Changelog

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All notable changes to Issho are documented in this file.

The format follows Keep a Changelog, and Issho follows Semantic Versioning.

[0.1.0] - 2026-10-21

The first release: the server core, Issho.Live, agents from Elixir, and the browser client's core. The cursor overlay, following, the bindings of Kotoba and Masu, MCP and the installer come next.

Added

  • The contracts: Issho.Actor, Issho.Identity, Issho.Policy, Issho.Engine, Issho.Place, Issho.Binding and Issho.Store.
  • Issho.Authority: one process per document across a cluster that orders transactions, applies each once (receipts), saves with the store's compare-and-swap before it confirms and broadcasts, keeps a journal, and reads any revision of the epoch.
  • Issho.Engine.Map, the engine of shared maps and of the tests.
  • Issho.Store.Memory, for development and tests.
  • Issho.Channel and Issho.Token: rooms joined with signed tokens, the policy asked on join, on every message and before each change goes out, read-only tokens, nested documents of a room, and Issho.revoke/3.
  • Issho.Presence and Issho.Awareness: who is in a room, and where, in batched frames per room and node.
  • Issho.join_as/4 and Issho.Participant: agents and jobs in a room from Elixir.
  • Issho.Test: an isolated instance per test, and replays?/2.
  • The browser client (assets/, bundled by mix issho.build): Room over a pluggable transport (phoenixTransport, with sockets shared by the rooms of a page and tokens renewed), Presence, Awareness (sent latest-wins, received per node), and SharedDocument (local changes at once, one transaction in flight, others' changes replayed under pending ones, refusals, gaps, reconnects that resend only what the server lacks).
  • The map engine's TypeScript twin, and test/corpus, cases both engines must pass.
  • An end-to-end test: two clients over WebSockets on a real endpoint.
  • Drafts: pending transactions kept per tab session across reloads, in IndexedDB or memory, sent when the document opens again; a draft of another epoch is reported and kept aside.
  • Document specs from server code (Issho.Documents.open/4), documents with no store (Issho.Store.None), and :on_transaction hooks, run once per accepted transaction before it is saved, able to refuse it.
  • Issho.Live: a LiveView in a room, the same session as a channel's, with the room's events sent to its components or to the LiveView.