How do I install m15-anti-pattern?

Run `npx skills add https://github.com/zhanghandong/rust-skills --skill m15-anti-pattern` in your terminal. You need to have run `npx skills init` once in your project first.

Which agent frameworks does m15-anti-pattern support?

m15-anti-pattern works with any agent framework supported by the Skills registry, including Claude Code, Cursor, GitHub Copilot, Cline, Codex, and Gemini CLI.

Is m15-anti-pattern free to use?

Yes. m15-anti-pattern is free to install and use. It is available from the open explainx.ai skill registry published by zhanghandong.

Where can I read ratings and reviews for m15-anti-pattern?

Community ratings and review text appear on this explainx.ai skill page below the description. Reviews use a 1–5 scale and may include short written feedback from signed-in members.

How do I install m15-anti-pattern?

Run `npx skills add https://github.com/zhanghandong/rust-skills --skill m15-anti-pattern` in your terminal. You need to have run `npx skills init` once in your project first.

Which agent frameworks does m15-anti-pattern support?

m15-anti-pattern works with any agent framework supported by the Skills registry, including Claude Code, Cursor, GitHub Copilot, Cline, Codex, and Gemini CLI.

Is m15-anti-pattern free to use?

Yes. m15-anti-pattern is free to install and use. It is available from the open explainx.ai skill registry published by zhanghandong.

Where can I read ratings and reviews for m15-anti-pattern?

Community ratings and review text appear on this explainx.ai skill page below the description. Reviews use a 1–5 scale and may include short written feedback from signed-in members.

How do I install m15-anti-pattern?

Run `npx skills add https://github.com/zhanghandong/rust-skills --skill m15-anti-pattern` in your terminal. You need to have run `npx skills init` once in your project first.

Which agent frameworks does m15-anti-pattern support?

m15-anti-pattern works with any agent framework supported by the Skills registry, including Claude Code, Cursor, GitHub Copilot, Cline, Codex, and Gemini CLI.

Is m15-anti-pattern free to use?

Yes. m15-anti-pattern is free to install and use. It is available from the open explainx.ai skill registry published by zhanghandong.

Where can I read ratings and reviews for m15-anti-pattern?

Community ratings and review text appear on this explainx.ai skill page below the description. Reviews use a 1–5 scale and may include short written feedback from signed-in members.

How do I install m15-anti-pattern?

Run `npx skills add https://github.com/zhanghandong/rust-skills --skill m15-anti-pattern` in your terminal. You need to have run `npx skills init` once in your project first.

Which agent frameworks does m15-anti-pattern support?

m15-anti-pattern works with any agent framework supported by the Skills registry, including Claude Code, Cursor, GitHub Copilot, Cline, Codex, and Gemini CLI.

Is m15-anti-pattern free to use?

Yes. m15-anti-pattern is free to install and use. It is available from the open explainx.ai skill registry published by zhanghandong.

Where can I read ratings and reviews for m15-anti-pattern?

Community ratings and review text appear on this explainx.ai skill page below the description. Reviews use a 1–5 scale and may include short written feedback from signed-in members.

How do I install m15-anti-pattern?

Run `npx skills add https://github.com/zhanghandong/rust-skills --skill m15-anti-pattern` in your terminal. You need to have run `npx skills init` once in your project first.

Which agent frameworks does m15-anti-pattern support?

m15-anti-pattern works with any agent framework supported by the Skills registry, including Claude Code, Cursor, GitHub Copilot, Cline, Codex, and Gemini CLI.

Is m15-anti-pattern free to use?

Yes. m15-anti-pattern is free to install and use. It is available from the open explainx.ai skill registry published by zhanghandong.

Where can I read ratings and reviews for m15-anti-pattern?

Community ratings and review text appear on this explainx.ai skill page below the description. Reviews use a 1–5 scale and may include short written feedback from signed-in members.

How do I install m15-anti-pattern?

Run `npx skills add https://github.com/zhanghandong/rust-skills --skill m15-anti-pattern` in your terminal. You need to have run `npx skills init` once in your project first.

