Claude Codeのstatuslineをカスタマイズしてセッションのステータス状況を見える化する

my-project (main*↑2)
Opus 4.7 [1M] | ctx ▓▓▓▓░░░░░░ 58% (107k) | 1h57m | 5h 17%(rst 2h12m) / 7d 10%(rst 3d0h) | $3.59 | thinking · effort:high · style:concise

input=$(cat)

C_BG=$'\033[48;5;236m'             # 背景: 暗いグレー
C_END=$'\033[0m'                   # 行末: 完全 reset
C_RESET="${C_END}${C_BG}"          # 行内 reset: 全 reset 後に BG 再適用
C_GREEN=$'\033[32m'
C_YELLOW=$'\033[33m'
C_RED=$'\033[31m'
C_CYAN=$'\033[36m'
C_DIM=$'\033[2m'

# 残量に対する色 (高い方が緑)
color_for_remaining() {
    local pct=$1
    if [ "$pct" -ge 50 ]; then echo "$C_GREEN"
    elif [ "$pct" -ge 25 ]; then echo "$C_YELLOW"
    else echo "$C_RED"; fi
}

# 使用率に対する色 (低い方が緑)
color_for_usage() {
    local pct=$1
    if [ "$pct" -lt 50 ]; then echo "$C_GREEN"
    elif [ "$pct" -lt 75 ]; then echo "$C_YELLOW"
    else echo "$C_RED"; fi
}

fmt_tokens() {
    awk -v n="$1" 'BEGIN{
        if (n >= 1000000) printf "%.1fM", n/1000000;
        else if (n >= 1000) printf "%dk", n/1000;
        else printf "%d", n;
    }'
}

fmt_duration() {
    local sec=$1
    if [ "$sec" -ge 86400 ]; then
        local d=$((sec / 86400)); local h=$(( (sec % 86400) / 3600 ))
        printf "%dd%dh" "$d" "$h"
    elif [ "$sec" -ge 3600 ]; then
        local h=$((sec / 3600)); local m=$(( (sec % 3600) / 60 ))
        printf "%dh%dm" "$h" "$m"
    else
        printf "%dm" $((sec / 60))
    fi
}

make_bar() {
    local pct=$1 width=${2:-10}
    local filled=$((pct * width / 100))
    [ "$filled" -gt "$width" ] && filled="$width"
    local empty=$((width - filled))
    local out=""
    for ((i=0; i<filled; i++)); do out="${out}▓"; done
    for ((i=0; i<empty; i++)); do out="${out}░"; done
    printf '%s' "$out"
}

model=$(echo "$input" | jq -r '.model.display_name // .model.id // "unknown"')
model=$(echo "$model" \
    | sed -E 's/^Claude //' \
    | sed -E 's/ \(([0-9]+M) context\)/ [\1]/')

project_dir=$(echo "$input" | jq -r '.workspace.project_dir // .workspace.current_dir // .cwd // ""')
cwd=$(echo "$input" | jq -r '.workspace.current_dir // .cwd // ""')
proj=$(basename "$project_dir")

git_info=""
if [ -n "$cwd" ] && GIT_OPTIONAL_LOCKS=0 git -C "$cwd" rev-parse --git-dir >/dev/null 2>&1; then
    branch=$(GIT_OPTIONAL_LOCKS=0 git -C "$cwd" symbolic-ref --short HEAD 2>/dev/null \
             || GIT_OPTIONAL_LOCKS=0 git -C "$cwd" rev-parse --short HEAD 2>/dev/null)
    dirty=""
    [ -n "$(GIT_OPTIONAL_LOCKS=0 git -C "$cwd" status --porcelain 2>/dev/null | head -1)" ] && dirty="*"
    ab=""
    upstream_count=$(GIT_OPTIONAL_LOCKS=0 git -C "$cwd" rev-list --left-right --count @{upstream}...HEAD 2>/dev/null)
    if [ -n "$upstream_count" ]; then
        behind=$(echo "$upstream_count" | awk '{print $1}')
        ahead=$(echo "$upstream_count" | awk '{print $2}')
        [ "$ahead" != "0" ] && ab="${ab}↑${ahead}"
        [ "$behind" != "0" ] && ab="${ab}↓${behind}"
    fi
    git_info="${branch}${dirty}${ab}"
fi

ctx_part=""
remaining=$(echo "$input" | jq -r '.context_window.remaining_percentage // empty')
used_pct=$(echo "$input" | jq -r '.context_window.used_percentage // empty')
if [ -n "$used_pct" ] && [ "$used_pct" != "null" ]; then
    used_pct_int=$(printf "%.0f" "$used_pct")
    if [ -n "$remaining" ] && [ "$remaining" != "null" ]; then
        rem_pct_int=$(printf "%.0f" "$remaining")
    else
        rem_pct_int=$((100 - used_pct_int))
    fi
    color=$(color_for_remaining "$rem_pct_int")
    bar=$(make_bar "$used_pct_int" 10)
    ctx_part="ctx ${color}${bar}${C_RESET} ${color}${rem_pct_int}%${C_RESET}"

