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Both were found by following RUNNING.md on this host from a clean checkout, and both fail in a way that blames the wrong thing. `godot --path port` without a prior `--import` produces THIRTY parse errors naming half the project -- ScreenView, MenuAudio, Gamepad, MenuFlow, ExportTree all "not declared", each cascading into "cannot infer the type of ..." -- and then hangs. That reads like a port that does not compile. It is one gitignored file: `port/.godot/global_script_class_cache.cfg`, which Godot writes at import time and which `class_name` resolution needs. After `--headless --path port --import`: zero errors, `main_menu` loads 16 elements and settles at t=56. The exporter shells out to ffmpeg and ffprobe for the movies AND the audio, and `sylph-ci:local` has neither -- so the documented `cargo run` fails minutes in, after the screens are already written and it looks like it is working. The image to use is `sylph-ci:ffmpeg`. Neither bites in the agent container: its image carries an imported tree and its own ffmpeg. That is exactly why neither was ever written down. Also recorded: `--headless` CANNOT `--capture` (the dummy renderer never emits `frame_post_draw`; the port detects this and says so), and `xvfb-run`, which its message suggests, is not installed on every host -- it is not on this one. Measured 2026-09-26 on fabi-Hyrican-PC: 31 s build, 4 min 11 s export, 149 MB, `sylpheed-export check` validates all 16 screens against sylpheed.screen/3. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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
-- and RUNNING.md, which is how you actually start it
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.