7fe318356c
The Decoder established ptloop01/02 and their leaves are identical on entries 4, 5 and 7; confirmed against my export on every field. That makes replication well-posed: same object, different screen, different capture. main_menu minimises at 0 units (13.2059); title minimises at 240 (13.9417), with 0 at 14.1604. Spread 1.025 on the title, 18x the 0.0565 floor, so both sweeps are decisive and they decisively disagree. The meaning: the leaf free-runs in the game too, so each capture froze it wherever it happened to be. The phase that best matches a capture is a property of when the shutter fell, not of the game's rest state -- a continuously sweeping element has no canonical rest phase to find. My 'phase 0 is the measured best of the cycle' was measuring the capture, not the game. The hedge I attached was the right caveat for the wrong reason: I framed a well-located property of a photograph as a weakly-located property of the game. Phase 0 stays pinned as a harness convention. NOT tuning it per screen -- 0 for main_menu and 240 for title would minimise both and would be fitting each capture's shutter moment, making the harness agree with the oracle by construction. Every row with a sweeping leaf now carries an irreducible capture-phase term of up to ~1.0 RMSE, larger than most margins quoted from those rows. 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.