diff --git a/.changeset/fix-anthropic-multi-turn-tool-calls.md b/.changeset/fix-anthropic-multi-turn-tool-calls.md
deleted file mode 100644
index 34553ecec..000000000
--- a/.changeset/fix-anthropic-multi-turn-tool-calls.md
+++ /dev/null
@@ -1,35 +0,0 @@
----
-'@tanstack/ai': patch
-'@tanstack/ai-client': patch
-'@tanstack/ai-anthropic': patch
-'@tanstack/ai-gemini': patch
----
-
-fix(ai, ai-client, ai-anthropic, ai-gemini): fix multi-turn conversations failing after tool calls
-
-**Core (@tanstack/ai):**
-
-- Lazy assistant message creation: `StreamProcessor` now defers creating the assistant message until the first content-bearing chunk arrives (text, tool call, thinking, or error), eliminating empty `parts: []` messages from appearing during auto-continuation when the model returns no content
-- Add `prepareAssistantMessage()` (lazy) alongside deprecated `startAssistantMessage()` (eager, backwards-compatible)
-- Add `getCurrentAssistantMessageId()` to check if a message was created
-- **Rewrite `uiMessageToModelMessages()` to preserve part ordering**: the function now walks parts sequentially instead of separating by type, producing correctly interleaved assistant/tool messages (text1 + toolCall1 → toolResult1 → text2 + toolCall2 → toolResult2) instead of concatenating all text and batching all tool calls. This fixes multi-round tool flows where the model would see garbled conversation history and re-call tools unnecessarily.
-- Deduplicate tool result messages: when a client tool has both a `tool-result` part and a `tool-call` part with `output`, only one `role: 'tool'` message is emitted per tool call ID
-
-**Client (@tanstack/ai-client):**
-
-- Update `ChatClient.processStream()` to use lazy assistant message creation, preventing UI flicker from empty messages being created then removed
-
-**Anthropic:**
-
-- Fix consecutive user-role messages violating Anthropic's alternating role requirement by merging them in `formatMessages`
-- Deduplicate `tool_result` blocks with the same `tool_use_id`
-- Filter out empty assistant messages from conversation history
-- Suppress duplicate `RUN_FINISHED` event from `message_stop` when `message_delta` already emitted one
-- Fix `TEXT_MESSAGE_END` incorrectly emitting for `tool_use` content blocks
-- Add Claude Opus 4.6 model support with adaptive thinking and effort parameter
-
-**Gemini:**
-
-- Fix consecutive user-role messages violating Gemini's alternating role requirement by merging them in `formatMessages`
-- Deduplicate `functionResponse` parts with the same name (tool call ID)
-- Filter out empty model messages from conversation history
diff --git a/.changeset/tighten-adapter-contract.md b/.changeset/tighten-adapter-contract.md
deleted file mode 100644
index 78a7af3f5..000000000
--- a/.changeset/tighten-adapter-contract.md
+++ /dev/null
@@ -1,25 +0,0 @@
----
-'@tanstack/ai': minor
-'@tanstack/ai-anthropic': minor
-'@tanstack/ai-gemini': minor
----
-
-Tighten the AG-UI adapter contract and simplify the core stream processor.
-
-**Breaking type changes:**
-
-- `TextMessageContentEvent.delta` is now required (was optional)
-- `StepFinishedEvent.delta` is now required (was optional)
-
-All first-party adapters already sent `delta` on every event, so this is a type-level enforcement of existing behavior. Community adapters that follow the reference implementations will not need code changes.
-
-**Core processor simplifications:**
-
-- `TEXT_MESSAGE_START` now resets text segment state, replacing heuristic overlap detection
-- `TOOL_CALL_END` is now the authoritative signal for tool call input completion
-- Removed delta/content fallback logic, whitespace-only message cleanup, and finish-reason conflict arbitration from the processor
-
-**Adapter fixes:**
-
-- Gemini: filter whitespace-only text parts, fix STEP_FINISHED content accumulation, emit fresh TEXT_MESSAGE_START after tool calls
-- Anthropic: emit fresh TEXT_MESSAGE_START after tool_use blocks for proper text segmentation
diff --git a/examples/ts-svelte-chat/CHANGELOG.md b/examples/ts-svelte-chat/CHANGELOG.md
index 8a0ab92cd..19dd8e314 100644
--- a/examples/ts-svelte-chat/CHANGELOG.md
+++ b/examples/ts-svelte-chat/CHANGELOG.md
@@ -1,5 +1,18 @@
 # ts-svelte-chat
 
+## 0.1.11
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+  - @tanstack/ai-client@0.4.4
+  - @tanstack/ai-anthropic@0.5.0
+  - @tanstack/ai-gemini@0.5.0
+  - @tanstack/ai-ollama@0.5.0
+  - @tanstack/ai-openai@0.5.0
+  - @tanstack/ai-svelte@0.5.0
+
 ## 0.1.10
 
