# Developmental

> Development and growth processes

- Skill: `ffsshhttiikk/developmental` (Agent Skill)
- Install (CLI): `npx skillmds@latest add ffsshhttiikk/developmental`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ffsshhttiikk/developmental/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Marketing & Growth
- License: MIT
- Author: ffsshhttiikk (https://skillmd.com/u/ffsshhttiikk)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/ffsshhttiikk/developmental

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## What I do

- Explain fundamental developmental processes
- Describe cell differentiation and fate
- Discuss pattern formation mechanisms
- Analyze growth regulation
- Explain metamorphosis and aging
- Connect genetics to development

## When to use me

- When learning about developmental biology basics
- When explaining how organisms develop
- When studying growth and differentiation
- When connecting genes to phenotype
- When preparing educational content

## Key Concepts

### Core Developmental Processes

1. **Cell Division**: Mitosis, asymmetric division
2. **Cell Differentiation**: Specialization into cell types
3. **Cell Migration**: Movement during morphogenesis
4. **Apoptosis**: Programmed cell death
5. **Growth**: Cell expansion and division

### Signaling in Development

- Autocrine: Cell to itself
- Paracrine: To neighboring cells
- Juxtacrine: Contact-dependent
- Endocrine: Via bloodstream

### Types of Development

**Direct Development**
- No larval stage
- Direct to adult form

**Indirect Development**
- Egg → Larva → Pupa → Adult
- Complete metamorphosis
- Incomplete metamorphosis

### Stem Cells

- Pluripotent: Any cell type (embryonic)
- Multipotent: Related cell types (adult)
- Unipotent: Single cell type