TanStack · github-actions · Jul 21, 2026
diff --git a/.changeset/resumable-streams.md b/.changeset/resumable-streams.md
diff --git a/examples/ag-ui/CHANGELOG.md b/examples/ag-ui/CHANGELOG.md
@@ -1,5 +1,14 @@
 # ag-ui
 
+## 0.0.3
+
+### Patch Changes
+
+- Updated dependencies [[`7c7aa09`](https://github.com/TanStack/ai/commit/7c7aa09a7402b45e6285ebc78a606131aec3e288)]:
+  - @tanstack/ai-client@0.23.0
+  - @tanstack/ai-react@0.18.2
+  - @tanstack/ai-react-ui@0.8.16
+
 ## 0.0.2
 
 ### Patch Changes

diff --git a/examples/ag-ui/package.json b/examples/ag-ui/package.json
@@ -2,7 +2,7 @@
   "name": "ag-ui",
   "private": true,
   "type": "module",
-  "version": "0.0.2",
+  "version": "0.0.3",
   "scripts": {
     "detect-servers": "node scripts/detect-servers.mjs",
     "predev": "node scripts/detect-servers.mjs",

diff --git a/packages/ai-acp/CHANGELOG.md b/packages/ai-acp/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @tanstack/ai-acp
 
+## 0.2.4
+
+### Patch Changes
+
+- Updated dependencies [[`7c7aa09`](https://github.com/TanStack/ai/commit/7c7aa09a7402b45e6285ebc78a606131aec3e288)]:
+  - @tanstack/ai@0.43.0
+  - @tanstack/ai-sandbox@0.2.5
+
 ## 0.2.3
 
 ### Patch Changes

diff --git a/packages/ai-acp/package.json b/packages/ai-acp/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-acp",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "description": "Shared Agent Client Protocol (ACP) transport, session, and AG-UI translation for TanStack AI harness adapters.",
   "author": "",
   "license": "MIT",

diff --git a/packages/ai-angular/CHANGELOG.md b/packages/ai-angular/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @tanstack/ai-angular
 
+## 0.3.2
+
+### Patch Changes
+
+- Updated dependencies [[`7c7aa09`](https://github.com/TanStack/ai/commit/7c7aa09a7402b45e6285ebc78a606131aec3e288)]:
+  - @tanstack/ai@0.43.0
+  - @tanstack/ai-client@0.23.0
+
 ## 0.3.1
 
 ### Patch Changes

diff --git a/packages/ai-angular/package.json b/packages/ai-angular/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-angular",
-  "version": "0.3.1",
+  "version": "0.3.2",
   "description": "Angular signals integration for TanStack AI streaming chat, structured outputs, and media generation.",
   "author": "",
   "license": "MIT",

diff --git a/packages/ai-anthropic/CHANGELOG.md b/packages/ai-anthropic/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @tanstack/ai-anthropic
 
+## 0.16.4
+
+### Patch Changes
+
+- Updated dependencies [[`7c7aa09`](https://github.com/TanStack/ai/commit/7c7aa09a7402b45e6285ebc78a606131aec3e288)]:
+  - @tanstack/ai@0.43.0
+
 ## 0.16.3
 
 ### Patch Changes

diff --git a/packages/ai-anthropic/package.json b/packages/ai-anthropic/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-anthropic",
-  "version": "0.16.3",
+  "version": "0.16.4",
   "description": "Anthropic Claude adapter for TanStack AI chat, tool calling, thinking, and structured outputs.",
   "author": "Tanner Linsley",
   "license": "MIT",

diff --git a/packages/ai-bedrock/CHANGELOG.md b/packages/ai-bedrock/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @tanstack/ai-bedrock
 
+## 0.1.5
+
+### Patch Changes
+
+- Updated dependencies [[`7c7aa09`](https://github.com/TanStack/ai/commit/7c7aa09a7402b45e6285ebc78a606131aec3e288)]:
+  - @tanstack/ai@0.43.0
+  - @tanstack/openai-base@0.9.10
+
 ## 0.1.4
 
