Borrowing it
Nothing to install: this file belongs to evanlong-me/model-usage. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/evanlong-me/model-usage/main/AGENTS.mdgit clone --depth 1 https://github.com/evanlong-me/model-usageWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/evanlong-me/model-usage/agents-md)<a href="https://agentmods.dev/instructions/evanlong-me/model-usage/agents-md"><img src="https://agentmods.dev/badge/instructions/evanlong-me/model-usage/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>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.
<a href="https://agentmods.dev/instructions/evanlong-me/model-usage/agents-md"><img src="https://agentmods.dev/badge/instructions/evanlong-me/model-usage/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.01868 | $0.01868 |
| Opus 5.5 | $0.00747 | $0.00747 |
| Sonnet 5.5 | $0.00374 | $0.00374 |
| Haiku 4.5 | $0.00187 | $0.00187 |
Grade A, and why
model-usage AGENTS.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.
How it starts
The opening of the file, as written. The whole thing — 180 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Model Usage
Zero-config CLI for analyzing AI model usage & costs across all local TUI tools — pi, Claude Code, Codex, Gemini CLI, OpenCode, and more.
Project Structure
├── src/
│ ├── cli.ts # CLI entry point (Commander setup)
│ ├── display.ts # Output formatting (tables, models, projects)
│ ├── usage.ts # Read usage data (auto-detect all sources)
│ ├── aggregator.ts # Aggregate messages by project/date
│ ├── filters.ts # Time and project filtering
│ ├── sorter.ts # Sorting by cost/time/tokens/project
│ ├── pricing.ts # Fetch model pricing from LiteLLM
│ ├── project-detector.ts # Auto-detect current project
│ ├── update-checker.ts # Check for npm updates
│ ├── github-prompt.ts # GitHub star prompt
│ ├── source-selector.ts # Interactive TUI source picker
│ ├── util.ts # Shared utilities (path, fetch)
│ ├── types.ts # TypeScript type definitions
│ ├── cli-table3.d.ts # Type declarations for cli-table3
│ └── sources/ # Auto-discovered source adapters
│ ├── index.ts # Auto-discovery (no manual imports needed)
│ ├── common.ts # Shared utilities for all sources
│ ├── pi.ts # pi sessions
│ ├── claude.ts # Claude Code sessions
│ ├── codex.ts # Codex CLI sessions
│ ├── gemini.ts # Gemini CLI sessions
│ ├── opencode.ts # OpenCode sessions (SQLite)
│ └── grok.ts # Grok CLI sessions (SQLite)
├── dist/ # Compiled output (gitignored)
├── tsconfig.json
└── package.json
Key Commands
# Default (interactive source selection if TTY, else all sources)
mu # Show all usage for auto-detected project
mu -a # Show all projects (skip auto-detection)
# Source selection
mu -s pi,opencode # Only query specific TUI tools (long form: --sources)
mu --sources all # Query all sources (skip selection)
mu # Interactive checkbox UI to pick sources
# Filtering
mu -t 7d # Last 7 days (rolling, relative to "now"); also 30min, 2h, 1m, 1y
mu -t today # Calendar keywords: today, yesterday, thisweek, lastweek,
# thismonth, lastmonth, thisyear, lastyear (week starts Monday;
# hyphenated aliases like this-week work too)
mu -t 7-8 # Month range this year; july-august or 2025-7-2026-8 also work
mu -t 2026-07-25 # A single date — that whole calendar day
mu -p <project> # Filter by project (partial match: "model", "obix")
mu -m <model> # Filter by model (partial match: "sonnet", "gpt-5")
# Sorting
mu -k cost -o desc # Sort by cost descending
mu -k time -o asc # Sort by time ascending (default)
# View modes
mu -d # Detailed view (individual messages)
mu -b # Aggregate by date only (combines all projects)
# Lists
mu -P # List projects
mu -M # List models with pricing
# Combined
mu -m sonnet -t 7d # Last 7 days, sonnet models only
mu -m haiku -p myproject --by-date # Per-day, haiku only, specific project
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.
- 1mo ago First seen · 180 lines · 1,868 tokens per session scan A a0e2ab654450
model-usage AGENTS.md is an instructions file published in the GitHub repository evanlong-me/model-usage (21 stars, last pushed 1mo ago), licensed MIT. It adds 1,868 tokens to every session, about $0.0075 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.