41f13318f4
The Decoder decoded bit 0 of kind as the PARENT FLAG, disc-wide: kind & 1 agrees
with 'has a parent' on 15493 elements, zero disagreements. So 0x3003 is 0x3002
parented, and carries no role information -- the OPTIONS rows were never a
different class, they just have a parent.
Detector now matches 0x3002 | 0x3003 as TWO LISTED VALUES, not a mask.
kind & 0xFFFE == 0x3002 would also match 0x73002/0x73003 -- 160 elements whose
0x70000 bits are undecoded -- silently, on screens neither agent has looked at.
Excluded by construction until somebody decides deliberately.
Impact measured BEFORE re-exporting: exactly two screens gain buttons, options
and options_jp, five rows each. No existing screen changes.
Verified: main_menu -> down x3 -> (A) -> OPTIONS, then down x2 moves
po_menu_btn2 -> po_menu_btn3, focus ring rendering on the highlighted row.
📌 Waiting was right. The rule I rejected -- 'carries a focus record therefore is
a menu item' -- would have reached this answer by a second inference from
structure and reclassified elements on unseen screens. The field cost one
question and needed no inference.
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.