 ### Patch Changes
diff --git a/examples/ts-svelte-chat/package.json b/examples/ts-svelte-chat/package.json
index c98dcaa05..acab1ed5a 100644
--- a/examples/ts-svelte-chat/package.json
+++ b/examples/ts-svelte-chat/package.json
@@ -1,7 +1,7 @@
 {
   "name": "ts-svelte-chat",
   "private": true,
-  "version": "0.1.10",
+  "version": "0.1.11",
   "type": "module",
   "scripts": {
     "dev": "vite dev --port 3000",
diff --git a/examples/ts-vue-chat/CHANGELOG.md b/examples/ts-vue-chat/CHANGELOG.md
index 9d5142adb..94a6bed41 100644
--- a/examples/ts-vue-chat/CHANGELOG.md
+++ b/examples/ts-vue-chat/CHANGELOG.md
@@ -1,5 +1,19 @@
 # ts-vue-chat
 
+## 0.1.11
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+  - @tanstack/ai-client@0.4.4
+  - @tanstack/ai-anthropic@0.5.0
+  - @tanstack/ai-gemini@0.5.0
+  - @tanstack/ai-ollama@0.5.0
+  - @tanstack/ai-openai@0.5.0
+  - @tanstack/ai-vue@0.5.0
+  - @tanstack/ai-vue-ui@0.1.9
+
 ## 0.1.10
 
 ### Patch Changes
diff --git a/examples/ts-vue-chat/package.json b/examples/ts-vue-chat/package.json
index 39710b4d3..e94fe96e1 100644
--- a/examples/ts-vue-chat/package.json
+++ b/examples/ts-vue-chat/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ts-vue-chat",
-  "version": "0.1.10",
+  "version": "0.1.11",
   "private": true,
   "type": "module",
   "scripts": {
diff --git a/examples/vanilla-chat/CHANGELOG.md b/examples/vanilla-chat/CHANGELOG.md
index 999f574ec..17433a348 100644
--- a/examples/vanilla-chat/CHANGELOG.md
+++ b/examples/vanilla-chat/CHANGELOG.md
@@ -1,5 +1,12 @@
 # vanilla-chat
 
+## 0.0.13
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai-client@0.4.4
+
 ## 0.0.12
 
 ### Patch Changes
diff --git a/examples/vanilla-chat/package.json b/examples/vanilla-chat/package.json
index 321515447..d4ba014f1 100644
--- a/examples/vanilla-chat/package.json
+++ b/examples/vanilla-chat/package.json
@@ -2,7 +2,7 @@
   "name": "vanilla-chat",
   "private": true,
   "type": "module",
-  "version": "0.0.12",
+  "version": "0.0.13",
   "scripts": {
     "start": "vite --port 3001",
     "dev": "vite --port 3001",
diff --git a/packages/typescript/ai-anthropic/CHANGELOG.md b/packages/typescript/ai-anthropic/CHANGELOG.md
index fc6093a81..245ab88c5 100644
--- a/packages/typescript/ai-anthropic/CHANGELOG.md
+++ b/packages/typescript/ai-anthropic/CHANGELOG.md
@@ -1,5 +1,56 @@
 # @tanstack/ai-anthropic
 
+## 0.5.0
+
+### Minor Changes
+
+- Tighten the AG-UI adapter contract and simplify the core stream processor. ([#275](https://github.com/TanStack/ai/pull/275))
+
+  **Breaking type changes:**
+  - `TextMessageContentEvent.delta` is now required (was optional)
+  - `StepFinishedEvent.delta` is now required (was optional)
+
+  All first-party adapters already sent `delta` on every event, so this is a type-level enforcement of existing behavior. Community adapters that follow the reference implementations will not need code changes.
+
+  **Core processor simplifications:**
+  - `TEXT_MESSAGE_START` now resets text segment state, replacing heuristic overlap detection
+  - `TOOL_CALL_END` is now the authoritative signal for tool call input completion
+  - Removed delta/content fallback logic, whitespace-only message cleanup, and finish-reason conflict arbitration from the processor
+
+  **Adapter fixes:**
+  - Gemini: filter whitespace-only text parts, fix STEP_FINISHED content accumulation, emit fresh TEXT_MESSAGE_START after tool calls
+  - Anthropic: emit fresh TEXT_MESSAGE_START after tool_use blocks for proper text segmentation
+
+### Patch Changes
+
+- fix(ai, ai-client, ai-anthropic, ai-gemini): fix multi-turn conversations failing after tool calls ([#275](https://github.com/TanStack/ai/pull/275))
+
+  **Core (@tanstack/ai):**
+  - Lazy assistant message creation: `StreamProcessor` now defers creating the assistant message until the first content-bearing chunk arrives (text, tool call, thinking, or error), eliminating empty `parts: []` messages from appearing during auto-continuation when the model returns no content
+  - Add `prepareAssistantMessage()` (lazy) alongside deprecated `startAssistantMessage()` (eager, backwards-compatible)
+  - Add `getCurrentAssistantMessageId()` to check if a message was created
+  - **Rewrite `uiMessageToModelMessages()` to preserve part ordering**: the function now walks parts sequentially instead of separating by type, producing correctly interleaved assistant/tool messages (text1 + toolCall1 → toolResult1 → text2 + toolCall2 → toolResult2) instead of concatenating all text and batching all tool calls. This fixes multi-round tool flows where the model would see garbled conversation history and re-call tools unnecessarily.
+  - Deduplicate tool result messages: when a client tool has both a `tool-result` part and a `tool-call` part with `output`, only one `role: 'tool'` message is emitted per tool call ID
+
+  **Client (@tanstack/ai-client):**
+  - Update `ChatClient.processStream()` to use lazy assistant message creation, preventing UI flicker from empty messages being created then removed
+
+  **Anthropic:**
+  - Fix consecutive user-role messages violating Anthropic's alternating role requirement by merging them in `formatMessages`
+  - Deduplicate `tool_result` blocks with the same `tool_use_id`
+  - Filter out empty assistant messages from conversation history
+  - Suppress duplicate `RUN_FINISHED` event from `message_stop` when `message_delta` already emitted one
+  - Fix `TEXT_MESSAGE_END` incorrectly emitting for `tool_use` content blocks
+  - Add Claude Opus 4.6 model support with adaptive thinking and effort parameter
+
+  **Gemini:**
+  - Fix consecutive user-role messages violating Gemini's alternating role requirement by merging them in `formatMessages`
+  - Deduplicate `functionResponse` parts with the same name (tool call ID)
+  - Filter out empty model messages from conversation history
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+
 ## 0.4.2
 
