agentmods.dev

PreToolUse

An automatic action that runs before selected coding-agent tools are used, including agents, tasks, worktrees, teams, planning, and messages. It starts orchestration scripts that can prepare or check those operations.

In plain words
What is it for?
It helps prepare agent and task calls, manage worktree and team operations, and handle planning and communication tools.
Why use it?
It lets the plugin apply setup and model or workflow decisions before an operation begins.

Hook

694 +1 3mo ago A scan tokens not measured copy · 73% Apache-2.0
View the source file hellowind777/hello2cc
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add hooks/hellowind777/hello2cc/pre-tool-use
Clone the repo
git clone --depth 1 https://github.com/hellowind777/hello2cc
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. Scan, not verified.
Origin 73% 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 2d 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

73% identical to SessionStart — 126 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.

hooks/hooks.json · 144 lines

How it starts

The opening of the file, as written. The whole thing — 144 lines — stays where its author put it; the contents beside it link to each section on GitHub.

{
  "PreToolUse": [
    {
      "matcher": "Agent",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/orchestrator.mjs\" pre-agent-model",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "Task",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/orchestrator.mjs\" pre-agent-model",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "EnterWorktree",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/orchestrator.mjs\" pre-enter-worktree",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "TeamCreate",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/orchestrator.mjs\" pre-team-create",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "TeamDelete",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/orchestrator.mjs\" pre-team-delete",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "TaskCreate",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/orchestrator.mjs\" pre-task-create",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "TaskList",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/orchestrator.mjs\" pre-task-list",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "TaskGet",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/orchestrator.mjs\" pre-task-get",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "TaskUpdate",
      "hooks": [
        {
          "type": "command",

Read the full file on GitHub · 144 lines

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. 2d ago First seen · 144 lines scan A 2abb62398d24

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository hellowind777/hello2cc (694 stars, last pushed 3mo 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 73% identical to SessionStart, differing in 126 lines, and is treated as a copy.

Related

Other hooks, from other repositories

PostToolUse

Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.

supabase/supabase · not measured

SessionStart

Runs when a session starts, executing on-start.js via node. From google-gemini/gemini-cli.

google-gemini/gemini-cli · not measured

SessionStart

Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.

supabase/supabase · not measured

PreToolUse

Runs before the agent uses a tool for Bash tool calls, running an inline shell check. From apache/superset.

apache/superset · not measured

PreToolUse

Runs before the agent uses a tool, executing pre-write.sh and pre-bash.sh (2 commands). From anthropics/claude-cookbooks.

anthropics/claude-cookbooks · not measured

SessionStart

Runs when a session starts, executing session-start.sh. From anthropics/claude-cookbooks.

anthropics/claude-cookbooks · not measured