claude-agent-sdk
Build autonomous AI agents with Claude Agent SDK. Structured outputs (v0.1.45, Nov 2025) guarantee JSON schema validation, plugins system, hooks for event-driven workflows. Use when: building coding agents with validated JSON responses, SRE systems, security auditors, or troubleshooting CLI not found, structured output validation, session forking errors.
npx skills add majiayu000/claude-skill-registry --skill claude-agent-sdk-ovachiever-droid-tings --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.
# Claude Agent SDK - Structured Outputs & Error Prevention Guide **Package**: @anthropic-ai/claude-agent-sdk@0.1.50 (Nov 21, 2025) **Breaking Changes**: v0.1.45 - Structured outputs (Nov 2025), v0.1.0 - No default system prompt, settingSources required --- ## What's New in v0.1.45+ (Nov 2025) **Major Features:** ### 1. Structured Outputs (v0.1.45, Nov 14, 2025) - **JSON schema validation** - Guarantees responses match exact schemas - **`outputFormat` parameter** - Define output structure with JSON schema or Zod - **Access validated results** - Via `message.structured_output` - **Beta header required**: `structured-outputs-2025-11-13` - **Type safety** - Full TypeScript inference with Zod schemas **Example:** ```typescript import { query } from "@anthropic-ai/claude-agent-sdk"; import { z } from "zod"; const schema = z.object({ summary: z.string(), sentiment: z.enum(['positive', 'neutral', 'negative']), confidence: z.number().min(0).max(1) }); const response = query({ prompt: "Analyze this code review feedback", options: { model: "claude-sonnet-4-5", outputFormat: { type: "json_schema", json_schema: { name: "AnalysisResult", strict: true, schema: zodToJsonSchema(schema) } } } }); fo
- What's New in v0.1.45+ (Nov 2025)
- 1. Structured Outputs (v0.1.45, Nov 14, 2025)
- 2. Plugins System (v0.1.27)
- 3. Hooks System (v0.1.0+)
- 4. Additional Options
- The Complete Claude Agent SDK Reference
- Table of Contents
- Core Query API
- Tool Integration (Built-in + Custom)
- MCP Servers (Model Context Protocol)
- External MCP Servers (stdio)
- External MCP Servers (HTTP/SSE)
- MCP Tool Naming Convention
- Subagent Orchestration
What does the claude-agent-sdk skill do?
Build autonomous AI agents with Claude Agent SDK. Structured outputs (v0.1.45, Nov 2025) guarantee JSON schema validation, plugins system, hooks for event-driven workflows. Use when: building coding agents with validated JSON responses, SRE systems, security auditors, or troubleshooting CLI not found, structured output validation, session forking errors.
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill claude-agent-sdk-ovachiever-droid-tings --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.