Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/tleyden/arty/agents-mdgit clone --depth 1 https://github.com/tleyden/artyWhat 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 | $0.00336 | $0.00336 |
| Opus 5 | $0.00168 | $0.00168 |
| Sonnet 5 | $0.00067 | $0.00067 |
| Haiku 4.5 | $0.00034 | $0.00034 |
Grade A, and why
arty 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 2d 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.
What it actually says
- Always start every response with the phrase: “🚀 Codex is rocking your codebase”
- When creating expo react native UI, avoid making components too large - better refactor them into smaller reusable components
- Despite being a cross-platform expo app, the team only has the capacity to maintain an ios version for now. Later we will tackle android, but for now completely ignore it.
- Always use Apple Human Interface Guidelines (HIG) and known UI / UX best practices, as you are an iOS swift superstar developer
- When logging, default to logging full values and not substrings. Later we can prune as needed, but right now there is an observability crisis.
- Certain swift objects like AVAudioPlayerDelegate should have serialized access when called from multiple threads. Consider protecting shared state with a serial DispatchQueue or ensuring all method calls dispatch to the main queue.
- Prefer convention over configuration, this keeps things light, de-coupled, and avoids needless boilerplate.
- In logfire, the project is using the old name: vibemachine
Always use expo libraries, for example:
Don't use:
remove import { promises as fs } from 'fs'; and replace with
instead use:
import * as FileSystem from 'expo-file-system';
const text = await FileSystem.readAsStringAsync(uri);
Also for fetch, use expo fetch.
Never use:
import { createHash } from 'crypto';
instead use:
expo install expo-crypto import * as Crypto from 'expo-crypto';
const hash = await Crypto.digestStringAsync( Crypto.CryptoDigestAlgorithm.SHA256, "your-data" );
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.
- 2d ago First seen · 36 lines · 336 tokens per session scan A 138c28007067
arty AGENTS.md is an instructions file published in the GitHub repository tleyden/arty (21 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 336 tokens to every session, about $0.0017 per session on Opus 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.
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