Emdash

Emdash is an open source agentic development environment for running coding agents such as Claude Code and Codex. It is a desktop application for macOS, Windows and Linux, and the vendor describes it as free and backed by Y Combinator. It lets a developer work with any coding agent rather than being tied to one. It is built for developers who want to hand tasks to several agents at once. Issues can be pulled in from Linear, Jira, GitHub, Notion, Asana and other trackers so the agent receives full context. Each task runs in its own Git worktree, which keeps its branch, terminal, conversation and review state together. A built in browser previews local apps and remote previews, and the review view covers diffs, commits, pushes, pull requests and CI checks. Recurring agent runs can be scheduled for jobs such as weekly bug sweeps, and agents can run on other machines over SSH, with setup and teardown scripts that provision local, remote or cloud workspaces. Prompts, skills and MCP tools are managed from the same place. Emdash is free to download and use, and no paid plans are published.