Convert AI coding sessions between Claude Code, Codex, OpenCode, Zed, Aider, Gemini CLI, Cursor, Cline & more — lossless, round-trip tested. MCP server + CLI.
Convert any coding-agent session to any other. One command. Keep going where you left off.
A passed transcript kept 14/17 concrete facts. A hand-written handoff summary kept 3/17. Benchmark ↓
It's 4 p.m. Claude Code says "usage limit reached — resets at 10 p.m." You're three hours into a session: architecture decided, edge cases mapped, half the diff written.
❌ Without baton — open another agent and start from zero. Re-explain the plan. Re-read the files. Re-litigate every decision you already made.
✅ With baton — pass the session and keep going:
Works in every direction: switch agents mid-task, try a second opinion on a hard bug, move a session from your editor agent to a terminal agent, or archive everything in one format.
Agent Read Write Auto-import ---:---::---::---: Claude Code ✅ ✅ — OpenCode ✅ ✅ ✅ opencode import Codex CLI ✅ ✅ — Gemini CLI ✅ ✅ — Zed ✅ ✅ — Aider ✅ ✅ — Cursor ✅¹ —² — Continue ✅ — — Cline / Roo ✅ —² —
¹ Cursor reads from exported JSON (sqlite3 state.vscdb "SELECT value FROM ItemTable WHERE key='aiService:chats'")
² Not planned: Cursor and Cline keep session state inside editor databases (SQLite / VS Code globalState) with no file-level import path.
Does carrying the full transcript beat writing a handoff summary for the next agent? We measured both on a real 3.4 MB Claude Code session (same model both arms, only the context differs):
session size baton transcript handoff summary ------:---: sm (93 KB) 3/3 details recalled 1/3 md (198 KB) 6/6 1/6 lg (599 KB) 5/8 1/8 total 14/17 3/17
From the project README.
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