VSCode extension consumes excessive tokens in background

Description

The VSCode extension appears to consume a significant amount of tokens in the background, even without any user interaction.

Steps to Reproduce

1. Open VSCode with Claude Code extension enabled
2. Do nothing (no prompts, no interactions)
3. Observe usage quota increasing significantly

Observed Behavior

• Usage went from 51% to 71% within minutes without any user input
• Simply opening/switching files seems to trigger token consumption
• The <ide_opened_file> context is sent automatically when files are opened

Expected Behavior

The extension should not consume tokens unless the user actively interacts with it.

Environment

• Platform: macOS (Darwin 24.3.0)
• Extension: Claude Code VSCode extension

Impact

This makes the free tier / rate-limited plans nearly unusable as the quota is consumed passively.

Suggested Solutions

• Add an option to disable automatic context sending
• Only send file context when the user explicitly asks a question
• Add a "pause" button to stop background token consumption