73710ac2e3
The Decoder corrected their own focus delivery: the persistence run's item names were two positions out, from a reader using design-space rows against captures carrying Xenia's chrome and a 1.060 scale. Two things follow. initial_focus_kind moves from authored to measured. NEW GAME on a fresh boot, 2/2 fresh boots, both the first menu entry. The value did not change; its standing did, and the upgrade is not because the measurement agrees with me -- they had said my agreeing with their records was no evidence, which was correct, and this is a direct reading independent of the reasoning that chose NEW GAME here. "First entry" is load-bearing: since the menu remembers its cursor, a reading taken later measures history, which is the objection that voided the earlier TUTORIAL-versus-NEW-GAME disagreement. The superseded reasoning is kept under (was) lines -- the field existing and being labelled honestly is what made arriving at a measurement a label change rather than an archaeology problem, the third time that has paid off after loop_start_s and the +0x08 read. My check_focus_persists anchor survived a correction it should not have been able to detect. It anchors on the heading, the conclusion, not on the item names. That is lucky rather than designed: the conclusion is geometry-free -- ring at y 384.0 before the round trip and 385.5 after, an equality immune to a constant offset -- while the names were not. The check would not have caught the label error, and nothing in it distinguishes anchored-on-a-robust-claim from anchored-above-the- part-that-was-wrong. Their generalisation: a control that only checks differences is blind to the origin. check_splash_dwell is that shape -- it compares the widest gap between keyframe times, and a reader with every time shifted by a constant passes. Added check_splash_times, asserting the absolute list the contract prints. Origin and difference now fail independently. Writing that control reproduced the error one level down: its perturbation literal was written from memory of the prose, with a space where the document has a newline, so it reported its own anchor gone. A control written from a memory of the source rather than from the source is the class of error these checks exist to catch. Thirteen controls, all firing. Q2 closed: fixed same day, and the row was worse than I reported -- the splashes were also mis-paired as 10/11, one half each of two different pairs. EXTRAS remains unmeasured; the run meant to settle it navigated to OPTIONS believing it was EXTRAS. Every asserting check passes. 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.