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/kouroshez/coding-os/pre-tool-usegit clone --depth 1 https://github.com/kouroshez/coding-osWrote 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/kouroshez/coding-os/pre-tool-use)<a href="https://agentmods.dev/hooks/kouroshez/coding-os/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/kouroshez/coding-os/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 today.
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 — 284 lines — stays where its author put it; the contents beside it link to each section on GitHub.
{
"PreToolUse": [
{
"matcher": "Bash",
"hooks": [
{
"type": "command",
"command": "env COS_AGENT=claude \".claude/hooks/block-secrets.sh\"",
"statusMessage": "🔒 Scanning command for credentials...",
"timeout": 5
},
{
"type": "command",
"command": "env COS_AGENT=claude \".claude/hooks/block-dangerous-commands.sh\"",
"statusMessage": "🛡️ Checking command safety (rm, force-push, reset)...",
"timeout": 5
},
{
"type": "command",
"command": "env COS_AGENT=claude \".claude/hooks/block-uv-heredoc.sh\"",
"statusMessage": "⚠️ Inspecting uv-run heredoc pattern (rule #9)...",
"timeout": 5
},
{
"type": "command",
"command": "env COS_AGENT=claude \".claude/hooks/branch-guard.sh\"",
"statusMessage": "🌳 Enforcing trunk-based workflow (no branches)...",
"timeout": 5
},
{
"type": "command",
"command": "env COS_AGENT=claude \".claude/hooks/enforce-commit-message.sh\"",
"statusMessage": "📝 Validating commit message contract...",
"timeout": 5
},
{
"type": "command",
"command": "env COS_AGENT=claude \".claude/hooks/enforce-task-readiness.sh\"",
"statusMessage": "🎯 Checking the new card declares a pull-state...",
"timeout": 10
},
{
"type": "command",
"command": "env COS_AGENT=claude \".claude/hooks/enforce-verify.sh\"",
"statusMessage": "✅ Verifying suites before task-done...",
"timeout": 10
},
{
"type": "command",
"command": "env COS_AGENT=claude \".claude/hooks/test-governor.sh\"",
"statusMessage": "🧪 Test-governor: dedup/lock/sweep check...",
"timeout": 15
},
{
"type": "command",
"command": "envWhat 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.
- today First seen · 284 lines scan A 4604d228fd9b
PreToolUse is a hook published in the GitHub repository kouroshez/coding-os (6 stars, last pushed 3d 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 2026-09-03.
Other hooks, from other repositories
SessionStart
Runs when a session starts, executing session-start.sh. From HKUDS/LightRAG.
SessionStart
Runs when a session starts, executing world-model-session.js via node. From SaravananJaichandar/world-model-mcp.
PreToolUse
Runs before the agent uses a tool for Bash, Edit, Write, MultiEdit and NotebookEdit tool calls, executing block-npm-publish.sh, block-unsafe-git.sh and block-generated-edit.sh (3 commands). From wlsdks/ontology-atlas.
SessionStart
Runs when a session starts, executing skeptic-suggest.sh via bash. From gambletan/cortex.
Stop
Runs when the agent finishes a response, executing contextdb-memory-hook.py via python3. From mikhailbovt/ContextDB-Codex.
SessionStart
Runs when a session starts, running agent-recall-session-start. From mnardit/agent-recall.