The #1 remaining model reliability gap: the agent does the work (proposes
plan, executes all steps, writes back) but forgets to call complete_task,
leaving the session stuck in 'executing'. The eval showed 3/8 failures
with this pattern.
Fix: autoCompleteIfPlanDone — a structural safety net that fires at both
chat exit paths (normal completion + maxIterations). If the session has a
goal, the agent didn't call complete_task, and ALL plan steps are in a
terminal state (done/failed/replaced/skipped/blocked), auto-complete with
the agent's final text as the summary. Mirrors autoCompleteTrivialTask
but for structured tasks where the work is provably done.
Also: bump maxLLMRetries from 2 to 3 (complex multi-turn flows benefit
from one more retry on empty responses).