autocad-mcp-pro/CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

Next: closed-loop refiner (critique→repair→re-critique with transaction-stack isolation), pre-plan clarification pass, ISO 286 fit-table lookup (H7/g6 → deviations), and a local-VLM visual judge.

[1.2.0] — 2026-07-07

Production-ISO parity + a measurable quality moat. 360 tests, ruff-clean. Tool count: 111 → 116.

Added

• drawing_settings — read or change common AutoCAD drawing settings by friendly name (units mm/cm/m/inch/feet, linear/angular precision, LTSCALE, DIMSCALE, text size, point mode/size, OSMODE, fillet radius) without memorising system-variable names. Call with no argument for a full snapshot. A convenience facade over system_get_variable / system_set_variable; cross-backend.
• In-place editing — entity_edit_text re-labels or resizes an existing TEXT/MTEXT entity, and entity_edit_geometry re-drives a CIRCLE/LINE/ARC (center, radius, endpoints, arc angles) — both preserve the entity handle, so the user can adjust a drawing without delete-and-recreate. Cross-backend.
• 2D GD&T (ISO 1101 / ASME Y14.5) — gd_frame draws a feature control frame (all 14 geometric characteristics, ⌀ zone prefix, Ⓜ/Ⓛ/Ⓢ material modifiers, multi-datum references) and datum_feature places a datum symbol. Frames are composed from LINE + TEXT so they render identically on both the COM and ezdxf backends (ezdxf's native TOLERANCE entity renders blank via matplotlib). No competing CAD MCP or surveyed text-to-CAD product ships 2D GD&T authoring.
• GD&T datum-consistency gate — a new gdt critique focus fails drawing_finalize when a feature control frame references a datum with no matching datum feature (a meaningless FCF per ISO 1101).
• ISO 129 dimension tolerances — dimension_linear / dimension_radius / dimension_diameter gain tol_upper / tol_lower / tol_mode (symmetric ±, deviation +a/-b, limit stacked, basic boxed) and a text_override (e.g. ⌀20 H7). Toleranced production dimensions are now possible — previously the single biggest functional gap.
• Scalar drawing-score + invalidity ratio (engineering/scoring.py) — the drawing_finalize payload now carries a 0-100 score, an invalidity_ratio, and an A-F grade over the union of the structural validator and the premium critique, so drawing quality is regression-trackable (MUSE / CadBench grade an Invalidity Ratio, not shape).

Fixed

• Honesty: the COM backend advertised a false all_entity_types capability (it authors 2D entities only, no 3D solids) — corrected to entities_2d.

[1.1.1] — 2026-06-20

Added

• selection_get (Entity Query, COM backend): reads AutoCAD's implied ("pickfirst") viewport selection — the entities the user highlighted with grips before invoking the AI — and returns their handles + EntityInfo. This lets the AI scope work to exactly what the user picked (dimension_auto(selection_get()["handles"])) instead of acting on the whole drawing. Resolves #1 — the layer-juggling workaround is no longer needed. Surfaces the PICKFIRST sysvar state so an empty selection is self-explanatory. The ezdxf headless backend has no viewport, so it returns ok=False with an empty handle list (same shape, never raises). Tool count: 110 → 111.

[1.1.0] — 2026-06-19

Correctness, cross-backend parity, and an enforced quality gate, landed across four audited sprints (see docs/analysis/). 318 tests, ruff-clean.

Added

• Premium drafting workflow (shared across both backends): drawing_plan, drawing_critique (ISO-128 focuses), point_from_snap, drawing_apply_iso_layers, dimension_auto, entity_select_smart, construction_xline / construction_clear.
• Deterministic geometry for exact OSNAP coordinates: point_intersection (line/line, line/circle, circle/circle) and point_tangent (external point → circle).
• Engineering / deterministic CAD layer: involute gear front view + section A-A, DIN 6885 keyed bore, ISO A3 title block, and the 8-step drawing_finalize validator.
• HTTP bearer-token auth: StaticTokenVerifier wired into FastMCP when MCP_AUTH_TOKEN is set.
• Mocked-COM test harness (tests/test_com_backend.py + Sprint-3/4 suites) — COM logic is now regression-tested on Linux CI without a live AutoCAD.
• entity_create_mtext rotation parameter; dimension_auto layer override; bounding_box / ARC length / TEXT-MTEXT rotation+char_height on both backends; BlockInfo.description.
• Security module (security.py), centralized config (config.py), .env.example, path validation, command/LISP sanitization, ruff config, pre-commit hooks, pytest-cov.

