Self-contained pickup brief for the bulky-humanoid bug. Has:
- the bug + acceptance criterion
- everything ruled out this session (with evidence)
- starting facts confirmed via diagnostics
- 4 ranked hypotheses (per-vertex normals → ambient → MSAA → frame
composition) with concrete tests for each
- diagnostic env vars + their output shapes
- the CLAUDE.md grep-named-first workflow
- files most likely to need edits
- live test workflow (env vars, expected entities in Holtburg)
- constraints (don't break drudges / scenery / +Acdream local view)
Designed to drop straight into a fresh agent's prompt window.
