Add changelog for 2025-06-04

Author: quantstruct-bot

fern/changelog/2025-06-04.mdx

@@ -0,0 +1,27 @@
+## Assistant Configuration Updates 
+
+1. **Set Minimum Messages for Analysis**: Skip analysis for very short conversations by setting `Assistant.analysisPlan.minMessagesThreshold` (default: 2).
+
+2. **Configure Transfer Timeout**: You can now set the timeout for warm transfer modes with `Assistant.hooks.do[type=transfer].destination.transferPlan.timeout` (default: 60). Warm transfer modes allow for a smooth handoff between agents by maintaining context and conversation history during the transfer process. 
+
+   <Tip>
+   This timeout setting determines how long the system will wait for the transfer to complete before timing out.
+   </Tip>
+
+
+3. **Enable AssemblyAI Universal Streaming API**: You can now enable the new Universal Streaming API for AssemblyAI transcribers with `Assistant.transcriber.enableUniversalStreamingApi` and `Assistant.transcriber.fallbackPlan.transcribers.enableUniversalStreamingApi`.
+
+   <Tip>
+   Set this to `true` to use AssemblyAI's new Universal Streaming API for improved transcription.
+   </Tip>
+
+
+<Warning>
+   **Removal of regex in JsonSchema**: You can no longer use regular expressions in your [JSON schema validations](https://api.vapi.ai/api#:~:text=JsonSchema).
+   
+   **Dot paths affected:**
+   - `assistant.analysisPlan.structuredDataPlan.schema.regex`
+   - `assistant.hooks.do[type=function].function.parameters.properties.regex`
+   - `assistant.model.tools[type=apiRequest].body.regex`
+   - `assistant.model.tools[type=apiRequest].headers.regex`
+</Warning>