Expose session rate limit usage and reset time in statusLine JSON input

Feature Request

Problem

The statusLine command receives JSON input via stdin with useful fields like context_window.used_percentage, cost, workspace, etc. However, it does not include session rate limit usage or reset time — the same info shown by the /usage command.

Users who want to display their rate limit status (session usage % and time until reset) in the status bar currently cannot do so because this data isn't available in the statusline JSON input.

Current statusLine JSON fields (example)

{
  "session_id": "...",
  "model": { "id": "claude-opus-4-6", "display_name": "Opus 4.6" },
  "workspace": { "current_dir": "..." },
  "cost": { "total_cost_usd": 0.80 },
  "context_window": {
    "used_percentage": 12,
    "remaining_percentage": 88,
    "context_window_size": 200000
  }
}

Requested addition

Please include session/rate limit information in the statusLine JSON input, for example:

{
  "rate_limit": {
    "used_percentage": 45,
    "remaining_percentage": 55,
    "reset_time_iso": "2026-02-07T15:30:00Z",
    "reset_in_seconds": 7200
  }
}

Use case

This would allow users to build custom status bars that show at a glance:

• How much of their session rate limit has been used
• When the rate limit will reset
• Combined with context window usage, giving full visibility into session health

Currently, the only way to check this is by manually running /usage, which interrupts workflow.

Environment

• Claude Code version: 2.1.34
• Plan: Pro