Feature request: Register Claude Code as a VSCode Chat Participant

Problem

VSCode's built-in features (e.g. Simple Browser's "Send to Chat" button, and potentially future extensions) route content to the default Chat Participant — currently hardwired to GitHub Copilot. Claude Code runs as a standalone sidebar panel and does not register as a VSCode Chat Participant, so it can't receive these events.

Request

Register Claude Code as a VSCode Chat Participant (via vscode.chat.createChatParticipant API), so that:

• It appears in the chat participant dropdown
• VSCode features like "Send to Chat" can route to it
• It can be set as the default (if/when Microsoft adds that config)

References

• VSCode Chat Participant API: https://code.visualstudio.com/api/extension-guides/ai/chat
• VSCode issue requesting configurable default participant: https://github.com/microsoft/vscode/issues/240499