SEP-1686: Tasks #1041

LucaButBoring · 2025-10-23T23:02:12Z

This PR implements the required changes for modelcontextprotocol/modelcontextprotocol#1686, which adds task augmentation to requests.

Motivation and Context

The current MCP specification supports tool calls that execute a request and eventually receive a response, and tool calls can be passed a progress token to integrate with MCP’s progress-tracking functionality, enabling host applications to receive status updates for a tool call via notifications. However, there is no way for a client to explicitly request the status of a tool call, resulting in states where it is possible for a tool call to have been dropped on the server, and it is unknown if a response or a notification may ever arrive. Similarly, there is no way for a client to explicitly retrieve the result of a tool call after it has completed — if the result was dropped, clients must call the tool again, which is undesirable for tools expected to take minutes or more. This is particularly relevant for MCP servers abstracting existing workflow-based APIs, such as AWS Step Functions, Workflows for Google Cloud, or APIs representing CI/CD pipelines, among other applications.

This proposal (and implementation) solves this by introducing the concept of Tasks, which are pending work objects that can augment any other request. Clients generate a task ID and augment their request with it — that task ID is both a reference to the request and an idempotency token. If the server accepts the task augmentation request, clients can then poll for the status and eventual result of the task with the tasks/get and tasks/result operations.

How Has This Been Tested?

Unit tests and updated sHTTP example.

Breaking Changes

None.

Types of changes

Bug fix (non-breaking change which fixes an issue)
New feature (non-breaking change which adds functionality)
Breaking change (fix or feature that would cause existing functionality to change)
Documentation update

Checklist

I have read the MCP Documentation
My code follows the repository's style guidelines
New and existing tests pass locally
I have added appropriate error handling
I have added or updated documentation as needed

Additional context

…ript-sdk into feat/tasks

halter73

SEP-1686 currently states that it "introduces a mechanism for requestors (which can be either clients or servers, depending on the direction of communication) to augment their requests with tasks." Is this still the case?

I don't see any tests or examples demonstrating using a TaskStore with an McpClient (it's all McpServer or the Protocol base type), although I suppose it should work considering its shared code. It still might be nice to have an end-to-end test demonstrating that client-side support for stuff like elicitations works using the public APIs.

halter73 · 2025-10-31T00:05:05Z

src/experimental/tasks/stores/in-memory.ts

+ * Note: This is not suitable for production use as all data is lost on restart.
+ * For production, consider implementing TaskStore with a database or distributed cache.
+ */
+export class InMemoryTaskStore implements TaskStore {


Is there a reason we cannot create a default in-memory task store with settable max limits on the total number of tasks?

I like that this PR adds the TaskStore abstraction which opens the door for a distributed implementation and doesn't require the application developer to manually handle tasks/get, tasks/list, etc., but it feels weird to me to not have a production-ready in-memory solution provided by the SDK.

It should still be off by default to make sure people are explicit about any maxTrackedTask limits and the like, but it should be built in and not left to an example that is "not suitable for production." This will prove it's possible to implement a production-quality TaskStore in the easiest case where everything is tracked in-memory and lost on process restart.

Note: This is not suitable for production use as all data is lost on restart.

For production, consider implementing TaskStore with a database or distributed cache.

This is true, but I think the impact is overstated. The logic in protocol.ts that calls _taskStore.updateTaskStatus(taskMetadata.taskId, 'input_required'); and then sets the task back to 'working' when the a request completes also breaks if the server restarts. If the process exits before the client provides a response, the task will be permanently left in an 'input_required' state indefinitely without some manual intervention outside of the SDK.

In most cases supported by the SDK, when tasks cannot outlive the MCP server process, an in-memory TaskStore would be better than a distributed one because the client will be informed that the Task is no longer being tracked by the server after it restarts automatically.

I don't disagree, but precedence was the main reason for leaving this as an example and leaving out any limits, really - it's the same case with InMemoryEventStore and InMemoryOAuthClientProvider. @ihrpr @felixweinberger any input here?

If the SDK is going to provide a production-grade implementation, it needs to have limits and some form of logging extension points, but if it is not going to provide a production-grade implementation, I don't want to misrepresent this example as one.

It can never implement a production-ready service implementation, because that will always require some additional resources

Seems right to me to have this as an interface - it seems hard to provide a generic "production-ready" approach here; I guess we could use sqlite? But I think the argument witht he InMemoryEventStore and InMemoryOAuthClientProvider are convincing. If we wanted to create production ready examples, we can do that as follow-ups.

