sylph-decoder 9e35fc26cc re: the A-press A/B is run -- signed-in profile, no swallow, menu opens
The debt from two iterations ago. Two boots, same binary and ISO, one A tap
each, fired only after the plate's pulse had been seen for 12 consecutive
samples. ARGV recorded per leg, because the config dump provably cannot say.

  leg A  no profile flag        3811 swallow lines and climbing
  leg B  --logged_profile_...   0 swallow lines, final glyph 327 = MAIN MENU

327 is the documented main-menu glyph count, reproduced by this instrument's own
control, so leg B's press opened the menu. Capture committed.

Leg A demonstrates the SWALLOW, not the crash: I stopped it at ~2.3 M swallowed
calls because kernel tracing at log_level=3 was eating the 300 MB budget the
crash dumps need. The fault itself remains measured once, historically. One run
per leg.

A void pair came first and is recorded, because it is why the detector is what
it is. The first version fired on a single frame over a glyph threshold and hit
the INTRO MOVIE -- green flashes of 1298..5433 lasting under a second -- about
6 s before the title, in both legs. The presses were real (each skipped the rest
of the movie, which is Q9's behaviour) but the pair tested nothing. The fixed
detector requires 12 consecutive in-band samples, and was replayed against the
void runs' own series as its control: it declines the movie flash at 84.8/85.5 s
and fires at 93.9/94.7 s inside the sustained pulse.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
2026-08-30 08:05:43 +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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