refactor(packages): extract utils package

packages/utils/src/extract-semver.ts

@@ -0,0 +1,9 @@
+export function extractSemverFromOutput(output: string): string | null {
+  const trimmed = output.trim()
+  if (!trimmed) return null
+  // The negative lookbehind `(?<![\d:])` prevents matching the milliseconds segment of timestamps
+  // like `00:24:25.202` that the Electron-based OpenCode binary leaks into stdout.
+  const semverPattern = /(?<![\d:])v?(\d+\.\d+\.\d+(?:[-+][\w.]+)*)/
+  const match = trimmed.match(semverPattern)
+  return match?.[1] ?? null
+}