# token-stats-hook

Claude Code Stop hook：每次会话结束时自动将 token 用量快照追加到 `~/.claude/token-stats-backup.jsonl`。

用 Go 编写，编译为二进制，启动时间 <5ms。

## 安装

```bash
cd hooks/token-stats-hook
go build -o ~/.claude/token-stats-hook-bin .
```

然后在 `~/.claude/settings.json` 中加入：

```json
{
  "hooks": {
    "Stop": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "~/.claude/token-stats-hook-bin 2>/dev/null || true"
          }
        ]
      }
    ]
  }
}
```

## 备份格式

每行一条 JSON 记录：

```json
{"timestamp":"2026-04-18T02:03:11Z","date":"2026-04-18","user":"charles","input":12861,"output":176499,"cache_write":1352380,"cache_read":15525643,"actual":189360}
```