b37ad246ff
MODDING.md calls base-and-overrides "a design constraint on the exporter today, not a milestone to add later". Nothing read `data/mods/` at all -- the directory has existed since the monorepo merge with a .gitkeep and no code path anywhere. Eight milestones shipped past it. ExportTree.resolve() now shadows by path, and every read goes through it: screens, sprites, cues, the music bed, movies. MenuAudio was reading tree.root directly and would otherwise have made audio the one asset kind a mod could not touch, for no reason a modder could have guessed. No manifest, no registration step -- the path IS the registration, which is the whole of the rule. One tree, not a stack: layering needs a load order and nobody has asked for one, so data/mods/README.md says that rather than inventing it. Every shadowed file is printed as it is read. The first version summarised in _ready, before any asset had been read, so it always said "nothing shadowed yet" -- a report structurally incapable of reporting anything, which is worse than none because it looks like an answer. data/mods/ was NOT gitignored, and that is a hole in a hard rule: a mod is usually an edited game asset, and this was the one directory a user is invited to put modified sprites in and git would have taken them. Now excluded except the README. Gate: a synthetic 203x43 magenta PNG (nothing disc-derived) at data/mods/sprites/title/main_menu/ptbtn01.png changes 8501 pixels in a bounding box of exactly 203x43 at the button's position, and `check` still passes. RAISED, NOT RESOLVED: MODDING.md says the tree is data/base/, PORT-MISSION.md §3 and the exporter and .gitignore say export/. Both are mission files and only the human changes a mission. REFUTATION on Q3's paint-order key: 2 of 16 screens did not match a stable sort by layer key -- but that was my test. pgloading_eff00.prm carries NO layer key (layer_source "none"): a primitive with no sprite header and no implied-name fallback. I sorted keyless first; the decoders put it last, which is right, since it is the full-screen black quad and HANDOFF's own sentence is that the fade quad paints last. Completing the rule to "keyless last" gives 16 of 16. SURVIVES. Recorded because the published claim does not say where a keyless element goes and there is one in the archive. Separately the tie-break's reach looks understated: 105 elements share a layer key across 12 of 16 screens, where HANDOFF characterises the cost as "one element's blend on one screen". WITHDRAWN, and it was mine: I filed "the runtime mix has no headroom" in red twice, off a peak reading. Measured properly it is 43 samples at full scale in 5.9 s and 24 in 98.5 s, longest run 0.25 ms -- the disc's own confirm cue on a transient, possibly only in the 16-bit save. Nothing changed, deliberately: attenuating would be an unmeasured level decision of the kind I refused for the loop point. A peak reading is not a clipping measurement. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WM5XL4HfrHuxz8RiMWdCMC
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.