4ce639c63d
Recorded per 'do not improvise around a blocker'. The question is what the game does at BGM_103's loop seam, where the corpus has 'not a seamless loop, no loop-point field found, so the menu loop is authored' and the port measures a 3.4 s near-silent seam. Audio needs the ALSA tee; detecting the title needs video, so --gpu=null was unavailable. Measured twice: the guest runs at ~0.20x real time (76.5 s of audio in 378 s of wall clock) and the title is not reached in 300 s even after tapping A to skip the movie, with the tee's slave ending in a broken pipe and Xenia in underrun recovery. Not a crash -- rss 701 MB with 9.5 GB free, and the 'Killed' line is this harness's own cleanup. REFUTED along the way: CONTAINER-NOTES says --gpu=null runs here die at ~70 s. The intro-audio capture ran 148.02 s under --gpu=null and ended on its probe's timer with the emulator alive and the whole ADV movie decoded. More than twice the quoted lifetime. That note had been the reason not to use --gpu=null for anything long, which is exactly what a clean audio capture needs. The route left, written down rather than attempted: use the XMA probe log as the screen oracle instead of video. Sitting on the main menu decodes exactly BGM_103's two waves, so their byte_sizes appearing IS the menu -- which is better provenance for an audio question than a screenshot anyway. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
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.