Claude Code statusline: context window, session cost, and real-time 5h/7d plan rate limits via OAuth API

statusline.sh

#!/bin/bash
input=$(cat)

MODEL=$(echo "$input" | jq -r '.model.display_name')
PCT=$(echo "$input" | jq -r '.context_window.used_percentage // 0' | cut -d. -f1)
COST=$(echo "$input" | jq -r '.cost.total_cost_usd // 0')

# Context bar
BAR_WIDTH=10
FILLED=$((PCT * BAR_WIDTH / 100))
EMPTY=$((BAR_WIDTH - FILLED))
BAR=""
[ "$FILLED" -gt 0 ] && BAR=$(printf "%${FILLED}s" | tr ' ' '▓')
[ "$EMPTY" -gt 0 ] && BAR="${BAR}$(printf "%${EMPTY}s" | tr ' ' '░')"
if [ "$PCT" -ge 90 ]; then CTX_COLOR='\033[31m'
elif [ "$PCT" -ge 70 ]; then CTX_COLOR='\033[33m'
else CTX_COLOR='\033[32m'; fi

# Rate limits (cached 120s)
CACHE_FILE="/tmp/claude-rate-limits-cache"
CACHE_TTL=120
NOW=$(date +%s)
SHOULD_FETCH=true

if [ -f "$CACHE_FILE" ]; then
    if [[ "$OSTYPE" == "darwin"* ]]; then
        CACHE_AGE=$((NOW - $(stat -f %m "$CACHE_FILE" 2>/dev/null || echo 0)))
    else
        CACHE_AGE=$((NOW - $(stat -c %Y "$CACHE_FILE" 2>/dev/null || echo 0)))
    fi
    [ "$CACHE_AGE" -lt "$CACHE_TTL" ] && SHOULD_FETCH=false
fi

if [ "$SHOULD_FETCH" = "true" ]; then
    RAW=$(security find-generic-password -s 'Claude Code-credentials' -w 2>/dev/null)
    TOKEN=$(echo "$RAW" | jq -r '.claudeAiOauth.accessToken // empty' 2>/dev/null)
    if [ -z "$TOKEN" ]; then
        DECODED=$(echo "$RAW" | xxd -r -p 2>/dev/null)
        TOKEN=$(echo "$DECODED" | jq -r '.claudeAiOauth.accessToken // empty' 2>/dev/null)
    fi
    if [ -n "$TOKEN" ]; then
        USAGE=$(curl -s --max-time 5 "https://api.anthropic.com/api/oauth/usage" \
            -H "Authorization: Bearer $TOKEN" \
            -H "anthropic-beta: oauth-2025-04-20" \
            -H "Accept: application/json" 2>/dev/null)
        [ -n "$USAGE" ] && echo "$USAGE" > "$CACHE_FILE"
    fi
fi

RATE_OUT=""
if [ -f "$CACHE_FILE" ]; then
    CACHE=$(cat "$CACHE_FILE")
    FH=$(echo "$CACHE" | jq -r '.five_hour.utilization // empty' 2>/dev/null)
    SD=$(echo "$CACHE" | jq -r '.seven_day.utilization // empty' 2>/dev/null)
    FH_RESET=$(echo "$CACHE" | jq -r '.five_hour.resets_at // empty' 2>/dev/null)

    if [ -n "$FH" ] && [ -n "$SD" ]; then
        FH_INT=$(printf "%.0f" "$FH")
        SD_INT=$(printf "%.0f" "$SD")

        # Color for 5h
        if [ "$FH_INT" -ge 95 ]; then FH_COLOR='\033[31m'
        elif [ "$FH_INT" -ge 75 ]; then FH_COLOR='\033[33m'
        else FH_COLOR='\033[32m'; fi

        # Color for 7d
        if [ "$SD_INT" -ge 95 ]; then SD_COLOR='\033[31m'
        elif [ "$SD_INT" -ge 75 ]; then SD_COLOR='\033[33m'
        else SD_COLOR='\033[32m'; fi

        # Time until 5h reset
        RESET_STR=""
        if [ -n "$FH_RESET" ]; then
            RESET_EPOCH=$(date -u -j -f "%Y-%m-%dT%H:%M:%S" "${FH_RESET%%.*}" +%s 2>/dev/null || echo 0)
            SECS_LEFT=$((RESET_EPOCH - NOW))
            if [ "$SECS_LEFT" -gt 0 ]; then
                MINS_LEFT=$((SECS_LEFT / 60))
                if [ "$MINS_LEFT" -ge 60 ]; then
                    HRS=$((MINS_LEFT / 60)); MIN=$((MINS_LEFT % 60))
                    RESET_STR=" ↺${HRS}h${MIN}m"
                else
                    RESET_STR=" ↺${MINS_LEFT}m"
                fi
            fi
        fi

        RESET='\033[0m'
        RATE_OUT=" | ${FH_COLOR}5h:${FH_INT}%${RESET}${RESET_STR} ${SD_COLOR}7d:${SD_INT}%${RESET}"
    fi
fi

COST_FMT=$(printf '$%.4f' "$COST")
RESET='\033[0m'
echo -e "[$MODEL] ${CTX_COLOR}${BAR} ${PCT}%${RESET} | ${COST_FMT}${RATE_OUT}"