feat(adapters): add Agent Kernel guardrail adapter - #71
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ACF firewall as InputGuardrail and OutputGuardrail in Agent Kernel's guardrail system. Maps ALLOW/BLOCK/SANITISE to ALLOW/BLOCK/OVERRIDE. Lazy imports so SDK works without agentkernel installed. Fail-closed on firewall errors.
12 tests covering decision mapping, sanitise override, error handling, empty input edge cases. Full suite 121/121.
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Second framework adapter. Integrates ACF as a guardrail in Agent Kernel (https://github.com/yaalalabs/agent-kernel), sitting alongside their OpenAI and Bedrock guardrail options.
What it does
Two classes:
ACFInputGuardrailandACFOutputGuardrail. Both implement Agent Kernel's guardrail interface so ACF plugs in natively.Decision mapping:
Decision.ALLOW→GuardrailAction.ALLOWDecision.BLOCK→GuardrailAction.BLOCKSanitiseResult→GuardrailAction.OVERRIDE(cleaned text replaces original)Fail-closed on firewall errors. Lazy imports so the base SDK works without agentkernel installed.
Users can configure it in Agent Kernel's config (
provider: acf) or instantiate directly.Why Agent Kernel
It's framework-agnostic — sits above LangGraph, CrewAI, OpenAI Agents SDK, Google ADK. One adapter here means ACF works with all of them through Agent Kernel's runtime.
Files
sdk/python/acf/adapters/agent_kernel.py— adapter + factory registrationsdk/python/tests/adapters/test_agent_kernel.py— 12 tests, mocks agentkernel depsTests
12/12 adapter tests. Full suite 121/121.