hg_cpp

A clean-slate, C++-first implementation of the hgraph functional-reactive time-series runtime. The C++ runtime is the source of truth. Python provides wiring compatibility and supports Python-authored nodes running inside that runtime.

Python package

The C++-backed compatibility package is published under the hg_cpp distribution name:

python -m pip install hg_cpp

The distribution exposes the hgraph import package and the native _hgraph extension. Install it in an isolated environment rather than alongside the main hgraph distribution, since both provide the same Python import namespace. One wheel per supported platform covers CPython 3.12 and later through the CPython stable ABI. The supported Python and platform policy is recorded in docs/source/developer_guide/release_readiness.rst.

Build & test

cmake -S . -B build                 # configure (fmt + Catch2 fetched if absent)
cmake --build build -j              # build hgraph_core + tests
ctest --test-dir build --output-on-failure

Requires a C++23 compiler and CMake >= 3.25. Python/nanobind are not needed for the default build (bindings are opt-in via -DHGRAPH_BUILD_PYTHON_BINDINGS=ON).

Documentation

Sphinx docs live under docs/source (uv sync --extra docs, then uv run sphinx-build -W -b html docs/source docs/_build/html):

  • User guide — start at docs/source/user_guide/quick_start.rst, then the authoring/testing guides for nodes, graphs, and the eval_node harness.
  • Developer guide — the authoritative design records (docs/source/developer_guide/): architecture, data structures, wiring, nested graphs, mesh, services, error handling, operators, roadmap.

Contributing / AI sessions

  • AGENTS.md — canonical project direction: goals, build philosophy, source layout, dependency policy, git hygiene.
  • CLAUDE.md — the operational working guide: the enforced design-first workflow (docs change in the same commit as code), guardrails, architecture map, and current state.
  • The read-only ext/main tree is the canonical Python hgraph reference.

Project links

Data verified by PyPI on Jul 27, 2026
Data provided by the project maintainers, verified at the time the release was uploaded to PyPI.

Key dates

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  • Released:
Newer release available (0.4.18)

1 maintainer

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Avatar for hhenson from gravatar.com hhenson

Credits

Author: Howard Henson

GitHub Statistics

Data verified by PyPI on Jul 27, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License

MIT License (MIT)

Requires

Python >=3.12

Provides Extra

python test parity web sql snowflake kafka delta perspective dataframe docs dev

Tags

reactive graph forward propagating graph time series functional reactive programming c++

Classifiers

Report project as malware

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0.4.18

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0.4.16

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0.4.9 This release

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0.4.6

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