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Sylpheed/docs
Sylpheed port agent 28d90449e6 port: which-focus -- a focus detector for the Decoder, with the control wired in
S00A is blocked on knowing which button a screenshot has focused.
`newgame_path.sh` assumed NEW GAME at boot, drove on it, and landed in a tutorial
mission -- HANDOFF Q5 measured focus as UNSTABLE across boots. Counting presses
cannot substitute: up from the first item wraps to the last, so no fixed number
of presses lands on a known item from an unknown start.

The Decoder's own attempt, a per-row brightness statistic, FAILED the control --
it picked NEW GAME on the capture whose filename says OPTIONS. The
render-difference method passes it, so this packages it as a script.

IT RUNS THE CONTROL ON EVERY INVOCATION, not once when it was written, and
refuses to report anything if the control fails.

  live-main-menu-options-focused  KNOWN ANSWER      OPTIONS         4.7x
  live-main-menu                  the question      NEW GAME       11.4x
  live-extras                     KNOWN from corpus MISSION SELECT  4.2x
  live-title-press-a              no menu at all    refuses         1.0x

The extras row is a second known answer I did not plant -- authored/flow.json
already records "MEASURED: EXTRAS opens focused on MISSION SELECT
(live-extras.png)" -- and the tool reaches it independently. The title row is the
negative control.

AND THE REFUSAL NOW CARRIES A NON-ZERO EXIT CODE. The first version printed "do
not act on this" and exited 0, so a caller scripting it -- which is the entire
point -- would have read a refusal as an answer. Same defect as a checker
claiming a check it skipped, and the fifth instance of that shape this session.

What it is not: it identifies focus in ONE FRAME and says nothing about what
selects focus. Q5's instability stands.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N7FiFFFwbvG2uxdcEh8HyF
2026-08-29 17:29:48 +00:00
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