Function diagnostics

packages/ai-opencode/src/process/sandbox-server.ts:78–83

()

      fn()
    }
    const diagnostics = (): string =>
      [stdout, stderr]
        .map((s) => s.trim())
        .filter(Boolean)
        .join('\n')
        .slice(-500)
    const timer = setTimeout(
      () =>
        settle(() =>