Which agent frameworks does m15-anti-pattern support?

m15-anti-pattern works with any agent framework supported by the Skills registry, including Claude Code, Cursor, GitHub Copilot, Cline, Codex, and Gemini CLI.

Is m15-anti-pattern free to use?

Yes. m15-anti-pattern is free to install and use. It is available from the open explainx.ai skill registry published by zhanghandong.

Where can I read ratings and reviews for m15-anti-pattern?

Community ratings and review text appear on this explainx.ai skill page below the description. Reviews use a 1–5 scale and may include short written feedback from signed-in members.

How do I install m15-anti-pattern?

Run `npx skills add https://github.com/zhanghandong/rust-skills --skill m15-anti-pattern` in your terminal. You need to have run `npx skills init` once in your project first.

Which agent frameworks does m15-anti-pattern support?

m15-anti-pattern works with any agent framework supported by the Skills registry, including Claude Code, Cursor, GitHub Copilot, Cline, Codex, and Gemini CLI.

Is m15-anti-pattern free to use?

Yes. m15-anti-pattern is free to install and use. It is available from the open explainx.ai skill registry published by zhanghandong.

Where can I read ratings and reviews for m15-anti-pattern?

Community ratings and review text appear on this explainx.ai skill page below the description. Reviews use a 1–5 scale and may include short written feedback from signed-in members.

How do I install m15-anti-pattern?

Run `npx skills add https://github.com/zhanghandong/rust-skills --skill m15-anti-pattern` in your terminal. You need to have run `npx skills init` once in your project first.

Which agent frameworks does m15-anti-pattern support?

m15-anti-pattern works with any agent framework supported by the Skills registry, including Claude Code, Cursor, GitHub Copilot, Cline, Codex, and Gemini CLI.

Is m15-anti-pattern free to use?

Yes. m15-anti-pattern is free to install and use. It is available from the open explainx.ai skill registry published by zhanghandong.

Where can I read ratings and reviews for m15-anti-pattern?

Community ratings and review text appear on this explainx.ai skill page below the description. Reviews use a 1–5 scale and may include short written feedback from signed-in members.

How do I install m15-anti-pattern?

Run `npx skills add https://github.com/zhanghandong/rust-skills --skill m15-anti-pattern` in your terminal. You need to have run `npx skills init` once in your project first.

Which agent frameworks does m15-anti-pattern support?

m15-anti-pattern works with any agent framework supported by the Skills registry, including Claude Code, Cursor, GitHub Copilot, Cline, Codex, and Gemini CLI.

Is m15-anti-pattern free to use?

Yes. m15-anti-pattern is free to install and use. It is available from the open explainx.ai skill registry published by zhanghandong.

Where can I read ratings and reviews for m15-anti-pattern?

Community ratings and review text appear on this explainx.ai skill page below the description. Reviews use a 1–5 scale and may include short written feedback from signed-in members.

How do I install m15-anti-pattern?

Run `npx skills add https://github.com/zhanghandong/rust-skills --skill m15-anti-pattern` in your terminal. You need to have run `npx skills init` once in your project first.

Which agent frameworks does m15-anti-pattern support?

m15-anti-pattern works with any agent framework supported by the Skills registry, including Claude Code, Cursor, GitHub Copilot, Cline, Codex, and Gemini CLI.

Is m15-anti-pattern free to use?

Yes. m15-anti-pattern is free to install and use. It is available from the open explainx.ai skill registry published by zhanghandong.

Where can I read ratings and reviews for m15-anti-pattern?

Community ratings and review text appear on this explainx.ai skill page below the description. Reviews use a 1–5 scale and may include short written feedback from signed-in members.

How do I install m15-anti-pattern?

Run `npx skills add https://github.com/zhanghandong/rust-skills --skill m15-anti-pattern` in your terminal. You need to have run `npx skills init` once in your project first.

