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Sylpheed/tools/re-capture/wave2_probe.py
Sylpheed RE agent ff921c097d re: diff inside the 116 entity records — no arrival flag found, two probe defects
Since the record count is flat, an arrival would have to flip a field inside a
record. This diffed all 116 records every 5 s for 170 s of Stage 02 flight.

The prediction under test -- groups of 3, 3, 3, 2, 1 records changing state at
t = 90, 120, 170, 210, 240 s -- did not appear. Changes are spread evenly across
ticks with no cluster at any predicted time and no field that transitions once
for exactly three records. Three explanations survive and this run cannot
separate them: the timetable's t is not seconds (at 30 Hz the whole phase-1
schedule finishes inside 8 s, before the first sample); arrival is not marked in
these records; or the mission was not in phase 1.

Supporting, not conclusive: only 10 of 116 records ever changed a byte, and 106
never changed at all. Live entities would be moving, so that fits the
pre-allocated roster reading -- but Stage 02's roster is turret-heavy and a
turret does not move while alive, so "inert" and "not yet arrived" are not
distinguishable here.

Two defects in my own probe, recorded rather than quietly fixed:

  - label() resolved to '?' for all 116 records, so nothing could be tied back
    to a squadron. That association is what would have made the result
    decisive -- "the three records that changed at t=90 are ADN110, ADN111,
    ADN112" is evidence; "records 18, 32, 99" is not. unit_discover.py already
    solves this and should be reused.
  - RECLEN=0x200 was assumed, not measured. The busiest fields are the last
    eight words of the window, which is what spilling into the next object
    looks like.

Method error kept: the first attempt deferred all analysis to the end and the
turn timeout killed it with 240 s of data in memory and nothing written. The
probe now streams transitions to disk and prints a partial ranking every 60 s.
With a 219 s cold-boot title movie, an end-only report has ~300 s of budget and
one bad estimate loses the whole run.
2026-08-24 12:21:48 +00:00

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