ci: add self-test workflow for pushes and pull requests

.github/workflows/test.yml

@@ -0,0 +1,33 @@
+name: test
+
+on:
+  push:
+    branches: [dev, main]
+  pull_request:
+
+jobs:
+  self-test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 10
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      # The suite shells out to python3 for the PDF bounding-box unittest
+      # (stdlib-only, no pip install needed).
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+
+      # Lockfiles are gitignored in this repo, so install resolves fresh.
+      # Install only @haposoft/cafekit deps — skips the cafekit-web Next.js tree.
+      - run: pnpm install --filter @haposoft/cafekit
+
+      - run: pnpm --filter @haposoft/cafekit test

docs/project-changelog.md

@@ -5,6 +5,9 @@ All notable changes to CafeKit are documented here, following
 
 ## [Unreleased]
 
+### Added
+- **CI test workflow** (`.github/workflows/test.yml`): runs the `@haposoft/cafekit` self-test suite (137 tests, Node 20 + pnpm 10 + Python 3.12) on every push to `dev`/`main` and on pull requests. Filtered install keeps the `cafekit-web` tree out of CI. Release publishing stays manual.
+
 ## [0.13.2] - 2026-06-21
 
 ### Added — Enforce scaffold on task creation