branch-session

Fork a live Claude Code or Codex session into a new tmux session.

5|1|Updated Dec 22, 2025

Search Tags:#workflow #codex #claude #tmux #branch #session

Ready to run

npx skills add https://github.com/buddyh/agent-skills --skill branch-session

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: branch-session
Source: https://github.com/buddyh/agent-skills/tree/main/branch-session
Command: npx skills add https://github.com/buddyh/agent-skills --skill branch-session

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires tmux, claude, and includes scripts (resource) components.

What problem does it solve?

Branch the current Claude Code or Codex session into a new tmux session. Creates a true fork with a new session ID while preserving conversation state. Use when you want to explore an alternative approach without losing your current context.

Core Features & Use Cases

Creates a forked session with a new session ID
Preserves conversation state across forks
Works with Claude Code and Codex environments
Easy to attach to the branched session for continued work

Quick Start

From your working directory, execute the branch-session workflow to create and resume a new branched tmux session.

Frequently Asked Questions about branch-session

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I fork a Claude Code session into a new tmux session?▼

You can fork a Claude Code session into a new tmux session by running the branch-session workflow, which creates a true fork with a new session ID while preserving the original conversation state for parallel work.

Can I branch a Codex session without losing the original conversation context?▼

Yes, you can branch a Codex session without losing context. The workflow creates a forked session with a new ID and preserves the conversation state, allowing you to explore alternatives safely.

Do I need tmux installed to fork a live Claude or Codex session?▼

Yes, tmux is required to fork a live Claude or Codex session. The workflow also requires the claude CLI, detects the host platform, and uses a resume-with-fork mechanism to spawn and attach to the branched session.

What is the best way to explore an alternative approach in Claude Code without losing context?▼

The best way to explore an alternative approach without losing context is to branch the current Claude Code session into a separate tmux session. This preserves your original conversation state while enabling parallel experimentation.

Does branching a session work with both Claude Code and Codex environments?▼

Yes, forking a session into tmux works with both Claude Code and Codex environments. It detects the host platform and uses a resume-with-fork workflow to spawn and attach to the branched session.

How does the resume-with-fork workflow spawn a new branched tmux session?▼

The resume-with-fork workflow detects your host platform and spawns a new tmux session with a unique ID. It preserves the conversation state across the fork, allowing you to attach to the branched session for continued work.