@opencode-ai/sdk-next

Effect-native scoped OpenCode host for in-process applications. This transitional package will replace the existing generated @opencode-ai/sdk after its consumers migrate.

The SDK executes Server's assembled HTTP router in memory. It opens no listener and performs no network I/O, while preserving the same routing, middleware, handlers, codecs, and errors as the network client.

import { OpenCode } from "@opencode-ai/sdk-next"

const opencode = yield * OpenCode.create()
const session = yield * opencode.sessions.get({ sessionID })

It also exports Tool and exposes local-only tools.register(...), replacing the former @opencode-ai/core/public facade. Registration uses Core's host-level ApplicationTools service shared by the host's Locations; each Location retains its own ToolRegistry for overlay, lookup, and settlement. Closing the owning Effect Scope releases router resources, location services, fibers, and scoped tool registrations.

sessions.events({ sessionID, after }) replays durable events after the optional aggregate sequence, then emits newly committed durable events. sessions.interrupt(...) targets execution owned by this host, and sessions.message(...) retrieves one projected Session message.

The same constructor is available as a service Layer:

const program = Effect.gen(function* () {
  const opencode = yield* OpenCode.Service
  return yield* opencode.sessions.get({ sessionID })
})

yield * program.pipe(Effect.provide(OpenCode.layer))

OpenCode.layer adapts OpenCode.create() for dependency injection; it does not define another host implementation.