@agentskit/core

@agentskit/core

The zero-dependency foundation that every AgentsKit package builds on — 5 KB gzipped, edge-ready, works everywhere JavaScript runs.

Tags: ai · agents · llm · agentskit · typescript · orchestration · streaming · chat

Why core

• Zero external dependencies — no npm bloat, no audit surprises; installs in milliseconds and works in Node, Deno, edge runtimes, and the browser
• Stable contracts that unlock the whole ecosystem — six ADR-pinned interfaces (Adapter, Tool, Skill, Memory, Retriever, Runtime) make every package interchangeable
• Chat state machine included — createChatController handles streaming, abort, and message history so you never implement that loop yourself
• Under 10 KB gzipped, always — budget enforced in CI; the foundation you can commit to for the long term

Install

npm install @agentskit/core

Quick example

import { createChatController, createInMemoryMemory } from '@agentskit/core'
import { anthropic } from '@agentskit/adapters'

const controller = createChatController({
  adapter: anthropic({ apiKey: process.env.ANTHROPIC_API_KEY, model: 'claude-sonnet-4-6' }),
  memory: createInMemoryMemory(),
})

await controller.send('Hello!')
console.log(controller.getState().messages)

Features

• createChatController — streaming-capable chat state machine with abort support
• createInMemoryMemory — zero-config in-process memory for prototyping
• TypeScript types for every contract: ToolDefinition, SkillDefinition, AgentEvent, Adapter, Memory, Retriever, RuntimeResult
• Event emitter for AgentEvent streams — observability hooks attach here
• Dual CJS/ESM output, strict TypeScript, no any

Ecosystem

Package	Role
@agentskit/adapters	LLM chat + embedding providers
@agentskit/runtime	createRuntime — agents without UI
@agentskit/react	useChat, headless chat components
@agentskit/tools	Executable tools

Contributors

License

MIT — see LICENSE.

Docs

Full documentation · GitHub