93b823eedf
Measured on 240 s parked on the real menu: no seam at all (zero runs >=0.3 s below median-18 dB in 232 s), and the loop is at 61.93 s, not the summed wave's 87.744 s length. Two instruments agree -- top correlation lag 61.909 s with r=-0.009 at 87.750, and slice location showing playback wrap at 61.93 three times. The final ~25.8 s, the fade-out and trailing silence, is never played. This port had authored loop: restart, measured the resulting 3.4 s of near-silence off its own Master bus, and reported it as the price of the missing loop point -- in BLOCKED and in a message to the Decoder. The measurement was correct and the attribution was wrong. Second time this fortnight I have measured something real and assigned it to the wrong side. Godot loops whole files, so the loop region has to BE the file: BgmSpec gains loop_end_s and the bed is trimmed to 61.930 s. Verified over 131 s on the port's own bus -- 5 near-silent windows, no run >=0.2 s, against 36 windows and 3.4 s. Also records their withdrawal of '8 of 10 three-chunk regions': that audit file was truncated mid-list with no summary line, so the multichannel-specificity claim is unsupported and my 25 stands. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N7FiFFFwbvG2uxdcEh8HyF
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.