Public API

Functions

Export	Description
createAgent(options)	Creates an in-memory Agent instance.
query(params)	One-shot async generator helper.
tool(name, description, inputSchema, handler)	Creates a custom tool definition.
skill(options)	Creates an in-memory skill definition.
loadSkill(path)	Loads a skill from a directory containing SKILL.md.
createClaudeCodeTools(options)	Creates opt-in Claude Code-style built-in tools.

Agent

const agent = createAgent(options);

for await (const message of agent.query(prompt)) {
  console.log(message);
}

const result = await agent.prompt(prompt);

Types

Export	Description
SDKMessage	Union of all emitted SDK events.
AgentOptions	Agent construction options.
ToolDefinition	Tool shape passed to an agent.
SkillDefinition	Reusable instruction bundle passed to an agent.
PermissionDecision	Allow or deny decision returned by a permission callback.
ModelClient	Interface for custom or mocked model clients.

Errors

Error	Description
APIError	Provider request or response failure.
ToolExecutionError	Tool handler failure.
MaxTurnsError	Agent loop reached maxTurns.
AbortError	Request was aborted.