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/let-sunny/canicode/pre-tool-usegit clone --depth 1 https://github.com/let-sunny/canicodeWrote 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/let-sunny/canicode/pre-tool-use)<a href="https://agentmods.dev/hooks/let-sunny/canicode/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/let-sunny/canicode/pre-tool-use.svg" alt="Measured on agentmods" height="20"></a>Grade C, and why
PreToolUse 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 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.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
"command": "CMD=$(echo \"$TOOL_INPUT\" | head -1); if echo \"$CMD\" | grep -qE '^\\s*rm\\s+.*-[a-zA-Z]*r[a-zA-Z]*f|^\\s*rm\\s+.*-[a-zA-Z]*f[a-zA-Z]*r'; then echo 'BLOCKED: rm -rf'; exit 2; fi; if echo \"$CMD\" | grep -qE What it actually says
{
"PreToolUse": [
{
"matcher": "Bash",
"hooks": [
{
"type": "command",
"command": "CMD=$(echo \"$TOOL_INPUT\" | head -1); if echo \"$CMD\" | grep -qE '^\\s*rm\\s+.*-[a-zA-Z]*r[a-zA-Z]*f|^\\s*rm\\s+.*-[a-zA-Z]*f[a-zA-Z]*r'; then echo 'BLOCKED: rm -rf'; exit 2; fi; if echo \"$CMD\" | grep -qE '^\\s*git\\s+push\\s+.*--force|^\\s*git\\s+push\\s+-f'; then echo 'BLOCKED: git push --force'; exit 2; fi; if echo \"$CMD\" | grep -qE '^\\s*git\\s+reset\\s+--hard'; then echo 'BLOCKED: git reset --hard'; exit 2; fi; if echo \"$CMD\" | grep -qE '^\\s*git\\s+clean\\s+.*-[a-zA-Z]*f'; then echo 'BLOCKED: git clean -f'; exit 2; fi; if echo \"$CMD\" | grep -qE '^\\s*(npm|pnpm)\\s+publish'; then echo 'BLOCKED: npm/pnpm publish (CI only, see ADR-007)'; exit 2; fi"
}
]
}
]
}What else settings.json configures
This page is one entry in a file that holds 4. 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 · 13 lines scan C 9e701cfee3ad
PreToolUse is a hook published in the GitHub repository let-sunny/canicode (10 stars, last pushed 2mo ago), licensed MIT. 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 (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other hooks, from other repositories
PostToolUse
Runs after a tool call finishes for Edit, Write and MultiEdit tool calls, executing format-on-edit.mjs via node. From awdr74100/figwright.
PostToolUse
Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.
SessionStart
Runs when a session starts, executing on-start.js via node. From google-gemini/gemini-cli.
SessionStart
Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.
PreToolUse
Runs before the agent uses a tool for Bash tool calls, running an inline shell check. From apache/superset.
PreToolUse
Runs before the agent uses a tool, executing pre-write.sh and pre-bash.sh (2 commands). From anthropics/claude-cookbooks.