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feat(understand): drawing_understand - units, extents, clusters, layers, tags, rooms

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A drawing somebody else made, read back as one report in which every
claim carries its evidence and a confidence; the drawing is never
modified.

- units.py: $INSUNITS against the unit the geometry implies (text
  heights, wall thickness, door swings, labelled room areas, overall
  size). The header is overruled only when the evidence outweighs it,
  and then with a warning that quotes the numbers. Robust extents grow
  from the quartile box of entity centres; what never joins is an
  outlier, named by handle.
- clusters.py: separate bodies of model-space content by raster,
  8-connectivity and box absorption - two copies of one plan are two
  clusters.
- describe.py: layers with drawn length and the vocabulary's meaning
  (name keyword, else the texts on the layer), equipment tags (one tag
  lettered twice beside its symbol merged, repeats flagged ambiguous),
  room labels in the wall-layer faces of engineering.arch.faces, text
  languages by character class, blocks, layouts, the title block.
- server.py opens SECTION 26 (Understanding & QA) with
  drawing_understand: core, read-only, tagged analysis/query. Alias
  record, inventory, README release snapshot 242, frozen group sizes
  (analysis 13).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
This commit is contained in:
Umut CAN
2026-09-24 11:50:41 +03:00
co-authored by Claude Opus 5.5
parent 704a44b190
commit 2459694880
12 changed files with 1818 additions and 8 deletions
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README.md
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@@ -27,8 +27,8 @@ Live through COM on Windows, or headless through ezdxf anywhere — one typed co
</div>
> **v1.5 release snapshot:** 241 tools · 8 resources · 5 prompt templates · 4516 collected tests.
> 241 is the **registered** count; a default install advertises 236 over `tools/list`,
> **v1.5 release snapshot:** 242 tools · 8 resources · 5 prompt templates · 4516 collected tests.
> 242 is the **registered** count; a default install advertises 237 over `tools/list`,
> because `ENABLE_3D` is unset. `system_about` is the runtime authority.
## Why this exists
@@ -122,7 +122,7 @@ Claude Desktop, Cursor, or any stdio MCP host. For HTTP: `autocad-mcp --transpor
| Quality loop | `drawing_preflight` → `drawing_plan` → `drawing_critique` → `drawing_refine` → `drawing_finalize` (0–100 score) |
| Delivery | `drawing_deliver`: DXF/PDF/PNG + SHA-256 manifest + reopen-parity checks |
<sub>241 tools in 26 groups; <code>TOOL_PACKS=core</code> hides the nine <code>pid_*</code> tools, the 22 environment tools, the 14 mechanical tools and the 12 architectural tools (<code>TOOL_PACKS=core,mech</code> keeps the mechanical ones, <code>TOOL_PACKS=core,arch</code> the architectural ones) from a client that needs none of them. Plus 8 resources that cost nothing in the tool budget (<code>autocad://drawing/info</code>, <code>layers</code>, <code>blocks</code>, <code>entities/stats</code>, <code>entities/{layer_name}</code>, <code>system/status</code>, <code>pid/symbols</code>, <code>standards/isa51</code>) and 5 prompt templates.</sub>
<sub>242 tools in 26 groups; <code>TOOL_PACKS=core</code> hides the nine <code>pid_*</code> tools, the 22 environment tools, the 14 mechanical tools and the 12 architectural tools (<code>TOOL_PACKS=core,mech</code> keeps the mechanical ones, <code>TOOL_PACKS=core,arch</code> the architectural ones) from a client that needs none of them. Plus 8 resources that cost nothing in the tool budget (<code>autocad://drawing/info</code>, <code>layers</code>, <code>blocks</code>, <code>entities/stats</code>, <code>entities/{layer_name}</code>, <code>system/status</code>, <code>pid/symbols</code>, <code>standards/isa51</code>) and 5 prompt templates.</sub>
**Two rules worth knowing.** Every coordinate in and out of a tool is WCS on both engines — the one exception is TEXT `rotation`, which stays in the entity frame because a mirrored TEXT is mirror-imaged and no scalar angle expresses that. And never read vertices back and shoelace them: that loses **28.2%** of the area on a semicircular edge, silently. `analysis_measure_entity(handle)` reads the real geometry and states its own accuracy.