Question: Is there a platform that provides a full dev environment in seconds and allows for code, build, test, and pull requests from any repository?

If you want a platform that can give you a full dev environment in a few seconds and let you write, build, test and open pull requests from any repository, GitHub is a great option. It's got GitHub Codespaces for a full dev environment, GitHub Actions for automated build, test and deploy pipelines, and GitHub Copilot for AI-assisted coding help. On top of that, it's got features like GitHub Advanced Security for code scanning and Dependabot for managing dependencies, so it's a good option for developers at any level.

Another good option is Replit, which offers a cloud-based development and deployment environment that needs no setup or downloads. It offers instant environments for forking and running big codebases, collaboration tools for online and offline work, and AI code generation for project architecture and debugging. Replit also offers deployment options with no complicated setup, so you can get on with coding.

If you need a high-performance, customizable cloud dev environment, RunCode could be for you. It offers instant setup and lets you code in the browser directly without installation. RunCode supports a broad range of programming languages and integrates with popular frameworks and databases. It offers a secure environment with passcode-protected workspaces and flexible collaboration tools, so it's good for developers who need portability and flexibility.