sylph-decoder 8dfa0ebac5 re: the A-press dialog is the SIGN-IN dialog -- and the corpus already knew
Answers the open half of the A-press diagnosis, and most of the answer was
already in the tree.

The faulting runs booted with logged_profile_slot_0_xuid = "" -- their own
config dump -- while a profile existed (Found 1 Profiles). With nobody signed
in, A takes the state-0 branch of sub_821D03A0 and calls XamShowSigninUI(1,1);
Canary raises its Sign In dialog with a no-op close handler and nothing in an
unattended run dismisses it. 85 instructions verified against the image, 0
mismatches; the state-3 branch is XamShowDeviceSelectorUI, already ruled out by
storage_selection_dialog = false.

The correlation runs through the tooling: boot_menu.sh passes the profile flag
and Q4/Q5 pressed all five buttons; frame_clock.sh, which produced the faulting
run, does not.

So there is no blocker -- boot with boot_menu.sh. Flagged as retrodicted rather
than A/B tested, since I have not myself booted both ways and pressed A.

The uncomfortable half: canary-scripted-input-traps.md section 3 already named
the sign-in dialog WITH a committed capture, and boot_menu.sh's header already
carried the mechanism and the 8.4 million figure. The fault page searched for
the cause it had hypothesised and never searched for its own symptom. Added to
METHOD.md, along with the more expensive lesson -- a measurement whose only
record is a script comment is invisible to the document that needs it.

What this session did add is the join: that the known blackout is what drives an
unbounded guest queue into a failed 128 MB allocation.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
2026-08-30 07:21:18 +00:00

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-cli and 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

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.

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