Set up CI

.gitea/workflows/test.yaml

@@ -0,0 +1,17 @@
+name: Test
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 9
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'pnpm'
+      - run: pnpm install
+      - run: pnpm test

AGENTS.md

@@ -26,8 +26,10 @@ It is written in TypeScript and compiled to a JavaScript module suitable for use
   - `dist/`: specific build artifacts. Do not edit files here directly.
 
 ## Testing
-- Currently, no automated test suite is configured.
-- `pnpm test` will exit with an error.
+- **Framework:** `vitest`
+- **Run tests:** `pnpm test`
+- **Watch mode:** `pnpm run test:watch`
+- **Location:** Tests are located in the `test/` directory.
 
 ## Contribution Guidelines
 - When adding new functionality, ensure proper types are exported in `src/types.d.ts` or within the module files.