Move AI chats across harnesses: Claude Code, Codex, OpenCode, Cursor, and more

Skillsynchq released txcript, an open-source library and CLI that converts AI coding-agent sessions between harnesses including Claude Code, Codex, OpenCode, and Cursor, carrying over messages, reasoning, and tool history where the target supports them. The tool ships as a Rust crate (requiring Rust 1.96 or newer), a JavaScript package with prebuilt WebAssembly for Node and Bun, and downloadable binaries for macOS, Linux, and Windows, and it also exposes a read-only MCP server via `txcript mcp` for listing, searching, and reading past sessions. txcript preserves the source session while writing a new native session and launching the target agent in the recorded working directory.

Continue your conversation in another coding agent. English | 日本語 https://github.com/skillsynchq/txcript/blob/main/docs/translations/README.ja.md | 简体中文 https://github.com/skillsynchq/txcript/blob/main/docs/translations/README.zh-CN.md | 繁體中文 https://github.com/skillsynchq/txcript/blob/main/docs/translations/README.zh-TW.md | 한국어 https://github.com/skillsynchq/txcript/blob/main/docs/translations/README.ko.md | Deutsch https://github.com/skillsynchq/txcript/blob/main/docs/translations/README.de.md | Español https://github.com/skillsynchq/txcript/blob/main/docs/translations/README.es.md | Français https://github.com/skillsynchq/txcript/blob/main/docs/translations/README.fr.md | Italiano https://github.com/skillsynchq/txcript/blob/main/docs/translations/README.it.md | Português Brasil https://github.com/skillsynchq/txcript/blob/main/docs/translations/README.pt-BR.md | Русский https://github.com/skillsynchq/txcript/blob/main/docs/translations/README.ru.md | मराठी https://github.com/skillsynchq/txcript/blob/main/docs/translations/README.mr.md | தமிழ் https://github.com/skillsynchq/txcript/blob/main/docs/translations/README.ta.md txcript is a library for converting agent sessions. Start a conversation in Claude Code and continue it in Codex, carrying over messages, reasoning, and tool history where the target supports them. Build session search, viewers, and editors against one transcript model. txcript handles the agent-specific formats, with a Rust API, a JavaScript package, and a CLI. Try the CLI try-the-cli · Use the library use-the-library · Supported agents supported-agents · Documentation documentation Download a binary for macOS, Linux, or Windows from Releases https://github.com/skillsynchq/txcript/releases , or install from source with Rust 1.96 or newer: cargo install --git https://github.com/skillsynchq/txcript txcript-cli --locked Find a Claude Code session and continue it in Codex: txcript list --from claude code txcript continue <session-id --with codex Use an ID from the list; an unambiguous prefix works too. txcript writes a new native session and launches Codex in the recorded working directory. The source session is kept. Have the target agent installed and signed in before continuing. Other ways to work with your sessions: txcript query "relay bug" search local session history txcript view <session-id read a conversation in the terminal txcript crop <session-id edit or trim history into a new copy txcript export <session-id --out run.json Move run.json to another machine and continue it with txcript continue ./run.json --with claude code . Bring the project files separately. Run txcript mcp to let an MCP client list, search, and read past sessions. Its tools are read-only. See the CLI reference https://github.com/skillsynchq/txcript/blob/main/docs/usage.md cli for filters, message ranges, and shell integration. cargo add txcript Convert a Claude Code transcript into Codex's native format: use txcript::harness::{claude code::ClaudeCode, codex::Codex}; use txcript::{TextCodec, convert}; fn main - Result< , Box<dyn std::error::Error { let input = std::fs::read to string "session.jsonl" ?; let source = ClaudeCode::from text &input ?; let target = convert::<ClaudeCode, Codex &source ?; std::fs::write "rollout.jsonl", Codex::to text &target ? ?; Ok } Use Store implementations to discover, load, and save sessions in an agent's own storage. Convert to Transcript<Common to search, crop, or render conversations through the same API across agents. See the Rust API https://docs.rs/txcript and examples https://github.com/skillsynchq/txcript/blob/main/docs/usage.md rust-crate . npm install txcript js import { convert } from "txcript"; import { readFileSync, writeFileSync } from "node:fs"; const input = readFileSync "session.jsonl", "utf8" ; const output = convert input, "claude code", "codex" ; writeFileSync "rollout.jsonl", output ; The package includes prebuilt WebAssembly for Node and Bun. It converts and searches session text in memory; your application handles files and storage. See the JavaScript reference https://github.com/skillsynchq/txcript/blob/main/docs/usage.md npm-package . Each name links to its format documentation. Use the ID with --from and --with . | Agent | ID | Read from | Continue into | |---|---|---|---| | Claude Code https://github.com/skillsynchq/txcript/blob/main/docs/formats/claude-code.md | claude code | Yes | Yes | | Codex https://github.com/skillsynchq/txcript/blob/main/docs/formats/codex.md | codex | Yes | Yes | | OpenCode https://github.com/skillsynchq/txcript/blob/main/docs/formats/opencode.md | opencode | Yes | Yes | | Cursor CLI https://github.com/skillsynchq/txcript/blob/main/docs/formats/cursor.md | cursor | Yes | Yes | | Cursor desktop https://github.com/skillsynchq/txcript/blob/main/docs/formats/cursor-desktop.md | cursor desktop | Yes | Yes | | pi https://github.com/skillsynchq/txcript/blob/main/docs/formats/pi.md | pi | Yes | Yes | | Campfire https://github.com/skillsynchq/txcript/blob/main/docs/formats/campfire.md | campfire | Yes | Yes | | Cowork https://github.com/skillsynchq/txcript/blob/main/docs/formats/cowork.md | cowork | Yes | Yes | | Grok CLI https://github.com/skillsynchq/txcript/blob/main/docs/formats/grok.md | grok | Yes | Yes | | Grok Bot https://github.com/skillsynchq/txcript/blob/main/docs/formats/grok-bot.md | grok bot | Yes | Via local gateway | | fx https://github.com/skillsynchq/txcript/blob/main/docs/formats/fx.md | fx | Yes | Yes | | Antigravity https://github.com/skillsynchq/txcript/blob/main/docs/formats/antigravity.md | antigravity | Yes | Yes | | Hermes Agent https://github.com/skillsynchq/txcript/blob/main/docs/formats/hermes.md | hermes | Yes | No | | Amp https://github.com/skillsynchq/txcript/blob/main/docs/formats/amp.md | amp | Yes | No | | Claude Chat https://github.com/skillsynchq/txcript/blob/main/docs/formats/claude-chat.md | claude chat | Live account | No | | ChatGPT https://github.com/skillsynchq/txcript/blob/main/docs/formats/chatgpt.md | chatgpt | Live account | No | Local discovery skips the live accounts. Select --from claude chat or --from chatgpt explicitly to read them. These sources use private web APIs and reuse an existing app login; requirements and limitations are in their linked docs. An agent without a native adapter can emit Simple https://github.com/skillsynchq/txcript/blob/main/docs/formats/simple.md , txcript's interchange JSON. Save a document like this as run.json : { "messages": { "role": "user", "content": "Find why the tests fail." }, { "role": "assistant", "content": "The test clock is using local time." } } txcript continue ./run.json --with claude code Simple also represents reasoning, tool calls, results, images, and metadata. It is the format txcript export writes. The common model represents messages, reasoning, tool calls and results, images, metadata, and token usage. What survives conversion depends on what the source records and the destination can represent. Agent-specific records and unsupported fields can be lost. Conversion carries conversation history. The destination supplies its own system instructions and tools, and project files must be available separately. Native load/save and conversion have different preservation guarantees; see each format's caveats https://github.com/skillsynchq/txcript/blob/main/docs/formats/README.md . - CLI reference https://github.com/skillsynchq/txcript/blob/main/docs/usage.md cli : commands, search, cropping, MCP, and shell integration. - Rust API https://docs.rs/txcript and JavaScript reference https://github.com/skillsynchq/txcript/blob/main/docs/usage.md npm-package . - Transcript formats https://github.com/skillsynchq/txcript/blob/main/docs/formats/README.md : storage layouts, mappings, and limitations, with sources and reverse-engineering notes. - Development https://github.com/skillsynchq/txcript/blob/main/docs/usage.md development and test guide https://github.com/skillsynchq/txcript/blob/main/tests/README.md . - Contributing https://github.com/skillsynchq/txcript/blob/main/CONTRIBUTING.md · Report a security vulnerability https://github.com/skillsynchq/txcript/blob/main/SECURITY.md . - Changelog https://github.com/skillsynchq/txcript/blob/main/CHANGELOG.md · Report an issue https://github.com/skillsynchq/txcript/issues .