It catches voice or style problems immediately after a file changes, so faulty edits can be noticed before they are treated as complete.

PostToolUse — Hook for Claude Code by AgriciDaniel/anti-slop

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.

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

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 ↓

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.

README.md

[![agentmods](https://agentmods.dev/badge/hooks/agricidaniel/anti-slop/post-tool-use/github.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/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.

Your own site · 80×15

<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="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 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 2mo 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.

2mo 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 (67 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 Code agent-skills ai-slop citation-verification code-quality writing-quality

PostToolUse next to 6 hooks from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
PostToolUseAgriciDaniel/anti-slop	Hook	67	1mo ago	Apache-2.0	A	—	Claude Code
PostToolUsesupabase/supabase	Hook	115k	yesterday	Apache-2.0	A	—	Claude Code
SessionStartsupabase/supabase	Hook	115k	yesterday	Apache-2.0	A	—	Claude Code
SessionStartgoogle-gemini/gemini-cli	Hook	109k	yesterday	Apache-2.0	A	—	Claude Code
PreToolUseapache/superset	Hook	75k	yesterday	Apache-2.0	A	—	Claude Code
PreToolUseanthropics/claude-cookbooks	Hook	54k	2d ago	MIT	A	—	Claude Code
PostToolUseanthropics/claude-plugins-official	Hook	46k	yesterday	Apache-2.0	A	—	Claude Code