agent-signals

052. The first screens on Windows match the Linux screens

View as Markdown Open in Claude Open in ChatGPT
Date
2026-10-30
Agents
none named
Measured on
CI runner windows-2022 (x64), CI runner windows-2025 (x64) and CI runner windows-11-arm (arm64)

Measured

2026-10-30, the scenario scenarios/first-run-windows.py in the scenarios workflow (run 41146500448, and again in run 41145363320), with the agents and versions of fact 51, a pseudo console of 120 x 40, a throwaway profile, no login and no key. The screen after 20 s was compared with the Linux screens of facts 29, 30 and 46.

Measured on: CI runner windows-2022 (x64), CI runner windows-2025 (x64) and CI runner windows-11-arm (arm64).

What was measured

  1. These agents showed the same first question as on Linux, with the same words and options, on the three images:
    • Claude Code 2.1.314: "Welcome to Claude Code v2.1.314", "Let's get started." and "Choose the text style that looks best with your terminal", with "> √ Dark mode" selected (fact 29).
    • Codex CLI 0.166.0: "Choose how you want to use Codex." with "1. Sign in with ChatGPT" to "4. Use Amazon Bedrock" (fact 29).
    • Cursor CLI: "Cursor Agent", "v2026.10.22-27dcf5f" and "Press any key to log in..." (fact 29).
    • Copilot CLI 1.0.105: "Confirm folder trust" with "❯ 1. Yes", "2. Yes, and remember this folder for future sessions" and "3. No (Esc)" (fact 30).
    • Gemini CLI 0.66.0: "Do you trust the files in this folder?" with "● 1. Trust folder (example)", "2. Trust parent folder (work)" and "3. Don't trust" (fact 30).
    • Amp: "No API key found. Starting login flow..." and "Would you like to log in to Amp? [(y)es, (n)o]:" (x64 only, fact 46).
    • Crush: "To start, let's choose a provider and model." and "> Find your fave" (fact 46).
    • Kimi Code CLI 2.4.1: "Trust this folder?" with "❯ Trust and continue" and "Exit" (fact 46).
    • Continue CLI 1.5.47: "To get started, enter your Anthropic API key." (fact 46).
    • Factory Droid 1.0.0: "Welcome to Factory CLI", "Please login with your Factory account to continue." and "> Login" (run 41145363320, fact 46).
    • Cline CLI 3.0.74: "Welcome to Cline", "Connect a model provider to get started." and four boxes from "Sign in with Cline" to "Bring your own provider" (fact 46).
    • Kilo Code CLI 7.8.18: the input box "Ask anything..." and "Code · Auto Free Kilo Gateway" (fact 46).
    • Auggie 0.36.0: "New to Augment? You can create an account from the login page." and "→ Login to continue" (fact 46).
    • opencode 1.19.5: the input box "Ask anything…" and "/update to upgrade to OpenCode 2.0" (fact 29).
  2. Qwen Code 0.26.4 showed a box "Connect a Provider" with "› QwenCloud" and "Alibaba ModelStudio". Fact 30 gives other words ("Choose a built-in provider and connect with an API key"). The Linux version of fact 30 was not compared.
  3. Differences between the Windows images:
    • On windows-2022 only, Gemini CLI added "⚠ Warning: Windows 10 detected. Some UI features like smooth scrolling may be degraded. Windows 11 is recommended for ...". Windows Server 2022 has the build number 20348.
    • Kimi Code CLI, Kilo Code CLI and opencode show the work folder as a Windows path, for example D:\a\_temp\run.<id>\work\example on x64 and C:\a\_temp\... on arm64.
    • On windows-11-arm, Amp printed "This version of C:\npm\prefix\node_modules@ampcode\cli\bin\amp.exe is not compatible with the version of Windows you're running." and exited (fact 48).

Mechanism

These agents draw with the same code on Windows and on Linux. ConPTY sends the screen as VT output, which the driver reads as tmux reads a pane. A reader of the screens of facts 29, 30 and 46 can read the Windows screens too, with these exceptions: Windows paths in the screen, and the Gemini warning on Windows Server 2022.

Incident

None.

Screens

None. The screens are in the logs of the runs, not in the corpus.

Not measured