Neil c85d633837 test: fail unit tests that run a real agent CLI from PATH (#38961) ...

* test: stop unit tests from running the developer's real agent CLIs

A live relay test reached the host's real `claude --version` through the
inherited PATH. On a machine whose claude wrapper never exits, each run left
an orphaned loop behind (14 were found on one host, running for days).

- Add a unit-test setup guard that shadows agent CLI names on PATH with
  stand-ins that fail the test which ran them.
- Give the live relay test its own claude/codex stubs.
- Kill the whole process tree when the WSL guest's version probe times out.

* test: keep structured-session tests off the real codex CLI

These hosts get a scripted transport, but the at-rest `/` command read
spawns the resolved codex command directly, so on a machine with codex
installed each run started a real `codex app-server`. Point them at a
missing binary, as on CI.

* test: isolate agent discovery in session fixtures

2026-11-06 12:56:01 -08:00

..

qualification

test: fail unit tests that run a real agent CLI from PATH (#38961)

2026-11-06 12:56:01 -08:00