What is api-creation-guide?

A set of rules for adding API calls to a Jetpack Compose Android app using MVVM, a structure that separates the screen, its state holder, and data operations.

Use it when adding an API endpoint, connecting it to a ViewModel, creating data flows, checking imports and versions, or binding API results to a responsive screen.

It helps place API functions and response-handling flows in the existing interfaces and ViewModels, while keeping implementations aligned with API documentation and project conventions.

api-creation-guide — Cursor rule for Cursor by HeeGyeong/ComposeSample

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.

Clone the repo

git clone --depth 1 https://github.com/HeeGyeong/ComposeSample

Made for: Cursor.

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/rules/heegyeong/composesample/api-creation-guide/github.svg)](https://agentmods.dev/rules/heegyeong/composesample/api-creation-guide)

Your own site

<a href="https://agentmods.dev/rules/heegyeong/composesample/api-creation-guide"><img src="https://agentmods.dev/badge/rules/heegyeong/composesample/api-creation-guide/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/rules/heegyeong/composesample/api-creation-guide"><img src="https://agentmods.dev/badge/rules/heegyeong/composesample/api-creation-guide.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Nothing until a file matches its globs; then the whole rule loads.

When invoked 331 The whole file, excluding the scripts and references it only reads on demand.

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	$0.00000	$0.00331
Opus 5.5	$0.00000	$0.00132
Sonnet 5.5	$0.00000	$0.00066
Haiku 4.5	$0.00000	$0.00033

Measured 1mo ago against content hash d83989311a12, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

api-creation-guide 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.

.cursor/rules/api-creation-guide.mdc · 50 lines

What it actually says

description: "API Creation Guide following MVVM architecture and Material3" globs: "" alwaysApply: true

API Creation Guide Rules

Overview

This rule provides guidelines for adding API call logic based on API documentation following MVVM architecture and Material3 guidelines. Reference the detailed guide from CreateAPIGuide.md.

Requirements

API Call Function

Write API call functions that match the API documentation
Follow the rules specified in Create API and UI Binding Guide

Constraints

Imports: Check existing versions and use appropriate import statements
Responsiveness: Code must be responsive
API Documentation: Required for implementation

Expected Results

API Interface

API functions added to appropriate API interface
Explore existing API interfaces and add functions to appropriate locations
Avoid creating new interfaces when possible

ViewModel Integration

API call functions exist in appropriate ViewModel
Avoid creating new ViewModels when possible
Reuse existing ViewModels that handle similar functionality

Flow Implementation

Add flows that match API documentation
Use Any type for responses when specific response handling is not needed
Follow existing patterns in the codebase

Implementation Guidelines

Ensure all implementations are consistent with existing project patterns and rules
Follow MVVM architecture and Material3 guidelines
Maintain code consistency and readability
Use proper error handling and loading states

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.

1mo ago First seen · 50 lines · 0 tokens per session scan A d83989311a12

Subscribe to this mod's changes

api-creation-guide is a cursor rule published in the GitHub repository HeeGyeong/ComposeSample (11 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 331 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.

Backend and APIs Mobile

api-creation-guide