code-conventions

code-conventions is a cursor rule for Cursor from maccman/ai-monorepo-scaffold. It costs 0 tokens per session (1,089 once invoked), scanned A, original, MIT.

A set of project-specific rules for writing and changing code in a TypeScript project using React, Astro, Tailwind CSS, and shared packages.

In plain words
What is it for?
It is for guiding TypeScript changes, shared package work, tests, formatting, linting, dependency updates, authentication, and PostgreSQL access.
Why use it?
It keeps code style, testing, dependencies, authentication, and database work consistent across the project.

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/maccman/ai-monorepo-scaffold/code-conventions
Clone the repo
git clone --depth 1 https://github.com/maccman/ai-monorepo-scaffold

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.

agentmods badge for code-conventions

README.md
[![agentmods](https://agentmods.dev/badge/rules/maccman/ai-monorepo-scaffold/code-conventions.svg)](https://agentmods.dev/rules/maccman/ai-monorepo-scaffold/code-conventions)
Your own site
<a href="https://agentmods.dev/rules/maccman/ai-monorepo-scaffold/code-conventions"><img src="https://agentmods.dev/badge/rules/maccman/ai-monorepo-scaffold/code-conventions.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 1,089 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 $0.01089
Opus 5 $0.00000 $0.00544
Sonnet 5 $0.00000 $0.00218
Haiku 4.5 $0.00000 $0.00109

Measured 4d ago against content hash 0b75d6d96ea7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-conventions 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 4d 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/code-conventions.mdc · 87 lines

How it starts

The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Technologies used

  • React & Astro - Build interactive UIs with React components in Astro
  • tRPC - End-to-end type-safe APIs without schemas or code generation
  • Tailwind CSS - Utility-first CSS framework for rapid UI development
  • TypeScript - Full type safety across all packages
  • Turborepo - High-performance build system for JavaScript/TypeScript monorepos
  • PNPM Workspaces - Fast, disk-efficient package management
  • ESLint & Prettier - Code quality tools configured and ready to use
  • Renovate - Automated dependency updates
  • Auth - We use better-auth
  • DB - We use postgres and kysely as the client.

Code Conventions

When writing or modifying code in this project, please adhere to the following conventions:

  1. TypeScript Best Practices: Follow standard, idiomatic TypeScript coding practices for structure, naming, and types, unless otherwise overridden.
  2. Minimal Comments: Avoid adding comments unless they explain complex logic or non-obvious decisions. Well-written, self-explanatory code is preferred. Do not add comments that merely restate what the code does.
  3. Tests as Documentation: Rely on comprehensive tests (which will be added later if not present) to document the behavior and usage of the code, rather than extensive comments within the code itself.
  4. File naming conventions: Use kebab-case when naming directories, TypeScript, and other files.
  5. Type checking: after major modifications run pnpm typecheck and fix any errors.
  6. UX/UI We are using Tailwind CSS, React, shadcn/ui components and Lucide React icons. Generate responsive designs. Provide default props for React Components. Check to see if a shadcn component exists under apps/web/src/components/ui before installing it. Always use cn from @/lib/utils for class name merging.
  7. Models/db/tables When pulling in a database type, use:
import type { Conversation } from '@app/db/types'
import type { Selectable } from 'kysely'

interface ConversationItemProps {
  conversation: Selectable<Conversation>
}

Read the full file on GitHub · 87 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.

  1. 4d ago First seen · 87 lines · 1,089 tokens per session scan A 0b75d6d96ea7

Subscribe to this mod's changes

code-conventions is a cursor rule published in the GitHub repository maccman/ai-monorepo-scaffold (304 stars, last pushed 10mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,089 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.