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Signet-eval offers deterministic policy enforcement for Claude Code

Signet-eval offers deterministic policy enforcement for Claude Code

by jmcentire2025·Mar 21, 2026·2 points·0 comments
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AI Analysis

●●●BangerZero to OneSolve My ProblemBig Brain

Locked self-protection rules prevent agents from disabling their own guardrails.

Strengths
  • •HMAC signature detection triggers fallback to hardcoded safe defaults on tampering
  • •Argon2id + AES-256-GCM encrypted vault with three-tier credential compartmentalization
  • •Cumulative spend tracking per category enforces limits across every tool call
Weaknesses
  • •Currently only hooks into Claude Code, not other AI agent frameworks
  • •Requires manual Claude Code hooks configuration in settings.json
Category
Security
Target Audience

Teams running Claude Code or similar AI agents with spending and safety concerns

Similar To

Clever · LLM Guard · Guardrails AI

Post Description

Policy rules evaluate tool calls before execution using regex and simple conditions. First match wins. No prompt injection surface because there's nothing to inject into. ~60ms cold start, <1ms evaluation.

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