capture_global_writes.py hooks vm_operand_write@0x425fb0 (plaintext values,
before the obfuscated store — sidesteps the shelved flat-scan problem) and folds
the engine's global-int writes into a GameSession snapshot. --spawn captures from
boot (packer-aware: polls until the code unpacks, then attaches — AGE.EXE unpacks
in-place so a spawn-time hook hits packed bytes; also kills the spawned pid if
setup fails so no suspended orphan). Age.Cli 'trace ... --state <snap>' runs a
scene from the captured state.
Validated: a real boot->new-game->SC0000 capture (34008 globals incl. G[0x6c1]=1)
seeds the VM to match the engine's ENTIRE opening (542 ops, no non-realignable
fork) with zero manual seeding. Residual: a 2-op color detour (0x202/0x203)
unfixed by state = a real branch diff to chase. Engine 81/81, diff 5/5.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
JsonOffsetTraceSink records every executed instruction offset (bytecode word
index) of one target script, in order, filtered to the scene's own frame
(call-script subroutines excluded) to match the Frida engine tracer's
per-codebase filter. Wired as 'trace <SCENE.BIN> [--boot] --trace-json <out>'.
Observe-only; sweep path and trace parity untouched. +2 xUnit tests.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Traced end-to-end (AGE_DIAG_SETTEX): set-texture slot=G[0x62452] <- query-gfx-object?
(-1 for unregistered CG handles) -> fallback lookup-array-2d(rec[s3]=G[0x3239])=0
because the slot table is never filled: label_125bd (SC0000 0x50f, slots 4..13) is
gated behind the scene-coroutine framework (0x140 coroutine-yield, stubbed). Adds
env-gated VM set-texture/query slot diagnostics + GfxState.IsRegistered.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Root cause (evidence: gfx-log) of the opening-CG grey background: a CG drawn with
(alpha=0, color=white) means 'no tint' = fully opaque, but slice-A conflated the
color alpha with object opacity -> the CG rendered transparent. RenderObject now
carries TintStrength separately from Alpha (opacity); resolution keeps textured
objects opaque. Tests updated to the evidence-based semantics.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
