7f37b4ef03
docs/re/structures/title-residual-tone-vs-geometry.md validates its per-level-LUT instrument with a positive control on the main menu, on the grounds that "the port measures only 0.06 % of pixels differing, so geometry is essentially right". That 0.06 % is verify-capture's, and it counts pixels differing by more than ~64 levels -- a gross-displacement detector. It is blind to sub-pixel offsets and antialiasing differences, which are exactly what a per-level LUT also cannot close. Measured: after the LUT, the menu's remaining residual is 6.94 on edge pixels and 2.20 on flat ones, 3.2x. Known negative -- render vs itself under a pure gamma -- leaves 0.00, exactly, because a per-level LUT inverts a per-level effect perfectly. So the concentration is spatial and the menu is not a geometry-free control. Their conclusion survives: the title's 32 % never depended on the control. The refutation is of the validation only, and I say so. The half that is mine: verify-capture's header now states what the diff column thresholds and what it therefore cannot establish, next to the number itself. Not settled: whether the menu's spatial error is misregistration, antialiasing, or a misplaced soft element. This does not separate them.
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.