 ### Patch Changes
diff --git a/packages/typescript/ai-anthropic/package.json b/packages/typescript/ai-anthropic/package.json
index eecbe2a68..84b318080 100644
--- a/packages/typescript/ai-anthropic/package.json
+++ b/packages/typescript/ai-anthropic/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-anthropic",
-  "version": "0.4.2",
+  "version": "0.5.0",
   "description": "Anthropic Claude adapter for TanStack AI",
   "author": "",
   "license": "MIT",
diff --git a/packages/typescript/ai-client/CHANGELOG.md b/packages/typescript/ai-client/CHANGELOG.md
index 9f384597e..3f5a9ad90 100644
--- a/packages/typescript/ai-client/CHANGELOG.md
+++ b/packages/typescript/ai-client/CHANGELOG.md
@@ -1,5 +1,37 @@
 # @tanstack/ai-client
 
+## 0.4.4
+
+### Patch Changes
+
+- fix(ai, ai-client, ai-anthropic, ai-gemini): fix multi-turn conversations failing after tool calls ([#275](https://github.com/TanStack/ai/pull/275))
+
+  **Core (@tanstack/ai):**
+  - Lazy assistant message creation: `StreamProcessor` now defers creating the assistant message until the first content-bearing chunk arrives (text, tool call, thinking, or error), eliminating empty `parts: []` messages from appearing during auto-continuation when the model returns no content
+  - Add `prepareAssistantMessage()` (lazy) alongside deprecated `startAssistantMessage()` (eager, backwards-compatible)
+  - Add `getCurrentAssistantMessageId()` to check if a message was created
+  - **Rewrite `uiMessageToModelMessages()` to preserve part ordering**: the function now walks parts sequentially instead of separating by type, producing correctly interleaved assistant/tool messages (text1 + toolCall1 → toolResult1 → text2 + toolCall2 → toolResult2) instead of concatenating all text and batching all tool calls. This fixes multi-round tool flows where the model would see garbled conversation history and re-call tools unnecessarily.
+  - Deduplicate tool result messages: when a client tool has both a `tool-result` part and a `tool-call` part with `output`, only one `role: 'tool'` message is emitted per tool call ID
+
+  **Client (@tanstack/ai-client):**
+  - Update `ChatClient.processStream()` to use lazy assistant message creation, preventing UI flicker from empty messages being created then removed
+
+  **Anthropic:**
+  - Fix consecutive user-role messages violating Anthropic's alternating role requirement by merging them in `formatMessages`
+  - Deduplicate `tool_result` blocks with the same `tool_use_id`
+  - Filter out empty assistant messages from conversation history
+  - Suppress duplicate `RUN_FINISHED` event from `message_stop` when `message_delta` already emitted one
+  - Fix `TEXT_MESSAGE_END` incorrectly emitting for `tool_use` content blocks
+  - Add Claude Opus 4.6 model support with adaptive thinking and effort parameter
+
+  **Gemini:**
+  - Fix consecutive user-role messages violating Gemini's alternating role requirement by merging them in `formatMessages`
+  - Deduplicate `functionResponse` parts with the same name (tool call ID)
+  - Filter out empty model messages from conversation history
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+
 ## 0.4.3
 
 ### Patch Changes
diff --git a/packages/typescript/ai-client/package.json b/packages/typescript/ai-client/package.json
index 680e37f57..214facffa 100644
--- a/packages/typescript/ai-client/package.json
+++ b/packages/typescript/ai-client/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-client",
-  "version": "0.4.3",
+  "version": "0.4.4",
   "description": "Framework-agnostic headless client for TanStack AI",
   "author": "",
   "license": "MIT",
diff --git a/packages/typescript/ai-devtools/CHANGELOG.md b/packages/typescript/ai-devtools/CHANGELOG.md
index e6378e35a..7ed1fef3f 100644
--- a/packages/typescript/ai-devtools/CHANGELOG.md
+++ b/packages/typescript/ai-devtools/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @tanstack/ai-devtools-core
 