However, it's important this is documented clearly, which it is in the README.

src/shared/protocol.ts

src/shared/request.ts

src/shared/protocol.ts

src/types.ts

LucaButBoring · 2025-10-31T21:45:44Z

It still might be nice to have an end-to-end test demonstrating that client-side support for stuff like elicitations works using the public APIs.

Agreed, will add this.

edit: Done

src/types.ts

felixweinberger · 2025-11-25T18:37:49Z

@maxisbey @LucaButBoring I tested TS <> Py. The following worked:

TS Client -> TS Server
Py Client -> Py Server
TS Client -> Py Server

But this didn't work:

Py Server -> TS Client

To make this work cleanly I had to make 2 small changes:

Typescript SDK: fix the NotificationParamsSchema spec compliance (Python is correct) 44c751a
Python SDK: needed to handle empty ping events the TS client was sending modelcontextprotocol/python-sdk@da603f7

Then I get this:

LucaButBoring · 2025-11-25T18:38:50Z

TS SDK fix is in: 681cf0d

felixweinberger · 2025-11-25T19:00:59Z

TS SDK fix is in: 681cf0d

Gonna test elicitation examples as well, assuming that works fine I think we should get this landed.

src/server/mcp.ts

src/shared/protocol.ts

Responses and errors were incorrectly going through the original stream path instead of being queued. Also, extra.sendRequest was not setting the input_required status. These issues have been fixed and tests have been added/updated for them. Sequence diagram of the intended flow: ```mermaid sequenceDiagram participant C as Client Protocol participant CT as Client Transport participant ST as Server Transport participant S as Server Protocol participant TQ as TaskMessageQueue participant TS as TaskStore participant H as Async Handler Note over C,H: Phase 1: Task Creation activate C C->>CT: tools/call { task: { ttl: 60000 } } activate CT CT->>ST: HTTP POST activate ST ST->>S: _onrequest() activate S S->>TS: createTask() activate TS TS-->>S: Task { taskId, status: 'working' } deactivate TS S--)H: Start async handler (non-blocking) activate H S-->>ST: CreateTaskResult { task } deactivate S ST-->>CT: HTTP Response deactivate ST CT-->>C: CreateTaskResult deactivate CT deactivate C Note over C,H: Phase 2: Server Queues Elicitation Request H->>S: extra.sendRequest(elicitation, { relatedTask }) activate S S->>TQ: enqueue({ type: 'request', message: elicitation }) activate TQ TQ-->>S: OK deactivate TQ S->>S: Store resolver in _requestResolvers Note over S: Promise waiting... deactivate S H->>TS: updateTaskStatus('input_required') activate TS TS-->>H: OK deactivate TS Note over H: Blocked awaiting elicitation response Note over C,H: Phase 3: Client Polls Status activate C C->>CT: tasks/get { taskId } activate CT CT->>ST: HTTP POST activate ST ST->>S: _onrequest(GetTask) activate S S->>TS: getTask(taskId) activate TS TS-->>S: Task { status: 'input_required' } deactivate TS S-->>ST: Task deactivate S ST-->>CT: HTTP Response deactivate ST CT-->>C: Task { status: 'input_required' } deactivate CT deactivate C Note over C,H: Phase 4: Client Fetches Queued Messages activate C C->>CT: tasks/result { taskId } activate CT CT->>ST: HTTP POST activate ST ST->>S: _onrequest(GetTaskPayload) activate S S->>TQ: dequeue(taskId) activate TQ TQ-->>S: { type: 'request', message: elicitation } deactivate TQ S->>ST: send(elicitation, { relatedRequestId }) ST-->>CT: SSE Event: elicitation request Note over S: Handler blocks (task not terminal) Note over C,H: Phase 5: Client Handles & Responds CT->>C: _onrequest(elicitation) activate C Note over C: Extract relatedTaskId from _meta C->>C: Call ElicitRequestSchema handler C->>C: Check: relatedTaskId && _taskMessageQueue Note over C: _taskMessageQueue is undefined C->>CT: transport.send(response) CT->>ST: HTTP POST (elicitation response) deactivate C Note over C,H: Phase 6: Server Receives Response, Resolves Promise ST->>S: _onresponse(elicitation response) S->>S: Lookup resolver in _requestResolvers S->>S: resolver(response) Note over S: Promise resolves S-->>H: Elicitation result { action: 'accept', content } Note over H: Resumes execution Note over C,H: Phase 7: Task Completes H->>TS: storeTaskResult('completed', finalResult) activate TS TS-->>H: OK deactivate TS deactivate H Note over S: GetTaskPayload handler wakes up S->>TS: getTask(taskId) activate TS TS-->>S: Task { status: 'completed' } deactivate TS S->>TS: getTaskResult(taskId) activate TS TS-->>S: CallToolResult deactivate TS S-->>ST: Return final result deactivate S ST-->>CT: SSE Event: CallToolResult deactivate ST CT-->>C: CallToolResult { content: [...] } deactivate CT deactivate C ```