Productivity

m15-anti-pattern

Identify and resolve common Rust code anti-patterns during review.

zhanghandong/rust-skills|Updated Apr 8, 2026

Works with

Claude CodeCursorClineWindsurfCodexGooseGitHub CopilotZed

total installs

this week

979

GitHub stars

upvotes

Install Skill

Run in your terminal

$npx skills add https://github.com/zhanghandong/rust-skills --skill m15-anti-pattern

installs

this week

979

stars

View on GitHub

m15 anti pattern

0 commentsJoin discussion →

What it does

Covers eight major anti-patterns with explanations and idiomatic alternatives, including excessive cloning, unwrap in production, and fighting the borrow checker
Provides a thinking framework to distinguish symptoms from root causes and trace issues to underlying design problems
Includes quick reference tables for beginner mistakes, code smells, common error patterns, and deprecated approaches with fixes
Links anti

Repository

zhanghandong/rust-skills

Last updated

Apr 8, 2026

Installation Guide

Select your AI agent

How to use m15-anti-pattern on Cursor

AI-first code editor with Composer

Prerequisites

Before installing skills in Cursor, ensure your development environment meets these requirements:

›Cursor installed and configured on your machine
›Node.js 16+ with npm — verify with node --version
›Active project directory where you want to add m15-anti-pattern

Run the install command

Execute the skills CLI command in your project's root directory to begin installation:

$npx skills add https://github.com/zhanghandong/rust-skills --skill m15-anti-pattern

Fetches m15-anti-pattern from zhanghandong/rust-skills and configures it for Cursor.

Select Cursor when prompted

The CLI shows a list of agents. Use arrow keys and space to select Cursor:

◆ Which agents do you want to install to?

│

│ ── Universal (.agents/skills) ────────────────

│ · Cline · Codex · Goose · Windsurf

│ ●Cursor(selected)

│ · Cursor · Aider · Continue

Verify installation

Confirm successful installation by checking the skill directory location:

.cursor/skills/m15-anti-pattern

Restart Cursor to activate m15-anti-pattern. Access via /m15-anti-pattern in your agent's command palette.

⚠

Security Notice

We perform automated surface-level scans (Gen AI Scanner, Socket, Snyk) during installation. These checks detect common vulnerabilities but do not guarantee complete security. Always review skill source code and verify the publisher's reputation before production use.

Skills execute code in your environment. Always review source, verify the publisher, and test in isolation before production.

›View source on GitHub ›Skills CLI docs ›About Cursor ›What are agent skills?

Documentation

Anti-Patterns

Layer 2: Design Choices

Core Question

Is this pattern hiding a design problem?

When reviewing code:

Is this solving the symptom or the cause?
Is there a more idiomatic approach?
Does this fight or flow with Rust?

Anti-Pattern → Better Pattern

Anti-Pattern	Why Bad	Better
`.clone()` everywhere	Hides ownership issues	Proper references or ownership
`.unwrap()` in production	Runtime panics	`?`, `expect`, or handling
`Rc` when single owner	Unnecessary overhead	Simple ownership
`unsafe` for convenience	UB risk	Find safe pattern
OOP via `Deref`	Misleading API	Composition, traits
Giant match arms	Unmaintainable	Extract to methods
`String` everywhere	Allocation waste	`&str`, `Cow<str>`
Ignoring `#[must_use]`	Lost errors	Handle or `let _ =`

Thinking Prompt

When seeing suspicious code:

Is this symptom or cause?
- Clone to avoid borrow? → Ownership design issue
- Unwrap "because it won't fail"? → Unhandled case
What would idiomatic code look like?
- References instead of clones
- Iterators instead of index loops
- Pattern matching instead of flags
Does this fight Rust?
- Fighting borrow checker → restructure
- Excessive unsafe → find safe pattern

Trace Up ↑

To design understanding:

"Why does my code have so many clones?"
    ↑ Ask: Is the ownership model correct?
    ↑ Check: m09-domain (data flow design)
    ↑ Check: m01-ownership (reference patterns)

Anti-Pattern	Trace To	Question
Clone everywhere	m01-ownership	Who should own this data?
Unwrap everywhere	m06-error-handling	What's the error strategy?
Rc everywhere	m09-domain	Is ownership clear?
Fighting lifetimes	m09-domain	Should data structure change?