 ### Patch Changes

diff --git a/packages/ai-bedrock/package.json b/packages/ai-bedrock/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-bedrock",
-  "version": "0.1.4",
+  "version": "0.1.5",
   "type": "module",
   "description": "Amazon Bedrock adapter for TanStack AI — OpenAI-compatible chat, responses, tools, and reasoning.",
   "author": "",

diff --git a/packages/ai-claude-code/CHANGELOG.md b/packages/ai-claude-code/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @tanstack/ai-claude-code
 
+## 0.2.4
+
+### Patch Changes
+
+- Updated dependencies [[`7c7aa09`](https://github.com/TanStack/ai/commit/7c7aa09a7402b45e6285ebc78a606131aec3e288)]:
+  - @tanstack/ai@0.43.0
+  - @tanstack/ai-sandbox@0.2.5
+
 ## 0.2.3
 
 ### Patch Changes

diff --git a/packages/ai-claude-code/package.json b/packages/ai-claude-code/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-claude-code",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "description": "Claude Code harness adapter for TanStack AI — run Claude Code as a chat backend with local tool execution and stateful sessions.",
   "author": "",
   "license": "MIT",

diff --git a/packages/ai-client/CHANGELOG.md b/packages/ai-client/CHANGELOG.md
@@ -1,5 +1,60 @@
 # @tanstack/ai-client
 
+## 0.23.0
+
+### Minor Changes
+
+- [#955](https://github.com/TanStack/ai/pull/955) [`7c7aa09`](https://github.com/TanStack/ai/commit/7c7aa09a7402b45e6285ebc78a606131aec3e288) - Resumable streams: reconnect to an in-flight SSE **or NDJSON** response without
+  re-running the provider.
+
+  `toServerSentEventsResponse` and `toHttpResponse` both accept a
+  `durability: { adapter, batch }` option. The adapter (`StreamDurability`)
+  records every chunk to an ordered log before delivery and tags each event with
+  an opaque, adapter-owned offset — an SSE `id:` line, or the `id` of an NDJSON
+  `{ id, chunk }` envelope (NDJSON has no native event-id). A reconnect
+  (`Last-Event-ID`) or an explicit `?offset` read replays strictly after that
+  offset from the log — the lazy provider stream is never iterated on resume.
+  Producers terminalize the log on cancellation and failure (`RUN_ERROR` append
+  - `close()`) and on completion when the source stream emits its own terminal
+    event (`chat()` always does), so readers are never parked on a dead run.
+
+  Two adapters ship: `memoryStream(request)` in `@tanstack/ai` (process-local,
+  for development and tests) and the new `@tanstack/ai-durable-stream` package,
+  a Durable Streams protocol adapter for production backends.
+
+  For the `GET` handler that a reload or a second tab reconnects to,
+  `resumeServerSentEventsResponse({ adapter })` and `resumeHttpResponse({ adapter })`
+  replay a run straight from the durability log. They need no producer stream and
+  return a 400 when the request carries no resume offset.
+
+  On the client, all four HTTP adapters are now resumable — `fetchServerSentEvents`,
+  `fetchHttpStream`, `xhrServerSentEvents`, and `xhrHttpStream`. Each tracks the
+  per-event offset, auto-reconnects with `Last-Event-ID`, de-duplicates the
+  replayed prefix, and exposes `joinRun(runId)` to attach to an in-flight or
+  finished run from the start (read-only GET with `offset=-1`). Untagged streams
+  behave exactly as before. A durable run that ends with no terminal event and no
+  forward progress now throws `DurableStreamIncompleteError` instead of hanging.
+
+  Reconnection and durability are bounded so failures surface rather than hang or
+  loop:
+  - `memoryStream` evicts completed logs after a grace window (unbounded growth
+    is gone); resuming an expired/unknown run throws, and a from-start join to a
+    run that never produces fails after `MemoryStreamOptions.firstChunkDeadlineMs`.
+  - all four HTTP adapters accept `reconnect: { maxAttempts, delayMs }` — a
+    throttle plus a ceiling on CONSECUTIVE no-progress reconnects (default 5;
+    forward progress resets it) that fails with the new `StreamReconnectLimitError`
+    instead of reconnecting endlessly, without penalizing a healthy long-lived run.
+  - `durableStream` accepts `reconnect: { maxReadFailures, delayMs }` to bound its
+    read-retry loop, and `server` is now optional when `fetch` is provided (e.g. a
+    Cloudflare service binding).
+  - `toServerSentEventsResponse` accepts `debug` to record durability terminal /
+    close failures server-side, where a replaying joiner cannot observe them.
+
+### Patch Changes
+
+- Updated dependencies [[`7c7aa09`](https://github.com/TanStack/ai/commit/7c7aa09a7402b45e6285ebc78a606131aec3e288)]:
+  - @tanstack/ai@0.43.0
+
 ## 0.22.1
 
