Build autonomous AI agents with structured JSON validation, event-driven hooks, and 14 documented error preventions.

• Structured outputs (v0.1.45+) guarantee JSON schema validation with full TypeScript inference via Zod or raw schemas
• 12 hook events (PreToolUse, PostToolUse, SubagentStart, SubagentStop, etc.) enable event-driven workflows, custom permission logic, and cleanup patterns
• MCP server integration supports stdio, HTTP, and SSE transports with tool naming conventions and strict configuration validation
• Session management includes forking for safe exploration, V2 preview APIs for simpler multi-turn patterns, and file checkpointing for rollback capability
• Permission control via canUseTool callbacks and sandbox settings for secure execution with auto-approval logic and excluded command lists
• Prevents 14 documented issues including CLI not found, context length session-breaking, MCP config gotchas (missing type field), Unicode line separator parsing, and subagent cleanup orphaning