12627f9f8f
Two sections, the retraction first. The clock is time-integrated, not frame-counted, so 'units = 2 x frames' -- which I sent them two hours ago -- computes an emulator artefact. Told them what still stands from that message (the T-vs-step arithmetic and the t~160 anchor, both ratios inside one run) and what does not. Also told them explicitly to KEEP 60 units/s and act on nothing today: my own measured 29.9 rests on a T whose usual derivation is circular with the thing just retired, and a failed prediction is not a licence to move their constant. Their H4, the blend space: the game blends in the ENCODED space. RB_COLOR_INFO.color_format is k_8_8_8_8 on 2402/2402 splash draws and 33779/33791 of the boot-to-title capture; k_8_8_8_8_GAMMA appears zero times and color_exp_bias is 0 everywhere. Mechanism from Canary's own source: k_8_8_8_8_GAMMA is the only colour format around which a PWL gamma<->linear conversion is applied. So a renderer that linearises and re-encodes is doing a different operation, and the difference is gamma-shaped and zero on unblended pixels -- their reported signature.
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.