# Advanced Skill Creator

> Advanced patterns for creating complex, multi-step skills with error handling and state management.

- Skill: `majiayu000/advanced-skill-creator-2` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/advanced-skill-creator-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/advanced-skill-creator-2/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Research & Search
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/advanced-skill-creator-2

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# Advanced Skill Creator

Advanced patterns for creating complex, multi-step skills with error handling and state management.

## When to Use

- Multi-step workflows with dependencies
- Skills requiring state persistence
- Complex error handling scenarios
- Integration with external APIs

## Patterns

### State Machine Pattern

```yaml
# STATE.yaml
step: 2
status: in_progress
completed:
  - step_1_auth
remaining:
  - step_2_fetch
  - step_3_process
errors: []
```

### Error Recovery

```python
# Retry with backoff
for attempt in range(3):
    try:
        result = api.call()
        break
    except APIError as e:
        if attempt == 2:
            raise
        time.sleep(2 ** attempt)
```

## Best Practices

1. Define clear entry/exit points
2. Validate inputs before processing
3. Log all state transitions
4. Provide rollback on failure