2026-10-29 live test: task A was interrupted 61s after claim but had
never written anything (no host-state entry, no worktree, no trace,
no checkpoint); auto-resume ran goal-resume, which host rightly
refused, and the task failed. Refusal only makes sense for tasks
with progress but a lost breakpoint (those go through the P0
checkpoint rebuild); for a never-started task the only meaningful
outcome is a fresh run, identical to its first attempt (same task
id, same goal, worktree does not exist yet so nothing is
overwritten).
Change (claim path only, via _resolve_breakpoint_resume):
- rebuild from checkpoint first, unchanged;
- if rebuild fails AND _task_never_started holds (state entry,
checkpoint row, worktree dir, trace file all absent), clear the
breakpoint flag so the run takes the fresh goal path, with a
worker_fresh_restart audit event;
- any evidence of prior execution, or any check failure,
keeps the old refusal path (fail-closed); the auto-resume
count cap and no-progress stall guard still bound retries.
Tests: cloud/tests/test_neverstart_fresh.py, 10 items (fallback
holds, entry/checkpoint/worktree/trace presence each block it,
corrupt state blocks it, rebuild still wins when a checkpoint
exists); test_goal_resume's breakpoint-routing test now sets up
a task with a checkpoint so it still exercises goal-resume.
Full suites: cloud 1178 (skipped 4), host 104, deploy 39, green.
host