 ### Patch Changes

diff --git a/packages/ai-client/package.json b/packages/ai-client/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-client",
-  "version": "0.22.1",
+  "version": "0.23.0",
   "description": "Framework-agnostic headless client for TanStack AI chat, realtime sessions, streaming transports, and media generations.",
   "author": "Tanner Linsley",
   "license": "MIT",

diff --git a/packages/ai-code-mode-skills/CHANGELOG.md b/packages/ai-code-mode-skills/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @tanstack/ai-code-mode-skills
 
+## 0.3.12
+
+### Patch Changes
+
+- Updated dependencies [[`7c7aa09`](https://github.com/TanStack/ai/commit/7c7aa09a7402b45e6285ebc78a606131aec3e288)]:
+  - @tanstack/ai@0.43.0
+  - @tanstack/ai-code-mode@0.3.9
+
 ## 0.3.11
 
 ### Patch Changes

diff --git a/packages/ai-code-mode-skills/package.json b/packages/ai-code-mode-skills/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-code-mode-skills",
-  "version": "0.3.11",
+  "version": "0.3.12",
   "description": "Persistent runtime skill library for TanStack AI Code Mode agents and sandboxed tool orchestration.",
   "author": "Tanner Linsley",
   "license": "MIT",

diff --git a/packages/ai-code-mode/CHANGELOG.md b/packages/ai-code-mode/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @tanstack/ai-code-mode
 
+## 0.3.9
+
+### Patch Changes
+
+- Updated dependencies [[`7c7aa09`](https://github.com/TanStack/ai/commit/7c7aa09a7402b45e6285ebc78a606131aec3e288)]:
+  - @tanstack/ai@0.43.0
+
 ## 0.3.8
 
 ### Patch Changes

diff --git a/packages/ai-code-mode/package.json b/packages/ai-code-mode/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-code-mode",
-  "version": "0.3.8",
+  "version": "0.3.9",
   "description": "Secure TypeScript Code Mode for TanStack AI agents to execute sandboxed tool orchestration programs.",
   "author": "Tanner Linsley",
   "license": "MIT",

diff --git a/packages/ai-codex/CHANGELOG.md b/packages/ai-codex/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @tanstack/ai-codex
 
+## 0.2.4
+
+### Patch Changes
+
+- Updated dependencies [[`7c7aa09`](https://github.com/TanStack/ai/commit/7c7aa09a7402b45e6285ebc78a606131aec3e288)]:
+  - @tanstack/ai@0.43.0
+  - @tanstack/ai-sandbox@0.2.5
+
 ## 0.2.3
 
 ### Patch Changes

diff --git a/packages/ai-codex/package.json b/packages/ai-codex/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-codex",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "description": "Codex harness adapter for TanStack AI — run OpenAI Codex as a chat backend with local tool execution and stateful sessions.",
   "author": "",
   "license": "MIT",

diff --git a/packages/ai-devtools/CHANGELOG.md b/packages/ai-devtools/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @tanstack/ai-devtools-core
 
+## 0.4.25
+
+### Patch Changes
+
+- Updated dependencies [[`7c7aa09`](https://github.com/TanStack/ai/commit/7c7aa09a7402b45e6285ebc78a606131aec3e288)]:
+  - @tanstack/ai@0.43.0
+
 ## 0.4.24
 
