fix(proxy): add arguments to Cedar context; hash all audit entries (POLICY-004, POLICY-005) - #213
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…OLICY-004, POLICY-005) Cedar context now includes the `arguments` dict so policies can inspect tool call parameter values. Every audit entry (catalog miss, Cedar deny, AGT deny, egress deny, success) now records `request_payload_hash = sha256(canonical_json(arguments))` so the audit chain commits to the exact payload that triggered each enforcement decision. Closes #143, #144 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
_build_cedar_context()now includesargumentsin the returned dict, so Cedar policies can inspect tool call parameter values (e.g. block calls withpatient_idin PHI-restricted domains).audit_chain.append()call incall_tool()now receivesrequest_payload_hash = sha256(canonical_json(arguments)). Covered: catalog miss, Cedar deny, AGT gateway deny, egress deny, and the success path. The hash usessort_keys=Trueand no spaces for determinism.Test plan
test_cedar_context_includes_arguments— Cedar evaluator receivesargumentsin contexttest_audit_payload_hash_present_on_allow— success path audit entry hassha256:...hashtest_audit_payload_hash_present_on_catalog_deny— catalog-miss audit entry has hashtest_audit_payload_hash_present_on_cedar_deny— Cedar-deny audit entry has hashtest_audit_payload_hash_is_canonical_sha256— hash matches expected canonical JSON serialization🤖 Generated with Claude Code