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The distinction is the port s and it is sharper than the framing this page had. PulseAudio s monitor SUBSTITUTES: audio that existed is replaced by silence to keep the wall clock, so information is destroyed and deleting the holes only compresses time unevenly. Xenia s padding is ADDITIVE: the silence is inserted between samples the guest emitted, so nothing is lost and every real sample is present and in order. So stripping all-channel-zero runs from an ALSA-tee capture is exact rather than a repair, which means even the 0.70x rendered capture at 9.98 percent padding is usable for correlation, where none of the PulseAudio-monitor captures ever were however they were tuned. Recorded as unverified: the port is controlling it by padding a known source to match and checking the stripped result correlates back. Consequence for check-capture recorded too: its silence and gap-rate rule was built when only damage existed and cannot distinguish genuine emulator padding from capture damage, so a FAIL on an ALSA-tee capture is a statement about the recording path rather than the file s usability. Also promotes the runaway guard to a first-class CONTAINER-NOTES entry at the port s request -- 7.34 GB in 50 seconds at about 250x real time is not a footnote -- and adds --gpu=null there, which is what takes the guest from 0.70x to 0.96x and stops the padding, with its two caveats: no video for provenance, and runs die at about 70 s with PM4_DRAW_INDX failures. 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.