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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.118 ·

Sessions V2 Client (SSE Transport) [In Development]

Entry
JSON All of v2.1.118
EntryKind: in v2.1.118,
Bug FixesSection of the release
What

A complete replacement for the WebSocket-based SessionsWebSocket client, using Server-Sent Events (SSE) over HTTP.

Status

Infrastructure added. The new SessionsV2Client coexists with the old WebSocket client.

Details
  • Uses /events/stream SSE endpoint for receiving events (replacing WebSocket)
  • Uses POST /events for sending events (replacing WebSocket send)
  • Includes reconnection budget tracking with backoff
  • Supports from_sequence_num for event replay on reconnect
  • Liveness timeout detection with automatic reconnection
  • Force reconnect capability
  • Full control request/response protocol over HTTP
Evidence

New client class (search for "SessionsV2Client") with log prefixes like "[SessionsV2Client] Connecting to", "[SessionsV2Client] Connected", etc.

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.118 →

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