6072d216a8
The port agent could not reproduce this page's 159/714/1520 from the capture it holds: counting green>150..200 over a plate box it got 3-5x at every threshold. The page named neither the region nor the predicate. Stated now: the whole 1280x720 frame, and is_title.py's three-channel predicate (g>130 & g-r>45 & g-b>45), which is why it counts far fewer pixels than a bare green>N. That reproduces 1520/714/159 exactly. Writing the method down exposed a defect the prose had hidden. The 159 floor came from live-title-build4-no-plate.png at 1279x675 -- the game surface -- while the pulse frames are 1280x720, the whole display. Different crops, silently compared. Replaced with a same-run, same-geometry floor that was in the series all along: 154, flat for ~2 s immediately before the plate ramps in. So 'it never goes off' now rests on one run in one geometry, at 714 against 154, which is where it should have rested from the start. The port's independent ratio of 1:10.4-10.9 brackets this page's 1:9.6 and is the part robust to how anyone counts. Two METHOD entries: a pixel figure needs its region and its predicate, and a comparison between two counts needs them to share a geometry; and the port's observation that a fix which overshoots leaves no symptom until a third change needs the part it disabled. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
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.