bd1415b29d
ScreenView.exit_ramp_units defaulted to 24.0 -- the constant HANDOFF ask 2 told this port to author and that it refused, since the file's own ramp is 10 units. The authored entry was deleted as progress when the corrected record layout removed the unknown, and the default plus boot.gd's timing.get(..., 24.0) made that deletion a no-op. Both use sites are unreachable on today's export (866 keyframes, 0 untimed), so the branch is kept for an older export but no longer invents: the default is -1.0 meaning not supplied, and an untimed group now raises an error naming the screen rather than fabricating a duration. My first verification accused the change: main_menu 641941 px and extras 226009 px changed, on a branch that cannot execute and with no error raised. The cause was --screen=X --capture= firing at an uncontrolled instant -- t=9.00 in the earlier run against t=8.00 in the later one, one unit apart mid-build-in. Three runs now are byte-identical, so it is not noise; the instant is stable within a session and moves between them. Re-run with --time=1.0 pinned, old against new is byte-identical on all four screens. Records the harness limitation: --screen=X --capture= cannot be used for before/after comparison on an unsettled screen, which also explains the earlier settle-vs-rest confound. Also corrects my overstatement that other tools call the CLI -- verify-screen is the only one, checked. 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.