+## 0.3.3
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+
 ## 0.3.2
 
 ### Patch Changes
diff --git a/packages/typescript/ai-devtools/package.json b/packages/typescript/ai-devtools/package.json
index dc38c3c3e..04e8ff088 100644
--- a/packages/typescript/ai-devtools/package.json
+++ b/packages/typescript/ai-devtools/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-devtools-core",
-  "version": "0.3.2",
+  "version": "0.3.3",
   "description": "Core TanStack AI Devtools",
   "author": "",
   "license": "MIT",
diff --git a/packages/typescript/ai-gemini/CHANGELOG.md b/packages/typescript/ai-gemini/CHANGELOG.md
index 69f753a6b..88f0a3001 100644
--- a/packages/typescript/ai-gemini/CHANGELOG.md
+++ b/packages/typescript/ai-gemini/CHANGELOG.md
@@ -1,5 +1,56 @@
 # @tanstack/ai-gemini
 
+## 0.5.0
+
+### Minor Changes
+
+- Tighten the AG-UI adapter contract and simplify the core stream processor. ([#275](https://github.com/TanStack/ai/pull/275))
+
+  **Breaking type changes:**
+  - `TextMessageContentEvent.delta` is now required (was optional)
+  - `StepFinishedEvent.delta` is now required (was optional)
+
+  All first-party adapters already sent `delta` on every event, so this is a type-level enforcement of existing behavior. Community adapters that follow the reference implementations will not need code changes.
+
+  **Core processor simplifications:**
+  - `TEXT_MESSAGE_START` now resets text segment state, replacing heuristic overlap detection
+  - `TOOL_CALL_END` is now the authoritative signal for tool call input completion
+  - Removed delta/content fallback logic, whitespace-only message cleanup, and finish-reason conflict arbitration from the processor
+
+  **Adapter fixes:**
+  - Gemini: filter whitespace-only text parts, fix STEP_FINISHED content accumulation, emit fresh TEXT_MESSAGE_START after tool calls
+  - Anthropic: emit fresh TEXT_MESSAGE_START after tool_use blocks for proper text segmentation
+
+### Patch Changes
+
+- fix(ai, ai-client, ai-anthropic, ai-gemini): fix multi-turn conversations failing after tool calls ([#275](https://github.com/TanStack/ai/pull/275))
+
+  **Core (@tanstack/ai):**
+  - Lazy assistant message creation: `StreamProcessor` now defers creating the assistant message until the first content-bearing chunk arrives (text, tool call, thinking, or error), eliminating empty `parts: []` messages from appearing during auto-continuation when the model returns no content
+  - Add `prepareAssistantMessage()` (lazy) alongside deprecated `startAssistantMessage()` (eager, backwards-compatible)
+  - Add `getCurrentAssistantMessageId()` to check if a message was created
+  - **Rewrite `uiMessageToModelMessages()` to preserve part ordering**: the function now walks parts sequentially instead of separating by type, producing correctly interleaved assistant/tool messages (text1 + toolCall1 → toolResult1 → text2 + toolCall2 → toolResult2) instead of concatenating all text and batching all tool calls. This fixes multi-round tool flows where the model would see garbled conversation history and re-call tools unnecessarily.
+  - Deduplicate tool result messages: when a client tool has both a `tool-result` part and a `tool-call` part with `output`, only one `role: 'tool'` message is emitted per tool call ID
+
+  **Client (@tanstack/ai-client):**
+  - Update `ChatClient.processStream()` to use lazy assistant message creation, preventing UI flicker from empty messages being created then removed
+
+  **Anthropic:**
+  - Fix consecutive user-role messages violating Anthropic's alternating role requirement by merging them in `formatMessages`
+  - Deduplicate `tool_result` blocks with the same `tool_use_id`
+  - Filter out empty assistant messages from conversation history
+  - Suppress duplicate `RUN_FINISHED` event from `message_stop` when `message_delta` already emitted one
+  - Fix `TEXT_MESSAGE_END` incorrectly emitting for `tool_use` content blocks
+  - Add Claude Opus 4.6 model support with adaptive thinking and effort parameter
+
+  **Gemini:**
+  - Fix consecutive user-role messages violating Gemini's alternating role requirement by merging them in `formatMessages`
+  - Deduplicate `functionResponse` parts with the same name (tool call ID)
+  - Filter out empty model messages from conversation history
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+
 ## 0.4.1
 
 ### Patch Changes
diff --git a/packages/typescript/ai-gemini/package.json b/packages/typescript/ai-gemini/package.json
index 6d5fb2aa7..adc204409 100644
--- a/packages/typescript/ai-gemini/package.json
+++ b/packages/typescript/ai-gemini/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-gemini",
-  "version": "0.4.1",
+  "version": "0.5.0",
   "description": "Google Gemini adapter for TanStack AI",
   "author": "",
   "license": "MIT",
diff --git a/packages/typescript/ai-grok/CHANGELOG.md b/packages/typescript/ai-grok/CHANGELOG.md
index 9c4dd05d1..fdc55668e 100644
--- a/packages/typescript/ai-grok/CHANGELOG.md
+++ b/packages/typescript/ai-grok/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @tanstack/ai-grok
 
