs-fdp/spc to GitHub Packages (alpha tag)
+        run: npm publish --tag alpha
+        working-directory: packages/nhs-fdp-spc
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

packages/nhs-fdp-spc/LICENSE

@@ -0,0 +1,7 @@
+ISC License
+
+Copyright (c) 2025 NHS FDP
+
+Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

packages/nhs-fdp-spc/README.md

@@ -47,6 +47,37 @@ import { SPCChart, SPCSpark } from '@nhs-fdp/spc';
 import { SPCChart } from '@nhs-fdp/design-system';
 ```
 
+## Installation (External via GitHub Packages)
+
+Until this package is on npmjs, install from GitHub Packages. First, authenticate npm to GitHub Packages (once per machine):
+
+Create a `.npmrc` in your user home directory or project root with:
+
+```ini
+@nhs-fdp:registry=https://npm.pkg.github.com
+//npm.pkg.github.com/:_authToken=YOUR_GITHUB_TOKEN
+```
+
+Then install the alpha build:
+
+```bash
+npm install @nhs-fdp/spc@alpha
+```
+
+Usage in your app:
+
+```tsx
+import { SPCChart } from '@nhs-fdp/spc';
+// Import the minimal SPC CSS bundle
+import '@nhs-fdp/spc/styles';
+```
+
+Notes:
+
+- Your GitHub token needs the “read:packages” scope (and access to the repository if private).
+- If your project has a `.npmrc` with a default registry, ensure the scoped registry line for `@nhs-fdp` is present as above.
+- Types ship with the package; no extra typings install is needed.
+
 ## Export Surface (Initial)
 
 | Entry | Description |

packages/nhs-fdp-spc/package.json

@@ -1,12 +1,20 @@
 {
   "name": "@nhs-fdp/spc",
-  "version": "0.0.0-internal.0",
-  "private": true,
-  "description": "Statistical Process Control (SPC) components and engine (internal package – subject to change)",
+  "version": "0.0.1-alpha.0",
+  "description": "Statistical Process Control (SPC) components and engine for the NHS FDP Design System",
   "type": "module",
   "main": "dist/index.cjs",
   "module": "dist/index.esm.js",
   "types": "dist/index.d.ts",
+  "license": "ISC",
+  "files": [
+    "dist",
+    "README.md",
+    "LICENSE"
+  ],
+  "publishConfig": {
+    "registry": "https://npm.pkg.github.com"
+  },
   "exports": {
     ".": {
       "types": "./dist/index.d.ts",
@@ -35,6 +43,8 @@
   "dependencies": {},
   "scripts": {
     "build": "vite build --config ../../config/vite.spc.config.ts && vite build --config ../../config/vite.spc.css.config.ts",
+    "exports:check": "node ../../scripts/spc-export-check.cjs",
+    "prepublishOnly": "npm run exports:check && npm run build",
     "test": "vitest run --dir ./tests"
   }
 }