Session resume · for Claude Code and Codex

Close the laptop. Carry on from another one.

The gateway keeps a copy of each conversation that passes through it, and one command turns that copy into a native Claude Code or Codex session on any machine. The client's own resume command then opens it, so you can stop on one laptop and carry on from another, or switch clients mid-task.

command to move a session

clients, Claude Code and Codex

200

latest messages kept per session

15 min

before the command expires

Connect your agent → Read the docs

Key facts

What it is: A Context Mode Gateway feature that rebuilds a conversation as a native session file.
Who it is for: Developers who move between machines, or between Claude Code and Codex.
Clients: Claude Code and Codex.
Measured result: Not a cost feature, and not measured on its own. For the gateway as a whole, see Benchmarks.
Limits: It brings back message text, tool names and a summary before the latest 200 messages. The command expires after 15 minutes.

Their resume reads your disk, and ours reads the gateway.

Claude Code saves sessions under ~/.claude/projects, Codex under ~/.codex/sessions. On a new laptop or a remote dev box, or after the file is deleted, there is nothing to resume.

claude --resumesessions saved on this computer, opens in Claude Code

codex resumesessions saved on this computer, opens in Codex

Claude Code in the clouda session that runs in the cloud is on every device from the start, and --teleport pulls it into a terminal; Claude Code only

Context Modesessions saved at the gateway, opens in either client, on any machine with Node.js and curl, for sessions that ran on your own machines

Pick the workspace, paste one line.

01 saveEach request through the gateway adds its new messages to the copy.

02 pickIn the console, open Sessions and click Open in Claude Code or Open in Codex.

03 pasteRun the command in the project folder. It writes the client's own session file.

04 continueThe client opens it with its own resume command.

Start in Claude Code and finish in Codex.

A conversation held in one client opens in the other. The command carries a token that expires after 15 minutes and reads only your own account's workspaces.

What comes back

Message text for the latest 200 messages of each session, and a summary of older ones. Tool calls show by name, without their output. Full list →

FAQ

Can I start in Claude Code and finish in Codex?

Yes. The copy belongs to the workspace, whichever client wrote it.

Does resume bring back every tool output?

No. It brings back message text, tool names and a summary before the latest 200 messages.

Is the command safe to paste in a shared channel?

No. Until it expires after 15 minutes, anyone who has it can read that conversation.

Your conversation, on the next machine.

npx @context-mode/cli points Claude Code and Codex at the gateway. Saving starts with the next request.

Connect your agent → How resume works →