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1d76ba5ebe
This PR adds an option to app server to allow conversation summaries to be fetched from just the conversation id rather than rollout path for convenience at the cost of some latency to discover the rollout path. This convenience is non-trivial as it allows app servers to simply maintain conversation ids rather than rollout paths and the associated platform (Windows) handling associated with storing and encoding them correctly.
1d76ba5ebe
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2025-10-28 20:17:22 -04:00
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codex-app-server
codex app-server is the harness Codex uses to power rich interfaces such as the Codex VS Code extension. The message schema is currently unstable, but those who wish to build experimental UIs on top of Codex may find it valuable.
Protocol
Similar to MCP, codex app-server supports bidirectional communication, streaming JSONL over stdio. The protocol is JSON-RPC 2.0, though the "jsonrpc":"2.0" header is omitted.
Message Schema
Currently, you can dump a TypeScript version of the schema using codex generate-ts. It is specific to the version of Codex you used to run generate-ts, so the two are guaranteed to be compatible.
codex generate-ts --out DIR