6e3347a338
Measured by the Decoder today: (B) from the menu to the title and (A) back returns to the item you left, not to a default; their control passed first, two delivery-confirmed DOWNs moving the cursor exactly two items before the round trip. The port reset to initial_focus on every entry, so a player who moved to EXTRAS, pressed (B) then (A) landed back on NEW GAME. MenuFlow.enter() now consults opening_focus(), and a new set_focus() writes the memory. set_focus() exists because two call sites set focus -- a cursor move and (B)'s restore -- and a memory updated at only one of them is right until the player uses the other. focus_persists is true on main_menu and nowhere else, and the scope is the authored part. wrap generalised because it was measured on two screens; this was measured on one. Here that is stronger than a preference: extras opens on MISSION SELECT as a MEASURED initial focus, so a menu-wide memory would have silently replaced a measured value with a derived one. Both halves are in one artifact, because a one-sided test passes a port that quietly generalised: the menu returns to ptbtn05 after the round trip, and extras opens on ptbtn11 both times despite being left on ptbtn12. contract-check asserts the pair -- on where measured, off elsewhere -- and fails its known negative. Eleven checks. Not assumed: whether the memory survives a reboot, or whether any other screen has it. Their reach is one boot, one round trip, one direction. The finding also reframes this morning's initial-focus warning without settling it -- if focus persists, a reading not taken on a fresh boot's first entry is measuring history. NEW GAME stays authored, on its own reasoning. 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.