custom-agent-design
Design custom agents from scratch using Claude Agent SDK patterns. Use when building domain-specific agents, designing agents with full SDK control, or creating specialized agents with custom tools and prompts.
npx skills add majiayu000/claude-skill-registry --skill custom-agent-design --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Custom Agent Design Skill Design domain-specific agents using Claude Agent SDK patterns. ## Purpose Guide the design of custom agents that solve domain-specific problems with full SDK control over Context, Model, Prompt, and Tools. ## When to Use - Building a new custom agent - Converting generic workflow to specialized agent - Designing domain-specific automation - Creating repeatable agent patterns ## Prerequisites - Clear understanding of the domain problem - Access to Claude Agent SDK documentation - Understanding of when custom agents are appropriate (see @agent-evolution-path.md) ## Design Process ### Step 1: Define Agent Purpose Answer these questions: - What specific problem does this agent solve? - What domain expertise does it need? - What is the single purpose? (One agent, one purpose) - Who are the stakeholders? **Output**: Purpose statement (2-3 sentences) ### Step 2: Select Model Choose based on task complexity: | Task Type | Model | Why | | --- | --- | --- | | Simple transformations | Haiku | Fast, cheap | | Balanced tasks | Sonnet | Good trade-off | | Complex reasoning | Opus | Highest quality | **Decision factors**: - Speed requirements - Quality requirements - C
- Purpose
- When to Use
- Prerequisites
- Design Process
- Step 1: Define Agent Purpose
- Step 2: Select Model
- Step 3: Design System Prompt
- Step 4: Configure Tool Access
- Step 5: Add Governance (Optional)
- Step 6: Select Deployment Form
- Step 7: Create Configuration
- Output Format
- Design Checklist
- Anti-Patterns
What does the custom-agent-design skill do?
Design custom agents from scratch using Claude Agent SDK patterns. Use when building domain-specific agents, designing agents with full SDK control, or creating specialized agents with custom tools and prompts.
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill custom-agent-design --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From majiayu000/claude-skill-registry, a repository with 534 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.