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.
npx agentmods add hooks/black-coffe/vulyk/post-tool-usegit clone --depth 1 https://github.com/Black-coffe/vulykWrote 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.
[](https://agentmods.dev/hooks/black-coffe/vulyk/post-tool-use)<a href="https://agentmods.dev/hooks/black-coffe/vulyk/post-tool-use"><img src="https://agentmods.dev/badge/hooks/black-coffe/vulyk/post-tool-use.svg" alt="Measured on agentmods" height="20"></a>Grade A, and why
PostToolUse 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.
What it actually says
{
"PostToolUse": [
{
"matcher": "Skill",
"hooks": [
{
"type": "command",
"command": "$CLAUDE_PROJECT_DIR/.claude/hooks/skill-usage-counter.sh"
}
]
}
]
}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.
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.
- 3d ago First seen · 13 lines scan A 2fe31d663cd8
PostToolUse is a hook published in the GitHub repository Black-coffe/vulyk (2 stars, last pushed 13d ago), licensed MIT. 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 2026-08-31.
Other hooks, from other repositories
PreToolUse
Runs before the agent uses a tool for Edit, Write, MultiEdit, NotebookEdit and Bash tool calls, executing deny-edit.mjs via node. From muzafferkadir/nextjs-loop-engineering-starter.
SubagentStop
Runs when a subagent finishes, executing hooks.py via python3. From shanraisshan/shanraisshan.
Stop
Runs when the agent finishes a response, executing hooks.py via python3. From shanraisshan/codex-cli-best-practice.
SessionEnd
Runs when a session ends, executing sessionend_release.py. From compforge/devloop.
UserPromptSubmit
Runs when you submit a prompt, before the agent sees it, running an inline shell check (4 commands). From EchoingVesper/mcp-task-orchestrator.
PostToolUse
Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.