PurrA
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PurrA is a product-neutral Agent runtime for applications that need explicit control over model calls, tools, state, and recovery.
Python and JavaScript/TypeScript are independent implementations of the same safety contracts.
Install
Python 3.11+:
pip install purra
Node.js 22+:
npm install purra
The npm package is native ESM.
Start
Python Runs enter through purra.api.AgentCore.submit(). See the runnable
Python quickstart.
For JavaScript and TypeScript, see the package guide and quickstart.
Reactive execution is the default; Planned and Durable execution are opt-in. The host supplies Provider adapters, tools, business authorization, and production persistence. See Architecture for runtime guarantees and ownership boundaries.
Compatibility
PurrA is pre-1.0. Breaking public-contract changes require a new minor release. Python and npm packages use the version encoded by the same Git tag; matching versions do not imply automatic capability parity.
Links
License
1 maintainer
Metadata
1 maintainer
Release files for purra 0.4.1
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | Provenance | Actions |
|---|---|---|---|---|
| purra-0.4.1.tar.gz | 375.4 kB | With provenance | Details for purra-0.4.1.tar.gz |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Actions Reset |
|---|---|---|---|---|
| purra-0.4.1-py3-none-any.whl | Python 3 | none | any | Details for purra-0.4.1-py3-none-any.whl |
Total release size: 734.2 kB
Release files / purra-0.4.1.tar.gz
| Download URL | purra-0.4.1.tar.gz |
|---|---|
| Size | 375.4 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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BLAKE2b-256 checksum How to use checksums |
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| Upload date | |
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Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
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Provenance
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PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Aug 27, 2026.
Transparency logRelease files / purra-0.4.1-py3-none-any.whl
| Download URL | purra-0.4.1-py3-none-any.whl |
|---|---|
| Size | 358.8 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
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|
|
BLAKE2b-256 checksum How to use checksums |
7267ac574476a05db4903b10261c54509c493849f75351cce3ff71ee5cd6aaa2
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Aug 27, 2026.
Transparency logSecurity for purra 0.4.1
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
Full provenance
All 2 files in this release have been uploaded with provenance metadata.
Attestation for purra-0.4.1.tar.gz
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Aug 27, 2026.
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To learn more about protecting yourself from malicious actors, visit our package security documentation.
