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/zaxbyhub/opencode-swarm/pre-tool-usegit clone --depth 1 https://github.com/ZaxbyHub/opencode-swarmWrote 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/zaxbyhub/opencode-swarm/pre-tool-use)<a href="https://agentmods.dev/hooks/zaxbyhub/opencode-swarm/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/zaxbyhub/opencode-swarm/pre-tool-use.svg" alt="Measured on agentmods" height="20"></a>Grade A, and why
PreToolUse 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 4d 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.
How it starts
The opening of the file, as written. The whole thing — 22 lines — stays where its author put it; the contents beside it link to each section on GitHub.
{
"PreToolUse": [
{
"matcher": "Bash",
"hooks": [
{
"type": "command",
"command": "_GG=\"$(dirname \"$(git rev-parse --git-common-dir 2>/dev/null || echo .)\")/graphify-out/graph.json\"; [ -f \"$_GG\" ] || exit 0; if python3 -c \"\" 2>/dev/null; then _GPY=python3; else _GPY=python; fi; HIT=$(\"$_GPY\" -c \"import json,sys,re;d=json.load(sys.stdin);c=str(d.get('tool_input',d).get('command','') or '');sys.stdout.write('1' if re.search(r'(?:^|[\\\\s;&|(])(?:grep|egrep|fgrep|rg|ripgrep|find|fd|ack|ag)\\\\b',c) else '')\" 2>/dev/null || true); if [ \"$HIT\" = 1 ]; then echo \"{\\\"hookSpecificOutput\\\": {\\\"hookEventName\\\": \\\"PreToolUse\\\", \\\"additionalContext\\\": \\\"MANDATORY: the primary graphify knowledge graph exists. Run graphify query \\\\\\\"<question>\\\\\\\" --graph \\\\\\\"\\$(dirname \\\\\\\"\\$(git rev-parse --git-common-dir)\\\\\\\")/graphify-out/graph.json\\\\\\\" before grepping raw files. Always pass --graph: inside a linked worktree the relative path does not resolve. Only grep after graphify has oriented you, or to modify/debug specific lines.\\\"}}\"; fi"
}
]
},
{
"matcher": "Read|Glob",
"hooks": [
{
"type": "command",
"command": "_GG=\"$(dirname \"$(git rev-parse --git-common-dir 2>/dev/null || echo .)\")/graphify-out/graph.json\"; [ -f \"$_GG\" ] || exit 0; if python3 -c \"\" 2>/dev/null; then _GPY=python3; else _GPY=python; fi; HIT=$(\"$_GPY\" -c \"import json,sys,os;d=json.load(sys.stdin);t=d.get('tool_input',d);s=(str(t.get('file_path') or '')+' '+str(t.get('pattern') or '')+' '+str(t.get('path') or '')).replace(chr(92),'/');exts=('.py','.js','.ts','.tsx','.jsx','.go','.rs','.java','.rb','.c','.h','.cpp','.hpp','.cc','.cs','.kt','.swift','.php','.scala','.lua','.sh','.md','.rst','.txt','.mdx');skip={'claude.md','agents.md','skill.md','readme.md'};ex=lambda x:[x[:x.index('{')]+a+x[x.index('}')+1:] for a in x[x.index('{')+1:x.index(What else settings.json configures
This page is one entry in a file that holds 2. 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.
- 4d ago First seen · 22 lines scan A 9da0b3895b96
PreToolUse is a hook published in the GitHub repository ZaxbyHub/opencode-swarm (462 stars, last pushed today), 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 2026-08-30.
Other hooks, from other repositories
PreToolUse
Runs before the agent uses a tool for Bash and Read tool calls, executing auto-approve.sh (2 commands). From h0x91b/dev-3.0.
PreToolUse
Runs before the agent uses a tool for Bash tool calls, executing no-full-test-builds.sh. From macanderson/stella.
UserPromptSubmit
Runs when you submit a prompt, before the agent sees it, running an inline shell check. From coleam00/Archon.
PreToolUse
Runs before the agent uses a tool for Bash tool calls, running an inline shell check. From roboticforce/sugar.
BeforeTool
Runs on the BeforeTool event for write_file, replace, run_shell_command and shell tool calls, executing before-tool.js via node. From richardcb/oh-my-gemini.
SessionStart
Runs when a session starts, running "/path/to/shipworthy/hooks/session-start". From Vimalk0703/shipworthy.