What is mobile-best-practices CLAUDE.md?

Repository instructions for a searchable collection of 1,937 mobile-development practices. The collection covers Android, iOS, Flutter, and React Native, including architecture, interface design, performance, security, testing, and code examples.

Use it to search mobile-development guidance by topic, platform, or domain, and to find related patterns, anti-patterns, dependencies, checklists, and sample code.

It gives a coding assistant a structured reference instead of requiring developers to search through many mobile rules manually. The instructions also define where the source data and search tools are located.

How tungnk123/mobile-best-practices configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to tungnk123/mobile-best-practices. 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/tungnk123/mobile-best-practices/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/tungnk123/mobile-best-practices

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/tungnk123/mobile-best-practices/claude-md/github.svg)](https://agentmods.dev/instructions/tungnk123/mobile-best-practices/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/tungnk123/mobile-best-practices/claude-md"><img src="https://agentmods.dev/badge/instructions/tungnk123/mobile-best-practices/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/tungnk123/mobile-best-practices/claude-md"><img src="https://agentmods.dev/badge/instructions/tungnk123/mobile-best-practices/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 702 This file is loaded in full into every session.

When invoked 702 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	$0.00702	$0.00702
Opus 5	$0.00351	$0.00351
Sonnet 5	$0.00140	$0.00140
Haiku 4.5	$0.00070	$0.00070

Measured 10d ago against content hash 6bb87dd9a2cf, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

mobile-best-practices 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 10d 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 · 58 lines

How it starts

The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Mobile Best Practices - Development Intelligence

This file guides Claude Code (claude.ai/code) when working with this repository.

Project Overview

Mobile Best Practices is a searchable database of 1,937 mobile development best practices packaged as an AI skill for Claude Code and other AI coding assistants. It covers architecture patterns, design patterns, UI components, anti-patterns, libraries, performance rules, security practices, testing patterns, code snippets, Gradle dependencies, and platform-specific guidelines for Android, iOS, Flutter, and React Native.

Architecture

Source of Truth: src/mobile-best-practices/ — follows the Agent Skills open format. See SKILL.md for full skill documentation.

Key paths: data/*.csv (16 CSV databases), scripts/core.py (BM25 engine), scripts/search.py (CLI), references/ (CODE-RULES.md, CHECKLIST.md), templates/ (platform configs).

CLI package: cli/ — npm installer with bundled assets in cli/assets/.

Search Command

python3 src/mobile-best-practices/scripts/search.py "<query>" --domain <domain> [-n <max_results>]

Sync Rules

When modifying files:

Data & Scripts — Always edit in src/mobile-best-practices/. Changes auto-available via symlinks to .claude/skills/.
Templates — Edit in src/mobile-best-practices/templates/.
References — Edit in src/mobile-best-practices/references/.

CLI Assets — Sync before publishing:

cp -r src/mobile-best-practices/data/* cli/assets/data/
cp -r src/mobile-best-practices/scripts/* cli/assets/scripts/
cp -r src/mobile-best-practices/references/* cli/assets/references/
cp -r src/mobile-best-practices/templates/* cli/assets/templates/

Read the full file on GitHub · 58 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.

10d ago First seen · 58 lines · 702 tokens per session scan A 6bb87dd9a2cf

Subscribe to this mod's changes

mobile-best-practices CLAUDE.md is an instructions file published in the GitHub repository tungnk123/mobile-best-practices (22 stars, last pushed 6mo ago), licensed MIT. It adds 702 tokens to every session, about $0.0035 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.

Mobile

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.

vercel/next.js · 7,296 tokens

codex AGENTS.md

AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.

openai/codex · 5,153 tokens

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).

microsoft/vscode · 6,785 tokens

mobile-best-practices: Instructions file for Claude Code