OpenTag connects Slack with coding agents running on a computer controlled by the user, so channel mentions can queue work and return status, decisions, and evidence in the same thread. It is for engineering teams that want to run agents such as Claude Code, Codex, or Cursor against local checkouts through the Agent Client Protocol.
Borrowing it
Nothing to install: this file belongs to amplifthq/opentag. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/amplifthq/opentag/main/.claude/settings.jsongit clone --depth 1 https://github.com/amplifthq/opentagWrote 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/amplifthq/opentag/pre-tool-use)<a href="https://agentmods.dev/hooks/amplifthq/opentag/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/amplifthq/opentag/pre-tool-use/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/hooks/amplifthq/opentag/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/amplifthq/opentag/pre-tool-use.svg" alt="Reviewed on agentmods" width="80" 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 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.
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.
What it actually says
{
"PreToolUse": [
{
"matcher": "Bash",
"hooks": [
{
"type": "command",
"command": "node \"$CLAUDE_PROJECT_DIR/scripts/agents/claude-bash-guard.mjs\"",
"timeout": 10
}
]
}
]
}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.
- yesterday First seen · 14 lines scan A 3a680197abb3
PreToolUse is a hook published in the GitHub repository amplifthq/opentag (0 stars, last pushed yesterday), 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 2026-10-15.
Other hooks, from other repositories
Stop
Runs when the agent finishes a response, running python3. From sandbox-quantum/switch.
StopFailure
Runs on the StopFailure event, running an inline shell check. From microsoft/intelligent-terminal.
SessionStart
Runs when a session starts, executing session-registry-start.sh, parked-resume-check.sh and wip-check.sh via bash (3 commands). From Habitat-Thinking/ai-literacy-superpowers.
Stop
Runs when the agent finishes a response, running python3. From dbc-oduffy/coordinator-claude.
SessionStart
Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.
PostToolUse
Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.