From a46565da69afd510fa9136d556a3718aac84d8ac Mon Sep 17 00:00:00 2001
From: drogers0 <david7rogers@gmail.com>
Date: Tue, 30 Jun 2026 20:05:54 -0500
Subject: [PATCH] ci: add GitHub Actions workflow (lint, typecheck, test,
 build)

Runs the four local gates from CLAUDE.md on every pull request and on pushes to
master: eslint, tsc (both tsconfigs), vitest, and the full Vite build (asserting
dist/manifest.json is produced). Single ubuntu job on Node 22 with npm cache and
npm ci; concurrency cancels superseded PR runs; least-privilege read-only token.

Unit tests run in Node with no DOM/service-worker/live Fidelity, so CI is a floor,
not a replacement for the in-Chrome manual verification CLAUDE.md requires.
---
 .github/workflows/ci.yml | 48 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 .github/workflows/ci.yml

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..95ac022
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,48 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches: [master]
+  workflow_dispatch:
+
+# Least privilege: the job only needs to read the repo.
+permissions:
+  contents: read
+
+# Cancel a PR's in-progress run when a new commit is pushed to the same ref.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  verify:
+    name: verify
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      # Ordered cheap → expensive for fast feedback. These mirror the local gates in CLAUDE.md.
+      - name: Lint
+        run: npm run lint
+
+      - name: Typecheck
+        run: npm run typecheck
+
+      - name: Test
+        run: npm run test
+
+      - name: Build
+        run: npm run build
+
+      # Fail loudly if the manifest copy step didn't produce a loadable extension.
+      - name: Verify build output
+        run: test -f dist/manifest.json