[FEATURE] Add shortcut to start new Claude chat with selected region attached (Cursor)

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

When using the Claude Code plugin in Cursor, it’s common to want to spin up a fresh chat and immediately include the currently selected code/text region as context.

Right now, the flow is a bit clunky compared to native Cursor features:
• In Cursor’s native chat, there’s effectively a quick way to start a new chat and attach selection (e.g., Cmd+Shift+L behavior / “send selection to new chat” flow).
• A similar “new chat + attach selection” flow exists conceptually as: open new chat (Cmd+N), then attach selection (Opt+K) — but it requires multiple steps and doesn’t exist as a single shortcut for the Claude plugin.

Proposed Solution

Add a single keyboard shortcut in the Claude Code plugin that:

1. Creates a new chat window/session, and
2. Attaches the currently selected region (code/text) to that chat automatically (as context/quote/snippet).

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

Interactive mode (TUI)

Use Case Example

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Additional Context

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