First slice of the planned tech-debt cleanup. burnin.py was 1667 lines
and growing; staged extraction gives smaller diffs to review and a
clear bisect target if anything regresses.
Mechanical move only — no behaviour change. The two extracted modules:
* app/burnin/unlock.py — _UnlockGrant, _unlock_grants, PoolMemberError,
is_unlocked / unlock_expiry / grant_pool_unlock, plus the four
*_TOKEN constants and UNLOCK_TTL_SECONDS. Owns its module-level
state; opens its own DB connection in grant_pool_unlock so it
doesn't depend on the parent package's _db() helper.
* app/burnin/kill.py — _remote_pids dict and the kill_remote_process /
set_remote_pid / clear_remote_pid / get_remote_pid helpers. Pulled
out of __init__.py so the asyncssh-ignores-signals workaround lives
next to the state it operates on.
app/burnin/__init__.py re-exports every public symbol the rest of the
app imports — `from app import burnin; burnin.start_job(...)`,
`burnin.PoolMemberError`, `burnin.UNLOCK_TTL_SECONDS`, etc. all keep
working unchanged. Internal aliases `_remote_pids` and `_unlock_grants`
on the package root point at the SAME dict objects in the submodules,
so existing in-package mutations (set in stages, cleared in cleanup
callbacks) work without rewrite.
Test fix: tests/test_unlock_flow.py:test_expired_grant_returns_false
monkey-patches UNLOCK_TTL_SECONDS. The package-root alias is bound at
import time and won't propagate back to the submodule's read site, so
the test now patches `app.burnin.unlock.UNLOCK_TTL_SECONDS` directly.
Verification: 44/44 unit tests pass in container; /health 200;
container boots clean. routes.py, mailer.py, poller.py untouched —
the public API is identical.
Future: extract stages, task, _common in subsequent versions.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
