npx claudepluginhub utakatakyosui/c2lab --plugin jj-vcs-workflowDefined in hooks/hooks.json
{
"PreToolUse": [
{
"hooks": [
{
"type": "command",
"command": "\"$CLAUDE_PLUGIN_ROOT\"/hooks/scripts/jj-safe-push.sh"
}
],
"matcher": "Bash"
}
]
}"Runs a Node.js script before Bash tool calls using PreToolUse hook with Bash matcher. Enables blocking or modifying Bash executions. 5s timeout, no file writes."