Module agent 

The agent protocol for remote monitoring, and the agent loop itself.

A client runs ssh host rigtop --agent; the agent writes snapshots to stdout and reads commands from stdin. Both directions use JSON Lines: one JSON object per line, tagged by "type":

agent  -> client  {"type":"hello","protocol":1,"version":"0.1.0"}
agent  -> client  {"type":"snapshot","snapshot":{...}}
client -> agent   {"type":"set_interval","ms":2000}
client -> agent   {"type":"set_process_limit","limit":10}
client -> agent   {"type":"signal","pid":1234,"signal":"Terminate"}
agent  -> client  {"type":"signal_result","pid":1234,"signal":"Terminate","error":null}

The agent exits when stdin reaches end of file, so it never outlives the SSH connection that started it.

Enums

AgentMessage

Messages from the agent to the client.

ClientMessage

Messages from the client to the agent.

Constants

PROTOCOL_VERSION

Version of the wire format. Bumped on incompatible changes; adding fields to snapshots does not need a bump (all snapshot types default missing fields).

Functions

run_agent

Runs the agent until input is closed or output fails.

write_message

Writes one message as a JSON line and flushes it.