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tangency-labs / fieldcraft

One open-source modeler for structures, heat and fluids, built from scratch in pure Rust: parametric part in, verified results out. Automatic all-hex and tet meshing, our own nonlinear implicit and explicit FEA, heat transfer and lattice Boltzmann CFD — every result checked against theory. For engineers and AI agents alike. Free, forever.

Why this job: works in the areas we cover, but does not say which job it does

Open on GitHub (opens in new tab)Website (opens in new tab)
The bracket split into 30 coloured cells
The all-hex mesh with O-grids round the holes
Von Mises stress peaking at the hole, with the clamp cones and load arrows
The FieldCraft window: a clamped cantilever with its supports, pressure, gravity and a coupled reference point drawn in the viewport
Claude analyses an I-beam cantilever in FieldCraft over MCP: it opens the part, hex meshes it, sets steel, the clamp and a 1 kN tip load, solves, shows von Mises stress and the deformed shape, and checks the tip deflection against beam theory
An AI agent analyses an I-beam cantilever in FieldCraft over MCP: open, hex mesh, steel, clamp and tip load, solve, von Mises contours, the deformed shape and an orbit round it
1 of 6

What it does

  • Geometry in. SolidCraft designs (.solidcraft) with persistent face, edge and body names,
  • Meshing. constrained Delaunay tetrahedra (tet4, tet10) with exact predicates and a
  • Elements. solids (tet4, tet10, wedge6, hex8 with incompatible modes, hex20 full and
  • Model. sets bound to geometry names, so they survive remeshing; isotropic and orthotropic
  • Solvers. linear static and frequency (supernodal Cholesky, block Lanczos); nonlinear static

Get started

No single install command. Read the steps in the README (opens in new tab)

Maintenance
Active
Last commit today
Stars
376
+51 this week
Licence
Apache-2.0
Allows business use
Downloads for
3 systems
Mac, Windows, Linux
Latest version
v0.7.5
Released 7 days ago
Built with
Rust
97% of the code

Is it looked after?

Contributors
7
Last 90 days
Issues
73% closed
107 still open
Pull requests
469 merged
14 waiting
Releases
16
16 in the last year

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More: download files, languages, topics and project record

Download files, v0.7.5

  • Mac2 files, 183 downloads
  • Windows1 file, 436 downloads
  • Linux4 files, 389 downloads

All files on GitHub (opens in new tab)

Languages

  • Rust 97%
  • WGSL 1%
  • Python 1%
  • JavaScript <1%

Topics

  • cae
  • cfd
  • computational-mechanics
  • explicit-dynamics
  • fea
  • finite-element-analysis
  • lattice-boltzmann
  • mcp
  • structural-analysis
  • ai-agents
  • engineering
  • fem

Project record

  • JobOther AI tools
  • StatusListed
  • Commits1,036
  • Forks60
  • Watching7
  • Stars in 28 days+368
  • CreatedOct 13, 2026
  • First seen by usNov 7, 2026
  • CheckedNov 12, 2026

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