Status line input JSON missing effort_level field

Summary

The status line input JSON does not include the current effort level, making it impossible for custom status line scripts to display the active effort setting — especially when changed mid-session via /effort.

Current behavior

The JSON piped to the status line command includes session_id, model, context_window, rate_limits, cost, etc. but no effort level field.

The only workaround is reading effortLevel from ~/.claude/settings.json, which only reflects the persisted default — not session-level changes from /effort.

Expected behavior

The status line input JSON should include an effort_level field (e.g., "effort_level": "max") that reflects the current session's effort level, including changes made via /effort.

Steps to reproduce

1. Configure a custom status line script that dumps the input JSON:

``bash
input=$(cat)
echo "$input" > /tmp/claude_statusline_debug.json
``

1. Send a message in Claude Code
2. Inspect /tmp/claude_statusline_debug.json — no effort-related field exists

Dumped JSON (redacted)

{
  "session_id": "...",
  "model": { "id": "claude-opus-4-6[1m]", "display_name": "Opus 4.6 (1M context)" },
  "cost": { "total_cost_usd": 0.52 },
  "context_window": { "used_percentage": 3 },
  "rate_limits": { ... }
  // no effort_level field
}

Environment

• Claude Code v2.1.92
• macOS (Darwin 24.6.0)
• Model: Opus 4.6 (1M context)