Determinism checklist

Use this checklist for local and CI-safe changes:

• Use stable ordering for rendered lists/maps (sorted(...), stable key ordering in JSON output).
• Seed or monkeypatch randomness in tests (random.random, UUID/time sources) when behavior depends on it.
• Use LF (\n) newlines for generated text artifacts and patches.
• Keep tests offline by default; network tests must be explicitly marked (@pytest.mark.network) and are skipped by default.
• Avoid time-based sleeps in tests. Inject a fake sleep callback and assert calls instead.
• Prefer temp directories (tmp_path) and explicit fixtures over shared mutable state.