gamer147 a8f742cf57 feat(tools): per-scene opcode completeness tracker + 0x259 marker fix ...

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>

2026-07-07 22:57:25 -04:00

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