This is a beautiful edge-node architecture. Using UDP for out-of-band IPC
combined with a declarative filesystem state fits perfectly into a
microkernel-style operating environment.
Before dropping the code, here is a candid architectural assessment and a
proposed refinement for your orchestration strategy.
Architecture Assessment & Refinement
The Bottleneck: Network Filesystem Thrashing You mentioned writing the
heartbeats to /mnt/mesh_shared/.... If this mount is a network filesystem
(like SSHFS or NFS) or a synchronous ZFS pool, having dozens of workers
constantly overwriting JSON files every few seconds will aggressively hammer
your disk I/O and network limits.
The Wiser Way: Split Registration from Telemetry
Static Registration (FS): When the worker boots, it writes its
hostname-ip-port-pid.json to the shared drive once. This file contains the
immutable data: PID, listening port, and the public encryption key
placeholder.
Dynamic Telemetry (UDP): Instead of writing the heartbeat (load avg, RAM,
timestamps) to disk, the worker broadcasts a UDP datagram to a designated mesh
telemetry port (or the orchestrator's port).
This gives you a zero-I/O penalty for telemetry while maintaining a durable,
searchable directory of active nodes.
The Node.js Harness Architecture
I have designed a single encapsuled harness script that handles both of your
requirements.
It requires one external dependency for the CDP bridge: npm install ws.
What the Harness Does:
Port Hunting: Iterates through 11457-11999 to successfully bind an available
UDP socket.
Registration: Writes the static JSON file to your shared directory containing
a mock public key.
Heartbeat Loop: Every 5 seconds, it updates the JSON file (you can easily swap
this to a UDP broadcast later if you adopt the split strategy).
IPC Receiver: Listens for UDP packets. If valid JSON, it prints them. If a CDP
target is configured, it forwards them.
CDP Injector: If --cdp-port and --cdp-tab are passed, it discovers the
WebSocket URL, connects to Chrome, injects a floating UI overlay, and acts as
a bi-directional relay. 

How to use it:
Standard Worker Mode:
node src/runtime/harness.js

Expected Output: It binds a port (e.g., 11457), creates the JSON file in your
shared directory, and waits. You can test it from another terminal by sending
it JSON via netcat: echo '{"msg": "Hello Worker"}' | nc -u -w0 127.0.0.1 11457
CDP Injection Mode: Ensure Chrome/Chromium is running with --remote-debugging-p
ort=9222. You'll need to fetch the active Tab ID first (usually via curl
[http://127.0.0.1:9222/json](http://127.0.0.1:9222/json)).
node src/runtime/harness.js --cdp-port=9222 --cdp-tab=YOUR_TAB_ID

Expected Output: The harness will bind UDP, register on the FS, hook into the
WebSocket debugger for that tab, and inject a black/green floating UI box into
the live browser tab confirming the active IPC connection.
If you send a UDP packet structured like {"target": "browser", "expression":
"alert('AST Patched!')"} to the assigned port, the harness will relay it, and
the browser will instantly execute it.
How does this align with the Mesh OS window management system you're building
in the browser?