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@ellipsis-dev/sdk

v0.5.0

Published

TypeScript SDK for the Ellipsis agents platform: /v1 REST types + client, the session stream WebSocket client, and the session transcript store.

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hunterbrookshunterbrooks

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Readme

@ellipsis-dev/sdk

TypeScript SDK for the Ellipsis agents platform. Three subpath exports, all dependency-free at runtime:

  • @ellipsis-dev/sdk — generated /v1 REST types + EllipsisClient, a thin typed client over an injected fetchJson.
  • @ellipsis-dev/sdk/stream — the session stream WebSocket client (streamSession): protocol negotiation, heartbeat liveness, reconnect-with-backoff, and lossless resume via the after_seq record cursor. Transport is an injected openSocket, so the same machinery runs in a browser, a terminal, or a server.
  • @ellipsis-dev/sdk/store — SessionTranscriptStore (subscribe/getSnapshot, shaped for React's useSyncExternalStore but framework-free) plus the pure shaping helpers that turn raw session records into renderable transcript items and chat turns.

Types are generated, never hand-written

  • schema/frames.schema.json — JSON Schema of the WebSocket frames, produced from the server's frame models.
  • schema/openapi.v1.json — the OpenAPI document for the SDK's REST surface.

pnpm gen derives src/generated/ from those documents (json-schema-to-typescript + openapi-typescript). CI regenerates and diffs, and the server's own test suite pins the committed schema documents to its models, so types cannot drift from the deployed API in either direction.

test/fixtures/golden_stream.json is a frame sequence recorded from the real server stream loop (ids and timestamps normalized); the store's tests replay it, so client behavior is validated against real emissions, not hand-written examples.

Protocol

The stream protocol (frame taxonomy, delivery classes, resume/close-code contract) is documented at https://www.ellipsis.dev/docs. The compatibility rule clients must follow: ignore unknown frame types and unknown source/record_type/kind values — additive server changes are not a protocol break.