b3da5c1d48
The pair I shipped this iteration -- focus_persists on for main_menu, off everywhere else -- reported both halves as agreement with the contract. Nothing measured that extras does not persist. The corpus has EXTRAS' opening item from one entry and (B) restoring the PARENT's focus 4/4; neither says what a submenu's own cursor does on re-entry. Caught by the Decoder. It is the mirror of the trap it was written to avoid. I refused to let a derived menu-wide rule overwrite a measured value, then let 'not measured here' become a positive assertion of the negative. Both treat a gap in the corpus as if it carried information and differ only in which direction they fill it. And the failure mode was the bad one: if the game does persist EXTRAS, the check holds the port to the wrong behaviour and passes while doing it. check_focus_persists now asserts only the measured half. The scope became a separate guard with its own outcome word -- 'only main_menu, AUTHORED DEFAULT, unmeasured elsewhere' -- which still fails if widened, since that should be a deliberate edit, but can no longer be read as the game being known to reset. focus_persists_why records the correction rather than being rewritten. It also weakens a label. EXTRAS' initial_focus is marked measured and was taken on a single entry; now that the main menu is known to remember its cursor, a one-entry reading of any screen may be measuring history rather than what the screen opens on -- the same objection that reframed the TUTORIAL/NEW GAME disagreement. The observation stands, its reading as an initial focus does not. Caveat attached, kind left as measured with a note that it changes if EXTRAS turns out to persist. Not building on the non-persistence half until their EXTRAS re-entry run returns. 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.