Trace Down ↓

To implementation (Layer 1):

"Replace clone with proper ownership"
    ↓ m01-ownership: Reference patterns
    ↓ m02-resource: Smart pointer if needed

"Replace unwrap with proper handling"
    ↓ m06-error-handling: ? operator
    ↓ m06-error-handling: expect with message

Top 5 Beginner Mistakes

Rank	Mistake	Fix
1	Clone to escape borrow checker	Use references
2	Unwrap in production	Propagate with `?`
3	String for everything	Use `&str`
4	Index loops	Use iterators
5	Fighting lifetimes	Restructure to own data

Code Smell → Refactoring

Smell	Indicates	Refactoring
Many `.clone()`	Ownership unclear	Clarify data flow
Many `.unwrap()`	Error handling missing	Add proper handling
Many `pub` fields	Encapsulation broken	Private + accessors
Deep nesting	Complex logic	Extract methods
Long functions	Multiple responsibilities	Split
Giant enums	Missing abstraction	Trait + types

Common Error Patterns

Error	Anti-Pattern Cause	Fix
E0382 use after move	Cloning vs ownership	Proper references
Panic in production	Unwrap everywhere	?, matching
Slow performance	String for all text	&str, Cow
Borrow checker fights	Wrong structure	Restructure
Memory bloat	Rc/Arc everywhere	Simple ownership

Deprecated → Better

Deprecated	Better
Index-based loops	`.iter()`, `.enumerate()`
`collect::<Vec<_>>()` then iterate	Chain iterators
Manual unsafe cell	`Cell`, `RefCell`
`mem::transmute` for casts	`as` or `TryFrom`
Custom linked list	`Vec`, `VecDeque`
`lazy_static!`	`std::sync::OnceLock`

Quick Review Checklist

No .clone() without justification
No .unwrap() in library code
No pub fields with invariants
No index loops when iterator works
No String where &str suffices
No ignored #[must_use] warnings
No unsafe without SAFETY comment
No giant functions (>50 lines)

Related Skills

When	See
Ownership patterns	m01-ownership
Error handling	m06-error-handling
Mental models	m14-mental-model
Performance	m10-performance

List & Monetize Your Skill

Submit your Claude Code skill and start earning

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Use Cases

User Story & Requirements Generation

Create detailed user stories, acceptance criteria, and feature specs

Example

Generate user stories for 'password reset feature' with acceptance criteria, edge cases, and test scenarios

✓

Reduce spec writing time by 50%, ensure comprehensive coverage

Competitive Analysis

Research competitors, compare features, identify gaps

Example

Analyze 5 competitor products, create feature comparison matrix, suggest differentiation opportunities

✓

Complete competitive research in 2 hours instead of 2 days

Roadmap Prioritization

Evaluate features using frameworks (RICE, ICE, Kano) and create prioritized backlogs

Example

Score 20 feature ideas using RICE framework, generate prioritized roadmap with rationale

✓

Make data-driven prioritization decisions faster

Stakeholder Communication

Draft PRDs, status updates, and stakeholder presentations

Example

Create executive summary of Q3 roadmap, monthly progress report, feature launch announcement

✓

Save 3-5 hours/week on communication overhead

Implementation Guide

Prerequisites

›Claude Desktop or compatible AI client
›Access to product documentation and roadmap tools (Jira, Notion, etc.)
›Understanding of product management frameworks (RICE, Jobs-to-be-Done, etc.)
›Stakeholder contact information and communication channels

Time Estimate

30-60 minutes to see productivity improvements

Steps

1Install product management skill
2Start with user story generation for known feature
3Progress to competitive analysis: research 2-3 competitors
4Use for roadmap prioritization: apply RICE/ICE scoring
5Draft stakeholder communications and refine based on feedback
6Build template library for recurring PM tasks
7Share effective prompts with product team

Common Pitfalls

⚠Not validating competitive research—verify facts before sharing
⚠Accepting user stories without involving engineering team
⚠Over-relying on frameworks without qualitative judgment
⚠Not customizing outputs to company culture and communication style
⚠Skipping stakeholder validation of generated requirements

