Runner: open-source local orchestrator lets Claude Code and Codex agents team up
jason3gb · reddit · 2026-08-29
A developer open-sourced Runner, a local-first agent orchestrator where multiple agents work on one project from different angles and talk to each other — cross-provider agent collaboration is still an empty space. The author's hands-on take: Claude is far stronger than Codex on design work in pen.dev; Fable 5 excels at specs and planning; Codex (GPT-5.6 fast mode) is the most reliable and fastest for coding on personal subscriptions.
Key features:
- Multi-runtime: Claude Code and Codex in the same crew, communicating.
- Each agent runs in a real PTY with its own TUI as the interface.
- MCP self-drive: Runner is itself an MCP server, so an agent you're chatting with can assemble a crew and start a mission.
- Agent and crew templates for predefined roles and conventions.
- Split-screen and side-panel tabs.
Tech stack: gpui-ce (Zed's GPUI, Metal GPU rendering, no webview/JS), portable-pty, tokio, SQLite plus append-only NDJSON event log, rmcp 1.7 as MCP server. GPL-3.0, macOS Apple Silicon. Repo: github.com/yicheng47/runner.
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