Design for making call-script actually execute (load target .BIN by id,
run nested sharing globals, return to caller). Scope: subroutine
execution only. Drops vm0.py from oracle duty; C# owns golden traces.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Native-RE (Ghidra) cracked call-script <id> (opcode 0x03): its handler
FUN_0041bc90 -> loader FUN_0040e980 -> resolver FUN_0044f390 indexes an
80-byte record table at base + id*0x50 == the SYS4INI record layout. So
`call-script <id>` is a direct RAW index into the SYS4INI global file
table (the asset index we already parse) -- there is no separate on-disk
id->code registry. This resolves name-resolution.md #1, statically, no
Frida.
Confirmed: all 297 distinct corpus call-script ids resolve to a .BIN
script with a semantically-exact name (0x1ab->ADDITEM, 0x2ae7->MES,
0x143->BUNKI, 0x329d->CALCREVISE), 0 out-of-range, 0 alternate-pack.
Companion op 0x8f `call` is an intra-script JSR (FUN_0041fba0), not
cross-script.
- parse_sys4ini.py: preserve `raw_index` per entry (= the engine file id;
index the RAW records incl. '@' placeholders) + emit
build/callscript-names.json (id->name).
- sys4load.py: annotate `call-script 0x1ab =ADDITEM.BIN`.
- opcodes.toml 0x03/0x8f refined (source=investigation, confidence high,
handler VAs) + rebuilt opcode-reference.md.
- docs: engine-re.md (op 0x03 section + backlog re-aimed),
name-resolution.md #1 (SOLVED), script-inventory.md (call graph +
living-reference decision), tools-reference.md.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
op 0x1a2 resolve-handle? -> gfx-cmd-register (verified handler FUN_0042d360, gfx
command-buffer op). name-resolution: decision->scene hop is native+unidentified, not
u00428010 (disproven). Regenerated opcode-reference + shim.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Anchored the opcode dispatch table: handler(op)=ctx[0x26c93+op] (default FUN_004162b0,
registered by FUN_00413860). Corrects the prior note: raw Kelebek VA 0x428010 is op
0x1ac (a save op, 0x427fb0); op 0x1a2's REAL handler is FUN_0042d360 = a graphics
command-buffer op (cmd-type 3, '%c%8.8x' key). So u00428010 is NOT decision->scene and
NOT save; the FIELD 0x5f0ed/0x62ccf snippet is gfx/UI. decision->scene premise discredited;
real mechanism = call-script/script-load (still unidentified). Lesson: resolve handlers
via the table, never the raw Kelebek VA.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Ghidra+MCP workflow validated. Found the opcode->handler dispatch table
(*(ctx+0x9b8f4+op*4), registered by FUN_00413860) — the general fix for Kelebek VA
drift. Corrected: u00428010 (op 0x1a2) is a save/resource op, NOT decision->scene;
the SCJUMP consumer persists the visited-decision flag. New doc docs/engine-re.md.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Stand up bethington/ghidra-mcp loop; prove it by reversing SCJUMP's native
decision->scene resolver. Raw-dump-first, pe-sieve fallback; findings -> docs/engine-re.md.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Guarded-DFS decode of SCJUMP's DAG into (chapter, guards)->decision table;
VM witness cross-check; native decision->scene boundary documented/deferred.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
build/globals.json is generated (build/ is gitignored, regenerable via
globals_build.py --build); docs/global-reference.md is the tracked human view.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Curated single-source global registry modeled on opcodes.toml; static
story-flag discovery miner; sys4load labels from merged build/globals.json.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
godot -- --seed 0xa57=1 seeds initial global state in the ADV frontend (e.g.
Lily's form-gated voiced dialogue plays live; forms A/B/C = 0xa57/0xa58/0xa59).
Additive: no seed = unchanged, selftest OK. Also documents the engine CLI
(run/trace/audio/gfx/play/sweep) + Godot frontend flags in tools-reference.md
(they lived only in memory/commits).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
tools-reference: dump_engine/probe_handlers/capture_gfx_objects + SYS4AB note.
phase-a-slice-plan: post-opening drift RESOLVED as a state-divergence artifact
(fix = Phase B state flow, not a native-op subsystem). PROJECT-STRUCTURE:
build/{textures,engine-dump}, engine/, tools/frida/.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Decrypted SYS4AB: 0x2c header (S4AB magic + 0x10E000 size + 8-byte key) then
XOR-0xFF payload == AGE.EXE byte-for-byte. Not a patched/unpacked VM. Real
handler code exists only unpacked in the runtime heap (0x62411000). Corrects the
'likely the patched VM' assumption.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Investigation upgrade: 0x215 queries the native object manager by element
handle-id (0x62455[idx]) and returns the object's slot/status; sign-tested to
drive label_12649's slot-select. Stubbing it collapses all draws onto slot 0 →
the anchor-preserve geometry reads foreign textures → cumulative bg/sprite
drift. Keystone for the graphics object-manager; exact return via unicorn
(handler @0x421160).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Promote 0x208 from stub to a real VM op that writes the loaded texture's
width/height into its two output globals, via new IHost.GetTextureSize. This is
the single native primitive the CG-load subroutine (SC0000 label_12649) needs;
all downstream centering/anchor geometry is already computed in bytecode.
Non-Godot hosts return (0,0) so trace/selftest parity holds (engine 9/9 incl.
TraceDiffTests). Godot host gets a temporary (0,0) stub; real impl in the
compositor task.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Recon of SC0000 label_12649 shows sprite/background geometry is computed in
bytecode; the only missing native primitive is 0x208 get-texture-size. Spec:
implement 0x208 (host returns real image dims) + a faithful 800x600 blit
compositor; defer fades/chromakey/multi-surface. Headless `gfx` diagnostic as
numeric oracle; --selftest/trace parity preserved.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Wire audio end-to-end (OGG plays natively in Godot; no Frida, no decode):
- IHost.PlayBgm/PlayVoice + VM dispatch for play-bgm(0xbf)/play-voice(0xc4).
Non-Godot hosts no-op them so --selftest + engine 8/8 stay byte-identical.
- GodotAdvHost resolves id->OGG; Main plays via two AudioStreamPlayer nodes
(BGM looping; voice interrupt-on-new).
Key finding (by-ear, systematic-debugging): the two audio ops use DIFFERENT
addressing — the earlier "unified manifest" assumption was wrong for BGM.
- play-voice -> per-scene manifest files[base+id] (offset 0, same as textures).
Confirmed by ear; upgraded med->HIGH.
- play-bgm -> DIRECT LITERAL NAME BGM{id:03d}.OGG, NOT the manifest.
Real game: play-bgm 5->BGM005, 8->BGM008 (manifest gave +1). Proven by
play-bgm 0x23->BGM035 (real standalone track; BGM set skips 030-034) that the
manifest mis-resolved to a graphics entry. Fix is BGM-only:
ResourceMap.BgmPathById; voices/textures unchanged.
Also: Lily's silence root-caused as correct form-gating (G[0xa57/0xa58/0xa59]),
left unseeded by choice (no dummy state). Added diagnostic
`Age.Cli audio <SCENE.BIN> [0xADDR=VAL ...]`. Corrected opcodes.toml (play-bgm
direct-name, play-voice HIGH) + docs/memory (dropped the bogus unified-manifest
/ Frida-BGM006 claims).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Reverse-engineering + open reimplementation workspace for Eushully's AGE/SYS4
engine (first target: Himegari). The repo root is age-reimpl/; the original game
install and the extracted ALF data are siblings outside the repo and are never
tracked. build/ (derived corpora) is gitignored and regenerated by the tools.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
