Module harness 

The observability-only aion_integrations::AgentHarness over a plain-stdout CLI agent. CliHarness — the [AgentHarness] implementation that drives a plain-stdout CLI agent.

[AgentHarness::start] spawns the configured command with piped stdout (stdin and stderr are inherited/ignored — there is no structured channel to write, and stderr stays the agent’s human logs), and hands the child’s stdout to a CliSession whose pump demuxes it into neutral events. There is no handshake: a plain-stdout agent advertises nothing, so the session’s capability set is empty by construction (the observability-only tier).

The harness is deliberately generic over the command it runs — it names no specific agent — so it drives any line-oriented process. The spec’s input is passed to the child as a single argument, so a fake in-crate line-emitter can echo the run identity back for tests.

Structs

CliHarness

A harness that runs each activity attempt as a plain-stdout CLI child process.