Emdash

Emdash, made by Y Combinator W26-backed General Action, is an integrated development environment designed for running coding agents, letting users run agents in parallel, schedule repeat work, preview apps in a built-in browser, and manage prompts, skills, and MCP tools from one place. It offers parallel agent execution in isolated Git worktrees, support for more than 25 coding agents including Claude Code, Codex, Cursor, and Amp, and a built-in browser for app previewing. Emdash includes diff and PR review with CI monitoring, scheduled automation for recurring tasks, remote SSH deployment capabilities, and a file editor with an integrated terminal, available cross-platform on macOS, Windows, and Linux. The project reports more than 1 million downloads and 5,484-plus GitHub stars, with an active changelog and Discord community. Pricing is free and open source, available on GitHub.