📎 Backport devenv improvements

scripts/attach-opencode

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+set -e;
+
+PORT=14180
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --port|-p) PORT="$2"; shift 2 ;;
+    *) echo "Unknown option: $1"; exit 1 ;;
+  esac
+done
+
+pnpm exec opencode attach "http://localhost:${PORT}";