refactor: rename Tool.alpha to Tool.experimental

.claude/hooks/auto-tmux-dev.js

@@ -0,0 +1,13 @@
+const fs = require("node:fs");
+const input = JSON.parse(fs.readFileSync("/dev/stdin", "utf8"));
+const cmd = input.tool_input?.command || "";
+
+const devPattern = /\b(pnpm|npm|yarn|bun)\s+(run\s+)?dev\b/;
+
+if (devPattern.test(cmd) && !/tmux/.test(cmd) && !/&\s*$/.test(cmd)) {
+  console.log(
+    "TIP: Dev servers block the session. Consider running in tmux instead:\n" +
+      `  tmux new-session -d -s stirling-dev '${cmd}'\n` +
+      "Or append & to background the process.",
+  );
+}