Drew T
fda9eebb42
Completes T4 and corrects two defects I introduced, both landed in commit:0649. - WIRED: 006 1543/1614 · 007 1544/1615 · 010 1544/1614 · 011 1543/1614 = 6174/6457 = 95.6%, ~0 agent tokens. Stubs/overlay ~2400 -> 831/984/898/825. Fleet instr 67.0 -> 68.9%, fn-count 82.16 -> 83.94%. dedup-check 1840 validated / 0 failed; groups now read "138 members [138 binaries]" (was 134); C1 coverage 227211 -> 233385 = exactly +6174. R22 make clean && extract-all && check-all -> 140 passed, 0 failed of 140 at every stage. - FIX #1 — I DESTROYED THE REGISTRY'S DOCUMENTATION, AND EVERY GATE CALLED IT GREEN (H5). The first cut wrote config/dedup.us.yaml with yaml.safe_dump, round-tripping the whole file: 47 comment lines -> 0 (including the curated Phase-11 header explaining WHY the share is source-level) and 1832 `vram: 0x80162FF4` -> `vram: 2148937716` (PyYAML parses YAML-1.1 hex to int; dumps int as decimal). 25,948 lines rewritten. It passed dedup-check 1840/0 AND check-all 140/140 because _addr() accepts both forms: THE DATA WAS CORRECT AND THE DOCUMENT WAS RUINED. Fixed forward (R6, no history rewrite): restored from commit:0649~1 and re-applied the 6174 memberships via a surgical text edit (add_members_surgical). Verified: 1545 insertions / 1545 deletions, 0 non-`binaries:` lines changed, 47 comments + 1908 hex fields intact, and the rebuilt fleet is byte-identical to the destructive version (140/140). THE LESSON: every oracle this project owns measures BYTES, so a formatting-destructive write is invisible to all of them by construction. R34 says the byte-gate is a null COVERAGE oracle; this is the same hole one layer out — it is a null DOCUMENT oracle too. - FIX #2 — I MIS-REPORTED THE DIFFs, TWICE (R14). (a) commit:0649 claims ov_SC07_006's 71 non-banks were "ALL PLUMBING, ZERO DIFF". FALSE — I read head -6 of the classified file and generalized. It has the same 4 DIFFs as the others. (b) I then built the jr guard assuming those 4 were the §53 jr class BECAUSE ov_SC01_077 hosts them in _jr_8017A4AC.c / _jr_80182268.c. has_mid_jr is FALSE for all four (33-52 ins, no jump table): they merely live in a carved jr-REGION split, which sweeps in every function in its address range. HOSTING FILE != FUNCTION CLASS. The guard is KEPT (preventive, §53-correct, currently skips 0 — no jr fn is in the extendable set) with its docstring corrected to record what it is NOT. The 12 DIFFs (0.19%) are UNDIAGNOSED and logged, correctly left as stubs by the gate — not dressed in a story. - The 283 non-banks: 271 PLUMBING (the loose-typing conflict class + the whale, whose body lives in src/shared/func_80144B9C.h so no DEFINE macro exists to expand) + 12 DIFF. Existing tools cover the plumbing (cast_call_sites / canon_sig_reconcile / reconcile_tu).
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.