 ### Patch Changes

diff --git a/packages/ai-devtools/package.json b/packages/ai-devtools/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tanstack/ai-devtools-core",
-  "version": "0.4.24",
+  "version": "0.4.25",
   "description": "Core TanStack AI Devtools plugin for inspecting chat messages, tool calls, streams, and errors.",
   "author": "Tanner Linsley",
   "license": "MIT",

diff --git a/packages/ai-durable-stream/CHANGELOG.md b/packages/ai-durable-stream/CHANGELOG.md
@@ -0,0 +1,56 @@
+# @tanstack/ai-durable-stream
+
+## 0.1.0
+
+### Minor Changes
+
+- [#955](https://github.com/TanStack/ai/pull/955) [`7c7aa09`](https://github.com/TanStack/ai/commit/7c7aa09a7402b45e6285ebc78a606131aec3e288) - Resumable streams: reconnect to an in-flight SSE **or NDJSON** response without
+  re-running the provider.
+
+  `toServerSentEventsResponse` and `toHttpResponse` both accept a
+  `durability: { adapter, batch }` option. The adapter (`StreamDurability`)
+  records every chunk to an ordered log before delivery and tags each event with
+  an opaque, adapter-owned offset — an SSE `id:` line, or the `id` of an NDJSON
+  `{ id, chunk }` envelope (NDJSON has no native event-id). A reconnect
+  (`Last-Event-ID`) or an explicit `?offset` read replays strictly after that
+  offset from the log — the lazy provider stream is never iterated on resume.
+  Producers terminalize the log on cancellation and failure (`RUN_ERROR` append
+  - `close()`) and on completion when the source stream emits its own terminal
+    event (`chat()` always does), so readers are never parked on a dead run.
+
+  Two adapters ship: `memoryStream(request)` in `@tanstack/ai` (process-local,
+  for development and tests) and the new `@tanstack/ai-durable-stream` package,
+  a Durable Streams protocol adapter for production backends.
+
+  For the `GET` handler that a reload or a second tab reconnects to,
+  `resumeServerSentEventsResponse({ adapter })` and `resumeHttpResponse({ adapter })`
+  replay a run straight from the durability log. They need no producer stream and
+  return a 400 when the request carries no resume offset.
+
+  On the client, all four HTTP adapters are now resumable — `fetchServerSentEvents`,
+  `fetchHttpStream`, `xhrServerSentEvents`, and `xhrHttpStream`. Each tracks the
+  per-event offset, auto-reconnects with `Last-Event-ID`, de-duplicates the
+  replayed prefix, and exposes `joinRun(runId)` to attach to an in-flight or
+  finished run from the start (read-only GET with `offset=-1`). Untagged streams
+  behave exactly as before. A durable run that ends with no terminal event and no
+  forward progress now throws `DurableStreamIncompleteError` instead of hanging.
+
+  Reconnection and durability are bounded so failures surface rather than hang or
+  loop:
+  - `memoryStream` evicts completed logs after a grace window (unbounded growth
+    is gone); resuming an expired/unknown run throws, and a from-start join to a
+    run that never produces fails after `MemoryStreamOptions.firstChunkDeadlineMs`.
+  - all four HTTP adapters accept `reconnect: { maxAttempts, delayMs }` — a
+    throttle plus a ceiling on CONSECUTIVE no-progress reconnects (default 5;
+    forward progress resets it) that fails with the new `StreamReconnectLimitError`
+    instead of reconnecting endlessly, without penalizing a healthy long-lived run.
+  - `durableStream` accepts `reconnect: { maxReadFailures, delayMs }` to bound its
+    read-retry loop, and `server` is now optional when `fetch` is provided (e.g. a
+    Cloudflare service binding).
+  - `toServerSentEventsResponse` accepts `debug` to record durability terminal /
+    close failures server-side, where a replaying joiner cannot observe them.
+
+### Patch Changes
+
+- Updated dependencies [[`7c7aa09`](https://github.com/TanStack/ai/commit/7c7aa09a7402b45e6285ebc78a606131aec3e288)]:
+  - @tanstack/ai@0.43.0