+## 0.5.0
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+
 ## 0.4.1
 
 ### Patch Changes
diff --git a/packages/typescript/ai-grok/package.json b/packages/typescript/ai-grok/package.json
index 2dfc12706..06960f258 100644
--- a/packages/typescript/ai-grok/package.json
+++ b/packages/typescript/ai-grok/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-grok",
-  "version": "0.4.1",
+  "version": "0.5.0",
   "description": "Grok (xAI) adapter for TanStack AI",
   "author": "",
   "license": "MIT",
diff --git a/packages/typescript/ai-ollama/CHANGELOG.md b/packages/typescript/ai-ollama/CHANGELOG.md
index 0baf65dee..516b50f34 100644
--- a/packages/typescript/ai-ollama/CHANGELOG.md
+++ b/packages/typescript/ai-ollama/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @tanstack/ai-ollama
 
+## 0.5.0
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+
 ## 0.4.0
 
 ### Patch Changes
diff --git a/packages/typescript/ai-ollama/package.json b/packages/typescript/ai-ollama/package.json
index 66a89e97e..e1d960523 100644
--- a/packages/typescript/ai-ollama/package.json
+++ b/packages/typescript/ai-ollama/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-ollama",
-  "version": "0.4.0",
+  "version": "0.5.0",
   "description": "Ollama adapter for TanStack AI",
   "author": "",
   "license": "MIT",
diff --git a/packages/typescript/ai-openai/CHANGELOG.md b/packages/typescript/ai-openai/CHANGELOG.md
index 58bb832d1..9fa7490e8 100644
--- a/packages/typescript/ai-openai/CHANGELOG.md
+++ b/packages/typescript/ai-openai/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @tanstack/ai-openai
 
+## 0.5.0
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+
 ## 0.4.0
 
 ### Patch Changes
diff --git a/packages/typescript/ai-openai/package.json b/packages/typescript/ai-openai/package.json
index f6c6d3744..ba40cee7a 100644
--- a/packages/typescript/ai-openai/package.json
+++ b/packages/typescript/ai-openai/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-openai",
-  "version": "0.4.0",
+  "version": "0.5.0",
   "description": "OpenAI adapter for TanStack AI",
   "author": "",
   "license": "MIT",
diff --git a/packages/typescript/ai-openrouter/CHANGELOG.md b/packages/typescript/ai-openrouter/CHANGELOG.md
index acc6a33f9..c73941555 100644
--- a/packages/typescript/ai-openrouter/CHANGELOG.md
+++ b/packages/typescript/ai-openrouter/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @tanstack/ai-openrouter
 
+## 0.5.0
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+
 ## 0.4.2
 
 ### Patch Changes
diff --git a/packages/typescript/ai-openrouter/package.json b/packages/typescript/ai-openrouter/package.json
index 7147daf2e..6db6744ad 100644
--- a/packages/typescript/ai-openrouter/package.json
+++ b/packages/typescript/ai-openrouter/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-openrouter",
-  "version": "0.4.2",
+  "version": "0.5.0",
   "description": "OpenRouter adapter for TanStack AI",
   "author": "",
   "license": "MIT",
diff --git a/packages/typescript/ai-preact/CHANGELOG.md b/packages/typescript/ai-preact/CHANGELOG.md
index 53e0b91ff..ff3b3316a 100644
--- a/packages/typescript/ai-preact/CHANGELOG.md
+++ b/packages/typescript/ai-preact/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @tanstack/ai-preact
 
+## 0.5.3
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+  - @tanstack/ai-client@0.4.4
+
 ## 0.5.2
 
 ### Patch Changes
diff --git a/packages/typescript/ai-preact/package.json b/packages/typescript/ai-preact/package.json
index 62c8330f9..9209dbe3b 100644
--- a/packages/typescript/ai-preact/package.json
+++ b/packages/typescript/ai-preact/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-preact",
-  "version": "0.5.2",
+  "version": "0.5.3",
   "description": "Preact hooks for TanStack AI",
   "author": "",
   "license": "MIT",
diff --git a/packages/typescript/ai-react-ui/CHANGELOG.md b/packages/typescript/ai-react-ui/CHANGELOG.md
index 3b2144710..a967661e4 100644
--- a/packages/typescript/ai-react-ui/CHANGELOG.md
+++ b/packages/typescript/ai-react-ui/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @tanstack/ai-react-ui
 
+## 0.5.1
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai-client@0.4.4
+  - @tanstack/ai-react@0.5.1
+
 ## 0.5.0
 
 ### Patch Changes
diff --git a/packages/typescript/ai-react-ui/package.json b/packages/typescript/ai-react-ui/package.json
index 26b6c5ea8..d3c17e6e8 100644
--- a/packages/typescript/ai-react-ui/package.json
+++ b/packages/typescript/ai-react-ui/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-react-ui",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "Headless React components for building AI chat interfaces",
   "module": "./dist/esm/index.js",
   "types": "./dist/esm/index.d.ts",
diff --git a/packages/typescript/ai-react/CHANGELOG.md b/packages/typescript/ai-react/CHANGELOG.md
index f1a560246..3e5aa7fa3 100644
--- a/packages/typescript/ai-react/CHANGELOG.md
+++ b/packages/typescript/ai-react/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @tanstack/ai-react
 