    used=$(echo "$input" | jq -r '
        (.context_window.current_usage // {})
        | (.input_tokens // 0)
          + (.output_tokens // 0)
          + (.cache_creation_input_tokens // 0)
          + (.cache_read_input_tokens // 0)
    ')
    if [ -n "$used" ] && [ "$used" != "null" ] && [ "$used" -gt 0 ]; then
        used_fmt=$(fmt_tokens "$used")
        ctx_part="${ctx_part} ${C_DIM}(${used_fmt})${C_RESET}"
    fi
fi

now=$(date +%s)

fmt_until_reset() {
    local reset_at=$1
    [ -z "$reset_at" ] || [ "$reset_at" = "null" ] && return
    local diff=$((reset_at - now))
    [ "$diff" -le 0 ] && { echo "now"; return; }
    fmt_duration "$diff"
}

rate_part=""
five_h=$(echo "$input" | jq -r '.rate_limits.five_hour.used_percentage // empty')
five_h_reset=$(echo "$input" | jq -r '.rate_limits.five_hour.resets_at // empty')
seven_d=$(echo "$input" | jq -r '.rate_limits.seven_day.used_percentage // empty')
seven_d_reset=$(echo "$input" | jq -r '.rate_limits.seven_day.resets_at // empty')

rate_segs=()
if [ -n "$five_h" ] && [ "$five_h" != "null" ]; then
    pct=$(printf "%.0f" "$five_h")
    color=$(color_for_usage "$pct")
    rest=$(fmt_until_reset "$five_h_reset")
    seg="5h ${color}${pct}%${C_RESET}"
    [ -n "$rest" ] && seg="${seg}${C_DIM}(rst ${rest})${C_RESET}"
    rate_segs+=("$seg")
fi
# 7d も同様 (省略)

duration_ms=$(echo "$input" | jq -r '.cost.total_duration_ms // empty')
if [ -n "$duration_ms" ] && [ "$duration_ms" != "null" ]; then
    total_sec=$((duration_ms / 1000))
    session_elapsed=$(fmt_duration "$total_sec")
fi

cost_usd=$(echo "$input" | jq -r '.cost.total_cost_usd // empty')
if [ -n "$cost_usd" ] && [ "$cost_usd" != "null" ]; then
    cost_part=$(printf "\$%.2f" "$cost_usd")
fi

mode_segs=()
thinking=$(echo "$input" | jq -r '.thinking.enabled // empty')
[ "$thinking" = "true" ] && mode_segs+=("thinking")

effort=$(echo "$input" | jq -r '.effort.level // empty')
[ -n "$effort" ] && [ "$effort" != "null" ] && mode_segs+=("effort:${effort}")

ostyle=$(echo "$input" | jq -r '.output_style.name // empty')
[ -n "$ostyle" ] && [ "$ostyle" != "null" ] && [ "$ostyle" != "default" ] && mode_segs+=("style:${ostyle}")

# 1 行目: プロジェクト (ブランチ)
line1_parts=()
if [ "$project_dir" != "$HOME" ] && [ -n "$proj" ]; then
    if [ -n "$git_info" ]; then
        line1_parts+=("${C_CYAN}${proj}${C_RESET} (${git_info})")
    else
        line1_parts+=("${C_CYAN}${proj}${C_RESET}")
    fi
elif [ -n "$git_info" ]; then
    line1_parts+=("(${git_info})")
fi

# 2 行目: モデル | ctx | 時間 | レート | コスト | モード
line2_parts=("$model")
[ -n "$ctx_part" ] && line2_parts+=("$ctx_part")
[ -n "$session_elapsed" ] && line2_parts+=("$session_elapsed")
[ -n "$rate_part" ] && line2_parts+=("$rate_part")
[ -n "$cost_part" ] && line2_parts+=("$cost_part")
[ -n "$mode_part" ] && line2_parts+=("$mode_part")

join_with_sep() {
    local out=""
    for p in "$@"; do
        if [ -z "$out" ]; then out="$p"; else out="${out}${C_DIM} | ${C_RESET}${p}"; fi
    done
    printf '%s' "$out"
}

line1=$(join_with_sep "${line1_parts[@]}")
line2=$(join_with_sep "${line2_parts[@]}")

[ -n "$line1" ] && printf '%b\n' "${C_BG}${line1}${C_END}"
printf '%b\n' "${C_BG}${line2}${C_END}"

chmod +x ~/.claude/scripts/statusline.sh

{
  "statusLine": {
    "type": "command",
    "command": "bash ~/.claude/scripts/statusline.sh",
    "padding": 1
  }
}