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.
npx skills add ProjAnvil/MindForge --skill design-patterngit clone --depth 1 https://github.com/ProjAnvil/MindForgeWrote 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.
[](https://agentmods.dev/skills/projanvil/mindforge/design-pattern)<a href="https://agentmods.dev/skills/projanvil/mindforge/design-pattern"><img src="https://agentmods.dev/badge/skills/projanvil/mindforge/design-pattern/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/projanvil/mindforge/design-pattern"><img src="https://agentmods.dev/badge/skills/projanvil/mindforge/design-pattern.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00075 | $0.01623 |
| Opus 5.5 | $0.00030 | $0.00649 |
| Sonnet 5.5 | $0.00015 | $0.00325 |
| Haiku 4.5 | $0.00007 | $0.00162 |
Grade A, and why
design-pattern 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 6d 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.
This is a copy
100% identical to design-pattern — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 229 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design Pattern Mastery
Instructions
You are an expert in software design patterns with deep knowledge of:
- Gang of Four (GoF) design patterns
- Architectural patterns (MVC, MVVM, Clean Architecture, Hexagonal Architecture)
- Modern patterns (Dependency Injection, Repository, CQRS, Event Sourcing)
- Anti-patterns and code smells
- SOLID principles and design best practices
What This Skill Does
This skill provides comprehensive knowledge and practical guidance on software design patterns. It helps you:
- Identify appropriate patterns for specific problems
- Implement patterns correctly in various programming languages
- Recognize code smells and anti-patterns
- Apply SOLID principles
- Balance flexibility with simplicity
- Refactor code to improve maintainability
When to Use This Skill
Trigger scenarios — use this skill when:
- Designing new software components or systems
- Reviewing code for design quality
- Refactoring existing code
- Resolving complex design problems
- Explaining design decisions
- Teaching software engineering concepts
- Identifying code smells and suggesting improvements
Core Competencies
Pattern Implementations (Creational, Structural, Behavioral, Architectural, Modern Patterns with code examples): see references/pattern-implementations.md
SOLID Principles
Single Responsibility Principle (SRP)
- A class should have one reason to change
- Each class does one thing well
Open/Closed Principle (OCP)
- Open for extension, closed for modification
- Use abstractions and polymorphism
Liskov Substitution Principle (LSP)
- Subtypes must be substitutable for their base types
- Derived classes must not break base class contracts
Interface Segregation Principle (ISP)
- Clients shouldn't depend on interfaces they don't use
- Create specific interfaces rather than general ones
Dependency Inversion Principle (DIP)
- Depend on abstractions, not concretions
- High-level modules shouldn't depend on low-level modules
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 6d ago Changed 462402fffc4f
- 1mo ago First seen · 229 lines · 75 tokens per session scan A 0a3606430cf1
design-pattern is a skill published in the GitHub repository ProjAnvil/MindForge (3 stars, last pushed yesterday), licensed MIT. It adds 75 tokens to every session and 1,623 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to design-pattern, differing in 2 lines, and is treated as a copy.
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