Feature request: Session portability across machines

Problem

Claude Code conversation history is stored locally in ~/.claude/ and cannot be transferred to another machine. This means when switching between computers (e.g., home and work), users lose all conversation context and history.

For a CLI tool, this is an unexpected limitation — CLI tools are generally expected to be more portable, not less.

Current workarounds

• CLAUDE.md files can carry project context, but not the actual conversation history
• claude --resume only works on the same machine
• There is no --export / --import mechanism for sessions

Proposed solution

Any of the following would help:

1. Export/import commands — claude --export <session_id> > session.json and claude --import session.json
2. Session sync — Optional cloud sync of conversation history (like claude.ai already does for web)
3. Portable session files — Store session data in the project directory (opt-in), so it travels with the project

Use case

Users who work on the same project from multiple machines (desktop + laptop, home + office) and want to continue conversations seamlessly.