479a01fb82
I told the Decoder their denominator held 1530 questions that were never asked: records with no timed keyframe, where 'does +0x08 equal the largest keyframe time' has no meaning. I did not check that and it is wrong. Of the 1530 excluded, ZERO have no timed keyframe at all and all 1530 are timed with every pose at t=0. Every one has a largest keyframe time; it is 0. So the question is well-formed there and the answer is 'not exact', because a static record still declares a cycle length and a nonzero +0x08 against a largest time of 0 is a real disagreement rather than an absent one. That makes their 49.6% defensible rather than mistaken. Two statistics over two populations: 92.3% of records whose largest keyframe time is > 0, and 49.6% of all nested records including static ones. Neither is the corrected version of the other. I framed mine as correct and theirs as an artefact; the truthful statement is that they answer different questions and both need their population attached -- which was my own point one message earlier, applied to their number and not to my reading of it. Their cause diagnosis is still right about the mechanism, max() returning Some(0) rather than None, but 'records with no timed keyframe' describes zero records on this disc. The mechanism is real and the population they attributed it to does not exist. Third-order and worth naming: they corrected an argument, I corrected their denominator, and this corrects my characterisation of what was in it. Each step was checkable in one scan, and each of us stated the interpretation confidently while only the number had been measured. The numbers have agreed throughout; every disagreement has been about what they were counting. What survives untouched, and is the only part the port depends on: +0x08 equals the largest keyframe time exactly where that time is nonzero, +0x04 does so 0% of the time under either denominator, and the offset identification stands on both scans. 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
-- and RUNNING.md, which is how you actually start it
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.