tesseract-core 1.5.0

A toolkit for universal, autodiff-native software components.

Tesseract Core

Universal, autodiff-native software components for Simulation Intelligence 📦

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The problem

Real-world scientific workflows span multiple tools, languages, and computing environments. You might have a mesh generator in C++, a solver in Julia, and post-processing in Python. Getting these to work together is painful. Getting gradients to flow through them for optimization is nearly impossible.

Existing autodiff frameworks work great within a single codebase, but fall short when your pipeline crosses framework boundaries or includes legacy/commercial tools.

The solution

Tesseract packages scientific software into self-contained, portable components that:

• Run anywhere — Local machines, cloud, HPC clusters. Same container, same results.
• Expose clean interfaces — CLI, REST API, and Python SDK. No more deciphering undocumented scripts.
• Propagate gradients — Each component can expose derivatives, enabling end-to-end optimization across heterogeneous pipelines.
• Self-document — Schemas, types, and API docs are generated automatically.

Who is this for?

• Researchers interfacing with (differentiable) simulators or probabilistic models, or who need to combine tools from different ecosystems
• R&D engineers packaging research code for use by others, without spending weeks on DevOps
• Platform engineers deploying scientific workloads at scale with consistent interfaces and dependency isolation

Example: Shape optimization across tools

The rocket fin optimization case study combines three Tesseracts:

[SpaceClaim geometry] → [Mesh + SDF] → [PyMAPDL FEA solver]
         ↑                                      |
         └──────── gradients flow back ─────────┘

Each component uses a different differentiation strategy (analytic adjoints, finite differences, JAX autodiff), yet they compose into a single optimizable pipeline.

Quick start

[!NOTE] Requires Docker and Python 3.10+.

$ pip install tesseract-core

# Clone and build an example
$ git clone https://github.com/pasteurlabs/tesseract-core
$ tesseract build tesseract-core/examples/vectoradd

# Run it
$ tesseract run vectoradd apply '{"inputs": {"a": [1, 2], "b": [3, 4]}}'
# → {"result": [4.0, 6.0], ...}

# Compute the Jacobian
$ tesseract run vectoradd jacobian '{"inputs": {"a": [1, 2], "b": [3, 4]}, "jac_inputs": ["a"], "jac_outputs": ["result"]}'

# See auto-generated API docs
$ tesseract apidoc vectoradd

Core features

• Containerized — Docker-based packaging ensures reproducibility and dependency isolation
• Multi-interface — CLI, REST API, and Python SDK for the same component
• Differentiable — First-class support for Jacobians, JVPs, and VJPs across component and network boundaries
• Schema-validated — Pydantic models define explicit input/output contracts
• Language-agnostic — Wrap Python, Julia, C++, Fortran, or any executable behind a thin Python API

Ecosystem

• tesseract-core — CLI, Python API, and runtime (this repo)
• Tesseract-JAX — Embed Tesseracts as JAX primitives into end-to-end differentiable JAX programs
• Tesseract-Streamlit — Auto-generate interactive web apps from Tesseracts

Learn more

• Documentation
• Creating your first Tesseract
• Differentiable programming guide
• Design patterns
• Example gallery

License

Tesseract Core is licensed under the Apache License 2.0 and is free to use, modify, and distribute (under the terms of the license).

Tesseract is a registered trademark of Pasteur Labs, Inc. and may not be used without permission.