Runway Dev lands in Claude Code, Codex and Cursor. Here's what the plugin actually does

What you get, per Runway's docs. The plugin bundles the Runway Dev MCP and seven skills (setup, core API, models, Model Routers, Characters, Recipes, Workflows). The MCP signs in with OAuth and can read your projects, which models each project can call along with their prices and limits, your credit balance, and the details of any failed task. The skills show the agent how to use the official SDKs.

What it doesn't do. Runway's install guide says plainly that the plugin does not generate media. Generations run in your app through the API, with your own RUNWAYML_API_SECRET in the project's environment. The Claude-specific MCP endpoint also can't create new real-time avatar Characters; you make those in the Runway Dev portal. Install is /plugin install runway-api@claude-plugins-official in Claude Code. Runway also runs its own marketplace (runwayml/skills), which may be on a different version than Anthropic's listing.

Our take: this is for teams building generation into a product, for example a product video for every item in a store, which is Runway's own example. For one-off shots it's an API integration helper, not a render button. The price and limit lookups should at least keep agents from choosing a model your plan can't call.