Cloudflare released Forge, an open source tool that automatically generates SDKs, CLIs, API documentation, and other developer artifacts from API specifications. The company built it to handle its own 3,500+ API operations across multiple languages and teams, then open sourced it because they believe API tooling should be freely available to everyone.

• Forge runs in CI on individual team repos and generates preview builds for each change, letting developers test modifications before they ship, similar to how preview deployments work for web apps.
• The tool supports chaining transformers—you can generate outputs from other outputs and control the order yourself, so a Python shop can generate a Python CLI instead of being forced into whatever the generator decided.
• Forge handles the messy reality of real APIs: it lets you feed handwritten CLI commands and custom behaviors back into documentation, solving a problem existing generators don't address.
• Cloudflare plans to use Forge for a new v5 API versioning strategy that won't break existing clients on the decade-old v4 API.