hooks_codemod · Ruflo MCP: Risk & Policy

WHAT IT DOES

What hooks_codemod does on Ruflo

AI agents invoke hooks_codemod to trigger actions in Ruflo. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why hooks_codemod needs a policy

This tool applies automated code transformations directly to source files using the TypeScript compiler. It modifies code in-place (var-to-const, remove-console, add-logging), constituting a write/execute action that alters source code. While the transforms are described as deterministic, the blast radius is high because an AI agent could misuse this to systematically alter codebases.

From the tool's definition Apply a deterministic, $0 (no-LLM) code transform — the real Tier-1 execution path (ADR-143). Uses the TypeScript compiler with formatting-preserving edits. Targets: raw

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

hooks_codemod Rate-limited

hooks_codemod stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "hooks_codemod": {
      "limits": [
        {
          "counter": "hooks_codemod_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Ruflo, so you can run agents against it safely.

FAQ

Questions about hooks_codemod

What does the hooks_codemod tool do? +

Apply a deterministic, $0 (no-LLM) code transform — the real Tier-1 execution path (ADR-143). Supported intents: var-to-const, remove-console, add-logging. Uses the TypeScript compiler with formatting-preserving edits (comments/whitespace survive). Targets: raw. It is categorised as a Execute tool in the Ruflo MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on hooks_codemod? +

Register the Ruflo MCP server in PolicyLayer and add a rule for hooks_codemod: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Ruflo. Nothing to install.

What risk level is hooks_codemod? +

hooks_codemod is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit hooks_codemod? +

Yes. Add a rate_limit block to the hooks_codemod rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block hooks_codemod completely? +

Set action: deny in the PolicyLayer policy for hooks_codemod. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides hooks_codemod? +

hooks_codemod is provided by the Ruflo MCP server (ruvnet/ruflo). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.