Description

This PR adds support for Modal Sandboxes into the VibeKit project. It exposes a Modal Sandbox provider option to users via the generalizable SandboxProvider class.

I created aModalSandboxProvider class and a ModalSandboxInstance implementation, with a new library and SDK folder setup in /packages/modal.

Due to Modal sandboxes not requiring any explicit program setups in scripts, and instead uses a CLI setup, I've included comments in both the code and docs that point users to conduct this setup. Note one uses the Modal Python SDK to do this profile setup (which is done via environment variables), but uses the Modal Javascript SDK in the backend of VibeKit.

Dependency Updates

• Added modal in package.json for Modal Sandbox integration.

Codebase Updates

• Added packages/modal folder containing implementation of ModalSandboxProvider and ModalSandboxInstance in src/index.ts.
• Added Modal to packages/sdk/src/constants/providers.ts
• Added ModalConfig types to packages/sdk/src/index.ts and packages/sdk/src/types.ts
• Added Modal example to packages/sdk/README.md
• Added Modal to docs in docs/supported-sandboxes/modal.mdx and docs/api-reference/configuration.mdx
• Added Modal example to LLM.md
• Added testing script to test/modal.test.ts

Checklist

• I tested my changes
• I reviewed my own code