@agentskit/runtime — for agents

Standalone agent runtime (ReAct loop) + speculate + topologies + durable execution + background agents.

Purpose

Run an agent without a UI. Supports reflection, planning, multi-agent orchestration, durable step logs, cron + webhooks, speculative execution.

Install

npm install @agentskit/runtime

Primary exports

createRuntime({ adapter, tools, memory, skills, observers, ... }) — one-line agent; runtime.run(task) returns { content, steps, ... }.
createSharedContext — typed shared context across tools.
speculate({ candidates, pick, timeoutMs }) — race adapters, abort losers. See Speculative execution.
supervisor, swarm, hierarchical, blackboard — multi-agent topologies. See Topologies.
createDurableRunner + createInMemoryStepLog / createFileStepLog — Temporal-style step-log durability. See Durable execution.
createCronScheduler (5-field cron + every:<ms>) + createWebhookHandler — background agents. See Background agents.

Minimal example

import { createRuntime } from '@agentskit/runtime'
import { anthropic } from '@agentskit/adapters'

const runtime = createRuntime({
  adapter: anthropic({ apiKey: process.env.ANTHROPIC_API_KEY!, model: 'claude-sonnet-4-6' }),
})

const result = await runtime.run('Summarize the quarterly report.')
console.log(result.content)

Common patterns

Survive crashes: wrap side effects in runner.step(id, fn) (durable).
A/B across models: speculate or replayAgainst.
Compose agents: supervisor / swarm / hierarchical / blackboard.
React to events: createWebhookHandler + createCronScheduler.

Source

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