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/nikiforovall/claude-code-rules/post-tool-usegit clone --depth 1 https://github.com/NikiforovAll/claude-code-rulesGrade 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 2d 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.
- 2d ago First seen · 14 lines scan A 3783b2fc60b7
PostToolUse is a hook published in the GitHub repository NikiforovAll/claude-code-rules (141 stars, last pushed 4d 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
SessionStart
Runs when a session starts, executing rule.sh via sh. From smk-labs/claude-plugins.
PostToolUse
Runs after a tool call finishes for Write, Write and Edit tool calls, executing backlink-scratch-notes.ts and auto-compile-index.ts via bun (2 commands). From shck-dev/ccx-context-system.
Stop
Runs when the agent finishes a response, executing state-freshness-guard.ts via bun. From shck-dev/ccx-context-system.
SessionStart
Runs when a session starts, executing preflight.mjs via node. From lukaskellerstein/claude-my-marketplace.
PreToolUse
Runs before the agent uses a tool for Bash tool calls, executing gh_write_blocker.py. From and3r817/dot-claude-plugins.
PostToolUse
Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.