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.
/plugin marketplace add NikiforovAll/claude-code-rules/plugin install dotnet-csharpierWrote 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/nikiforovall/claude-code-rules/post-tool-use)<a href="https://agentmods.dev/hooks/nikiforovall/claude-code-rules/post-tool-use"><img src="https://agentmods.dev/badge/hooks/nikiforovall/claude-code-rules/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.
<a href="https://agentmods.dev/hooks/nikiforovall/claude-code-rules/post-tool-use"><img src="https://agentmods.dev/badge/hooks/nikiforovall/claude-code-rules/post-tool-use.svg" alt="Reviewed on agentmods" width="80" 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 1mo 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.
Copies of this mod
4 near-identical copies found in the catalogue:
- PostToolUse — 86% identical, 3 lines differ
- PostToolUse — 86% identical, 3 lines differ
- PostToolUse — 78% identical, 4 lines differ
- PostToolUse — 78% identical, 4 lines differ
What it actually says
{
"PostToolUse": [
{
"matcher": "Write|Edit",
"hooks": [
{
"type": "command",
"command": "bash \"${CLAUDE_PLUGIN_ROOT}/hooks/format-csharp.sh\"",
"timeout": 30
}
]
}
]
}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.
- 1mo ago First seen · 14 lines scan A 3783b2fc60b7
PostToolUse is a hook published in the GitHub repository NikiforovAll/claude-code-rules (142 stars, last pushed 25d 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 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other hooks, from other repositories
PostToolUse
Runs after a tool call finishes for mcp__demo-playwright__browser_stop_video, mcp__demo-elevenlabs__text_to_speech, Write and Edit tool calls, executing postprocess-clip.mjs, probe-audio.mjs and validate-artifacts.mjs via node (3 commands). From lukaskellerstein/claude-my-marketplace.
SessionStart
Runs when a session starts, executing preflight.mjs via node. From lukaskellerstein/claude-my-marketplace.
PostToolUse
Runs after a tool call finishes for Write, Edit, str_replace_editor, Write, Edit and str_replace_editor tool calls, running an inline shell check (2 commands). From tony-stark-eth/php-lsp-docker-claude-code.
PreToolUse
Runs before the agent uses a tool for Bash tool calls, running an inline shell check. From tony-stark-eth/php-lsp-docker-claude-code.
SessionStart
Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.
PostToolUse
Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.