oneharness-sdk

Async Python access to the oneharness engine, generated from and validated against the Rust-owned JSON Schema contracts. The distribution is oneharness-sdk, the import is oneharness_sdk, and every release depends on the exact same oneharness-cli version.

pip install oneharness-sdk

import asyncio

from oneharness_sdk import OneHarness


async def main() -> None:
    oneharness = OneHarness()
    report = await oneharness.run(
        {"prompt": "Summarize this repository", "harnesses": ["codex"]}
    )
    print(report["results"][0]["text"])


asyncio.run(main())

The complete client surface includes run, run_mock, run_stream, list, detect, history, history_list, and history_watch. run_mock uses the deterministic responder shipped in the CLI; see Testing patterns. run_stream and history_watch are async iterators. Every envelope is validated before it is yielded; closing or cancelling an iterator terminates its subprocess.

async for envelope in oneharness.run_stream(
    {"prompt": "Inspect this repository", "harnesses": ["codex"]}
):
    if envelope["type"] == "event" and envelope["event"]["name"] == "shell":
        break

async for envelope in oneharness.history_watch(
    {"labels": {"graph": "release"}, "after": last_history_id}
):
    print(envelope["record"]["history_id"])

Python input keys are snake case and strict: unknown fields and misspellings fail before the CLI starts. Output dictionaries preserve additive fields from newer compatible CLI versions. history and history_watch raise HistoryNotFoundError when a session, record, or cursor cannot be resolved.

Project links

Data verified by PyPI on Aug 9, 2026
Data provided by the project maintainers, verified at the time the release was uploaded to PyPI.

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  • Released:
Newer release available (0.11.3)

1 maintainer

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Credits

Author: Nick DeRobertis

GitHub Statistics

Data verified by PyPI on Aug 9, 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 expression

MIT
View SPDX License List

Requires

Python >=3.9

Tags

cli agent claude codex harness

Classifiers

Report project as malware

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