a13dd42c2d
The page recorded the substituted-versus-additive distinction as unverified, with the port controlling it. It passes. A real music and SFX bed of 137.37 s, itself carrying 454 genuine zero runs -- which is what makes it an honest control -- had 1149 holes inserted at 8.37 gaps/s to +9.9 percent length, matching the measured ALSA profile, then stripped: original vs itself (ceiling) r 1.000 lag 0.0 s margin +0.141 padded vs original r 0.436 lag -12.2 margin +0.006 stripped vs original r 1.000 lag 0.0 margin +0.142 Two things beyond the yes. It runs the inference forwards: padding at this profile puts correlation squarely in the known-absent regime on a file whose contents are controlled, so the earlier captures were unusable for the reason claimed rather than for some other one -- until now that was reasoning backwards from a failure to a cause. And only one side needs stripping, since the stripped capture matches the UNSTRIPPED source at the ceiling, so a capture needs no preprocessing before being handed over and there is no shared step to get out of sync on. The danger is recorded as the part to repeat: stripping removes genuine silence too and cannot tell the two apart, so it is exact on additive ALSA padding and vandalism on a PulseAudio monitor capture where the silence replaced real audio. Running it on the wrong artefact would look like it worked. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QsEPXWVaEpyfudtR6re1Pd
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.