diff --git a/fern/changelog/2025-05-31.mdx b/fern/changelog/2025-05-31.mdx
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+# SIP Call Error Handling Updates
+
+The following specific SIP error codes have been added to help identify call failures:
+
+<CodeBlocks>
+- `call.in-progress.error-sip-inbound-call-failed-to-connect`
+- `call.in-progress.error-providerfault-outbound-sip-403-forbidden`
+- `call.in-progress.error-providerfault-outbound-sip-407-proxy-authentication-required`
+- `call.in-progress.error-providerfault-outbound-sip-503-service-unavailable`
+- `call.in-progress.error-providerfault-outbound-sip-480-temporarily-unavailable`
+- `call.in-progress.error-sip-outbound-call-failed-to-connect`
+- `call.in-progress.error-vapifault-worker-died`
+</CodeBlocks>
+
+<Warning>
+  The generic error code `call.in-progress.error-sip-telephony-provider-failed-to-connect-call` has been removed. Update your error handling to use the new specific error codes instead.
+</Warning>
diff --git a/fern/changelog/2025-06-03.mdx b/fern/changelog/2025-06-03.mdx
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+# Azure OpenAI Compatibility Mode and JSON Schema Updates
+
+1. **`toolStrictCompatibilityMode` for Azure OpenAI Models**: Added a new option to handle Azure OpenAI's validation limitations. Set `toolStrictCompatibilityMode` in your `OpenAIModel` config to either:
+   - `strip-parameters-with-unsupported-validation`: Removes entire parameters that have unsupported validations
+   - `strip-unsupported-validation`: Keeps parameters but removes unsupported validation aspects
+   Default is `strip-unsupported-validation`.
diff --git a/fern/changelog/2025-06-04.mdx b/fern/changelog/2025-06-04.mdx
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+## 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>
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