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Cover mixed existing-item references and new message inputs through synchronous and asynchronous Realtime `response.create()` and `send()`. Assert the complete encoded request, including the event ID, reference fields, item order, Unicode content and response settings. The explicitly typed fixture also checks the public input types at all four call sites. Validation: four local WebSocket peer cases against the qualified 3.42.1 wheel; focused type, Ruff format/lint and diff checks pass. --------- Co-authored-by: markstuart-oai <[email protected]>

`ResponsesWebSocketAccumulator` now tracks reasoning, shell, interpreter and tool status progress, plus queued response metadata. Status accumulation covers code interpreter, file/web search, image generation and MCP calls. `detailed_snapshot()` exposes these observations; terminal responses remain authoritative. Shell observations use indexed command facts. Done events retain every output row for their command, including empty arrays, outcomes and metadata. Whole-item output stays authoritative without guessing command boundaries or inventing outcomes. The helper buffers fragments and indexes command counts by call ID, avoiding repeated scans of retained output. Detailed full items retain omitted, null and present ID fields. Function and custom tool records that omit ID bind their first matching progress ID; explicit-null, present-ID and unscaffolded replacement policies remain compatible. Validation: focused accumulator checks pass with Python 3.10/Pydantic v1 and Python 3.13/Pydantic v2. Ruff, formatting and ty pass. Regressions cover all 28 rich progress/status tags, reasoning parts, queued refresh, sparse shell observations, full completion arrays, metadata presence and identity guards. --------- Co-authored-by: markstuart-oai <[email protected]>

A slow WebSocket lane currently closes the managed session when its event queue fills. Add `isolate_lane_overflow=True` to the sync and async session constructors. With this option, healthy lanes keep using the same connection. The default remains `False`. Failed lanes discard queued events and collected response state. Reads keep raising the first buffer error. Their IDs stay reserved until reconnect. The guide explains how the session frees space when its queues fill. It also explains which events become unavailable when the default lane fails. Physical connection failures still end the session. This uses the existing router and reader, without new limits or dependencies. Validation: all 200 focused session cases pass on Python 3.10/Pydantic 1 and Python 3.13/Pydantic 2. They cover both policies, all queue budgets, eviction, cached finals, default routing, transport failure and reconnect. Pinned Ruff, format and ty checks pass. Co-authored-by: markstuart-oai <[email protected]>

Expose additional Live Responses delegation tools and tool choices in session creation and updates while preserving the existing Python function and MCP choice types and field contracts. MCP tool-choice `name` remains required and non-null. The MCP tool input currently exposes only `type: "mcp"`; server configuration fields are not typed by this change. Validation: 20 focused compatibility and offline transport tests passed, including session creation and update; Ruff and ty passed for the committed transport regression. Co-authored-by: dpiet-oai <[email protected]>

Automated Release PR --- ## [3.43.0](v3.42.1...v3.43.0) (2026-11-03) ### Features * **api:** expand Live Responses delegation tools ([#4233](#4233)) ([f6e8480](f6e8480)) * **responses:** accumulate rich WebSocket progress ([#4224](#4224)) ([48cdad3](48cdad3)) * **responses:** add WebSocket lane overflow isolation ([#4225](#4225)) ([16bdad1](16bdad1)) ### Chores * **deps:** bump actions/setup-node from 4.4.0 to 7.1.0 ([#4229](#4229)) ([abbfb27](abbfb27)) * **deps:** bump actions/setup-python from 7.0.0 to 7.1.0 ([#4232](#4232)) ([49f9a59](49f9a59)) * **deps:** bump pypa/gh-action-pypi-publish from 1.14.2 to 1.14.3 ([#4228](#4228)) ([f43f29b](f43f29b)) --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please). Co-authored-by: openai-sdks[bot] <284451331+openai-sdks[bot]@users.noreply.github.com>

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