stuckKillCount is a lifetime counter — incremented by self-healing on each stuck-kill
and reset ONLY by a manual retry — so a long task that genuinely advances between
intermittent stalls could be terminalized by accumulation toward maxStuckKills (default 6),
even though it is making progress.
Reset the streak in TaskStore.updateStep when a step reaches a terminal forward status
(done/skipped), the single chokepoint every step-completion surface routes through (legacy
fn_task_update, graph markStepDone, fn_task_done). It deliberately does NOT rescue a task
wedged re-running the same failing step — no step completes between those kills, so it still
terminalizes as designed; it only bounds the budget to consecutive stalls. Complements the
verification fan-out cap (PR #1708) that keeps verification fast in the first place.
New regression suite asserts reset on done/skipped/graph-source-done and NO reset on
in-progress advance or ignored out-of-order transitions. Merge gate + full @fusion/core
suite (6242 tests) + engine self-healing/stuck-detector (442 tests) green.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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