This skill provides expert guidance for creating, writing, building, and refining Claude Code Skills. It should be used when working with SKILL.md files, authoring new skills, improving existing skills, or understanding skill structure and best practices.
Provides expert guidance for creating, writing, building, and refining Claude Code Skills. Use when working with SKILL.md files, authoring new skills, improving existing skills, or understanding skill structure and best practices.
/plugin marketplace add RBozydar/rbw-claude-code/plugin install core@rbw-claude-codeThis skill inherits all available tools. When active, it can use any tool Claude has access to.
references/api-security.mdreferences/be-clear-and-direct.mdreferences/common-patterns.mdreferences/core-principles.mdreferences/executable-code.mdreferences/iteration-and-testing.mdreferences/recommended-structure.mdreferences/skill-structure.mdreferences/use-xml-tags.mdreferences/using-scripts.mdreferences/using-templates.mdreferences/workflows-and-validation.mdtemplates/router-skill.mdtemplates/simple-skill.mdworkflows/add-reference.mdworkflows/add-script.mdworkflows/add-template.mdworkflows/add-workflow.mdworkflows/audit-skill.mdworkflows/create-domain-expertise-skill.md<essential_principles>
Skills are modular, filesystem-based capabilities that provide domain expertise on demand. This skill teaches how to create effective skills.
All prompting best practices apply. Be clear, be direct, use XML structure. Assume Claude is smart - only add context Claude doesn't have.
When a skill is invoked, Claude reads SKILL.md. Use this guarantee:
skill-name/
├── SKILL.md # Router + principles
├── workflows/ # Step-by-step procedures (FOLLOW)
├── references/ # Domain knowledge (READ)
├── templates/ # Output structures (COPY + FILL)
└── scripts/ # Reusable code (EXECUTE)
SKILL.md asks "what do you want to do?" → routes to workflow → workflow specifies which references to read.
When to use each folder:
No markdown headings (#, ##, ###) in skill body. Use semantic XML tags:
<objective>...</objective>
<process>...</process>
<success_criteria>...</success_criteria>
Keep markdown formatting within content (bold, lists, code blocks).
SKILL.md under 500 lines. Split detailed content into reference files. Load only what's needed for the current workflow. </essential_principles>
<intake> What would you like to do?Wait for response before proceeding. </intake>
<routing> | Response | Next Action | Workflow | |----------|-------------|----------| | 1, "create", "new", "build" | Ask: "Task-execution skill or domain expertise skill?" | Route to appropriate create workflow | | 2, "audit", "modify", "existing" | Ask: "Path to skill?" | Route to appropriate workflow | | 3, "add", "component" | Ask: "Add what? (workflow/reference/template/script)" | workflows/add-{type}.md | | 4, "guidance", "help" | General guidance | workflows/get-guidance.md |Progressive disclosure for option 1 (create):
Progressive disclosure for option 3 (add component):
Intent-based routing (if user provides clear intent without selecting menu):
After reading the workflow, follow it exactly. </routing>
<quick_reference>
Simple skill (single file):
---
name: skill-name
description: What it does and when to use it.
---
<objective>What this skill does</objective>
<quick_start>Immediate actionable guidance</quick_start>
<process>Step-by-step procedure</process>
<success_criteria>How to know it worked</success_criteria>
Complex skill (router pattern):
SKILL.md:
<essential_principles> - Always applies
<intake> - Question to ask
<routing> - Maps answers to workflows
workflows/:
<required_reading> - Which refs to load
<process> - Steps
<success_criteria> - Done when...
references/:
Domain knowledge, patterns, examples
templates/:
Output structures Claude copies and fills
(plans, specs, configs, documents)
scripts/:
Executable code Claude runs as-is
(deploy, setup, API calls, data processing)
</quick_reference>
<reference_index>
All in references/:
<workflows_index>
All in workflows/:
| Workflow | Purpose |
|---|---|
| create-new-skill.md | Build a skill from scratch |
| create-domain-expertise-skill.md | Build exhaustive domain knowledge base for build/ |
| audit-skill.md | Analyze skill against best practices |
| verify-skill.md | Check if content is still accurate |
| add-workflow.md | Add a workflow to existing skill |
| add-reference.md | Add a reference to existing skill |
| add-template.md | Add a template to existing skill |
| add-script.md | Add a script to existing skill |
| upgrade-to-router.md | Convert simple skill to router pattern |
| get-guidance.md | Help decide what kind of skill to build |
| </workflows_index> |
<yaml_requirements>
Required fields:
---
name: skill-name # lowercase-with-hyphens, matches directory
description: ... # What it does AND when to use it (third person)
---
Name conventions: create-*, manage-*, setup-*, generate-*, build-*
</yaml_requirements>
<success_criteria> A well-structured skill:
This skill should be used when the user asks to "create a slash command", "add a command", "write a custom command", "define command arguments", "use command frontmatter", "organize commands", "create command with file references", "interactive command", "use AskUserQuestion in command", or needs guidance on slash command structure, YAML frontmatter fields, dynamic arguments, bash execution in commands, user interaction patterns, or command development best practices for Claude Code.
This skill should be used when the user asks to "create an agent", "add an agent", "write a subagent", "agent frontmatter", "when to use description", "agent examples", "agent tools", "agent colors", "autonomous agent", or needs guidance on agent structure, system prompts, triggering conditions, or agent development best practices for Claude Code plugins.
This skill should be used when the user asks to "create a hook", "add a PreToolUse/PostToolUse/Stop hook", "validate tool use", "implement prompt-based hooks", "use ${CLAUDE_PLUGIN_ROOT}", "set up event-driven automation", "block dangerous commands", or mentions hook events (PreToolUse, PostToolUse, Stop, SubagentStop, SessionStart, SessionEnd, UserPromptSubmit, PreCompact, Notification). Provides comprehensive guidance for creating and implementing Claude Code plugin hooks with focus on advanced prompt-based hooks API.