33f141a3df
The port raised this as load-bearing and it is answered, without a speed factor. I expected to find the three cold boots slow and argue contamination. They are not. My capture reproduces them: publisher 4.263 s against 4.297 / 4.604 / 4.370, developer 3.457 s against 3.508 / 3.503 / 3.366. Four runs agree, so that defence is unavailable and I am not using it. The flaw is in the comparison. 2.125 s is the publisher's declared ANIMATION length; 4.3 s is how long the SCREEN is up, and the screen holds after the timeline ends. Measured as counts in one capture: the publisher is on screen for 219 presents and animates for about 128 of them. The falsifier would have found a contradiction at any units-per-second. The decisive number needs no speed factor: 51.4 presents per host-second on the publisher splash, 53.8 on the developer. Xenia's limiter marks vblank at 60 Hz and caps presents there. A 30 fps guest presents every second vblank, at most 30 per second, and a slow emulator can only make intervals longer. 51.4 > 30, so a 30 fps guest cannot produce this. A 60 fps guest can: 51.4 is 86% of 60, matching the vblank histogram's 14% drops. So 60 units/s is refuted by a count against a hard limit rather than by a duration against a fitted factor -- the argument the 2.13 s reconciliation could not make. The dwell corpus stands in its own terms. Those seconds are the screen's dwell on this emulator, reproducible, and were never a statement about units per second. Recording what I got wrong on the way: I first segmented the atlas eras as "both splashes then the title" and briefly had a 2x discrepancy that would have let me declare the dwell corpus contaminated. The segmentation was wrong, and the durations matching the corpus to 1% is what exposed it. A convenient answer from an unchecked segmentation is the same trap as a clean answer from an unguarded assumption. Reach unchanged: still one boot for the hash ratio. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Jc4pciRArGHfxGGhEbwp5t
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.