Isolation check FAILED — _isolation_check field is non-empty.

The blind agent reported passive awareness of:
- Internal filenames (index.html, settings.html, agent-guide.html)
- Directory structure (docs/bug-hunt/, docs/agent-ops-archive/)
- Recent work topics (convention-enforcement, e2e tests, data-privacy section)

Source: subprocess inherits cwd from parent. `claude --print` running in /Users/justnau/finlet
picks up git status + recent commits from its standard environment context, even when
launched under `env -i` with HOME pointing at a tmp dir.

Sanity-check only — does NOT hard-fail this iteration. Logged for visibility.

Possible launcher fix (future work): launch blind subprocess from a tmp cwd that is
NOT the finlet repo root, or pass --no-system-reminder if the CLI exposes one.
