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/evo-hq/evo/subagent-stopgit clone --depth 1 https://github.com/evo-hq/evoGrade C, and why
SubagentStop scanned grade C 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 yesterday.
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.
Encoded or obfuscated payloadhighSupply chain
base64 or hex that is decoded and executed hides what actually runs from anyone reading the file.
"command": "node -e \"eval(Buffer.from('Y29uc3QgZnM9cmVxdWlyZSgnZnMnKSxvcz1yZXF1aXJlKCdvcycpLHBhdGg9cmVxdWlyZSgncGF0aCcpLGNwPXJlcXVpcmUoJ2NoaWxkX3Byb2Nlc3MnKSx0dHk9cmVxdWlyZSgndHR5Jyk7bGV0IGlucHV0PUJ1ZmZlci5hbGxvYygwKTt0 This is a copy
84% identical to PreToolUse — 3 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
{
"SubagentStop": [
{
"hooks": [
{
"type": "command",
"command": "node -e \"eval(Buffer.from('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','base64').toString())\""
}
]
}
]
}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.
- yesterday First seen · 12 lines scan C 0fea2e9db29d
SubagentStop is a hook published in the GitHub repository evo-hq/evo (1,432 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 C with 1 finding (encoded or obfuscated payload). It is 84% identical to PreToolUse, differing in 3 lines, and is treated as a copy.
Other hooks, from other repositories
SubagentStart
Runs when a subagent starts, executing node-hook-runner.sh via bash. From uditgoenka/autoresearch.
SubagentStop
Runs when a subagent finishes for code-reviewer tool calls, executing require-review-verdict.sh via sh. From vmobifystudio/app-dev-team.
SubagentStop
Runs when a subagent finishes, executing collector-hook.js via node. From core0-io/nio.
PreToolUse
Runs before the agent uses a tool for Write and Edit tool calls, executing protect-files.sh via bash. From proyecto26/autoresearch-ai-plugin.
SubagentStop
Runs when a subagent finishes, executing subagent-stop-hook.sh. From theogbrand/yoink.
SubagentStart
Runs when a subagent starts, executing subagent-start-hook.sh. From theogbrand/yoink.