Ports grok-build's action stationarity breaker. A polling loop looks like
progress from inside the turn — every step succeeds — so nothing stops it
and it burns the whole budget re-reading one file. Nudge at 8 identical
batches, halt at 16, halt a pure no-op run at 4.
Three defects were found and fixed before this landed, none of which the
gates caught:
- The check runs AFTER execute_tool_calls, not before. Before it, the
assistant's tool_calls are recorded with no results, so pushing the
nudge triggers repair_dangling_tool_calls: synthetic "cancelled by the
user" results get spliced in, the real results land after a user
message, and dedup misses them — the orphan tool_result shape that
draws a provider 400. It is Ok-gated too, since one `?` inside can
leave a call resultless.
- `TurnOutcome::StationarityHalted` is its own variant grouped with
Completed, not a reuse of Cancelled. As a cancellation it would report
StopReason::Cancelled, fire the abort lifecycle, kill the turn's
subagents, grow the goal harness back-off streak until three halts
paused a running goal, and let completion-requirement recovery re-run
the very turn halted for looping.
- The no-op gate is size-based, not name-based. kigi registers the shell
tool as `run_terminal_cmd` and renames it `run_terminal_command`, so
matching on "bash" silently disabled the tighter ceiling while every
test still passed.
ZacharyZhang-NY
ac23ebc9a1