agentmods.dev

PreToolUse

A hook that runs a shell check before the coding agent uses a tool for a Bash command.

In plain words
What is it for?
Use it to run an inline shell check before Bash tool calls.
Why use it?
It can apply a pre-command check before Bash operations run, helping catch or handle issues at that point in the workflow.

Hook for Claude Code

2 29d ago A scan tokens not measured no licence
View the source file shiiman/dotfiles
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/shiiman/dotfiles/pre-tool-use
Clone the repo
git clone --depth 1 https://github.com/shiiman/dotfiles

Made for: Claude Code.

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 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Security

Grade A, and why

PreToolUse scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

"command": "if echo \"$CLAUDE_TOOL_INPUT\" | grep -qE 'curl.*\\s*\\|\\s*sh|wget.*\\s*\\|\\s*sh|curl.*\\s*\\|\\s*bash|wget.*\\s*\\|\\s*bash'; then echo '⛔ リモートスクリプト実行は禁止されています' >&2; exit 2; fi"
.claude/settings.json · 13 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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 · 13 lines scan A 267027f113f6

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository shiiman/dotfiles (2 stars, last pushed 29d ago), with no licence file. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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