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AIUsageTracker: Instructions file for Claude Code

CLAUDE.md

AIUsageTracker CLAUDE.md is an instructions file for Claude Code from rygel/AIUsageTracker. It costs 5,592 tokens per session, scanned A, original, MIT.

Project instructions for AIUsageTracker, a Windows application that monitors AI usage and presents it in a main WPF window. They define build and test commands, code-analysis rules, and the application's architecture and data flow.

In plain words
What is it for?
Use them when building or testing AIUsageTracker, fixing analyzer violations, changing its monitoring or main-window code, or tracing data through the application.
Why use it?
They prevent changes that hide code-quality problems or violate the project's required checks. They also explain how monitoring data reaches the user interface.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Codex; mentions OpenCode.

This is rygel/AIUsageTracker's own configuration. It tells Claude Code how to work on AIUsageTracker itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything AIUsageTracker configures →

not rated 48repo 7d ago A scan 5,592 tokens original MIT
View source ↗ rygel/AIUsageTracker
Reuse

Borrowing it

Nothing to install: this file belongs to rygel/AIUsageTracker. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/rygel/AIUsageTracker/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/rygel/AIUsageTracker

Made for: Claude Code.

Wrote this? Show the measurements

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Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

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Per session 5,592 This file is loaded in full into every session.
When invoked 5,592 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.05592 $0.05592
Opus 5.5 $0.02237 $0.02237
Sonnet 5.5 $0.01118 $0.01118
Haiku 4.5 $0.00559 $0.00559

Measured 1mo ago against content hash 26bef0549ec6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

AIUsageTracker CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 421 lines

How it starts

The opening of the file, as written. The whole thing — 421 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

Build & Test

Before building, kill any running app/monitor instances that lock DLLs:

pwsh -File scripts/kill-all.ps1

Run tests (capped at 4 cores per global CLAUDE.md):

dotnet test AIUsageTracker.Tests/AIUsageTracker.Tests.csproj -T 4

Analyzer Rules — Do Not Weaken

The following .editorconfig rules are enforced at error severity with zero violations. Never lower their severity, add suppressions, or work around them. Fix the underlying code instead.

Rule Severity What it enforces
CA1031 warning No catching general Exception — use specific types
CA1062 error Validate public method parameters for null
CA1307 error Explicit StringComparison on all string operations
CA2016 error Forward CancellationToken to async methods
CA2254 error Use structured logging templates, not interpolation

If a new violation appears, fix it before pushing. Do not:

  • Change severity to suggestion or none
  • Add #pragma warning disable
  • Add [SuppressMessage] attributes
  • Raise analyzer thresholds to make CI pass

Architecture

  • AIUsageTracker.UI.Slim — WPF main window + settings dialog (net10.0-windows)
  • AIUsageTracker.Monitor — Background agent that polls providers and serves usage data over HTTP
  • AIUsageTracker.Core — Shared models, interfaces, monitor client
  • AIUsageTracker.Infrastructure — Provider implementations (Synthetic, Codex, OpenAI, etc.)

Data flow: Monitor → Main Window

  1. Monitor polls each configured provider via IProvider.GetUsageAsync(config)
  2. Results are grouped into AgentGroupedUsageSnapshot and served via HTTP with ETag caching
  3. Main window polls MonitorService.GetGroupedUsageAsync() every 2-60 seconds
  4. GroupedUsageDisplayAdapter.Expand() flattens the snapshot into List<ProviderUsage>
  5. MainWindowRuntimeLogic.PrepareForMainWindow() filters by visibility and state
  6. RenderProviders() builds the card UI

Read the full file on GitHub · 421 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 421 lines · 5,592 tokens per session scan A 26bef0549ec6

Subscribe to this mod's changes

AIUsageTracker CLAUDE.md is an instructions file published in the GitHub repository rygel/AIUsageTracker (48 stars, last pushed 7d ago), licensed MIT. It adds 5,592 tokens to every session, about $0.0224 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Claude Codeantigravitygithub-copilotkimiopencodewindows
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