claude

protect-mcp

Cedar policy enforcement + Ed25519 signed receipts for every Claude Code tool call. Calls are policy-gated before they run, and every call that runs gets a hash-chained receipt verifiable offline. Claude Code only.

0 on GitHubby Tom Farleyv0.2.0MITupdated 11 days agogovernance
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Plugin protect-mcp from marketplace claude-code-workflows in shotcowboystyle/ag-skills. Commands read from the repo's manifest — 11 days ago.

This plugin runs code on your machine — its hooks fire automatically on events like tool use. The exact commands are listed below; read them before installing.

What it installs

Skills (1)

  • protect-mcp-setup

    Configure Cedar policy enforcement and Ed25519 signed receipts for Claude Code tool calls. Use when setting up projects that need a signed audit trail, policy-gated tool execution, or evidence of which tools an agent ran.

Slash commands (2)

  • /protect-mcp:audit-chain

    Verify every receipt and chain link in ./receipts/receipts.jsonl against the signer's public key. Detects tampered, malformed, deleted, or reordered receipts.

  • /protect-mcp:verify-receipt

    Verify a single Ed25519-signed receipt file against the signer's public key. Returns exit 0 if valid, 1 if tampered or the key is wrong, 2 if malformed or the key is missing.

Subagents (2)

  • policy-enforcer

    Cedar policy author and reviewer for Claude Code tool calls. Writes, audits, and explains Cedar policies that govern Bash, Edit, Write, WebFetch, and other tools. Use when you need declarative, formally verifiable rules for what an AI agent can and cannot do in a project.

  • receipt-verifier

    Verifies protect-mcp Ed25519 signed receipts and receipt chains offline, and explains why verification failed. Use when you need to check receipt authenticity, audit a receipts file, or detect tampering.

Hooks (2)

  • PreToolUse

    "${CLAUDE_PLUGIN_ROOT}"/hooks/evaluate.sh

  • PostToolUse

    "${CLAUDE_PLUGIN_ROOT}"/hooks/sign.sh

View source on GitHub veritasacta.com

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