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They challenged the compactness precondition and my claim that the leaf free-runs in the game. The precondition is wrong and withdrawn -- the same sweep crosses their box and two renders one plateau-phase apart differ by 11.9 inside it, so their crop excluded nothing. Their hypothesis that the game may not draw these leaves makes a testable prediction: the best-matching phase should be wherever the quad is off-frame. The x track is (0,-639) (150,-39) (540,1521) (600,1521), so a ~400 px quad is off-screen at t=0 and t=600 and on-screen from ~120 to ~480. On main_menu the two RMSE minima are exactly the two off-screen phases, and every on-screen phase is worse -- their prediction landing precisely. On title the minimum is at 240, on-screen, with both off-screen phases worse -- the opposite, fitting the sweep being present in that capture, which ORACLE-CAPTURES.md already says of these elements. So 'the leaf free-runs in the game too' is withdrawn as established: my two minima came from two different screens. What the off-screen coincidence shows is narrower -- the menu capture behaves as though the sweep is absent, the title capture as though it is present. It does not resolve their JP tension either. The settling test is theirs (draw-stream check on a settled title). The contribution here is that the question has a per-screen answer to look for, and main_menu is where the absent evidence is strongest. 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.