skill-builder

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Interactive wizard for creating Claude Code skills. Use when scaffolding new skills, validating skill structure, managing dependencies, or editing skill configuration files.

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Sourcejaganpro/claude-code-sfskills
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NPX Install

npx skill4agent add jaganpro/claude-code-sfskills skill-builder

SKILL.md Content

Skill-Builder: Claude Code Skill Creation Wizard

Expert skill architect for Claude Code. Help users create well-structured, validated skills through an interactive wizard process.

Core Responsibilities

  1. Interactive Skill Creation: Step-by-step wizard to create new skills
  2. Template Application: Apply minimal-starter template with custom metadata
  3. Deep Validation: Validate YAML frontmatter, tool permissions, structure
  4. Bulk Validation: Validate all installed skills with comprehensive reporting
  5. Interactive Editor (v2.0): Terminal-based editor for refining skills
  6. Dependency Management (v2.0): Check, validate, visualize skill dependencies
  7. Testing Support: Verify skills work after creation
  8. Best Practices: Educate on skill design patterns

Skill Creation Workflow

Phase 1: Information Gathering

Use AskUserQuestion to collect (in sequence):
#QuestionFormatValidation
1Skill nameTextkebab-case required
2DescriptionTextOne clear sentence
3AuthorTextOptional
4Tools neededMulti-selectFrom valid tools list
5Optional componentsMulti-selectREADME, examples/, templates/, scripts/, docs/
6TagsTextComma-separated
7LocationChoiceGlobal (~/.claude/skills/) or Project (.claude/skills/)
Valid tools: Bash, Read, Write, Edit, Glob, Grep, WebFetch, AskUserQuestion, TodoWrite, SlashCommand, Skill, BashOutput, KillShell

Phase 2: Scaffolding

  1. Determine path: Global → 
    ~/.claude/skills/{name}/
    | Project → 
    .claude/skills/{name}/
  2. Check existing: If exists, ask to overwrite
  3. Create structure:
    bash
    mkdir -p {base_path}
# Create optional dirs based on selection: examples/, templates/, scripts/, docs/
  4. Load template:
    • Marketplace: 
      Read: ~/.claude/plugins/marketplaces/sf-skills/skill-builder/templates/minimal-starter.md
    • Project: 
      Read: [project-root]/skill-builder/templates/minimal-starter.md
  5. Replace placeholders: {{SKILL_NAME}}, {{SKILL_DESCRIPTION}}, {{VERSION}}, {{AUTHOR}}, {{TAGS}}, {{ALLOWED_TOOLS}}
  6. Write files: SKILL.md + optional README.md, examples/example-usage.md

Phase 3: Deep Validation

bash
python3 ${CLAUDE_PLUGIN_ROOT}/scripts/validate_yaml.py {base_path}/SKILL.md
Validation checks:
  • YAML syntax valid
  • Required fields: name, description, version
  • Name is kebab-case
  • Version is semver (X.Y.Z)
  • All tools in allowed-tools are valid (case-sensitive)
  • SKILL.md has content after frontmatter
If validation fails: Report errors with line numbers and fixes. See 
docs/validation-errors.md
(in skill-builder folder) for detailed examples.

Phase 4: Testing (Optional)

Ask: "Test this skill now?" → Explain restart required, provide invocation example.

Phase 5: Completion Summary

✓ Skill '{name}' created successfully!
📍 Location: {full_path}
📄 Files: SKILL.md [+ README.md, examples/, ...]

Next Steps:
1. Customize SKILL.md with your logic
2. Restart Claude Code to load skill
3. Test: "Use the {name} skill to [task]"

Resources: `docs/skill-structure.md`, `docs/frontmatter-reference.md`, `docs/best-practices.md` (in skill-builder folder)

Validation Errors

ErrorFix
YAML syntaxQuote strings with 
:
or 
#
Missing fieldAdd required field to frontmatter
Invalid toolUse exact case: 
Bash
not 
bash
Bad versionUse X.Y.Z format
Bad nameUse kebab-case
See 
docs/validation-errors.md
(in skill-builder folder) for details.

Bulk Validation (v2.0)

When user asks to validate all skills:
bash
python3 ${CLAUDE_PLUGIN_ROOT}/scripts/bulk_validate.py [--errors-only] [--format json]
Interpret results: Total skills, valid count, warnings, errors. Guide fixes: Use interactive editor or manual edits.
See 
docs/workflow-examples.md
(in skill-builder folder) for output examples.

Interactive Editor (v2.0)

For editing existing skills:
bash
python3 ${CLAUDE_PLUGIN_ROOT}/scripts/interactive_editor.py /path/to/skill/
Features: Real-time validation, field editing, tool management, preview changes, auto-backup.
Commands: 
[e]
Edit field | 
[t]
Manage tools | 
[v]
Validate | 
[s]
Save | 
[r]
Reload | 
[q]
Quit
See docs/workflow-examples.md for UI example.

Dependency Management (v2.0)

Dependency syntax in SKILL.md:
yaml
dependencies:
  - name: other-skill
    version: ">=1.2.0"  # or ^1.2.0, ~1.2.0, *, exact
    required: true
Version constraints: 
^
(compatible) | 
~
(approximate) | 
>=
| exact | 
*
(any)
Commands:
bash
python3 ${CLAUDE_PLUGIN_ROOT}/scripts/dependency_manager.py check my-skill      # Check deps
python3 ${CLAUDE_PLUGIN_ROOT}/scripts/dependency_manager.py tree my-skill       # Visualize tree
python3 ${CLAUDE_PLUGIN_ROOT}/scripts/dependency_manager.py circular my-skill   # Detect cycles
python3 ${CLAUDE_PLUGIN_ROOT}/scripts/dependency_manager.py validate --all      # Validate all
See 
docs/workflow-examples.md
(in skill-builder folder) for output examples.

Patterns & Best Practices

Skill types: Code analysis (Glob→Read→Grep→Report) | Documentation (Read→Write) | Interactive (AskUserQuestion→Validate→Execute) | Testing (Bash→Analyze→Report)
Best practices: Single responsibility | Clear kebab-case names | Minimal tools | Include examples | Proper semver

Troubleshooting

IssueCheck
Creation failsPermissions on ~/.claude/skills/, Python 3, disk space
Validation failsYAML syntax, tool case-sensitivity (
Bash
not 
bash
)
Skill doesn't loadRestart Claude Code, verify path, check frontmatter

Notes

  • Restart Claude Code after creating skills
  • Test with real scenarios
  • This meta-skill can create other meta-skills!

License

MIT License. See LICENSE file. Copyright (c) 2024-2025 Jag Valaiyapathy