ad72a2e2bb
They challenged the dwell agreement: declared spans 240 u and 195 u at 60 u/s give 4.000 and 3.250 s against six cold boots whose ratios all exceed 1, mean 1.085, implying 54-56 units/s. And that 240 units at 60 should give 4.000 where I report 4.28. The port does not play 240 units. Their 240 is the visible span, the logo element's 15->255. The port plays the whole group from t=0, and my export gives the full spans as 255 and 210 units -- 4.250 and 3.500 s. My 4.28 and 3.58 are those plus transition overhead. Recomputed against what the port plays, the ratios become 1.011, 1.083, 1.028, 1.002, 1.001, 0.962 -- mean 1.0145 with one of six below unity, against their mean 1.085 with none below. The systematic largely dissolves. Their practical consequence does not follow either: the gap is 0.174 s, not 0.42, and on developer_logos the port runs 0.041 s LONGER than the oracle mean, the opposite sign. Fourth instance of the same family after pivot-as-extent, centre-track-as-bbox and cycle-length-as-motion-duration: a visible span read as a played span -- and the first where the misread number was mine to supply and I had never stated which span the port plays. What survives: publisher still runs long in two of three boots against the full group. Much weaker than 8.5%, thin at three boots, and no support for changing keyframe_units_per_second. 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.