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mcp-runtime: Hook for Claude Code

.claude/settings.json

PreToolUse is a hook for Claude Code from Agent-Hellboy/mcp-runtime. Its token cost is not measured, scanned A, a copy of PreToolUse, Apache-2.0.

A pre-tool hook that watches for Bash searches using commands such as rg, grep, find, or fd. When a local knowledge graph exists, it tells the agent to query that graph for focused questions.

In plain words
What is it for?
Use it in an agent environment with graphify output to redirect focused file-search questions to graphify query and reserve the broad report for wider architecture context.
Why use it?
It helps the agent use a prepared knowledge graph instead of searching raw files when that graph is available. The input does not describe any behavior when the graph is missing beyond doing nothing.

Hook for Claude Code

Written for Claude Code: PreToolUse hook event.

This is Agent-Hellboy/mcp-runtime's own configuration. It tells Claude Code how to work on mcp-runtime itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp-runtime configures →

One of 2 entries in settings.json upstream. Installing this one merges just its entry into your config; the other 1 are separate, each on its own page.

not rated 6repo 1mo ago A scan tokens not measured copy · 100% Apache-2.0
View source ↗ Agent-Hellboy/mcp-runtime
Reuse

Borrowing it

Nothing to install: this file belongs to Agent-Hellboy/mcp-runtime. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/Agent-Hellboy/mcp-runtime/main/.claude/settings.json
Clone the repo
git clone --depth 1 https://github.com/Agent-Hellboy/mcp-runtime

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for PreToolUse

README.md
[![agentmods](https://agentmods.dev/badge/hooks/agent-hellboy/mcp-runtime/pre-tool-use/github.svg)](https://agentmods.dev/hooks/agent-hellboy/mcp-runtime/pre-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/agent-hellboy/mcp-runtime/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/agent-hellboy/mcp-runtime/pre-tool-use/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for PreToolUse

Your own site · 80×15
<a href="https://agentmods.dev/hooks/agent-hellboy/mcp-runtime/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/agent-hellboy/mcp-runtime/pre-tool-use.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod in the catalogue.
Security

Grade A, and why

PreToolUse scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the commands this hook runs, not an audit. A hook is shell that executes on your machine at the event it names, which is why every command in it is printed with what was found.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to PreToolUse — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/settings.json · 13 lines

What it actually says

{
  "PreToolUse": [
    {
      "matcher": "Bash",
      "hooks": [
        {
          "type": "command",
          "command": "CMD=$(python3 -c \"import json,sys; d=json.load(sys.stdin); print(d.get('tool_input',d).get('command',''))\" 2>/dev/null || true); case \"$CMD\" in *grep*|*rg\\ *|*ripgrep*|*find\\ *|*fd\\ *|*ack\\ *|*ag\\ *)   [ -f graphify-out/graph.json ] &&   echo '{\"hookSpecificOutput\":{\"hookEventName\":\"PreToolUse\",\"additionalContext\":\"graphify: knowledge graph at graphify-out/. For focused questions, run `graphify query \\\"<question>\\\"` (scoped subgraph, usually much smaller than GRAPH_REPORT.md) instead of grepping raw files. Read GRAPH_REPORT.md only for broad architecture context.\"}}'   || true ;; esac"
        }
      ]
    }
  ]
}
Same file

What else settings.json configures

This page is one entry in a file that holds 2. Installing the file brings all of them; each is measured and scanned on its own page.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 13 lines scan A d3e312433602

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository Agent-Hellboy/mcp-runtime (6 stars, last pushed 1mo ago), licensed Apache-2.0. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it A with 0 findings. It is 100% identical to PreToolUse, differing in 0 lines, and is treated as a copy.

Memory and contextmcpmcp-deploymentmcp-gatewaymcp-platformmcp-runtimemcp-tools
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