Module toolcall 

2026-09-26: Path-independence of tool calls: one target turn, whose correct answer is to call nothing, reached by three predecessor paths that share the same long prefix. The replay script offers no tools, and its comparison passes reworded prose, so it cannot see a tool call that moves with history.

Owner: bench, SSM poisoning gate. Invariants:

• Only the target’s tool calls are compared, raw and in order; its prose is not.

A  prefix → ack → TARGET
B  prefix → ack → a turn that calls get_current_weather → TARGET
C  prefix → ack → a turn that calls web_search          → TARGET

The user turns of the paths differ only in the interposed turn. Path A is the reference; the target’s tool_calls must equal A’s on B and C. The target asks for something no offered tool answers, so a call there is wrong whatever its wording.

Structs

Divergence

2026-09-26: One path disagreeing with the reference.

PathResult

2026-09-26: One path’s outcome: the target turn’s transcript.

Enums

Path

2026-09-26: A labelled predecessor path to TARGET.

Constants

CALLS_SEARCH

2026-09-26: The interposed turn of path C, which asks for a web_search call.

CALLS_WEATHER

2026-09-26: The interposed turn of path B, which asks for a get_current_weather call.

TARGET

2026-09-26: The target turn. Its answer is in the document the conversation already carries, and neither offered tool bears on it, so the correct reply calls nothing.

Functions

divergences

2026-09-26: Compare every path against the reference (Path::Direct). Returns one Divergence per path whose tool calls differ at all; there is no tolerance band as there is for replay prose. Empty when every path agrees, and also when no reference path is present.

reference_called

2026-09-26: Did the reference path itself call a tool on the target? A different finding from divergences: the driver fails the run on a divergence and only logs this one.

request_body

2026-09-26: The request body for a tool-offering turn: the replay probe’s greedy, seed-0 body plus tools and tool_choice: "auto", so the model decides whether to call.

tools

2026-09-26: The tool schemas offered on every turn of this probe.