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PreToolUse

PreToolUse is a hook for Claude Code from BaseInfinity/claude-sdlc-harness. Its token cost is not measured, scanned A, original, no licence file.

A pre-tool check for an AI coding agent. It runs checks before the agent writes, edits, or executes shell commands.

In plain words
What is it for?
Use it in a software-development workflow where write, edit, and shell-command actions should pass automated checks first.
Why use it?
It can catch problems before changes are made and applies checks related to test-driven development (TDD), coding rules, and merging changes.

Hook for Claude Code

Part of the sdlc-wizard plugin — 3 skills, 1 command, 6 hooks shipped together

One of 7 entries in settings.json — they are configured in one file and arrive together.

not rated 46 +1 7d ago A scan tokens not measured no licence
View the source file BaseInfinity/claude-sdlc-harness
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/baseinfinity/claude-sdlc-harness/pre-tool-use
Clone the repo
git clone --depth 1 https://github.com/BaseInfinity/claude-sdlc-harness

Made for: Claude Code.

Or install sdlc-wizard, the plugin that ships this one along with the rest of its 3 skills, 1 command, 6 hooks.

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/baseinfinity/claude-sdlc-harness/pre-tool-use.svg)](https://agentmods.dev/hooks/baseinfinity/claude-sdlc-harness/pre-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/baseinfinity/claude-sdlc-harness/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/baseinfinity/claude-sdlc-harness/pre-tool-use.svg" alt="Measured on agentmods" 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. Scan, not verified.
Origin unknown No closer match found 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 3d 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.

.claude/settings.json · 27 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

Same file

What else settings.json configures

This page is one entry in a file that holds 7. 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. 3d ago First seen · 27 lines scan A e2ce5da0033a

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository BaseInfinity/claude-sdlc-harness (46 stars, last pushed 7d 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 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Git and workflowTestingai-agentanthropicclaude-aiclaude-codecode-qualitydeveloper-tools
Related

Other hooks, from other repositories

PreToolUse

Runs before the agent uses a tool for Bash, Edit and Write tool calls, executing block-dangerous.py via python3. From claude-code-expert/example.

claude-code-expert/example · not measured

TeammateIdle

Runs on the TeammateIdle event, running an inline shell check. From christopherlouet/claude-base.

christopherlouet/claude-base · not measured

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