Drew T
74d7f93c8a
First Ultracode wave against the population the -O0 routing made draftable. 30 agents (15 drafters + 15 adversarial verifiers), 1.33M tokens, 8.8 min. Every drafter self-checked with match_one --o0 AND rtu_match --o0; every MATCH claim was then re-run from scratch by an independent skeptic instructed to default to REFUTED. Result: 15/15 confirmed, 0 disputed. WHOLE-BINARY GATE (the sole arbiter, G3/P9): **12 banked / 3 failed** — a textbook SS52b outcome (an rtu MATCH is a CANDIDATE, not a bank). All three failures are NAMED INTEGRATION classes, none a compiler wall: func_8013BD74 CARVE-REFUSED — it is a jr function; needs the SS81 carve chain (reach 138) func_8013B83C CC1-FAIL — real-TU compile, error not yet read (reach 138) func_80184058 PLUMBING — recovery ladder BANKED: func_8013C08C + the 11 fourth-region fns (func_80183CF0/D50/F28, func_80184028/264/ 2E0/354/474/538, func_801847EC, func_80184868). Bank truth read from the SOURCE (INCLUDE_ASM absence), never the gate report (SS55b trap 4). R22 CLEAN-FLEET: extract-all 139/139 (+main); check-all 140 passed, 0 failed of 140. PROPAGATION OF func_8013C08C (reach 138) IS NOT DONE: the first sweep returned "0 families" because the family map still listed it as a stub — regenerated it (the documented crack-wave-sweep-map-regen path), after which the sweep found 137 candidates and banked **0/137**. Per SS94 a family 0/N is a TYPE-CARRY failure until proven otherwise, and this body carries a SS100 body-scoped typedef, so that is the first hypothesis to test. Recorded as open, NOT as a wall. FLYWHEEL FEEDBACK (R16), the honest read: the cookbook index fired on only 3/15 targets. Agents independently re-derived the SAME undocumented idiom — the -O0 CONSTANT-OFFSET FOLD (`p->f` folds to `lbu 3(r)`; `p[i]` does NOT, it emits `addiu; lw 0(r)`) — and two found their decisive levers in a SOURCE HEADER COMMENT in ov_SC01_077_o0.c rather than in the cookbook. The -O0 regime is under-documented relative to how much of the frontier now lives in -O0 TUs. SS71 also generalises to -O0: several agents cracked their target off an already-banked sibling in the same TU (func_80184868 came straight off the shape banked earlier today).
BFM-decomp
A matching decompilation of Brave Fencer Musashi (PlayStation, SLUS-00726, USA 1998) — the first public decompilation effort for this game.
What "matching" means
The goal is C source code that, compiled with the original-era toolchain (PsyQ 4.x / GCC 2.7.2-family + ASPSX via maspsx), produces a byte-for-byte identical SLUS_007.26 and, eventually, byte-identical overlay binaries. SHA1 checksums are the ground truth; "functionally equivalent" does not count.
No ROM content
This repository contains no game assets, no disassembly output, and no ROM-derived data — only source code, build configuration, symbol names/addresses, hashes, and documentation. To build or contribute you must provide your own dump of the game disc (4-track BIN/CUE, redump layout). See .gitignore for the firewall.
Project status
Latest (Phase 19, 2026-06-20): the project builds 136 binaries byte-identical from a clean tree (the EXE + the resident engine + all 134 location overlays);
make check-all→ 136/136. Fleet byte-identical-from-source is 58.0% (function-instance-weighted; see the PhaseEnds for the byte-weighted ~30% figure and what it includes). Shared engine functions are matched once inov_SC01_077and propagated ×134 viatools/dedup_propagate.py. (The narrative below is Phase-11/12-era; a full refresh is part of the public-flip prep.)
Gen1 (foundation) complete — the matching pipeline is proven end-to-end. make extract && make build && make check rebuilds SLUS_007.26 byte-for-byte identical (SHA1 143dbb89…) from C + assembly, reproducibly across many sessions.
- Compiler pinned by evidence:
gcc-2.7.2-psx -O2 -G0 -mips1 -mcpu=3000+maspsx --aspsx-version=2.56 --expand-div. - 52 functions hand-matched to byte-identical machine code — including the LZSS streaming decompressor — with a decomp-permuter + matching-cookbook "flywheel" to accelerate the next.
- 959 PsyQ SDK functions linked byte-identical (libcd, libgs, libgte, libspu/libsnd, libgpu, libc2, libmcrd, libapi/libcard, libetc) straight from the real PsyQ 4.0 libraries instead of re-decompiling them — bringing byte-identical-from-source coverage of the EXE to ~50%.
- File-loader / overlay system reverse-engineered, with the resident engine blob + location overlays' load addresses proven byte-identical against a live PCSX-Redux RAM dump.
About half the EXE is still INCLUDE_ASM stubs (correct bytes, not yet C), and the bulk of the game lives in compressed overlays inside the .CD archives — Gen2 (overlays & engine at scale) is underway:
- The build toolchain is binary-agnostic (one parameterized pipeline builds any binary), and the always-resident engine blob rebuilds byte-for-byte from source (SHA1
8e17e02f…) — the second binary reconstructed exactly, after the EXE — and is now 86% hand-matched C (123 / 146 functions, up from 0): its scripting turned out to be compiled-MIPS state/mode dispatch, not a bytecode VM, and the save-file + sound (SQV) formats are documented. The harvest used a reusable swarm-of-agents + bit-for-bit byte-gate method (a wrong match can't be accepted) —tools/harvest_verify.py+tools/match_one.py, which carry straight into the overlay phase. - A cross-binary deduplication pipeline is live: a Ghidra-free signer fingerprints all 134 location overlays, and the report finds ~9,000 byte-identical function groups shared across binaries (~28 MB of collapsible code) — a single engine function is byte-identical in all 134 overlays. This is "one match unlocks many": each engine match will be auto-credited across the overlay fleet.
Current phase and detailed progress live in phase-ends/ (newest PhaseEnd_*.md = current state); methodology, rules, and the full roadmap are in PROJECT_CONTEXT.md; environment setup in docs/SETUP.md.
This project is developed primarily by Claude Code driving Ghidra through an MCP server; see CLAUDE.md.
License
Private repository for now. AGPL-3.0 is planned at public release, modeled on sotn-decomp. tools/brave-CUE/ is CUE's BRAVE extractor (GPL, source included) and retains its own license.