bench-agentic.sh drove the ramp with tool_choice='required' and RAISED if a
turn returned no parseable tool call → the main loop caught it and broke,
aborting at the first miss. Reachable depth was bounded by tool-call
reliability at depth, not the TURNS/context budget — so on flaky parsers the
ramp stopped below the ~35K DeltaNet degrade zone the producer exists to
characterize (field-observed abort at turn 11 / ~22K).
Fix: on a no-parseable-tool-call turn, synthesize a tool call so the prompt
keeps growing by the same fixed ~chars (the fixture tool_result is injected
regardless and dominates the growth), flag tool_call_missed, and continue.
Genuine transport errors (HTTP/timeout) still propagate and stop the ramp.
Per-turn rows mark misses; a summary line reports "tool-call misses: N/M".
The optional non-tool RAMP_MODE the issue floats is largely subsumed — the
synthesize-on-miss path already lets the ramp reach configured depth on any
engine regardless of tool-call reliability.
Test: scripts/tests/test-bench-agentic-ramp.sh — mock SSE endpoint; asserts the
ramp reaches turn 3 under 100% tool-call misses (counted) AND the success path
is unchanged (no false misses). Offline, no GPU.
Caveat: guarantees reaching configured TURNS; whether the 15-turn fixture
exceeds 35K is separate (extend the fixture if not). Sibling bench-agentic fix
#498 stays separate.
Co-authored-by: noonghunna <[email protected]>
Co-authored-by: Claude Opus 4.8 <[email protected]>
