[BUG] Status bar shows different token count than /context command (22k vs 24k)

Found 3 possible duplicate issues:

1. https://github.com/anthropics/claude-code/issues/19316
2. https://github.com/anthropics/claude-code/issues/18400
3. https://github.com/anthropics/claude-code/issues/18241

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🤖 Generated with Claude Code

Closing as duplicate of #19316 - same issue (status bar vs /context showing different token counts)

Root Cause Found & Solution

After debugging the statusline API, I discovered the issue:

Problem

context_window.total_input_tokens is cumulative - it sums ALL input tokens sent during the entire session, not the current context window usage.

This causes custom status bars to show inflated values that grow continuously (e.g., 241k/200k = 120%) while /context shows the correct 32k/200k.

Available Fields

{
  "total_input_tokens": 217556,      // ❌ CUMULATIVE - grows with each turn
  "total_output_tokens": 32345,      // ❌ CUMULATIVE
  "context_window_size": 200000,
  "used_percentage": 27,             // ✅ CORRECT - actual context usage
  "remaining_percentage": 73
}

Fix for Custom Statuslines

Before (wrong):

total=$(echo "$input" | jq ".context_window.total_input_tokens")
used_pct=$((total * 100 / 200000))

After (correct):

used_pct=$(echo "$input" | jq ".context_window.used_percentage")
ctx_size=$(echo "$input" | jq ".context_window.context_window_size")
total_k=$(( (ctx_size * used_pct) / 100000 ))

This now matches /context output exactly.

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