ecd5e56e0c
The suite reported '2 DIFFERS, allowed: the pin is not on main, so this compares two decoder eras', and I had quoted that for several iterations without testing it. Built sylpheed-cli at formats-pin-2026-08-30 and at workspace HEAD and rendered through both: title, title_jp and main_menu come out 0 pixels different, despite 508 lines of difference in ui_layout.rs. The eras are not the cause, and the allowance was excusing a real signal with a wrong explanation. A second defect in the same eight lines: the expiry tested formats-pin-2026-08-29d while Cargo.toml pins formats-pin-2026-08-30, so it would have expired on a tag this tree does not use. The real reasons are per-screen and already documented: title is the ptloop sweep phase residual, title_jp is the --pose=rest sparkle handling -- where the port's shipped pose scores +0.9994 against the game to the reference's +0.8727, so the port is closer to the game on the row the script calls a disagreement. Replaced with a named set: title and title_jp by name, any other DIFFERS fails. A count cannot notice a different screen drifting while the total stays at two. Controlled both directions -- passes on the known pair, fails on main_menu or extras. The pin reminder now reads the tag out of Cargo.toml so it cannot drift. 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.