Support Vertex AI

[simonz4031]

Add support for Google Cloud Vertex AI API

This PR adds support for using the Google Cloud Vertex AI API as a provider in Claude Dev. Users can now interact with Claude models hosted on Google Cloud Vertex AI.

Key changes:

• Added VertexHandler class to handle API requests to Vertex AI
• Updated ApiProvider type to include "vertex" option
• Added Vertex AI configuration options in ApiHandlerOptions
• Implemented Vertex AI model information and default model ID
• Updated UI components to include Vertex AI provider and model options

New files:

• src/api/vertex.ts: Implements the VertexHandler class

Modified files:

• src/api/index.ts: Added Vertex handler to buildApiHandler function
• src/shared/api.ts: Added Vertex-related types and configurations
• webview-ui/src/components/ApiOptions.tsx: Added UI elements for Vertex AI configuration
• webview-ui/src/components/SettingsView.tsx: Updated version display

Testing:

• Tested Vertex AI integration with sample project
• Verified UI changes for Vertex AI configuration

Notes:

• Users will need to provide their Google Cloud Project ID, Region, and Access Token to use the Vertex AI integration
• Default region is set to "us-east5" but can be changed by the user

[fry69]

I am not the maintainer or otherwise affiliated with Claude Dev, but I see two obvious issues:

• your pull request is not rebased on the current main branch, it basically replaces the whole repository with your version (with 221 commits)
• there is already a pull request that implements Vertex AI support for Claude Dev, see here -> https://github.com/saoudrizwan/claude-dev/pull/45 how is your version different or better?

Update after looking a bit deeper into both implementations: They seem to be very similar in principle (using the same libraries to authenticate and talk to Vertex AI), but the implementation by @u-minor is more elaborate/secure IMHO, allowing to use Service Account credentials for authentication instead of using the global access token (which potentially gives full access to the main GCP account).

[simonz4031]

I am not the maintainer or otherwise affiliated with Claude Dev, but I see two obvious issues:

• your pull request is not rebased on the current main branch, it basically replaces the whole repository with your version (with 221 commits)
• there is already a pull request that implements Vertex AI support for Claude Dev, see here -> Add Vertex AI support #45 how is your version different or better?

Update after looking a bit deeper into both implementations: They seem to be very similar in principle (using the same libraries to authenticate and talk to Vertex AI), but the implementation by @u-minor is more elaborate/secure IMHO, allowing to use Service Account credentials for authentication instead of using the global access token (which potentially gives full access to the main GCP account). Thank you for highlighting the security concern. I'm currently utilizing Google's free 90-day credit offer for this project. In the long term, I believe Anthropic's prompt cache would be more suitable than the Vertex AI solution.

Regarding the pull request (PR), it was actually generated by the extension itself. I must admit my knowledge of TypeScript is limited. When time permits, I plan to update the PR, focusing on rebasing and addressing other minor issues I've identified.

I appreciate your feedback and will work on implementing these improvements to enhance the project's security and functionality.

[shimr0d]

Can we agree that the PR of @u-minor is the one we should follow ?