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PostToolUse

PostToolUse is a hook for Claude Code from AgriciDaniel/anti-slop. Its token cost is not measured, scanned A, original, Apache-2.0.

An automated after-edit hook that runs a voice-linting script when files are written or edited. It is configured for Write and Edit tool calls and uses Python to report lint failures.

In plain words
What is it for?
Use it in an agent workflow that needs automatic prose checks after file edits, provided the referenced lint script and plugin path are available.
Why use it?
It catches voice or style problems immediately after a file changes, so faulty edits can be noticed before they are treated as complete.

Hook for Claude Code

Written for Claude Code: PostToolUse hook event.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the anti-slop plugin — 5 skills, 2 agents, 1 hook shipped together

not rated 45repo +1 1mo ago A scan tokens not measured original Apache-2.0

Good fit Use it in an agent workflow that needs automatic prose checks after file edits, provided the referenced lint script and plugin path are available.

Compare 6 hooks from other repositories ↓
View source ↗ AgriciDaniel/anti-slop skool.com
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add AgriciDaniel/anti-slop
Claude Code
/plugin install anti-slop

Made for: Claude Code.

Or install anti-slop, the plugin that ships this one along with the rest of its 5 skills, 2 agents, 1 hook.

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 PostToolUse

README.md
[![agentmods](https://agentmods.dev/badge/hooks/agricidaniel/anti-slop/post-tool-use.svg)](https://agentmods.dev/hooks/agricidaniel/anti-slop/post-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/agricidaniel/anti-slop/post-tool-use"><img src="https://agentmods.dev/badge/hooks/agricidaniel/anti-slop/post-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 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

PostToolUse 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 7d 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

"command": "python3 -c \"import json,os,subprocess,sys; d=json.load(sys.stdin); p=(d.get('tool_input') or {}).get('file_path') or ''; s=os.path.join(os.environ.get('CLAUDE_PLUGIN_ROOT',''),'..','anti-slop-brain','scripts
anti-slop-plugin/hooks/hooks.json · 14 lines

What it actually says

{
  "PostToolUse": [
    {
      "matcher": "Write|Edit",
      "hooks": [
        {
          "type": "command",
          "command": "python3 -c \"import json,os,subprocess,sys; d=json.load(sys.stdin); p=(d.get('tool_input') or {}).get('file_path') or ''; s=os.path.join(os.environ.get('CLAUDE_PLUGIN_ROOT',''),'..','anti-slop-brain','scripts','lint_voice.py'); r=(subprocess.run([sys.executable,s,p],capture_output=True,text=True) if (p and os.path.isfile(p) and os.path.isfile(s)) else None); bad=bool(r) and r.returncode!=0; sys.stderr.write((r.stdout+r.stderr) if bad else ''); sys.exit(2 if bad else 0)\"",
          "timeout": 15
        }
      ]
    }
  ]
}
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. 7d ago First seen · 14 lines scan A 1b937e457754

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository AgriciDaniel/anti-slop (45 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 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Claude Codeagent-skillsai-slopcitation-verificationcode-qualitydeveloper-tools
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 on startup, executing install_pkgs.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

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

PreCompact

Runs before the context is compacted for manual and auto tool calls, executing hook-handler.cjs via node (4 commands). From ruvnet/RuView.

ruvnet/RuView · not measured