Files
Sylpheed/docs/re/data/jp-title-at-rest.txt
sylph-decoder c5d685ba15 re: the sweep IS drawn on the JP title -- and my gate was phase-locking the shutter
The occlusion hypothesis is refuted: build 7 draws the same three ROT strips at
higher alpha than English, so there was never an absence to explain.

The 0.32-vs-11.9 tension that motivated it was an artefact of my own instrument.
Both JP captures were shuttered on the plate pulse, and the plate's pulse is part
of the animation -- so the gate synchronises the shutter to the animation's phase.
Measured at the shutter instant, the sweep sits 25-26 px apart across two runs in
different locales and different sessions: 1.6 % of a ~1600 px traverse.

So the 0.32 I recorded as between-session capture noise measures my trigger's
repeatability, and I read it as evidence the title is still when it is evidence
the gate works. The era adjudication is unaffected -- margin 16.72 clears even the
un-locked 11.9 -- and unaffected for the reason that file already gave: correlated
noise cancels in a margin.

Refutation attempt on sylpheed-port's positional-mechanism rejection: FAILED, the
claim stands. Its residual sits inside lit logos, and the logo ROI is
byte-identical across five differently-phased frames in two sessions.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
2026-08-30 19:52:15 +00:00

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# The JAPANESE title (GP_TITLE build 7) at rest -- captured 2026-08-30.
#
# Asked for by the port agent: its title_jp row drifted (155/20498 ->
# 233/61208), localized to a 350x396 block at (405,74) -- the logo stack --
# and with NO capture of the JP title in the corpus it could say the two
# renderers had moved apart but not which one moved.
#
# MISSION.md has carried this as 'needs one more run' since 2026-08-29.
# Three earlier attempts failed to reach the interactive title in either
# locale. The reason is now known and was not the locale: A at the title
# needs a signed-in profile (title-a-press-fault.md), and no run had one.
#
# LOCALE: tools/re-capture/set_console_language.py ja -- canary's own
# persisted XConfig, offset located from struct landmarks. Restored to en
# afterwards; verified back at language=1.
#
# ✅ INDEPENDENT CONFIRMATION THE LOCALE TOOK: the XMA probe logged a
# DIFFERENT voice-context set from every English run --
# ja: 1112064, 1150976, 1177600
# en: 1294336, 1118208, 1171456
# The Japanese voice region is a different set of streams, so the switch
# reached the guest and is not just a menu-language cosmetic.
#
# 'AT REST' IS DEMONSTRATED, NOT ASSUMED. Five frames ~1.5 s apart after the
# plate pulse says the screen has settled:
#
# the port's ROI, 350x396 at (405,74) design space:
# frame 1 vs 0: max |d| 0, pixels differing >8: 0 / 138600
# frame 2 vs 0: max |d| 0, pixels differing >8: 0 / 138600
# frame 3 vs 0: max |d| 0, pixels differing >8: 0 / 138600
# frame 4 vs 0: max |d| 0, pixels differing >8: 0 / 138600
#
# the whole frame, as a CONTRAST CONTROL (the plate pulses, so this must
# move or the instrument is blind):
# frame 1 vs 0: 39584 px frame 3 vs 0: 71927 px
# frame 2 vs 0: 58303 px frame 4 vs 0: 69604 px
#
# So the logo stack is byte-identical across 6 s while 5-8 % of the frame is
# moving. The ROI is at rest and the instrument can see motion.
#
# WHAT THE CAPTURE SHOWS that the English title does not: the katakana
# subtitle under the wordmark, and a crystalline burst BEHIND the wordmark --
# the ptlogo3a/b/c + ptlogo_back2eff* stack, which ui-forced-backdrop and
# the tie-break work record as TRANSPARENT at rest on the English title.
# That is exactly the region the port's drift is localized to.
################################################################################
# SECOND, INDEPENDENT CAPTURE -- 2026-08-30, a fresh boot in a separate session.
# tools/re-capture/jp_title_session.sh (sets ja, captures, ALWAYS restores en).
#
# Why: the five frames above demonstrate the logo stack is at rest WITHIN a run.
# They say nothing about the axis sylpheed-port's drift was on -- BETWEEN runs,
# where a free-running clock lands somewhere else on a fresh boot. Nothing in
# this corpus covered that axis, and the ptlogo_eff3 era adjudication rests on
# a single capture.
#
# Within-run stability REPRODUCES in session 2:
# ROI 350x396 at (405,74): frames 1-4 vs 0, max |d| 0, 0 / 138 600 differing
# whole frame contrast: 47 278 / 51 034 / 58 922 / 72 958 px moving
#
# BETWEEN SESSIONS, inside the 388x423 box the era adjudication uses:
# 645 of 164 124 px differ, max |d| 41, RMSE 0.3215
# whole frame, for contrast: 116 492 px differ, max |d| 51
# -- so the two captures are genuinely from different sessions.
#
# THE VERDICT REPRODUCES TO THREE DECIMALS:
# vs session-1 capture vs session-2 capture
# stale era rest (108,72) 58.412 58.413
# fixed era rest (98,42) 41.690 41.692
# margin 16.722 16.721
#
# 📌 And the shape of that is the useful part: capture noise moves BOTH
# candidates together, so it very nearly cancels in a MARGIN. The absolute
# scores moved 0.001-0.002 between sessions and the margin moved 0.001, against
# an in-box capture noise of 0.32. A margin between two renders scored on one
# capture is far more robust than either score is.
################################################################################
# 🔴 CORRECTION -- 2026-08-30, same day. The BETWEEN-SESSIONS block above rests
# on a premise I have now measured and it is FALSE.
#
# It reasons that a second session probes a new axis, "where a free-running
# clock lands somewhere else on a fresh boot". It does not. Both captures were
# shuttered on the plate pulse, and the plate's pulse is PART of the title
# animation, so the gate synchronises the shutter to the animation's phase.
#
# Measured (structures/plate-pulse-phase-lock.md): at the shutter instant, the
# sweep strips sit 25-26 px apart between two runs in DIFFERENT locales and
# different sessions -- 1.6 % of a ~1600 px traverse.
#
# CONSEQUENCES:
# * "in-box capture noise of 0.32" is a PHASE-LOCKED LOWER BOUND, not capture
# noise. At an arbitrary phase the figure is 11.9 (two EN captures a
# plateau-phase apart). Do not reuse 0.32 as a noise floor.
# * I read 0.32 as showing the JP title is still. It shows the GATE works.
#
# WHAT SURVIVES UNCHANGED:
# * The margin 16.72 exceeds even the un-locked 11.9, so the era adjudication
# holds either way -- and holds FOR THE REASON THIS FILE GIVES: noise moves
# both candidates together and nearly cancels in a margin.
# * The five-frames-per-run at-rest result, which is not gated per frame and
# therefore does sample different phases.