CLI reference
sanderling <command> [flags]sanderling test
Run a spec against an app for a fixed duration.
| Flag | Default | Description |
|---|---|---|
--spec |
required | Path to the TypeScript spec. |
--bundle-id |
required | Target app bundle ID (Android: applicationId). |
--launcher-activity |
resolved | Optional <pkg>/<activity> to launch.
Overrides default resolution. |
--platform |
android |
Target platform: android, ios, or
web. |
--avd |
optional (android) | Android AVD name to boot if no device is connected. Required only when no device is connected and multiple AVDs exist. |
--ios-device |
optional (ios) | iOS target: a simulator name/UDID to boot, or a connected device's name, UDID, or CoreDevice id. |
--ios-app-path |
optional (ios) | Path to the .app bundle for clear-state reinstall
(simulator via simctl, device via
devicectl). |
--duration |
5m |
Total test duration (30s, 5m,
2h, 1d). |
--seed |
0 |
PRNG seed. 0 uses a random seed and records it in
meta.json. |
--output |
./runs |
Output directory for traces. |
--clear-data |
true |
Clear app data before launching so the run starts from a fresh
install. Pass --clear-data=false to resume prior
state. |
sanderling replay [run-or-runs-dir]
Serve a local web UI for browsing traces. The positional argument is
optional and may point at either a runs directory (the parent of many
runs) or a single run directory (auto-detected by the presence of
meta.json). Defaults to ./runs.
| Flag | Default | Description |
|---|---|---|
--port |
0 (ephemeral) |
TCP port to listen on. |
--no-open |
false |
Skip opening the default browser on startup. |
--dev |
false |
Reverse-proxy non-API requests to the Vite dev server on
127.0.0.1:5173. |
See the replay UI page for the panel reference and keyboard shortcuts.
sanderling doctor
Check the host environment for a working sanderling setup.
sanderling doctor [--platform web|android|ios|ios-device|all]--platform defaults to all, which runs
every platform's checks (deduped). Pass a specific platform to scope the
output.
| Platform | Checks |
|---|---|
web |
headless Chromium can launch (the bundled CDP surface boots a real browser). |
android |
adb on PATH; emulator on PATH or under
ANDROID_HOME; Java 17+; embedded native sidecar JAR is
real. |
ios |
xcrun on PATH; simctl on PATH. The
simulator path drives the native companion with no JVM. |
ios-device |
the ios checks plus devicectl; the macOS
usbmuxd socket; a connected, paired device; App Store
Connect signing credentials present. |
sanderling version
Print the CLI version.
Flags coming in v0.1.0
--permissionsto pre-set OS-level permissions (for example--permissions location=allow,notifications=deny).--max-stepshard cap on step count.--exit-on-violationstop the run on the first property violation.
Tracked in the v0.1.0 milestone.