Skill Creator

What I do

I help you design, structure, and create OpenCode Agent Skills that agents can discover and load on-demand. I guide you through the entire skill creation workflow.

When to use me

Use this skill when you need to:

• Create a new reusable agent instruction set
• Package best practices into a discoverable unit
• Share common workflows across your team
• Build Claude-compatible skills for interoperability

Directory Structure

.opencode/
  skill/
    <skill-name>/
      SKILL.md

Or in global config:

~/.config/opencode/skill/<skill-name>/SKILL.md

Or Claude-compatible paths:

.claude/skills/<skill-name>/SKILL.md
~/.claude/skills/<skill-name>/SKILL.md

Frontmatter Reference

---
name: my-skill           # Required: 1-64 chars, lowercase alphanumeric with hyphens
description: What this skill does  # Required: 1-1024 chars
license: MIT             # Optional: SPDX license identifier
compatibility: opencode  # Optional: target platform
metadata:                # Optional: custom key-value pairs
  audience: developers
  workflow: documentation
---

Name Validation Rules

Your skill name must match this regex:

^[a-z0-9]+(-[a-z0-9]+)*$

Permission Configuration

In opencode.json:

{
  "permission": {
    "skill": {
      "my-skill": "allow",
      "experimental-*": "ask",
      "internal-*": "deny",
      "*": "allow"
    }
  }
}

Permission behaviors:

• allow: Agent loads skill immediately
• deny: Skill hidden, access rejected
• ask: User prompted for approval

Complete Example

File: .opencode/skill/code-review/SKILL.md

---
name: code-review
description: Perform thorough code reviews focusing on security, performance, and maintainability
license: MIT
compatibility: opencode
metadata:
  audience: developers
  workflow: quality-assurance
---
## What I do

I analyze code changes and provide constructive feedback on:
- Security vulnerabilities (injection, auth, secrets)
- Performance bottlenecks (N+1 queries, unnecessary loops)
- Code smells and maintainability issues
- Test coverage and edge cases

## When to use me

Use this when reviewing pull requests, merge requests, or before committing changes.

## My workflow

1. Understand the context and scope of changes
2. Identify critical paths and security-sensitive code
3. Check for common anti-patterns
4. Verify test coverage for new functionality
5. Provide actionable feedback with examples

## What I won't do

- Review generated code without context
- Approve changes without human review
- Ignore architectural constraints

## Interaction style

- Be specific: point to exact lines
- Be constructive: suggest improvements
- Be factual: cite best practices

Skill Loading Process

1. Agent calls skill({ name: "my-skill" })
2. OpenCode searches configured skill paths
3. Frontmatter is parsed and validated
4. Full SKILL.md content is returned to agent
5. Agent incorporates skill instructions into context

Best Practices

1. Single responsibility: Each skill should do one thing well
2. Clear description: Help agents decide when to use you
3. Specific instructions: Avoid ambiguity in behavior
4. Examples: Show rather than tell
5. Interaction style: Define how the skill communicates
6. Scope boundaries: Clarify what you won't do

Interoperability

OpenCode skills are compatible with Claude's skill format. You can:

• Use same skill files for both platforms
• Share skills across OpenCode and Claude installations
• Migrate existing Claude skills without modification

Troubleshooting

Quick Reference

---
name: my-new-skill
description: A clear, specific description
---
## What I do
Brief capability summary

## When to use me
Usage context

## My workflow
Step-by-step process

## Interaction style
How I communicate

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