MechaCat02 8fe9ee2678 merge P0: the exporter, FORMAT v2, and the container script fixes
The port agent's first published arc. Merged from auto/p0-exporter so the image
build below carries its docker/bin fixes -- build-export follows the exporter's
new subcommand shape, and build-reference-cli makes the pinned reference CLI
reproducible rather than a hand-built artifact in a volume.
2026-08-28 21:05:56 +02:00

Sylpheed Godot

A clean-room Godot 4 port of Project Sylpheed: Arc of Deception, starting with the menu shell: developer splash → intro video → title → main menu → submenus.

You need your own copy of the game. Nothing in this repository is game content. An offline exporter reads the disc you supply and writes an open, moddable asset tree; the Godot project reads only that tree and never touches a disc format.

  your disc  ──▶  crates/sylpheed-export  ──▶  export/   ──▶  port/  (Godot 4)
                  (Rust; decoders come from      JSON + PNG        reads ONLY
                   sylpheed-formats)             + OGG + OGV       open formats

Why the wall

Two reasons, and the second is the interesting one:

  1. Godot cannot read IPFB archives, RATC bundles, T8aD textures, XMA banks or WMV video, and it should not learn to.
  2. Modding is a goal of this port. If the runtime reads the original formats, modding means reverse engineering. If it reads JSON and PNG, modding means opening a file.

Where the knowledge comes from

The decoders live in sylpheed-formats, pinned by revision — a separate project, where the reverse engineering happens. Its docs/port/HANDOFF.md is the contract: what has been decoded, what was measured off the running game, and what is known to be undecodable. Read it before assuming a value is on the disc.

Layout

crates/sylpheed-export/ disc → open formats. Regenerates export/ wholesale
port/ the Godot 4 project
authored/ decisions that are not on the disc, each with its reason
export/ generated, gitignored, never hand-edited
docs/ the mission, the format spec, the agent's loop prompt

Status

Pre-P0. Nothing runs yet.

Description
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Readme MIT 820 MiB
Languages
Rust 57.6%
Python 27.7%
Shell 10.6%
GDScript 3.5%
Dockerfile 0.4%
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