f659eb12bc
This PR depends on [#31296](https://github.com/openai/codex/pull/31296) for the canonical-to-legacy event mappings. ## Description This PR makes dynamic tools emit canonical `TurnItem::DynamicToolCall` lifecycle instead of `DynamicToolCallRequest` / `DynamicToolCallResponse` directly. App-server v2 now sends the client `DynamicToolCall` request from the canonical item start. It ignores the mapped legacy request/response events, so clients receive one item start and one tool request. ## Why Dynamic tools are a separate migration boundary because their start event also drives a client request. Keeping that routing change isolated makes it easier to verify that the request still happens exactly once. ## What changed - Emit in-progress and completed/failed dynamic tool items from the dynamic tool handler. - Move app-server client request dispatch onto canonical dynamic item starts. - Add focused app-server coverage for the canonical start notification and client request.
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