chore: claude code status line 에 정확한 컨텍스트 윈도우 사이즈 표시되도록 개선

Author: kubrickcode

.claude/statusline.sh

@@ -3,9 +3,31 @@
 input=$(cat)
 
 model_display_name=$(echo "$input" | jq -r '.model.display_name')
-total_cost_usd=$(echo "$input" | jq -r '.cost.total_cost_usd // 0')
 output_style=$(echo "$input" | jq -r '.output_style.name // "default"')
 
-cost_formatted=$(printf "%.4f" "$total_cost_usd" 2>/dev/null || echo "$total_cost_usd")
+# Context window usage
+context_size=$(echo "$input" | jq -r '.context_window.context_window_size // 0')
+current_usage=$(echo "$input" | jq '.context_window.current_usage')
 
-printf "Model: \033[36m%s\033[0m | Output: \033[35m%s\033[0m | Cost: \033[32m\$%s\033[0m USD" "$model_display_name" "$output_style" "$cost_formatted"
+if [ "$current_usage" != "null" ] && [ "$context_size" -gt 0 ] 2>/dev/null; then
+    input_tokens=$(echo "$current_usage" | jq -r '.input_tokens // 0')
+    cache_creation=$(echo "$current_usage" | jq -r '.cache_creation_input_tokens // 0')
+    cache_read=$(echo "$current_usage" | jq -r '.cache_read_input_tokens // 0')
+
+    used_tokens=$((input_tokens + cache_creation + cache_read))
+    context_pct=$(awk "BEGIN {printf \"%.1f\", ($used_tokens / $context_size) * 100}")
+
+    # Color by usage level
+    if (( $(echo "$context_pct >= 80" | bc -l) )); then
+        context_color="\033[31m"  # red
+    elif (( $(echo "$context_pct >= 50" | bc -l) )); then
+        context_color="\033[33m"  # yellow
+    else
+        context_color="\033[32m"  # green
+    fi
+else
+    context_pct="--"
+    context_color="\033[90m"  # gray
+fi
+
+printf "Model: \033[36m%s\033[0m | Output: \033[35m%s\033[0m | Context: ${context_color}%s%%\033[0m" "$model_display_name" "$output_style" "$context_pct"