Assay Python Bindings
assay-it is the Python package for the assay import namespace.
It currently provides a small, bounded surface on top of Assay core:
AssayClientfor writing JSONL trace records from PythonCoveragefor policy coverage analysis against trace/tool-call inputsExplainerfor rule-by-rule explanation of a single trace- a
pytestfixture plugin exposed asassay_client
Install
pip install assay-it
Import path:
from assay import AssayClient, Coverage, Explainer, validate
What It Is
This package is for Python-side trace capture and lightweight policy-analysis helpers. It is useful when you want to:
- append structured trace events to a JSONL file from Python
- analyze tool-call traces against an Assay policy
- explain why a given trace matched or violated policy rules
- use a simple pytest fixture around the Python client
What It Is Not
This package is not the full Assay CLI or the full trust-compiler surface. It does not replace:
assay mcp wrapand runtime MCP enforcement- evidence bundle generation and verification workflows
- Trust Basis / Trust Card generation
- the GitHub Action or release-binary install path
Those outward-facing product surfaces live in the main Assay CLI and repository docs.
Example
from assay import AssayClient, Coverage, Explainer
client = AssayClient("traces.jsonl")
client.record_trace({"tool": "ToolA", "args": {"q": "weather"}})
coverage = Coverage("assay.yaml")
report = coverage.analyze([[{"tool": "ToolA", "args": {"q": "weather"}}]])
explainer = Explainer("assay.yaml")
details = explainer.explain([{"tool": "ToolA", "args": {"q": "weather"}}])
Repository
- Main project: https://github.com/Rul1an/assay
- Current CLI and trust-compiler docs: https://github.com/Rul1an/assay/blob/main/README.md
1 maintainer
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