What is arcana-cli CLAUDE.md?

A set of instructions for developing Arcana CLI, a TypeScript terminal tarot-reading application built with Ink, a library for making terminal interfaces with React-style components.

It guides work on the CLI entry point, terminal interface components, builds, development watch mode, and compiled output.

It keeps development consistent by documenting the project structure, TypeScript and module rules, formatting conventions, and build commands.

How kellymears/arcana-cli configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to kellymears/arcana-cli. 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/kellymears/arcana-cli/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/kellymears/arcana-cli

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/kellymears/arcana-cli/claude-md/github.svg)](https://agentmods.dev/instructions/kellymears/arcana-cli/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/kellymears/arcana-cli/claude-md"><img src="https://agentmods.dev/badge/instructions/kellymears/arcana-cli/claude-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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/kellymears/arcana-cli/claude-md"><img src="https://agentmods.dev/badge/instructions/kellymears/arcana-cli/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 389 This file is loaded in full into every session.

When invoked 389 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.

Model	Per session	Once invoked
Fable 5.1	$0.00389	$0.00389
Opus 5.5	$0.00156	$0.00156
Sonnet 5.5	$0.00078	$0.00078
Haiku 4.5	$0.00039	$0.00039

Measured 2mo ago against content hash bf3e26b1b0de, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

arcana-cli 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 2mo 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 · 39 lines

What it actually says

CLAUDE.md

Project overview

Arcana CLI — a terminal tarot reading application built with Ink (React for CLIs). TypeScript, ES Modules, Node 24+.

Architecture

src/cli.tsx — Entry point. Calls Ink's render() with the root <App /> component.
src/app.tsx — Root component. All UI flows from here.
dist/ — Compiled output (gitignored). The dist/cli.js binary is the executable.

Ink components use <Box> for layout (flexbox) and <Text> for styled text output. Think React but rendering to the terminal.

Key conventions

ESM only — "type": "module" in package.json. All imports use .js extensions (NodeNext resolution requires this even for .tsx source files).
Automatic JSX runtime — jsx: "react-jsx" in tsconfig. Do not add import React to component files.
Strict TypeScript — strict mode is enabled.
Import sorting — eslint-plugin-perfectionist enforces natural sort order on imports, exports, object keys, and JSX props. Sort alphabetically.
Prettier — double quotes, semicolons, trailing commas, 2-space indent, 80 char width.

Commands

npm run build — Compile TypeScript to dist/
npm run dev — Watch mode
npm start — Run the CLI
npm run lint — ESLint
npm run format — Prettier write
npm run format:check — Prettier check

Verification

After making changes, always run:

npm run build && npm start && npm run lint && npm run format:check

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.

2mo ago First seen · 39 lines · 389 tokens per session scan A bf3e26b1b0de

Subscribe to this mod's changes

arcana-cli CLAUDE.md is an instructions file published in the GitHub repository kellymears/arcana-cli (0 stars, last pushed 7mo ago), licensed ISC. It adds 389 tokens to every session, about $0.0016 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 2026-08-31.

fun

arcana-cli CLAUDE.md next to 6 instructions from other repositories
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arcana-cli: Instructions file for Claude Code