Changed

• drawing_finalize now enforces the premium critique in addition to the structural validator: leftover construction geometry, non-ISO-128 lineweights, untrimmed corners, duplicate entities, and dimension overlap block the gate (was advisory-only). strict_critique=True fails on warnings too.
• drawing_save_as derives the on-disk format from the file extension — part.dxf writes DXF, not DWG. ezdxf refuses to mislabel a .dwg file.
• Dimension and construction layers resolve from the active layer set (iso13567 → M-DIMEN-T-N / M-CONST-E-N, not the hardcoded DIM / CONSTRUCTION).
• Premium meta-tools lifted into the shared AutoCADBackend base class (single source of truth).
• Dead code removed (section.py, generate_tooth_profile, CommandResult, set_layer_active, …).

Fixed

• ezdxf dimension_aligned / dimension_angular raised TypeError (wrong ezdxf 1.4 args) — fixed.
• Full-circle polar array placed a duplicate copy over the original — fixed (divisor = count).
• entity_offset ignored side_x/side_y on both backends — now honored (and COM no longer leaks extras).
• COM entity_create_hatch built an associative hatch then deleted its boundary — now non-associative.
• Lineweight mm-vs-hundredths truncation wiped ISO-128 weights — fixed via normalize_lineweight.
• view_screenshot / drawing_export_pdf could SIGSEGV (matplotlib GUI backend in a worker thread) — now render headless via Agg (Figure + FigureCanvasAgg).
• entity_select_smart length_range silently rejected all ARCs (no length) — fixed.
• Gear tooth profile self-overlapped for high tooth counts (z ≥ ~42); section view drew duplicate bore lines; validator keyway heuristic was a permanent false-negative — all fixed.
• COM system_run_lisp always reported "nil"; system_set_variable didn't coerce numeric sysvars — fixed. system_about tool groups / _registered_tool_count no longer drift or surface -1.
• drawing_new bootstrap failures now surface as degraded instead of reporting success.

Security

• HTTP remote-bind guard now fires on every launch path (including fastmcp run server.py:mcp), not only the __main__ block — closing an anonymous-remote-bind gap.
• AutoLISP allowlist bypass-vector regression tests (newline injection, symbol aliasing, vla*/acet-*, c: custom commands).
• COM apartment leak bounded (CoUninitialize on teardown); transaction commit/rollback and system_run_lisp now respect the CMDACTIVE guard.

[1.0.0] — 2026-03-01

Added

• Initial release with 67 tools, 6 resources, 5 prompt templates
• Dual-engine architecture: COM backend (live AutoCAD) + ezdxf backend (headless)
• FastMCP 3.0 server with middleware stack (error handling, audit, timing, logging)
• Drawing management: new, open, save, save-as, export DXF/PDF, purge, audit, undo/redo
• Entity creation: line, circle, arc, polyline, rectangle, text, mtext, hatch, spline, ellipse, point, block reference
• Dimensions: linear, aligned, angular, radius, diameter
• Entity modification: move, copy, rotate, scale, mirror, offset, delete, rectangular/polar array
• Layer management: create, delete, set current, modify, freeze/thaw, lock/unlock, hide/show, isolate
• Block operations: list, insert, explode, attributes, create from entities, find references
• Analysis: entity stats, region search, distance/area measurement, bounding box, select by layer/type
• View control: zoom extents/window, screenshot
• Transaction support: begin, commit, rollback
• System tools: status, variables, command execution, AutoLISP evaluation
• 5 prompt templates: floor plan, P&ID, electrical schematic, mechanical drawing, quick drawing