HELM governance adapter for anthropic — fail-closed tool calling for AI agents
Project description
helm-anthropic
HELM governance adapter for Anthropic Claude SDK.
What it does
Governs Anthropic Claude tool_use calls through HELM:
- Every tool_use content block is evaluated against HELM policy before execution
- Denied calls raise
HelmToolDenyError(fail-closed by default) - Receipts with SHA-256 hashes are collected for every approved execution
Quick start
from helm_anthropic import HelmAnthropicGovernor
governor = HelmAnthropicGovernor(helm_url="http://localhost:8080")
response = anthropic_client.messages.create(model="claude-sonnet-4-20250514", ...)
approved = governor.govern_message_response(response)
Configuration
| Parameter | Default | Description |
|---|---|---|
helm_url |
http://localhost:8080 |
HELM kernel URL |
api_key |
None |
HELM API key |
fail_closed |
True |
Deny on HELM errors |
collect_receipts |
True |
Keep receipt chain |
timeout |
30.0 |
HTTP timeout seconds |
License
Apache-2.0
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