project-structure

A set of project rules for organizing an Android application into layers and separate feature modules. It describes where business logic, data access, screens, navigation, and shared resources should live.

In plain words
What is it for?
Use it when deciding where to place models, repositories, use cases, remote and local data sources, screens, view models, navigation, shared utilities, UI components, and resource files.
Why use it?
It gives developers a consistent structure so code is easier to find and modules do not depend on the wrong parts of the application.

Cursor rule for Cursor

Install

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.

agentmods
npx agentmods add rules/heegyeong/composesample/project-structure
Clone the repo
git clone --depth 1 https://github.com/HeeGyeong/ComposeSample

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 190 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.00190
Opus 5 $0.00000 $0.00095
Sonnet 5 $0.00000 $0.00038
Haiku 4.5 $0.00000 $0.00019

Measured yesterday against content hash 564affc5ebe2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

project-structure 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 yesterday.

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.

.cursor/rules/project-structure.mdc · 40 lines

What it actually says

Project Structure Guide

Layer Structure

app/
├── domain/
│   ├── model/
│   ├── repository/
│   └── usecase/
├── data/
│   ├── remote/
│   ├── local/
│   └── repository/
└── presentation/
    ├── ui/
    ├── viewmodel/
    └── navigation/

Modularization Rules

  • Separate modules by feature
  • Common utilities in core module
  • UI components in design-system module

Dependency Rules

  • Domain layer uses pure Kotlin only
  • Data layer depends on domain layer
  • Presentation layer depends only on domain layer

Resource Management

  • Strings in strings.xml
  • Colors in colors.xml
  • Themes in theme.xml
  • Images in drawable/ or mipmap/
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. yesterday First seen · 40 lines · 0 tokens per session scan A 564affc5ebe2

Subscribe to this mod's changes

project-structure is a cursor rule published in the GitHub repository HeeGyeong/ComposeSample (11 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 190 tokens. 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.