Guidelines
akash-network/node
Behavioral guidelines to reduce common LLM coding mistakes. An agent skill from akash-network/node.
A skill your agent uses when reviewing code for anti-patterns.
Install M15 Anti Pattern
$ npx skills add fjrevoredo/mini-diarium --skill m15-anti-pattern -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install fjrevoredo/mini-diarium m15-anti-pattern --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/fjrevoredo/mini-diarium.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/m15-anti-pattern .claude/skills/m15-anti-pattern && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "m15-anti-pattern" agent skill from https://github.com/fjrevoredo/mini-diarium/tree/master/.agents/skills/m15-anti-pattern into .claude/skills/m15-anti-pattern/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "m15-anti-pattern", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/fjrevoredo/mini-diarium/tree/master/.agents/skills/m15-anti-patternType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add fjrevoredo/mini-diarium --skill m15-anti-pattern -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install fjrevoredo/mini-diarium m15-anti-pattern --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/fjrevoredo/mini-diarium.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/m15-anti-pattern .agents/skills/m15-anti-pattern && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "m15-anti-pattern" agent skill from https://github.com/fjrevoredo/mini-diarium/tree/master/.agents/skills/m15-anti-pattern into .agents/skills/m15-anti-pattern/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "m15-anti-pattern", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add fjrevoredo/mini-diarium --skill m15-anti-pattern -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install fjrevoredo/mini-diarium m15-anti-pattern --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/fjrevoredo/mini-diarium.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/m15-anti-pattern .cursor/skills/m15-anti-pattern && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "m15-anti-pattern" agent skill from https://github.com/fjrevoredo/mini-diarium/tree/master/.agents/skills/m15-anti-pattern into .cursor/skills/m15-anti-pattern/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "m15-anti-pattern", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/fjrevoredo/mini-diarium.git --path .agents/skills/m15-anti-pattern--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add fjrevoredo/mini-diarium --skill m15-anti-pattern -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install fjrevoredo/mini-diarium m15-anti-pattern --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/fjrevoredo/mini-diarium.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/m15-anti-pattern .gemini/skills/m15-anti-pattern && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "m15-anti-pattern" agent skill from https://github.com/fjrevoredo/mini-diarium/tree/master/.agents/skills/m15-anti-pattern into .gemini/skills/m15-anti-pattern/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "m15-anti-pattern", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install fjrevoredo/mini-diarium m15-anti-patternInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add fjrevoredo/mini-diarium --skill m15-anti-pattern -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/fjrevoredo/mini-diarium.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/m15-anti-pattern .github/skills/m15-anti-pattern && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "m15-anti-pattern" agent skill from https://github.com/fjrevoredo/mini-diarium/tree/master/.agents/skills/m15-anti-pattern into .github/skills/m15-anti-pattern/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "m15-anti-pattern", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add fjrevoredo/mini-diarium --skill m15-anti-pattern -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install fjrevoredo/mini-diarium m15-anti-pattern --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/fjrevoredo/mini-diarium.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/m15-anti-pattern .opencode/skills/m15-anti-pattern && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "m15-anti-pattern" agent skill from https://github.com/fjrevoredo/mini-diarium/tree/master/.agents/skills/m15-anti-pattern into .opencode/skills/m15-anti-pattern/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "m15-anti-pattern", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
m15-anti-pattern- GitHub stars
- 308
- Used in
- 1 other repo
- Token cost
- ~1.2k tokens
- SKILL.md length
- 423 words
- Files
- 2
- Skills in repo
- 41
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses when reviewing code for anti-patterns.
- Works in 3 steps: Is this symptom or cause? → What would idiomatic code look like? → Does this fight Rust?
- Reviewing code for anti-patterns
- SKILL.md covers Core Question, Anti-Pattern → Better Pattern, Thinking Prompt and Trace Up ↑, plus 7 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
M15 Anti Pattern is an agent skill from fjrevoredo/mini-diarium. Use when reviewing code for anti-patterns. Keywords: anti-pattern, common mistake, pitfall, code smell, bad practice, code review, is this an anti-pattern, better way to do this, common mistake to avoid, why is this bad, idiomatic way, beginner mistake, fighting borrow checker, clone everywhere, unwrap in production, should I refactor, 反模式, 常见错误, 代码异味, 最佳实践, 地道写法
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `patterns/common-mistakes.md`).
It sits in Development, covering Refactoring. The repository describes itself as: A local-only journal with serious encryption. Free, open source, and never touches the internet. The licence is MIT.
When your agent uses it
- Reviewing code for anti-patterns
- Tasks that involve Refactoring
Example prompts
- “/m15-anti-pattern”
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- Is this symptom or cause?
- What would idiomatic code look like?
- Does this fight Rust?
What it can do on your machine
Read from SKILL.md and the folder at commit eed457f. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
M15 Anti Pattern loads about 1.2k tokens when it runs. Until then it costs about 96 tokens; SKILL.md has 423 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from fjrevoredo/mini-diarium at commit eed457f, republished under its MIT licence (© fjrevoredo). 423 words, ~1,192 tokens.
