sylph-decoder 4c7898ef4a re: count the voice-region population properly -- 25 three-chunk, and 17 of them were broken
Pays the debt from the truncated audit. The census prints population, coverage
and skips in the same output, and ends with an explicit END line, so a cut-short
run cannot be read as a complete one.

  POPULATION 104 movies; COVERAGE 95 resolved, 9 unresolved, 0 unreadable
  70 one-chunk regions, 25 three-chunk regions

The port's 25 was right; my '8 of 10' was not a count.

Cross-referenced against the fix's own sweep, which also ran to completion
(78 + 17 + 9 = 104): all 17 changed regions are three-chunk, none is one-chunk,
and 8 three-chunk regions were never affected -- which the 1.5 MB cap predicts,
since a region only trips the filter if its span exceeds it.

So 'the defect is specific to the multichannel regions' survives with complete
populations on both sides, while 'all three-chunk regions were broken' does not.
The original 8-of-10 was wrong in its denominator and coincidentally shares a
digit with the 8 that are unaffected, which is the kind of resemblance that
carries a dead number into a later document.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
2026-08-30 09:46:08 +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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