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ai-agent

LibreCAD

LibreCAD is a cross-platform 2D CAD program. It can read DXF/DWG, and write DXF/DWG/PDF/SVG files. It supports point/line/circle/ellipse/parabola/hyperbola/spline primitives. The GUI is highly customizable, and has dozens of translations.
6,498 stars+14★ this week1,399 forksC++Updated 10/21/2026100% free · open source
What it does

LibreCAD is a 2D computer-aided design program that allows users to create and edit technical drawings in various formats, including DXF, DWG, PDF, and SVG.

When to use it
  • • Creating architectural floor plans or technical drawings
  • •Designing and visualizing 2D models for product development or manufacturing
  • •Converting or editing existing CAD files in various formats
Ready-to-paste prompt
Open an existing DWG file by selecting 'File' > 'Open' and navigating to the file location, then use the 'Entity Info' tool to inspect the properties of the drawing elements
Heads up: LibreCAD requires Qt 5.6 or later to be installed on the system, and the build process may fail if this dependency is not met
Saves to your device
Use with Claude
New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🛠️ Technical setup

Expect 20–40 minutes in a terminal — or let your AI agent drive it.

Try it instantly — no install
Claude Code
mkdir -p ~/.claude/skills/librecad && curl -fsSL https://workflowstacks.com/api/skills/librecad/claude-skill -o ~/.claude/skills/librecad/SKILL.md
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How LibreCAD works
Codeflow
Free to inspect

LibreCAD is a very large C++ project (~589k lines across 2340 code files, plus 119 test files). It is a full software project: use it through its install path rather than reading it end to end. Last commit this month, Other license, has a test suite.

Size
Very large codebase
~589k lines · 2340 code files · days to read — use, don't read
Setup
Developer setup
A real software project. Use it via its install path; don't expect to read it all.
Runs on
C++
No API keys detected
C++ 85%C 12%Python 1%CMake 1%Shell 1%
Where to start reading
  1. 1
    README.md
    Start here — what it does and how to install it
  2. 2
    librecad/ts/README.md
    Inside librecad/ — the main logic begins here
What's in each folder
librecad/Core code — the actual logic4279 files
plugins/Sub-packages / plugins132 files
docs/Documentation28 files
desktop/Folder744 files
libraries/Folder177 files
test_data/Folder107 files
ChangeLogs/Folder106 files
scripts/Helper scripts86 files
READMEHas testsDocumentedCI checksOther licenseUpdated this month
Quick Actions
Details
Creator
LibreCAD
Language
C++
Category
ai-agent
Published
4/10/2011

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Featured on WorkflowStacks
[![Featured on WorkflowStacks](https://workflowstacks.com/api/badge/librecad.svg)](https://workflowstacks.com/skills/librecad?utm_source=github&utm_medium=badge)
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