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/aspenkit/aspens/post-tool-usegit clone --depth 1 https://github.com/aspenkit/aspensGrade 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.
This is a copy
47% identical to SessionStart — 8 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
{
"PostToolUse": [
{
"matcher": "Edit|MultiEdit|Write",
"hooks": [
{
"type": "command",
"command": "\"$CLAUDE_PROJECT_DIR/.claude/hooks/post-tool-use-tracker.sh\""
}
]
}
]
}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 · 13 lines scan A f7bfe85ef96e
PostToolUse is a hook published in the GitHub repository aspenkit/aspens (96 stars, last pushed 17d 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. It is 47% identical to SessionStart, differing in 8 lines, and is treated as a copy.
Other hooks, from other repositories
SessionStart
Runs when a session starts on startup, running an inline shell check. From nicholasglazer/gnosis-mcp.
PreToolUse
Runs before the agent uses a tool for Edit tool calls, running echo 'REMINDER: Did you Read this file in the current contex. From kaltura/kaltura-agents-api-guides.
Stop
Runs when the agent finishes a response, executing stop_nudge.py via python3. From jx-hxxx/hi-vibe.
PreToolUse
Runs before the agent uses a tool for Bash, Bash, Write, Edit and MultiEdit tool calls, executing dispatch.py and before_write.py via python3 (2 commands). From WangChangxin0809/repo-agent-harness.
SessionStart
Runs when a session starts, executing session_brief.py via python3. From bestcow/dear-agent.
SessionStart
Runs when a session starts, executing inject-instructions.mjs via node. From geml-spec/geml.