HELM SDK - Python

Typed Python client for the retained HELM kernel API.

Local Install

cd sdk/python
python -m pip install .

Package metadata identifies source target 0.8.4; this README does not claim that a registry package has been published.

Local Development

pip install '.[dev]'
pytest -v --tb=short

Generated Sources

helm_sdk/types_gen.py is generated from api/openapi/helm.openapi.yaml. Generated protobuf modules live under helm_sdk/generated/ when codegen has been run.

Usage

from helm_sdk import EvaluateRequest, HelmClient

client = HelmClient(base_url="http://127.0.0.1:7714")
decision = client.evaluate_decision_v5(EvaluateRequest(
    tool="read-ticket",
    effect_level="ticket:123",
    session_id="example-session",
))
print(decision.verdict)  # ALLOW or DENY

Run the first-class local example with make sdk-examples-smoke or directly from examples/python_sdk/.

Execution Boundary Methods

The client includes helpers for the May 2026 execution-boundary surfaces: evidence envelope manifests, boundary records and checkpoints, conformance vectors, MCP quarantine and authorization profiles, sandbox profiles and grants, authz snapshots, approvals, budgets, telemetry export, and coexistence capabilities.

External evidence envelopes remain compatibility wrappers; HELM-native EvidencePack roots stay authoritative.

Source target

The SDK requires canonical typed evaluation and returns receipt-bearing V5 responses. Verify registry evidence before using a pinned package coordinate.