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Compatibility and parity

API surface​

CrowdyPy follows CrowdyJS at a pinned version and commit, recorded in its pyproject.toml. A strict parity gate fails the build on any CrowdyJS method, class, export or GraphQL root that CrowdyPy lacks. Each remaining difference carries a reviewed reason, and the generated parity matrix lists them all:

  • Native equivalents. The same contract, built CrowdyPy's way: the native replication client in place of the GraphQL UDP proxy, and Python naming.
  • Browser exclusions. The DOM, iframe and Web Worker features no Python client has, such as the embedded Studio panes.

CrowdyPy also wraps the GraphQL roots that CrowdyCPP sends and CrowdyJS does not, including email confirmation, usage projections, compute budgets and the Studio agent's policy.

Native core​

The replication client and the World Stores' native session are CrowdyCPP, vendored at a pinned release. Every release records its CrowdyCPP and CrowdyJS versions in its migration notes.

Python​

CPython 3.12 or later (cp312-abi3), and free-threaded CPython 3.14 (cp314t). CrowdyPy is pre-1.0. Patch releases keep source compatibility, and a new minor version may change the API, as described in each release's migration notes.