+## 0.5.3
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+  - @tanstack/ai-client@0.4.4
+
 ## 0.5.2
 
 ### Patch Changes
diff --git a/packages/typescript/ai-react/package.json b/packages/typescript/ai-react/package.json
index a9036014e..4dedb1699 100644
--- a/packages/typescript/ai-react/package.json
+++ b/packages/typescript/ai-react/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-react",
-  "version": "0.5.2",
+  "version": "0.5.3",
   "description": "React hooks for TanStack AI",
   "author": "",
   "license": "MIT",
diff --git a/packages/typescript/ai-solid-ui/CHANGELOG.md b/packages/typescript/ai-solid-ui/CHANGELOG.md
index 7bbbd8ffc..1432490e8 100644
--- a/packages/typescript/ai-solid-ui/CHANGELOG.md
+++ b/packages/typescript/ai-solid-ui/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @tanstack/ai-solid-ui
 
+## 0.5.1
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai-client@0.4.4
+  - @tanstack/ai-solid@0.5.1
+
 ## 0.5.0
 
 ### Patch Changes
diff --git a/packages/typescript/ai-solid-ui/package.json b/packages/typescript/ai-solid-ui/package.json
index c815b9377..00ee08498 100644
--- a/packages/typescript/ai-solid-ui/package.json
+++ b/packages/typescript/ai-solid-ui/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-solid-ui",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "Headless Solid components for building AI chat interfaces",
   "module": "./src/index.ts",
   "types": "./src/index.ts",
diff --git a/packages/typescript/ai-solid/CHANGELOG.md b/packages/typescript/ai-solid/CHANGELOG.md
index 92956adb1..a9d577264 100644
--- a/packages/typescript/ai-solid/CHANGELOG.md
+++ b/packages/typescript/ai-solid/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @tanstack/ai-solid
 
+## 0.5.3
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+  - @tanstack/ai-client@0.4.4
+
 ## 0.5.2
 
 ### Patch Changes
diff --git a/packages/typescript/ai-solid/package.json b/packages/typescript/ai-solid/package.json
index 8d84f46d2..4cde97843 100644
--- a/packages/typescript/ai-solid/package.json
+++ b/packages/typescript/ai-solid/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-solid",
-  "version": "0.5.2",
+  "version": "0.5.3",
   "description": "Solid hooks for TanStack AI",
   "author": "",
   "license": "MIT",
diff --git a/packages/typescript/ai-svelte/CHANGELOG.md b/packages/typescript/ai-svelte/CHANGELOG.md
index 47e827466..7912fe497 100644
--- a/packages/typescript/ai-svelte/CHANGELOG.md
+++ b/packages/typescript/ai-svelte/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @tanstack/ai-svelte
 
+## 0.5.3
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+  - @tanstack/ai-client@0.4.4
+
 ## 0.5.2
 
 ### Patch Changes
diff --git a/packages/typescript/ai-svelte/package.json b/packages/typescript/ai-svelte/package.json
index 7f3761694..8f49e3e35 100644
--- a/packages/typescript/ai-svelte/package.json
+++ b/packages/typescript/ai-svelte/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-svelte",
-  "version": "0.5.2",
+  "version": "0.5.3",
   "description": "Svelte bindings for TanStack AI",
   "author": "",
   "license": "MIT",
diff --git a/packages/typescript/ai-vue-ui/CHANGELOG.md b/packages/typescript/ai-vue-ui/CHANGELOG.md
index 58a283340..7348ea9cd 100644
--- a/packages/typescript/ai-vue-ui/CHANGELOG.md
+++ b/packages/typescript/ai-vue-ui/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @tanstack/ai-vue-ui
 
+## 0.1.9
+
+### Patch Changes
+
+- Updated dependencies []:
+  - @tanstack/ai-vue@0.5.3
+
 ## 0.1.8
 
 ### Patch Changes
diff --git a/packages/typescript/ai-vue-ui/package.json b/packages/typescript/ai-vue-ui/package.json
index 57902f376..90dd25823 100644
--- a/packages/typescript/ai-vue-ui/package.json
+++ b/packages/typescript/ai-vue-ui/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-vue-ui",
-  "version": "0.1.8",
+  "version": "0.1.9",
   "description": "Headless Vue components for building AI chat interfaces",
   "module": "./src/index.ts",
   "types": "./src/index.ts",
diff --git a/packages/typescript/ai-vue/CHANGELOG.md b/packages/typescript/ai-vue/CHANGELOG.md
index 5bdddd1aa..665c9cfdc 100644
--- a/packages/typescript/ai-vue/CHANGELOG.md
+++ b/packages/typescript/ai-vue/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @tanstack/ai-vue
 
+## 0.5.3
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+  - @tanstack/ai-client@0.4.4
+
 ## 0.5.2
 