Download SKILL.mdSave it as
.claude/skills/m15-anti-pattern/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- m15-anti-pattern
- description
- Use when reviewing code for anti-patterns. Keywords: anti-pattern, common mistake, pitfall, code smell, bad practice, code review, is this an anti-pattern, better way to do this, common mistake to avoid, why is this bad, idiomatic way, beginner mistake, fighting borrow checker, clone everywhere, unwrap in production, should I refactor, 反模式, 常见错误, 代码异味, 最佳实践, 地道写法
- user-invocable
- false
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 messageTop 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 |
Show full SKILL.md (175 more words)Show less
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
pubfields with invariants - No index loops when iterator works
- No
Stringwhere&strsuffices - No ignored
#[must_use]warnings - No
unsafewithout 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 |
© fjrevoredo, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file in .agents/skills/m15-anti-pattern of fjrevoredo/mini-diarium.
- SKILL.md
- patterns/common-mistakes.md
Open the folder on GitHubat commit eed457f
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in fjrevoredo/mini-diarium, which our catalogue first saw on October 7, 2026.
Compare with similar skills
M15 Anti Pattern next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| M15 Anti Pattern this skillfjrevoredo/mini-diarium | 308 | 1 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Guidelinesakash-network/node | 1.1k | 20 repos | ~577 | Automated safety check: Pass | MIT | |
| Component Refactoringlangflow-ai/langflow | 155k | — | ~3.5k | Automated safety check: Pass | MIT | |
| Migrate Core Code to Submodulestinyhumansai/openhuman | 42k | — | ~2.6k | Automated safety check: Pass | GPL-3.0 | |
| ast-grep Structural Searchcode-yeongyu/oh-my-openagent | 70k | — | ~3.3k | Automated safety check: Pass | MIT | |
| Systematic Code Refactoringluongnv89/claude-howto | 42k | — | ~3k | Automated safety check: Pass | MIT |
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Component Refactoring
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Refactor high-complexity React components in Langflow frontend.
Migrate Core Code to Submodules
tinyhumansai/openhuman
Plans and carries out moving non-host-specific code and its tests from the OpenHuman core into vendored tiny submodule libraries, then releases the submodule and re-pins the host.
ast-grep Structural Search
code-yeongyu/oh-my-openagent
Searches and rewrites code by syntax-tree shape across 25 languages with ast-grep, for codemods, structural queries and YAML lint rules, using a Python wrapper script.
Systematic Code Refactoring
luongnv89/claude-howto
Guides refactoring in phases based on Martin Fowler's method: research, test coverage check, planning and small tested steps, with your approval at each phase.
Codex
skills-directory/skill-codex
A skill your agent uses when the user asks to run Codex CLI (codex exec, codex resume) or references OpenAI Codex for code analysis, refactoring, or automated editing
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Related
Categories
Questions about M15 Anti Pattern
What does M15 Anti Pattern do?
A skill your agent uses when reviewing code for anti-patterns. M15 Anti Pattern is an agent skill from fjrevoredo/mini-diarium. Use when reviewing code for anti-patterns.
When should I use M15 Anti Pattern?
M15 Anti Pattern fits situations like: reviewing code for anti-patterns; tasks that involve Refactoring.
How do I install M15 Anti Pattern in Claude Code?
Run `npx skills add fjrevoredo/mini-diarium --skill m15-anti-pattern -a claude-code`. Or copy the skill folder (.agents/skills/m15-anti-pattern in fjrevoredo/mini-diarium) into .claude/skills/m15-anti-pattern in your project. Claude Code loads it when a task matches its description.
How do I install M15 Anti Pattern in Codex?
Run `npx skills add fjrevoredo/mini-diarium --skill m15-anti-pattern -a codex`. Or copy the skill folder (.agents/skills/m15-anti-pattern in fjrevoredo/mini-diarium) into .agents/skills/m15-anti-pattern in your project. Codex loads it when a task matches its description.
Can I use M15 Anti Pattern in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add fjrevoredo/mini-diarium --skill m15-anti-pattern -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/m15-anti-pattern, .gemini/skills/m15-anti-pattern, .github/skills/m15-anti-pattern and .opencode/skills/m15-anti-pattern in your project.
What does M15 Anti Pattern need to run?
SKILL.md names no scripts, command-line tools or credentials: M15 Anti Pattern is instructions for the agent only.
Does M15 Anti Pattern access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is M15 Anti Pattern safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does M15 Anti Pattern use?
M15 Anti Pattern is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does M15 Anti Pattern use?
About 1.2k tokens (SKILL.md is roughly 4.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to M15 Anti Pattern?
Skills that share tags, products or a category with M15 Anti Pattern: Guidelines (akash-network/node, 1.1k stars), Component Refactoring (langflow-ai/langflow, 155k stars), Migrate Core Code to Submodules (tinyhumansai/openhuman, 42k stars) and ast-grep Structural Search (code-yeongyu/oh-my-openagent, 70k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains M15 Anti Pattern?
fjrevoredo (a GitHub user) maintains it in fjrevoredo/mini-diarium, which has 308 GitHub stars. The repository holds 41 skills in this directory. The repository was last updated on October 9, 2026.
Source: fjrevoredo/mini-diarium on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.