Writing Skills (Excellence)

Dispatcher for skill creation excellence. Use the decision tree below to find the right template and standards.

Quick Decision Tree

What do you need to do?

1. Create a NEW skill:

   • Is it simple (single file, <200 lines)? → Tier 1 Architecture
   • Is it complex (multi-concept, 200-1000 lines)? → Tier 2 Architecture
   • Is it a massive platform (10+ products, AWS, Convex)? → Tier 3 Architecture

2. Improve an EXISTING skill:

   • Fix "it's too long" -> Modularize (Tier 3)
   • Fix "AI ignores rules" -> Anti-Rationalization
   • Fix "users can't find it" -> CSO (Search Optimization)

3. Verify Compliance:

   • Check metadata/naming -> Standards
   • Add tests -> Testing Guide

Component Index

Component	Purpose
CSO	"SEO for LLMs". How to write descriptions that trigger.
Standards	File naming, YAML frontmatter, directory structure.
Anti-Rationalization	How to write rules that agents won't ignore.
Testing	How to ensure your skill actually works.

Templates

• Technique Skill (How-to)
• Reference Skill (Docs)
• Discipline Skill (Rules)
• Pattern Skill (Design Patterns)

When to Use

• Creating a NEW skill from scratch
• Improving an EXISTING skill that agents ignore
• Debugging why a skill isn't being triggered
• Standardizing skills across a team

How It Works

1. Identify goal → Use decision tree above
2. Select template → From references/templates/
3. Apply CSO → Optimize description for discovery
4. Add anti-rationalization → For discipline skills
5. Test → RED-GREEN-REFACTOR cycle

Quick Example

---
name: my-technique
description: Use when [specific symptom occurs].
metadata:
  category: technique
  triggers: error-text, symptom, tool-name
---

# My Technique

## When to Use
- [Symptom A]
- [Error message]

Common Mistakes

Mistake	Fix
Description summarizes workflow	Use "Use when..." triggers only
No metadata.triggers	Add 3+ keywords
Generic name ("helper")	Use gerund (creating-skills)
Long monolithic SKILL.md	Split into references/

See gotchas.md for more.

Pre-Deploy Checklist

Before deploying any skill:

• name field matches directory name exactly
• SKILL.md filename is ALL CAPS
• Description starts with "Use when..."
• metadata.triggers has 3+ keywords
• Total lines < 500 (use references/ for more)
• No @ force-loading in cross-references
• Tested with real scenarios

Related Skills

• opencode-expert: For OpenCode environment configuration
• Use /write-skill command for guided skill creation

Examples

Create a Tier 1 skill:

mkdir -p ~/.config/opencode/skills/my-technique
touch ~/.config/opencode/skills/my-technique/SKILL.md

Create a Tier 2 skill:

mkdir -p ~/.config/opencode/skills/my-skill/references/core
touch ~/.config/opencode/skills/my-skill/{SKILL.md,gotchas.md}
touch ~/.config/opencode/skills/my-skill/references/core/README.md

Limitations

• Use this skill only when the task clearly matches the scope described above.
• Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.