1ad519d3ba
A human played the port on real hardware for the first time (2026-09-01) and
found four things. Two were port defects, fixed. Two are open and are now both
agents' focus: the PRESS (A) plate arrives late, and the splash fade/blur is
weaker than the game's.
Their verdict on method is the reason this is a brief change and not a ticket:
"the agents were essentially guessing and trying to copy what one would see,
but while they did get close it still is not quite right"
Close-but-not-right is the signature of reproducing APPEARANCE instead of
deriving MECHANISM. So the Decoder's focus block asks, in order: is there a
post-process pass at all, what is it, where do its parameters come from -- and
only then what curve. Both routes, dynamic (GPU state, shader constants, render
targets; add logging to Canary, it is theirs read-write) and static (.pe, the
DB, the paks), with each fact labelled by which produced it.
TEMPORAL-VERIFICATION.md is the other half, and it generalises past the
splashes. We have been photographing the game at time t, and t is never the
same twice: emulator speed varies with host load, Canary presents at ~28.1 fps,
the capture path costs a variable 0.1-10.8 s, and a long-lived x11grab stream
degrades and then freezes. The register already carries FOUR refutations of
exactly this shape. The replacement rule: record a film, not a photograph;
align by CONTENT, not by clock, and report the lag as a measurement rather than
minimising it away; prefer ordering, counts, durations and shape over any value
at a wall-clock instant; anchor on an event; report achieved fps against
requested fps.
Also into both briefs: the input set. The port had no joypad binding for (A) or
(B) and nobody noticed for a whole milestone, because --script sends
InputEventAction, which BYPASSES the input map -- so every check asserted the
code below the map and nothing about the map. The Decoder is asked to DECODE
the full set the game reads rather than discover it by pressing buttons; the
Port is told input is verified at the device level or not at all.
And both briefs now point at the R1 register reclassification, because two of
the ten re-opened entries land on this focus: "the declared keyframe timeline
reproduces the captured splash" is 🟡 our-reader, and the rest() pair is open
in BOTH directions -- while the two splashes are the only screens that reach
that fallback.
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.