11 new test cases in test_state_reliability.py covering:
- atomic_write_json: produces valid JSON, no .tmp left behind, overwrites,
works with nested structures
- _load_actual_state: returns False on empty / truncated file, returns True
on valid files, preserves last-known-good state across a parse failure
- reconcile: empty/truncated services.json or incidents.json generates zero
actions (skip-cycle semantics proven end-to-end)
- healthy service with valid world state generates no spurious action
All 32 tests (11 new + 21 existing) pass.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
