anti-overengineering

A set of coding rules that keeps changes simple, limited to the request, and free of unnecessary abstractions or dependencies.

In plain words
What is it for?
Use it to guide small, targeted code changes and review whether the solution is simpler and narrower than necessary.
Why use it?
AI coding agents can add complexity or modify unrelated files. These rules keep the implementation focused and encourage checking the final scope.

Cursor rule

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/patrickjs/awesome-cursorrules/anti-overengineering
Clone the repo
git clone --depth 1 https://github.com/PatrickJS/awesome-cursorrules
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 117 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 $0.00117
Opus 5 $0.00000 $0.00059
Sonnet 5 $0.00000 $0.00023
Haiku 4.5 $0.00000 $0.00012

Measured 2d ago against content hash 3e896a210e63, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

anti-overengineering 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 2d 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.

rules/anti-overengineering.mdc · 13 lines

What it actually says

Anti-Over-Engineering

Only change what was asked. Simplest solution first. When unsure, ask.

Do not modify unrequested code, add abstractions without a concrete need, import unnecessary dependencies, rewrite entire files for small changes, or add error handling for impossible scenarios.

Before delivery: verify you only changed requested code, check for simpler approaches, confirm no unrequested files were touched.

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. 2d ago First seen · 13 lines · 0 tokens per session scan A 3e896a210e63

Subscribe to this mod's changes

anti-overengineering is a cursor rule published in the GitHub repository PatrickJS/awesome-cursorrules (40,694 stars, last pushed 3mo ago), licensed CC0-1.0. It costs nothing until one of its globs matches a file; then it loads 117 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.