Native RE of the largest remaining SC0000 rendering GAP band: resolved every
handler in 0x21c-0x243 (+0x2bd/0x2bf) via the dispatch table (ctx[0x26c93+op]
from FUN_00413860). The cluster is ONE subsystem = sprite transform + animation/
tween; two members already named (0x234 anim_start, 0x238 set_anim_clock).
Decoded representative ops 0x220/0x21e (argc6, cmd-type 0xd, transform worker
(handle,op2,op3,f4,f5,f6); 0x21e normalizes floats /_DAT_00571c28 -> scale%);
worker gfx_anim_set_channel@0x47eaa0 arms an anim channel on the same object
model GfxState tracks. anim_start+set_anim_clock => a per-frame clock that makes
AE* fades animate rather than snap.
engine-re.md: full op->handler map + contract. Ghidra annotated (renamed
gfx_op_0x220_set_transform3_abs / gfx_op_0x21e_set_transform3_norm /
gfx_anim_set_channel + plate comments, saved).
Add the approved brainstorming spec for the opening-slice implementation
(wall-clock tween, opening-driven subset, passive GfxState + compositor tween +
alpha-aware blit).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Add tools/scene_opcode_coverage.py: histograms a scene's static opcodes and
classifies each vs the C# VM as impl / safe-noop / GAP (effectful op the VM
silently stubs). Implemented set is parsed live from VirtualMachine.cs case arms
(no drift); metadata from build/opcodes.json. Makes a half-rendered scene legible
("N ops still stubbed") instead of implying everything runs.
SC0000 baseline: 129 distinct ops, ~94.8% instruction-weighted handled, 68 GAP.
The tracker cross-checks opcodes.toml vs VM behavior and surfaced 0x259
(script-entry marker) missing its noop_headless flag -> reconciled in opcodes.toml
and rebuilt (regen: age_opcodes_himegari.py, opcode-reference.md).
Docs: tools-reference.md (tool row), phase-a-slice-plan.md (completeness gauge).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
The retained-mode "2nd CG renders off-screen" bug: GfxState conflated two
distinct native structures. It assigned a fabricated AcquireSlot() slot on
every GetOrCreate (called by all geometry/draw ops) and returned it from
QuerySlot (op 0x215). But Ghidra (gfx_op_0x215_register_query @0x42a0b0 /
gfx_op_0x1a2_registry_insert @0x42d360) shows 0x215 does map.find(handle) over
a registry populated ONLY by op 0x1a2 -- it never allocates a slot.
So a CG handle (never 0x1a2-registered) read back as "existing", took the
existing branch of label_12649, ran get-texture-size on the wrong slot (0),
got size 0, and computed dst = pos(0,0) - (w/2,h) = (-400,-600) -> off-screen.
The real engine returns -1 -> the fresh branch -> anchor from the INIT2 arrays
-> dst=(0,0).
Fix: GfxState keeps a separate _registry (HashSet) populated only by
Register() (op 0x1a2); QuerySlot returns the handle if registered else -1, and
no longer consults the geometry store or invents slots. Drop AcquireSlot /
GfxObject.Slot / the free-list.
Verified: Age.Cli gfx --boot SC0000.BIN -> all event CGs dst=(0,0), zero
(-400,-600) draws; Godot --boot pages 1/2/4 render opening CGs full-screen;
engine 44/44; sweep parity 284 exit / 13 STEP-LIMIT unchanged.
Docs: engine-re.md (query-registry-vs-geometry-store section), opcodes.toml
0x1a2/0x215 rebuilt; Ghidra helpers gfx_registry_map_find/hash_insert
annotated + saved. Tests rewritten to the native contract.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Reversed create/set/draw-texture handlers + gfx_render_frame: surfaces at ctx+0x52bd4[slot]
(set-texture loads a file with a colorkey); objects in the ctx+0x408 registry reference a
surface by slot (live) + rect + position (V24) + visible bit; render iterates the registry
in ASCENDING HANDLE ORDER (= z-order) and composites visible objects. Answers both unknowns
(z-order = handle; slot 0 not special). Design spec + Phase 1 plan rebuilt on this model,
replacing the flawed flat-layer version. Ghidra annotated (gfx_op_0x1f8/9/b, gfx_object_bind_draw,
gfx_render_frame, gfx_object_composite, gfx_op_0x20c_present_frame).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
RE correction: op 0x1f7's worker gfx_registry_erase_range (@0x47d8b0) loops
gfx_registry_erase over [handle, handle+count) — a teardown, not a create.
Objects are created lazily by the geometry SET ops (gfx_object_get_or_create).
GfxState.EraseRange + VM case + tests; opcodes.toml renamed gfx-elem-create ->
gfx-elem-erase; Ghidra handler + workers annotated. Booted SC0000 CG geometry
unchanged for the working CGs (no regression). Engine 40 green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
VM dispatches on the opcodes.toml label field (OpcodeTableJson), so the 14 gfx
ops' labels are set to their dispatch strings. Ops still stubbed until the VM
cases land (Task 3.3+); full suite green (34), lint clean.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Ghidra-read all 13 still-stubbed gfx-family handlers via the dispatch table
(0x1a2/0x1f7/0x1fa/0x1ff/0x202/0x203/0x212/0x213/0x216/0x217/0x218/0x219/0x21a);
recovered 0x219 (was unanalyzed). Every op writes a cmd-type into the current
object record then SETs fields (native worker) or QUERYs fields (returns to
operands). Recorded the op-contract table in engine-re.md, set opcodes.toml
semantics (source=investigation, confidence=high), renamed handlers in Ghidra.
Key finding: the drift has TWO stubbed drivers, not one — 0x215 (slot-select)
AND 0x218/0x21a (per-object geometry vectors feeding the anchor-preserve math).
The subsystem is a per-object record model (slot + position/anchor 3-vectors +
color) queried by the ops; native DirectDraw workers need not be modelled. This
is the spec for Phase 2 (host-side model design).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Read op 0x215's real handler FUN_0042a0b0 (resolved via the dispatch table
ctx[0x26c93+op]; Kelebek's 0x421160 is VA-drift). It writes cmd-type 5 into the
current gfx-object record and returns a std::map::find over an engine-internal
registry populated by sibling gfx ops (0x1a2 hash insert). The return is native
command-buffer state, not the VM global bank -> seeding story-state cannot fix
the drift. Verdict: (b) a genuine native op, NOT (a) state-divergence.
Reconcile the previously contradictory drift accounts onto one canonical home
(engine-re.md op 0x215), with opcodes.toml carrying the opcode-level semantics
and phase-a-slice-plan / tools-reference / frida README corrected to point at it
instead of repeating the disproven state-divergence conclusion.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Also gate Stub events under TracingSteps: stubbed ops are per-instruction
frequency (0x258/0x259 stmt markers en masse), so --trace stays a clean
high-level flow view; --trace-steps shows step+stub detail.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Typed ITraceSink/TraceEvent seam in Age.Engine (zero deps, allocation-free
hot path); relocate CallScript/OnStub off IHost; Null + Text sinks; CLI
--trace; Godot dispatch hack retired onto a sink. Serilog/EventSource
deferred to optional edge sinks.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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>