 ### Patch Changes
diff --git a/packages/typescript/ai-vue/package.json b/packages/typescript/ai-vue/package.json
index 4f4615f8b..6f71c5e65 100644
--- a/packages/typescript/ai-vue/package.json
+++ b/packages/typescript/ai-vue/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-vue",
-  "version": "0.5.2",
+  "version": "0.5.3",
   "description": "Vue hooks for TanStack AI",
   "author": "",
   "license": "MIT",
diff --git a/packages/typescript/ai/CHANGELOG.md b/packages/typescript/ai/CHANGELOG.md
index dfc5e613e..4c15252c3 100644
--- a/packages/typescript/ai/CHANGELOG.md
+++ b/packages/typescript/ai/CHANGELOG.md
@@ -1,5 +1,53 @@
 # @tanstack/ai
 
+## 0.5.0
+
+### Minor Changes
+
+- Tighten the AG-UI adapter contract and simplify the core stream processor. ([#275](https://github.com/TanStack/ai/pull/275))
+
+  **Breaking type changes:**
+  - `TextMessageContentEvent.delta` is now required (was optional)
+  - `StepFinishedEvent.delta` is now required (was optional)
+
+  All first-party adapters already sent `delta` on every event, so this is a type-level enforcement of existing behavior. Community adapters that follow the reference implementations will not need code changes.
+
+  **Core processor simplifications:**
+  - `TEXT_MESSAGE_START` now resets text segment state, replacing heuristic overlap detection
+  - `TOOL_CALL_END` is now the authoritative signal for tool call input completion
+  - Removed delta/content fallback logic, whitespace-only message cleanup, and finish-reason conflict arbitration from the processor
+
+  **Adapter fixes:**
+  - Gemini: filter whitespace-only text parts, fix STEP_FINISHED content accumulation, emit fresh TEXT_MESSAGE_START after tool calls
+  - Anthropic: emit fresh TEXT_MESSAGE_START after tool_use blocks for proper text segmentation
+
+### Patch Changes
+
+- fix(ai, ai-client, ai-anthropic, ai-gemini): fix multi-turn conversations failing after tool calls ([#275](https://github.com/TanStack/ai/pull/275))
+
+  **Core (@tanstack/ai):**
+  - Lazy assistant message creation: `StreamProcessor` now defers creating the assistant message until the first content-bearing chunk arrives (text, tool call, thinking, or error), eliminating empty `parts: []` messages from appearing during auto-continuation when the model returns no content
+  - Add `prepareAssistantMessage()` (lazy) alongside deprecated `startAssistantMessage()` (eager, backwards-compatible)
+  - Add `getCurrentAssistantMessageId()` to check if a message was created
+  - **Rewrite `uiMessageToModelMessages()` to preserve part ordering**: the function now walks parts sequentially instead of separating by type, producing correctly interleaved assistant/tool messages (text1 + toolCall1 → toolResult1 → text2 + toolCall2 → toolResult2) instead of concatenating all text and batching all tool calls. This fixes multi-round tool flows where the model would see garbled conversation history and re-call tools unnecessarily.
+  - Deduplicate tool result messages: when a client tool has both a `tool-result` part and a `tool-call` part with `output`, only one `role: 'tool'` message is emitted per tool call ID
+
+  **Client (@tanstack/ai-client):**
+  - Update `ChatClient.processStream()` to use lazy assistant message creation, preventing UI flicker from empty messages being created then removed
+
+  **Anthropic:**
+  - Fix consecutive user-role messages violating Anthropic's alternating role requirement by merging them in `formatMessages`
+  - Deduplicate `tool_result` blocks with the same `tool_use_id`
+  - Filter out empty assistant messages from conversation history
+  - Suppress duplicate `RUN_FINISHED` event from `message_stop` when `message_delta` already emitted one
+  - Fix `TEXT_MESSAGE_END` incorrectly emitting for `tool_use` content blocks
+  - Add Claude Opus 4.6 model support with adaptive thinking and effort parameter
+
+  **Gemini:**
+  - Fix consecutive user-role messages violating Gemini's alternating role requirement by merging them in `formatMessages`
+  - Deduplicate `functionResponse` parts with the same name (tool call ID)
+  - Filter out empty model messages from conversation history
+
 ## 0.4.2
 
 ### Patch Changes
diff --git a/packages/typescript/ai/package.json b/packages/typescript/ai/package.json
index 4b76449d8..3fe3ccb31 100644
--- a/packages/typescript/ai/package.json
+++ b/packages/typescript/ai/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai",
-  "version": "0.4.2",
+  "version": "0.5.0",
   "description": "Core TanStack AI library - Open source AI SDK",
   "author": "Tanner Linsley",
   "license": "MIT",
diff --git a/packages/typescript/preact-ai-devtools/CHANGELOG.md b/packages/typescript/preact-ai-devtools/CHANGELOG.md
index 14f38624c..43785a94a 100644
--- a/packages/typescript/preact-ai-devtools/CHANGELOG.md
+++ b/packages/typescript/preact-ai-devtools/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @tanstack/preact-ai-devtools
 
+## 0.1.7
+
+### Patch Changes
+
+- Updated dependencies []:
+  - @tanstack/ai-devtools-core@0.3.3
+
 ## 0.1.6
 
