v0.4.0

Give the builder eyes, and drive bulk builds natively. Folds in the Rivian
R1S / "Gear Guard Gary" retrospective: a representational build iterated blind
fails on silhouette, and hundreds of one-at-a-time fills are infeasible. Pairs
with minecraft-java-fabric-mcp-server
v0.2.0, which adds the native tools this release leans on (block_fill_batch,
block_render_region, block_scan_summary, block_get_map_color, auto-tiling
fills). Verified end-to-end against a live 26.1.2 world.

Added

• Voxel toolkit (tools/voxel/, Python — stdlib + numpy + Pillow). Author a
  form as a parametric numpy model (ellipsoid/cylinder/line3d/box,
  fractional anchors, mirror_x), render three orthogonal views to PNG
  (render_views), and decompose it to a world-space fills list (write_fills_json,
  greedy maximal boxes split to ≤32k). A building palette maps voxel codes to
  block ids + RGB. Worked example + smoke test in tools/examples/example_bean.py.
  Deps documented in tools/requirements.txt; usage in tools/README.md.
• Render-verify workflow woven into monument-builder (+ new
  reference/render-verify.md), inspector, and surveyor: author → render →
  iterate vs. references → place via block_fill_batch → confirm with a
  scan-render (block_render_region). The "imported meshes are not authoritative"
  guardrail is spelled out.
• reference/engine-limits.md — one canonical, cross-skill list of hard tool
  limits and verified behaviour, cited by the orchestrator and block-placing skills.
• Bean showcase image in the README (docs/images/bean.png).

Changed

• Scale-pinning added to the planner interview: fix the size ratio between
  co-located subjects before any blocks (a 70-tall vehicle beside an 18-tall
  figure forces rebuilds).
• Engine-limits guidance corrected from live testing (26.1.2): fills now
  auto-tile past 32,768 server-side (confirmed); datapack functions are inert
  (function_run//reload do nothing — keep using direct block ops);
  structure_file_write writes a file but isn't loadable in-session (use
  structure_save_from_world/structure_load_to_world, which work).
• CLAUDE.md documents the new tools/ Python layer (deps + smoke test) and
  the reference/engine-limits.md convention.