3e280d63de
P5 is the lowest unfinished milestone. This does not implement navigation; it
settles how a focused button is drawn, because three claims sat under that and
none had been checked from this side.
Refutation attempts, all three failed -- recorded either way, per PROTOCOL:
* HANDOFF ask 3's '(7,7)' focus offset SURVIVES, and more strongly than
stated: over a 15x14 scan of the whole offset space it is a UNIQUE
ISOLATED cell at 100% coverage on all five buttons, with (6,6) and (7,6)
both below 90%. The centre and pivot alignments reproduce the 78-84%
band the RE agent called misleading.
* ORACLE-CAPTURES' 'a crop, not a scale' SURVIVES. Its own evidence -- a
+/-6 px cross-correlation -- cannot tell a crop from a 0.9375 scale, so
it was re-tested with a scale-sensitive one: button text bands land at
design y + 23 for all three unoccluded buttons, an exactly 1:1 vertical
mapping. (The prose understates 45 missing rows as 'the missing row'.)
* My own suspicion that the declared geometry disagreed with the capture
by 6 px was MY ARITHMETIC ERROR, written up rather than quietly dropped:
I took the top-left as pos - pivot. pos IS the top-left; the pivot is the
anchor scale grows about and cancels at 100%, exactly the 'can be got
wrong invisibly' that screen_view.gd:120 warns about.
What is actually true, and what P5 does with it:
* The exporter ALREADY emits the focus record's second element, the 42x46
ring ptbtneff01, for all five buttons. That gap is in the renderer, not
the exporter -- nothing to change in crates/sylpheed-export.
* Base minus focus is (7,7) directly from the declared positions, so P5
draws each focus element at its own pos and authors no constant.
* ptbtn04 is 1 px off the 80 px grid ON THE DISC (base rows 162 242 322
401 482; focus rows a clean 155 235 315 395 475). So its base->focus
delta is (7,6) while its art aligns at (7,7). Do NOT derive focus
placement from the base by a constant: it would be wrong on exactly one
button and right on the other four.
Verified against captures rather than our other renderer: diffing
live-main-menu against live-main-menu-options-focused isolates one cluster at
x 506..702, y 398..445, and ptbtn04's focus record under pos-as-top-left spans
x 500..706, y 395..451. Under pos - pivot it predicts x 433..604, y 367..422,
which matches nothing in the capture and no other button either.
Also records an instrument that FAILED ITS CONTROL and was discarded: a masked
NCC template matcher returned NCC 0.096-0.206 with three of five results pinned
to the search boundary when asked to re-find the base sprites at their known
positions. None of its output is used. Filed so this is not rebuilt.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Evuhbt8pxKJEUvwfniwYkU
Sylpheed
A clean-room reverse engineering and port project for Project Sylpheed: Arc of Deception (Xbox 360, 2007).
Three things live here, in one repository so that a change spanning them lands as one commit:
| The decoders | crates/sylpheed-formats — the disc's formats, read and verified disc-wide |
| The port | port/ — a Godot 4 project, plus crates/sylpheed-export which converts a disc into the open asset tree it reads |
| The corpus | docs/re/ — what has been reverse engineered, with its evidence, its retractions and its dead ends |
You need your own copy of the game. No game content is in this repository and none ever will be. The exporter reads the disc you supply.
The oracle is the real game
sylpheed-cliand the Explorer are tools for verifying our decoding. They are hypotheses under test and they have been wrong. When something must be checked against the truth, the truth is the game running in Xenia Canary, captured — not any renderer of ours.
This is stated first because getting it backwards is the most expensive mistake this project has made.
Layout
crates/
sylpheed-formats/ the decoders. Disc-wide verified; the corpus is its spec
sylpheed-cli/ headless tools -- render a screen, dump a table, probe audio
sylpheed-viewer/ the Explorer: a human's window onto the disc. STATIC data only
sylpheed-export/ disc -> the open, moddable asset tree
port/ the Godot 4 project. Reads open formats ONLY
authored/ decisions that are NOT on the disc, each with its reason
data/
base/ generated by the exporter. Gitignored, never hand-edited
mods/ drop-in overrides. Yours
docs/
re/ the corpus: findings, refutations, method traps
game/ how the game is navigated -- menus, modals, flight
port/ the port's mission, its handoff contract, modding rules
agents/ how the agent team works together
tools/ capture harnesses, probes, the share tool
exchange/ transient inter-agent files. NOT in git
docker/ the agent containers
Where to start
docs/re/INDEX.md— what is decodeddocs/re/REFUTED.md— what has been tested and dieddocs/re/METHOD.md— traps this project has already paid fordocs/game/navigation.md— how the game is navigateddocs/port/MODDING.md— why the asset tree looks the way it does
Xenia Canary is a separate repository: it is a fork tracking upstream, and it carries our instrumentation.
Conventions
Confidence is per claim, never per document: ✅ CONFIRMED · 🟡 PROBABLE ·
❔ HYPOTHESIS · ❌ REFUTED. A withdrawn result is kept with its reasoning
rather than deleted — that is why the numbers here can be trusted.