Configure human-in-the-loop gating for AI agent review actions in Claude Code. Use when setting up a project where an agent may post PR reviews, comments, merges, or edit CI configuration, and you want a cryptographically auditable approval trail with Cedar-enforced gates.

review agent governance — Setup Gate AI agent review actions (PR reviews, comments, merges, CI edits) behind explicit human approval. Every attempt, approved or denied, produces an Ed25519 signed receipt. When to use this plugin Install it in projects where a Claude Code agent: Reviews, comments on, or merges pull requests ( gh pr review , gh pr merge ) Triages issues ( gh issue comment , gh issue close ) Publishes releases ( gh release create ) Modifies CI configuration ( .github/workflows/ , .gitlab ci.yml ) Pushes to protected branches ( main , master , release , production ) Posts to external notification surfaces (Slack webhooks, Discord), once you add a rule for the command that posts (the default policy does not gate them) If the agent is only doing local file edits and running tests, this plugin is overkill. Use protect mcp for general tool call policy enforcement and skip this one. One time setup 1. Install the plugin 2. Copy the default policy to your project You can edit this file to match your project's specific rules. See ../agents/review policy author.md for guidance on authoring review policies. 3. Create a receipts directory and sign key protect mcp 0.7.4 sign does not create the key, so the last command creates it, and it never replaces an existing key. Without a key, the receipts are unsigned. To rotate the key, archive ./review governance.key and ./review receipts/receipts.jsonl first, then run the command again. Give auditors the publicKey value from ./review governance.key . Do not commit the file, because it also holds the private key. Per session workflow The Cedar policy denies review surface actions unconditionally. To approve a specific action, open an approval window before it and close it after. Flag file (simplest) Slash command (from within Claude Code) This creates ./.review approved with the given reason embedded as a note, and records the reason in an unsigned approval log under ./review receipts/approvals/ . A follow up rm is still needed to close the window. Dry run everything (force full policy evaluation) If you want every tool call to go through Cedar with no approval bypass: Any tool call matching a forbid rule will be denied; approved windows have no effect. Useful for CI or for a locked down audit run. Verifying the receipts List all receipts: Verify every receipt offline with the public key: Exit 0 means every receipt verified. Exit 1 means a receipt failed verification, because it was tampered with, the key is wrong, or a line is malformed. Exit 2 means the receipts file could not be read. A denied call never runs, so it has no receipt. To see what the policy blocked, run this inside Claude Code: It lists the tool calls that the PreToolUse hook blocked in the current session, with the tool name and the command or path. Example: approving a PR review The allowed call has a signed receipt that anyone with the public key can verify offline. The denied attempt has no receipt, and the approval log is not signed, so keep both in mind when you show the trail to an auditor. Composing with protect mcp If both plugins are installed, each plugin's hooks/hooks.json registers its own PreToolUse hook, and Claude Code runs both on every tool call: Each evaluate.sh reads tool name and tool input from the hook payload on stdin (Claude Code sets no TOOL NAME variable) and evaluates its own policy: ./protect.cedar for protect mcp and ./review governance.cedar here. Both hooks must pass for the tool call to proceed. Cedar deny in either policy blocks it. Standards Ed25519 — RFC 8032 (digital signatures) JCS — RFC 8785 (deterministic JSON canonicalization) Cedar — AWS's open authorization policy language IETF draft — [draft farley acta signed receipts](https://datatracker.ietf.org/doc/draft farley acta signed receipts/)

review-agent-setup