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())
Every JSON-returning method passes --format json --compact itself, so the CLI's own default (a human-readable text view) never reaches the SDK. A run over several harnesses is a fallback chain by default — the first candidate that can run does, and the report's fallback block says which; pass "run_mode": "parallel" to run them all at once.
The client covers every verb the CLI exposes, so nothing needs a hand-built command line: run, run_mock, run_stream, list, detect, config, sync, init, usage, gate, mock, interrupt, history, history_list, history_watch, history_clear, history_migrate, history_reindex, and history_pointers. That coverage is gated, not asserted here. 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.
An option whose name is a Python keyword takes the conventional trailing underscore — sync({"global_": True}) sends --global — and nothing else about the spelling changes.
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.
1 maintainer
Metadata
1 maintainer
Release files for oneharness-sdk 0.25.5
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