AIUsageMonitor

English | 中文

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English

A read-only analytics layer over Claude Code's own local usage data. It never calls the Anthropic API — it reads the files Claude Code already writes under ~/.claude (stats-cache.json, history.jsonl, projects/*.jsonl session transcripts) and turns them into daily/period/model/hourly/session usage reports and cost estimates.

Projects

• AIUsageMonitor.Core — class library with the data parsing and analytics engine. No dependency on Cli/WPF.
• AIUsageMonitor.Cli — console app (aimon) exposing usage reports as CLI commands.
• AIUsageMonitor.WPF — Windows desktop dashboard (WPF, Windows-only).

Install

dotnet tool install --global AIUsageMonitor.Cli

Or build from source:

dotnet build AIUsageMonitor.slnx

CLI usage

aimon <command>

(or, from source: dotnet run --project src/AIUsageMonitor.Cli -- <command>)

Commands:

• today — today's usage
• week — current week's usage
• month — current month's usage
• models — usage broken down by model
• sessions — per-session summaries
• hours — usage broken down by hour of day
• watch — live-updating view (today|week|models|sessions|hours), refreshed on an interval
• export — export raw analytics; supports --format json|csv and --output <path> (defaults to stdout, JSON)

WPF dashboard (Windows only)

dotnet run --project src/AIUsageMonitor.WPF

Polls usage data once per minute and renders daily/model/hourly charts.

How it works

Provider-specific code lives under Providers/<Name>/ and implements IUsageProvider. Today there is one provider, Providers/Claude/: ClaudeDataLocator finds the Claude Code data directory, and StatsCacheParser, SessionParser, and HistoryParser parse its JSON/JSONL files (tolerant of malformed lines) via a source-generated System.Text.Json context; ClaudeUsageProvider wraps them behind IUsageProvider. Analytics/UsageAnalyzer computes summaries from an IUsageProvider's data using Analytics/CostCalculator for token cost estimation. Services/DataService is the single facade over all of this, consumed by both the CLI and the WPF app, with a 30-second cache invalidated early by a FileSystemWatcher on stats-cache.json. Long-running reads accept an optional IProgress<int>, which the CLI surfaces as a Spectre.Console progress bar.

Releases

Pushing a v* tag builds self-contained CLI binaries for win-x64/linux-x64/osx-x64/osx-arm64, attaches them to a GitHub release, and publishes the aimon dotnet tool to NuGet (see .github/workflows/ci.yml).

License

MIT — see LICENSE.

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中文

一个基于 Claude Code 本地使用数据的只读分析工具。它从不调用 Anthropic API，只读取 Claude Code 自身已经写入 ~/.claude 目录下的文件(stats-cache.json、history.jsonl、projects/*.jsonl 会话记录),并将其转换为按天/按周期/按模型/按小时/按会话的用量报告与成本估算。

项目结构

• AIUsageMonitor.Core — 数据解析与分析引擎所在的类库,不依赖 Cli/WPF。
• AIUsageMonitor.Cli — 控制台程序(命令名 aimon),以命令行方式输出用量报告。
• AIUsageMonitor.WPF — Windows 桌面仪表盘(WPF,仅支持 Windows)。

安装

dotnet tool install --global AIUsageMonitor.Cli

或从源码构建:

dotnet build AIUsageMonitor.slnx

CLI 用法

aimon <命令>

(或从源码运行:dotnet run --project src/AIUsageMonitor.Cli -- <命令>)

可用命令:

• today — 今日用量
• week — 本周用量
• month — 本月用量
• models — 按模型统计用量
• sessions — 每个会话的用量汇总
• hours — 按小时统计用量
• watch — 实时刷新视图(today|week|models|sessions|hours),按指定间隔自动刷新
• export — 导出原始分析数据;支持 --format json|csv 与 --output <path>(默认输出到标准输出,格式为 JSON)

WPF 仪表盘(仅 Windows)

dotnet run --project src/AIUsageMonitor.WPF

每分钟轮询一次用量数据,并渲染按天/按模型/按小时的图表。

工作原理

各数据源的专属代码位于 Providers/<名称>/ 下,均实现 IUsageProvider 接口。目前只有一个数据源 Providers/Claude/:ClaudeDataLocator 负责定位 Claude Code 的数据目录,StatsCacheParser、SessionParser、HistoryParser 逐行解析其中的 JSON/JSONL 文件(容忍格式错误的行),解析过程使用源生成的 System.Text.Json 上下文;ClaudeUsageProvider 将它们封装为 IUsageProvider。Analytics/UsageAnalyzer 基于某个 IUsageProvider 的数据,结合 Analytics/CostCalculator 计算 token 成本,生成各类统计摘要。Services/DataService 是对上述所有逻辑的统一封装,供 CLI 与 WPF 两端共用,内部对 stats-cache.json 做了 30 秒缓存,并通过 FileSystemWatcher 提前失效。耗时较长的读取操作支持可选的 IProgress<int> 参数,CLI 端会将其渲染为 Spectre.Console 进度条。

发布

推送 v* 标签会为 win-x64/linux-x64/osx-x64/osx-arm64 构建自包含的 CLI 二进制文件,附加到 GitHub Release,并将 aimon dotnet 工具发布到 NuGet(详见 .github/workflows/ci.yml)。

许可协议

MIT — 详见 LICENSE。