Feature Request: Add token usage/context budget to status line JSON input

Feature Request

Summary

Add token usage and remaining context information to the JSON input provided to status line scripts.

Current Behavior

The status line JSON input currently includes:

• Model information (id, display_name)
• Working directory (current_dir, project_dir)
• Cost metrics (total_cost_usd, duration, lines added/removed)
• Session details

Requested Feature

Add fields for:

• Current token usage - Total tokens used in the current session
• Remaining context - Tokens remaining until auto-compact
• Context limit - Maximum context window for the current model
• Token budget - Percentage of context used

Use Case

Users want to monitor their context usage in real-time via the status line to:

1. Know when they are approaching auto-compact
2. Manage their conversation context more effectively
3. Make informed decisions about when to start a new session

Suggested JSON Fields

Workaround

Currently, token information is only available through OpenTelemetry metrics export, which requires external monitoring infrastructure and is not suitable for real-time status line display.

Related

This would complement the existing cost tracking features and provide users with better visibility into their session state.