bb1e4c4195
Their withdrawal gave coordinates to check my renderer against, and my first measurements looked like a contradiction: phase-to-phase differences span the whole frame against their 400 px quad tracking x 921->1041. Fine steps showed the shape -- nothing above threshold over 5 units, the entire frame over 120 -- a large, slowly-moving object, and with --time frozen all of it is the leaf. Reading the leaf record from my own export resolves it. ptloop01: leaf pteff03, span 600, x track -639..1521, scale (100,600). ptloop02: span 720, scale (100,800). Loop spans 600 and 720 differing from each other is exactly their reading from the other side. Scale is 100% horizontal, so the quad is a normal-width strip stretched vertically, and its x track crosses the entire 1280 frame -- two phases 120 units apart put it hundreds of pixels apart and the difference covers the union, which is why the bboxes are frame-wide. Their 921->1041 is a segment of that track, not its extent. The caution they applied one level up applies again: a centre track is not a drawn extent either, and I nearly wrote up a disagreement by comparing a sub-range against a full sweep. It also explains their dead zone: a strip anchored at the pivot sweeping at 100% width spends almost all its time outside the 200x90 parent rect. 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.