a04d8a6740
The Decoder's point was that this is an unenumerated set, not a missing guard. The enumeration is possible on my side and found a THIRD clock: the leaf sets holding = false explicitly and reads time_units, pinned only by --leaf-time or --time, biting on loop_leaf_on_screens = [title]. I would not have found it by waiting for a row to drift. But the general answer is a test that fails when the set is non-empty. Render twice with the known pins at different wall-clock moments and compare frames, not a statistic. --screen + --time + --loop-phase: all 16 byte-identical, though --time freezes time_units itself so that pins every derived clock. --menu --script=wait + --loop-phase, where the drift lived: frames differ by 4378 px -- but max per-channel 2.86 against 158.4 for a genuinely moving element, 55x apart. Nothing moves; the residual is rasterisation noise. The discriminating scale is what makes the test an answer. And the reason I nearly missed it: last iteration I reported three pinned runs returning 13.26 and called the harness reproducible. verify-capture prints RMSE to two decimals and the residual is 0.0565 -- below its own resolution. The frames were never identical; the statistic could not tell. I verified reproducibility with an instrument that rounds away the thing being verified. Conclusion unchanged: 2.86/255 changes no result. 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.