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Scan only bridged attribution tail #1805

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Merged
mikasenghaas merged 1 commit into from
Jun 23, 2026
+11 −2
Merged

Scan only bridged attribution tail #1805

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13 changes: 11 additions & 2 deletions verifiers/v1/graph.py
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Original file line number Diff line number Diff line change
Expand Up @@ -283,8 +283,17 @@ def previous_token_ids(self) -> tuple[list[int], list[int]] | None:
def prompt_message_spans(
self, tail_attribution: RenderedTokens
) -> list[tuple[int, int] | None]:
"""Convert tail-relative bridge spans into full-prompt message spans."""
return [None] * self.tail_start + tail_attribution.message_token_spans()
"""Convert bridge-tail attribution into full-prompt message spans."""
# Reused bridge tokens are unattributed, so scan only the newly rendered tail.
tail_spans = RenderedTokens(
message_indices=tail_attribution.message_indices[self.path_len :],
message_roles=tail_attribution.message_roles,
).message_token_spans()
# Tail spans are slice-relative; restore their full-prompt token offsets.
return [None] * self.tail_start + [
None if span is None else (span[0] + self.path_len, span[1] + self.path_len)
for span in tail_spans
]

def commit(self, response: Response) -> None:
_commit_turn(self, response)
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