4fa3099249
Answers the port's ask: ptbtneff01 is ANIMATED while a button is focused, not drawn once and held. The existing page said 'the ring SPINS' from one frame at a large angle, which is equally consistent with a static draw at a fixed angle. No angle is quoted anywhere. The 360-bin angular estimator written for this FAILED its own control -- a synthetic 30 deg came back as 0 deg (peak 0.596) while 90/180/270 came back exactly -- so it was not used. What settles it needs no angle: total annulus brightness is conserved to 0.4 % while individual angular bins swing by 24, i.e. brightness moving AROUND the ring, which excludes a pulse. The temporal-std map is a clean annulus, falling to ~1 both inside and outside the stroke, which excludes positional jitter. Period from the profile's autocorrelation: eight evenly spaced peaks, mean 2.177 s over nine revolutions. Even spacing is the internal check a drifting instrument cannot pass. That is 120 units = 60 frames = 2.00 s at a true 30 Hz. Also measured, same run: the ring is the ONLY moving thing on the settled main menu -- temporal std is exactly 0.000 on every unfocused button, the labels and the footer. And the ring's centre, located from the std map at game (520.7, 339.7), matches the declared leaf offset's prediction of (521, 340). Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KNR5Y79D1T4bBr6gJQaWFP
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.