Hyeonsang Cho 582a632868

fix(agents): key read_file loop detection on its exact line window (#5486) ...

Layer 1 quantized read_file's line range into 200-line buckets, which
erased the offset inside a bucket: every read shorter than a bucket
collapsed onto its neighbours. Five sequential 40-line reads hashed
identically and tripped the hard stop, ending the run with a forced final
answer and stop_reason=loop_capped — on exactly the ranged reads that
read_file's own truncation notice tells the model to make.

Bucketing cannot separate progress from repetition in general: an equality
key can only approximate range overlap, and the approximation was erasing
the offset that distinguishes the two. Key on the exact window instead,
with an omitted end_line kept open-ended so a bare read and an explicit
start_line=1 still share one key.

Repeating a single range is still caught at the same threshold, and a read
loop that varies its bounds remains covered by the per-tool frequency
layer.

Co-authored-by: Willem Jiang <willem.jiang@gmail.com>

2026-09-17 09:36:55 +08:00

..

extension-api

feat(extensions): expose incremental run evidence reader (#5405)

2026-09-16 21:18:05 +08:00

harness

fix(agents): key read_file loop detection on its exact line window (#5486)

2026-09-17 09:36:55 +08:00