 ### Patch Changes
diff --git a/packages/typescript/preact-ai-devtools/package.json b/packages/typescript/preact-ai-devtools/package.json
index e98092eb2..024a00ffa 100644
--- a/packages/typescript/preact-ai-devtools/package.json
+++ b/packages/typescript/preact-ai-devtools/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/preact-ai-devtools",
-  "version": "0.1.6",
+  "version": "0.1.7",
   "description": "Preact Devtools for TanStack AI.",
   "author": "tannerlinsley",
   "license": "MIT",
diff --git a/packages/typescript/react-ai-devtools/CHANGELOG.md b/packages/typescript/react-ai-devtools/CHANGELOG.md
index eb3ed9421..92f8c9403 100644
--- a/packages/typescript/react-ai-devtools/CHANGELOG.md
+++ b/packages/typescript/react-ai-devtools/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @tanstack/react-ai-devtools
 
+## 0.2.7
+
+### Patch Changes
+
+- Updated dependencies []:
+  - @tanstack/ai-devtools-core@0.3.3
+
 ## 0.2.6
 
 ### Patch Changes
diff --git a/packages/typescript/react-ai-devtools/package.json b/packages/typescript/react-ai-devtools/package.json
index 1e53098c8..87a731c45 100644
--- a/packages/typescript/react-ai-devtools/package.json
+++ b/packages/typescript/react-ai-devtools/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/react-ai-devtools",
-  "version": "0.2.6",
+  "version": "0.2.7",
   "description": "React Devtools for TanStack AI.",
   "author": "tannerlinsley",
   "license": "MIT",
diff --git a/packages/typescript/smoke-tests/adapters/CHANGELOG.md b/packages/typescript/smoke-tests/adapters/CHANGELOG.md
index 8b696792d..d5b385aef 100644
--- a/packages/typescript/smoke-tests/adapters/CHANGELOG.md
+++ b/packages/typescript/smoke-tests/adapters/CHANGELOG.md
@@ -1,5 +1,18 @@
 # @tanstack/tests-adapters
 
+## 0.1.12
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+  - @tanstack/ai-anthropic@0.5.0
+  - @tanstack/ai-gemini@0.5.0
+  - @tanstack/ai-grok@0.5.0
+  - @tanstack/ai-ollama@0.5.0
+  - @tanstack/ai-openai@0.5.0
+  - @tanstack/ai-openrouter@0.5.0
+
 ## 0.1.11
 
 ### Patch Changes
diff --git a/packages/typescript/smoke-tests/adapters/package.json b/packages/typescript/smoke-tests/adapters/package.json
index 6db3c6566..f51bd9d56 100644
--- a/packages/typescript/smoke-tests/adapters/package.json
+++ b/packages/typescript/smoke-tests/adapters/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/tests-adapters",
-  "version": "0.1.11",
+  "version": "0.1.12",
   "private": true,
   "description": "Tests for TanStack AI adapters",
   "author": "",
diff --git a/packages/typescript/smoke-tests/e2e/CHANGELOG.md b/packages/typescript/smoke-tests/e2e/CHANGELOG.md
index 839861b93..61eb19537 100644
--- a/packages/typescript/smoke-tests/e2e/CHANGELOG.md
+++ b/packages/typescript/smoke-tests/e2e/CHANGELOG.md
@@ -1,5 +1,16 @@
 # @tanstack/smoke-tests-e2e
 
+## 0.0.16
+
+### Patch Changes
+
+- Updated dependencies [[`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd), [`5d98472`](https://github.com/TanStack/ai/commit/5d984722e1f84725e3cfda834fbda3d0341ecedd)]:
+  - @tanstack/ai@0.5.0
+  - @tanstack/ai-client@0.4.4
+  - @tanstack/ai-openai@0.5.0
+  - @tanstack/ai-react@0.5.1
+  - @tanstack/tests-adapters@0.1.12
+
 ## 0.0.15
 
 ### Patch Changes
diff --git a/packages/typescript/smoke-tests/e2e/package.json b/packages/typescript/smoke-tests/e2e/package.json
index d39e49747..ef2602a35 100644
--- a/packages/typescript/smoke-tests/e2e/package.json
+++ b/packages/typescript/smoke-tests/e2e/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/smoke-tests-e2e",
-  "version": "0.0.15",
+  "version": "0.0.16",
   "description": "E2E tests for TanStack AI chat",
   "private": true,
   "type": "module",
diff --git a/packages/typescript/solid-ai-devtools/CHANGELOG.md b/packages/typescript/solid-ai-devtools/CHANGELOG.md
index fe7ec5e34..6b08906a8 100644
--- a/packages/typescript/solid-ai-devtools/CHANGELOG.md
+++ b/packages/typescript/solid-ai-devtools/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @tanstack/solid-ai-devtools
 
+## 0.2.7
+
+### Patch Changes
+
+- Updated dependencies []:
+  - @tanstack/ai-devtools-core@0.3.3
+
 ## 0.2.6
 
 ### Patch Changes
diff --git a/packages/typescript/solid-ai-devtools/package.json b/packages/typescript/solid-ai-devtools/package.json
index 25bdb41a6..3c1630d22 100644
--- a/packages/typescript/solid-ai-devtools/package.json
+++ b/packages/typescript/solid-ai-devtools/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/solid-ai-devtools",
-  "version": "0.2.6",
+  "version": "0.2.7",
   "description": "Solid TanStack AI Devtools",
   "author": "",
   "license": "MIT",