# Adversarial Bug Report: fix-stale-task-mtime-proxy

## Attack Vectors Tested
1. **Manual .state.lastedit manipulation**: A user could `touch .state.lastedit` to reset the timer — this is equivalent to `--touch` and is acceptable behavior
2. **Deleted .state.lastedit**: `_get_edit_timestamp()` falls back to `.state` mtime — correct
3. **Multiple tasks in implement phase**: `_touch_lastedit` called only for `primary` task (the first in-scope task) — acceptable, as the primary task is the one being edited
4. **Clock skew**: Uses `time.time()` consistently — not a concern on local system
5. **Stale task in single-task path**: Now correctly checked (was missing before this fix)

## Findings
No bugs found.

## Verdict: PASS