feat(hook): block grep tool and guide to safe-grep

src/index.ts

@@ -96,6 +96,10 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
     },
 
     "tool.execute.before": async (input, _output) => {
+      if (input.tool === "grep") {
+        throw new Error(`[BLOCKED] grep has no timeout and can freeze the system. It is permanently disabled. Use 'safe-grep' instead.`)
+      }
+
       if (input.sessionID === mainSessionID) {
         updateTerminalTitle({
           sessionId: input.sessionID,