How do I install m15-anti-pattern?

Run `npx skills add https://github.com/actionbook/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 actionbook.

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/actionbook/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 actionbook.

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/actionbook/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 actionbook.

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/actionbook/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 actionbook.

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/actionbook/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 actionbook.

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/actionbook/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 actionbook.

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/actionbook/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 actionbook.

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/actionbook/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 actionbook.

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/actionbook/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 actionbook.

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/actionbook/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 actionbook.

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/actionbook/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▌

actionbook/rust-skills · updated Apr 8, 2026

MDX-style export adds YAML metadata + attribution linking explainx.ai and this canonical listing URL.

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

0 commentsdiscussion

summary

Layer 2: Design Choices

skill.md

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

how to use m15-anti-pattern

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 development machine
›Node.js version 16.0+ with npm package manager (verify with node --version)
›Active project directory or workspace where you want to add m15-anti-pattern

Execute installation command

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

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

The skills CLI fetches m15-anti-pattern from GitHub repository actionbook/rust-skills and configures it for Cursor.

Select Cursor when prompted

The CLI will show a list of available agents. Use arrow keys to navigate and space to select Cursor:

◆ Which agents do you want to install to?

│

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

│ • Amp

│ • Antigravity

│ • Cline

│ • Codex

│ ●Cursor(selected)

│ • Cursor

│ • Windsurf

Verify installation

Confirm successful installation by checking the skill directory location:

.cursor/skills/m15-anti-pattern

Reload or restart Cursor to activate m15-anti-pattern. Access the skill through slash commands (e.g., /m15-anti-pattern) or your agent's skill management interface.

⚠

Security & Verification 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 development environment. Always verify the publisher's identity, review recent commits, and test in isolated environments before production deployment.

Additional Resources

›View source code on GitHub ›Skills CLI documentation ›Learn more about Cursor ›What are agent skills?

List & Monetize Your Skill

Submit your Claude Code skill and start earning

GET_STARTED →

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

Installation Steps

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

Discussion

Product Hunt–style comments (not star reviews)

No comments yet — start the thread.

general reviews

Ratings

4.6★★★★★69 reviews

★★★★★Daniel Mehta· Dec 28, 2024
I recommend m15-anti-pattern for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.
★★★★★Kabir Sethi· Dec 16, 2024
Keeps context tight: m15-anti-pattern is the kind of skill you can hand to a new teammate without a long onboarding doc.
★★★★★Tariq Abebe· Dec 12, 2024
We added m15-anti-pattern from the explainx registry; install was straightforward and the SKILL.md answered most questions upfront.
★★★★★Daniel Thomas· Dec 12, 2024
Registry listing for m15-anti-pattern matched our evaluation — installs cleanly and behaves as described in the markdown.
★★★★★Harper Torres· Nov 27, 2024
m15-anti-pattern is among the better-maintained entries we tried; worth keeping pinned for repeat workflows.
★★★★★Nia Wang· Nov 19, 2024
Keeps context tight: m15-anti-pattern is the kind of skill you can hand to a new teammate without a long onboarding doc.
★★★★★Valentina Sanchez· Nov 7, 2024
m15-anti-pattern is among the better-maintained entries we tried; worth keeping pinned for repeat workflows.
★★★★★Arya Liu· Nov 7, 2024
I recommend m15-anti-pattern for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.
★★★★★Chen Ramirez· Nov 3, 2024
Useful defaults in m15-anti-pattern — fewer surprises than typical one-off scripts, and it plays nicely with `npx skills` flows.
★★★★★Kofi Farah· Nov 3, 2024
m15-anti-pattern reduced setup friction for our internal harness; good balance of opinion and flexibility.

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