Best Practices

✓ Do

+Validate research and competitive analysis with real data
+Collaborate with engineering when generating technical requirements
+Customize frameworks and templates to your company context
+Use skill for first drafts, refine with stakeholder input
+Document successful prompt patterns for PM tasks
+Combine AI efficiency with human judgment and intuition

✗ Don't

−Don't publish competitive analysis without fact-checking
−Don't finalize user stories without engineering review
−Don't make prioritization decisions solely on AI scoring
−Don't skip customer validation of generated requirements
−Don't ignore company-specific context and culture

💡 Pro Tips

★Provide context: company goals, constraints, customer feedback
★Ask for alternatives: 'Show 3 ways to prioritize this roadmap'
★Request stakeholder-specific formatting: 'Executive summary vs. engineering spec'
★Use skill for 70% generation + 30% customization to company needs

When to Use This

✓ Use when

Use for user story writing, competitive research, roadmap prioritization, stakeholder communication, and PRD drafting. Best for reducing repetitive documentation and research work.

✗ Avoid when

Avoid for strategic product vision (requires deep customer empathy), pricing decisions (needs market and financial expertise), or when face-to-face customer discovery is more valuable than speed.

Learning Path

1Basic: user stories, feature specs, status updates
2Intermediate: competitive analysis, prioritization frameworks, PRDs
3Advanced: product strategy, go-to-market planning, OKR setting
4Expert: product vision, market positioning, business model innovation

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Reviews

4.7★★★★★55 reviews

L
Layla White★★★★★Dec 20, 2024
m15-anti-pattern is among the better-maintained entries we tried; worth keeping pinned for repeat workflows.
L
Layla Tandon★★★★★Dec 8, 2024
We added m15-anti-pattern from the explainx registry; install was straightforward and the SKILL.md answered most questions upfront.
D
Diego Tandon★★★★★Dec 8, 2024
Useful defaults in m15-anti-pattern — fewer surprises than typical one-off scripts, and it plays nicely with `npx skills` flows.
L
Liam Abebe★★★★★Dec 8, 2024
I recommend m15-anti-pattern for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.
P
Pratham Ware★★★★★Dec 4, 2024
I recommend m15-anti-pattern for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.
Y
Yuki Srinivasan★★★★★Nov 27, 2024
Useful defaults in m15-anti-pattern — fewer surprises than typical one-off scripts, and it plays nicely with `npx skills` flows.
N
Neel Bansal★★★★★Nov 27, 2024
We added m15-anti-pattern from the explainx registry; install was straightforward and the SKILL.md answered most questions upfront.
L
Layla Srinivasan★★★★★Nov 11, 2024
Keeps context tight: m15-anti-pattern is the kind of skill you can hand to a new teammate without a long onboarding doc.
L
Layla Wang★★★★★Oct 18, 2024
m15-anti-pattern has been reliable in day-to-day use. Documentation quality is above average for community skills.
L
Lucas Diallo★★★★★Oct 18, 2024
Solid pick for teams standardizing on skills: m15-anti-pattern is focused, and the summary matches what you get after install.

m15-anti-pattern

Install Skill

What it does

Category

Repository

Last updated

Installation Guide

How to use m15-anti-pattern on Cursor

Prerequisites

Run the install command

Select Cursor when prompted

Verify installation

Security Notice

Documentation

Anti-Patterns

Core Question

Anti-Pattern → Better Pattern

Thinking Prompt

Trace Up ↑

Trace Down ↓

Top 5 Beginner Mistakes

Code Smell → Refactoring

Common Error Patterns

Deprecated → Better

Quick Review Checklist

Related Skills

List & Monetize Your Skill

Use Cases

User Story & Requirements Generation

Competitive Analysis

Roadmap Prioritization

Stakeholder Communication

Implementation Guide

Best Practices

When to Use This

Learning Path

Related Skills

grill-me

premortem

deslop

framer-motion

write-a-prd

travel-planner

Reviews

Discussion