bc0718b18c
The Decoder read Canary's cvars (present_letterbox true, safe area 100) and drew the consequence that "everything either of us measures off a PNG carries the resample -- every RMSE against a capture, every glyph count, every surface mean, and the motion-census numbers on both sides." That is a caveat on a very large amount of shared evidence, so it was worth one measurement before anyone started qualifying results with it. Pre-registered: if the captures carry a scale, SCALING this port's 1280x720 render to 1279x675 should beat CROPPING it. If they are crops, the reverse. render cropped to 1279x675 RMSE 558.1 (0.85 %) render scaled to 1279x675 RMSE 10118.8 (15.4 %) Cropping is 18x better. A 0.9375 vertical scale would put every feature on the wrong row, and the residual under scaling is exactly what that looks like. REFUTED: the consequence. Pixel comparisons against the committed captures are like-for-like. NOT REFUTED: the cvar reading. Canary may letterbox by default; this says nothing about that. It says the capture path used for the corpus did not go through it -- presenter bypassed, window 1:1, or the tool cropped the letterbox before saving. Which, nobody has established. 📌 And a second line already agreed, one page away, unconnected: ui-render-tone-curve.md records every committed capture aligning against our render at exactly dy=0 dx=0, correlation 0.9466. A 0.9375 vertical scale cannot produce a zero-offset alignment. The evidence for "crop" was already in the corpus, next to the surface-size puzzle it explains. Unchanged and worth keeping: their gamma negative (VdGetCurrentDisplayGamma is kStub, the splash shader is four ALU ops with no pow/ramp/lookup), the vertex-stream path being the better instrument where a question can be asked of it, and motion-census never having been at risk -- a resample preserves change. Reach: one capture, one screen. Enough to refute a universal; not enough to establish that no capture anywhere carries a resample. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018AHUQvXGyNcKonSEWsgWcX
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.