Configure Cedar policy enforcement and Ed25519 signed receipts for Claude Code tool calls. Use when setting up projects that need cryptographic audit trails, policy-gated tool execution, or compliance-ready evidence of agent actions.
Installs just this skill. Get the whole plugin for auto-invocation.
⚡ How it fires
How this skill gets triggered: by you, by Claude, or both.
Fires itselfClaude auto-loads it when your prompt matches the work.
You can call itInvoke it directly when you want it.
Slash command/protect-mcp-setup
👁️ Context preview
The summary Claude sees to decide when to auto-load this skill.
Configure Cedar policy enforcement and Ed25519 signed receipts for Claude Code tool calls. Use when setting up projects that need cryptographic audit trails, policy-gated tool execution, or compliance-ready evidence of agent actions.
📊 Stats
Stars38,171
Forks4,092
LanguagePython
LicenseMIT
📦 Ships with wshobson-agents
</> SKILL.md
protect-mcp-setup.SKILL.md
---name: protect-mcp-setup
description: Configure Cedar policy enforcement and Ed25519 signed receipts for Claude Code tool calls. Use when setting up projects that need cryptographic audit trails, policy-gated tool execution, or compliance-ready evidence of agent actions.
---# protect-mcp — Policy Enforcement + Signed Receipts
Cryptographic governance for every Claude Code tool call. Each invocation is
evaluated against a Cedar policy and produces an Ed25519-signed receipt that
anyone can verify offline.
## Overview
Claude Code runs powerful tools: `Bash`, `Edit`, `Write`, `WebFetch`. By default
there is no audit trail, no policy enforcement, and no way to prove what was
decided after the fact. `protect-mcp` closes all three gaps:
- **Cedar policies** (AWS's open authorization engine) evaluate every tool call
before execution. Cedar deny is authoritative.
- **Ed25519 receipts** record each decision with its inputs, the policy that
governed it, and the outcome. Receipts are hash-chained.
- **Offline verification** via `npx @veritasacta/verify`. No server, no account,
no trust in the operator.
## Problem
AI agents make decisions that affect money, safety, and rights. The Claude Code
session log records what happened, but the log is:
