CLI runs on Node 20+: npx storebound (bunx keeps working)

- cli/lib/rt.ts: the runtime layer on node: modules (spawn / spawnSync with Bun's defaults, exit codes and
  "Executable not found", which with PATHEXT, sleep, serve, Glob, hasher, gunzip, stdin, SQLite, packageRoot,
  config imports with a type-stripping fallback for Node 20); every Bun.* use in cli/ goes through it
- tools/gen-embedded.ts -> cli/lib/embedded.ts: templates/, cli/shots/*.html and Play's Data safety form embedded
  (replaces Bun text imports; the bundle and the compiled sidecar carry them), checked fresh by bun run ci
- package.json: bin dist/storebound.mjs (Node ESM bundle, tools/build-node.ts, prepack), engines node >=20
- bun run ci: node bundle + node smoke (real node: --version, help, check same as Bun, scan, release plan --help,
  init, MCP handshake + tool call); Forgejo CI sets up Node 20; tests/node-compat.test.ts guards cli/
- install writes npx MCP commands when run with Node; bin/storebound falls back to Node
- docs: npx storebound init (Node 20+) or bunx storebound init

.forgejo/workflows/ci.yml

@@ -73,6 +73,10 @@ jobs:
       # (cli/shots/browser.ts sandboxArgs), Playwright's own launches already pass it
       - name: Headless Chromium (browser tests, desktop boot check)
         run: bunx playwright install --with-deps chromium
+      # the npm bundle runs on Node 20+: tools/ci.ts smoke-tests dist/storebound.mjs with the oldest supported Node
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
       # the runner sets CI=true in the job and it wins over the workflow env above: set CI=full for the command
       # itself, or tools/ci.ts skips the desktop Rust tests and clippy when the push did not touch src-tauri
       - name: bun run ci