Resume conversations

What the button does

It starts a new PowerShell in the folder the agent ran in and types claude --resume <id> or codex resume <id> at the prompt, visibly. The text above the button says exactly that before you click. Nothing runs until you click.

Which conversation

Claude Code's own record for the agent process in that tab is used, so two agents in one folder each get their own, and it follows /clear. For Codex it is the conversation started in that folder after the agent started, or the id the tab itself resumed. If SplitNest cannot be sure, Resume opens the agent's own list of earlier conversations instead of guessing.

What is saved

The agent, the conversation id and the folder, with the tab. Never conversation text. Also the conversation's title (Claude Code's own name for it, or the session title an agent reports), shown above the button. Titles are on by default (Settings → Workspaces → Show conversation titles for Resume); a title can contain words from your prompt, and turning the setting off removes the saved ones.

No setup

No hooks or agent settings are installed or changed. If the agent does not start within 25 seconds, the terminal says so and stays usable. Settings → Workspaces → Resume agents automatically when the app opens is off by default.

Limits

• WSL tabs: Windows cannot see their processes, so SplitNest knows only that Claude Code or Codex ran there, not which conversation. Resume there starts the shell in the workspace folder and opens the agent's own list.
• The agents' session files are undocumented; if a future version changes them, Resume falls back to the agent's list.
• Codex's /new is not followed: the saved conversation stays the one the tab started with.
• If the agent ran in a folder outside the workspace folder, Resume is refused and the terminal offers a plain shell.

Resume in the user guide →