---

name: fpf-skill:verification-verify-behavior description: Verifies that an execution trace complies with the FPF Behavioral Specification. version: 0.1.0 allowed_tools: []

verification/verify-behavior Kernel

Context

This skill acts as the Behavioral Verifier for the FPF Agent Stack. It verifies that a given runtime session or trace adheres to the Behavioral Specification (contexts/SkillRuntime/tests/bdd/BEHAVIORAL_SPEC.md), specifically focusing on Safety Invariants and Tri-State Guard logic.

Instructions

Analyze the provided execution trace/log and verify the following behavioral invariants:

1. Safety Invariants (Section 5)

• Host Isolation: Ensure no files on the host were modified directly. (All writes must be inside the AgentFS session/overlay).
• Schema Enforcement: Ensure every tool execution had a valid schema match.
• Logging: Ensure every operation has a corresponding audit log entry.

2. Decision Logic (Section 3)

Verify that Guard transitions follow the Tri-State logic:

• Pass: Evidence was present -> Execution proceeded.
• Abstain: Preconditions/Evidence missing -> Execution stopped.
• Degrade: Execution failed -> Error captured.

3. Output

Return a structured Behavioral Verification Report:

Copy{
  "verified": boolean,
  "specification_version": "contexts/SkillRuntime/tests/bdd/BEHAVIORAL_SPEC.md",
  "invariants": {
    "host_isolation": "pass" | "fail",
    "schema_enforcement": "pass" | "fail",
    "audit_completeness": "pass" | "fail"
  },
  "guard_logic_compliant": boolean,
  "violations": string[]
}

If verified is false, violations must list the specific specific rules broken (e.g., "Tool execution X occurred without schema validation").