Pattern - Design Pattern Library

Document reusable design patterns with structure, examples, and usage guidelines.

Usage

/pattern [name]
/pattern retry-with-backoff
/pattern worker-coordination

Output: $PROJECT_ROOT/kb/02-patterns/[name].md

Instructions

Language Setting

Check LANGUAGE in docs/current.md. If th, translate output per references/language-guide.md. See references/bash-helpers.md for detection snippet.

1. Parse name → kebab-case filename
2. Ask user about the pattern:
   • What type? (behavioral/structural/creational)
   • What problem does it solve?
   • What language for the example?
3. Generate pattern document
4. Save to kb/02-patterns/[name].md

Template

# [Pattern Name]

| Field | Value |
|-------|-------|
| Type | Behavioral / Structural / Creational |
| Language | [primary language] |
| Tags | [tag1, tag2] |
| Created | YYYY-MM-DD |

## Intent

> One sentence describing what this pattern solves.

## Problem

What situation triggers the need for this pattern?

## Solution

How the pattern addresses the problem.

## Structure

```[language]
// Key interfaces/types

Example

// Complete working example

When to Use

• Situation 1
• Situation 2

When NOT to Use

• Anti-situation 1
• Anti-situation 2

Trade-offs

| Pro | Con | |-----|-----| | [benefit] | [cost] |

Related Patterns

• [Pattern A] - [relationship]
• [Pattern B] - [relationship]

References

• [link or source]

## Related Commands

| Command | Purpose |
|---------|---------|
| `/distill` | Extract patterns from learnings |
| `/example` | Save code examples |
| `/pattern` | Document patterns (you are here) |
| `/search` | Find existing patterns |