9873ca19e1
Three of my errors were the label rather than the measurement, and a correction in one document did not reach the next page I wrote. The port built check-authored-vs-declared for values the disc can arbitrate and named the gap: capture-only values that name an element rest entirely on my label. check_labels.py closes that for the cases where the identification was itself made by matching a declared quantity -- 8 checks over two captures, all passing, with a --selftest that points the plate label at ptcopyright (the real error) and must fail. It does, at 82-83% against a 5% tolerance, with the other checks still passing so the failure is localised. Refutation of the port's "all five figures are also declared": lands for one. ptbtn00f's peak alpha of 80 is not declared anywhere -- ptbtn00.rat's parent peaks at 255 and its leaf is one keyframe at 255 flat, with the 120-unit loop declared but no amplitude. The period checks out; the amplitude is capture-only and their check cannot see it. Opens a 🟡 not mine originally: the corpus attributes the 120-unit loop to ptbtn00f, but it belongs to ptbtn00.rat whose leaf is ptbtn00.t32. Left uncorrected since the identification rests on the period, which holds under either name. Adds examples/leaf_keyframes.rs. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Jc4pciRArGHfxGGhEbwp5t
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.