signalmesh-meshd 0.1.6

Outbound-only edge daemon for the SignalMesh Submesh Protocol — wrap local software as callable mesh coords with zero inbound ports.

signalmesh-meshd

Outbound-only edge daemon for the SignalMesh Submesh Protocol. It holds one persistent WebSocket to the SignalMesh cloud, walks ~/.signalmesh/harnesses/*/SKILL.md for op manifests, and executes call_requests as local subprocesses — no inbound ports, ever.

Install

pipx install signalmesh-meshd

Not on PyPI yet? Install straight from the built wheel:

pipx install /path/to/signalmesh_meshd-0.1.3-py3-none-any.whl

Quick start

Pair once — exchanges your SignalMesh key for a device_id + device_token, written to ~/.signalmesh/meshd.yaml at mode 0600:

meshd pair --key=smesh-XXXXXX --name=my-desktop

Connect — opens the outbound WebSocket, advertises discovered ops, and blocks serving call_requests until you kill it:

meshd connect

Invoke a coord from the cloud (this is what the SignalMesh backend does on your behalf when a mesh caller routes to your device):

curl -X POST https://acecalisto3-signalmesh.hf.space/api/submesh/call \
  -H "Content-Type: application/json" \
  -H "X-SignalMesh-Key: smesh-XXXXXX" \
  -d '{"coord": "submesh.my_desktop.echo_test.say", "input": {"msg": "hello mesh"}}'

Writing a SKILL.md manifest

Drop a directory under ~/.signalmesh/harnesses/<harness-name>/ containing a SKILL.md with YAML frontmatter. meshd parses the frontmatter block, refuses any exec argv containing shell metacharacters, and advertises one coord per subcommand.

~/.signalmesh/harnesses/echo-test/SKILL.md:

---
binary: /bin/echo
subcommands:
  - op_id: say
    exec: ["{msg}"]
    summary: "Echo a string back through the mesh."
    params_schema:
      msg: string
    timeout_ms: 5000
---

# echo-test

Minimal harness proving the mesh call → subprocess → response round trip.

This advertises submesh.<device_name>.echo_test.say, callable with {"msg": "..."}.

Android apps (APK) as mesh nodes

Any Android app reachable over adb can be a submesh node — mesh-anything includes your phone. Point meshd apk wrap at an installed package name or a local .apk (it installs it first):

meshd apk wrap com.example.app
meshd apk wrap ~/Downloads/some-app.apk

This resolves the launcher activity and writes an adb-backed SKILL.md harness exposing submesh.<device>.apk_<pkg>.{launch,stop,deeplink,tap,text,screenshot}. Restart meshd connect and the app's coords are advertised to the mesh like any other harness — same metachar guard, same shell=False execution. Requires Android platform-tools (adb) and a device or emulator visible to adb devices.

Android Studio toolchain as mesh capabilities

Wrap the SDK that ships with Android Studio — emulator, AVDs, adb — so a mesh caller can boot a headful emulator on your desktop, install builds, and drive demos/tests end-to-end:

meshd studio wrap                       # ~/Library/Android/sdk (or --sdk PATH)
meshd studio wrap-project ~/code/MyApp  # wraps the project's ./gradlew

Coords advertised after meshd connect:

submesh.<device>.android_avds.list                enumerate AVDs
submesh.<device>.android_emulator.boot            boot an AVD headful (detached)
submesh.<device>.android_adb.{devices,kill,install,screenshot,wait_boot}
submesh.<device>.android_project_<name>.{assemble,install,unit_test,instrumented}

Emulator boot detaches via a generated launch script, so the mesh call returns immediately while the emulator window appears on the host. Chain boot → wait_boot → install → apk_<pkg>.launch → screenshot for a full headful demo of a mobile app, driven entirely by mesh coords.

Safety model

Every argv token is checked against a shell-metachar denylist twice: once at manifest-load time (before a coord is even advertised) and once again after {param} substitution (before the subprocess actually runs) — a manifest can't sneak a malicious literal past you, and a caller can't sneak one in through input params either. Subprocesses always run with shell=False. Path-typed params are additionally checked against each subcommand's allow_paths glob list; anything that resolves outside the allowlist is rejected before it ever reaches argv.

Links

• 🤗 HuggingFace Space (canonical): https://huggingface.co/spaces/acecalisto3/SignalMesh
• Live app (API endpoints): https://acecalisto3-signalmesh.hf.space
• Interactive lander: https://kyklos.io/submesh/
• Protocol docs: see the Space's /api/submesh/* routes (device/pair, device/{id}/revoke, devices, edge, call)

License

MIT