Phase 1-2 of tasks experimental isolation: - Create src/experimental/tasks/ directory structure - Move TaskStore, TaskMessageQueue, and related interfaces to experimental/tasks/interfaces.ts - Add experimental/tasks/types.ts for re-exporting spec types - Update shared/task.ts to re-export from experimental for backward compatibility - Add barrel exports for experimental module All tests pass (1399 tests).

Restore callTool() to its original implementation instead of delegating to experimental.tasks.callToolStream(). This aligns with Python SDK's approach where call_tool() is task-unaware and call_tool_as_task() is the explicit experimental method. Changes: - Add guard for taskSupport: 'required' tools with clear error message - Restore original output schema validation logic - Add _cachedRequiredTaskTools to track required-only task tools - Remove unused takeResult import Tools with taskSupport: 'optional' work normally with callTool() since the server returns CallToolResult. Only 'required' tools need the experimental API.

LucaButBoring · 2025-11-27T17:05:54Z

@felixweinberger Merged and synced with main

Dismissing for merge

He-Pin · 2025-11-27T20:17:28Z

nice to see this got merged

![snyk-top-banner](https://res.cloudinary.com/snyk/image/upload/r-d/scm-platform/snyk-pull-requests/pr-banner-default.svg) <h3>Snyk has created this PR to upgrade @modelcontextprotocol/sdk from 1.24.0 to 1.24.3.</h3> :information_source: Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project. <hr/> - The recommended version is **3 versions** ahead of your current version. - The recommended version was released **a month ago**. <details> <summary><b>Release notes</b></summary> <br/> <details> <summary>Package name: <b>@modelcontextprotocol/sdk</b></summary> <ul> <li> <b>1.24.3</b> - <a href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/releases/tag/1.24.3">2025-12-04</a></br><h2>What's Changed</h2> <ul> <li>chore: fix dev dependency security vulnerabilities by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/felixweinberger/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/felixweinberger">@ felixweinberger</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3691198208" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1227" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1227/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1227">#1227</a></li> <li>chore(deps): bump express from 5.0.1 to 5.2.1 in the npm_and_yarn group across 1 directory by <a class="user-mention notranslate" data-hovercard-type="organization" data-hovercard-url="/orgs/dependabot/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/dependabot">@ dependabot</a>[bot] in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3691221872" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1228" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1228/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1228">#1228</a></li> <li>fix: release HTTP connections after POST responses by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/mattzcarey/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/mattzcarey">@ mattzcarey</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3685626979" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1214" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1214/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1214">#1214</a></li> <li>fix: skip priming events and closeSSEStream for old protocol versions by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/felixweinberger/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/felixweinberger">@ felixweinberger</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3694335007" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1233" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1233/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1233">#1233</a></li> <li>chore: bump version for patch release by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/felixweinberger/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/felixweinberger">@ felixweinberger</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3694887719" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1235" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1235/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1235">#1235</a></li> </ul> <p><strong>Full Changelog</strong>: <a class="commit-link" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/compare/1.24.2...1.24.3"><tt>1.24.2...1.24.3</tt></a></p> </li> <li> <b>1.24.2</b> - <a href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/releases/tag/1.24.2">2025-12-03</a></br><h2>What's Changed</h2> <ul> <li>feat: add optional resource annotations by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/vhorvath2010/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/vhorvath2010">@ vhorvath2010</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3436712736" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#954" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/954/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/954">#954</a></li> <li>chore: refresh CLAUDE.md by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/LucaButBoring/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/LucaButBoring">@ LucaButBoring</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3686867636" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1217" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1217/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1217">#1217</a></li> <li>refactor: make Server class framework-agnostic by moving express to separate module by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/cytle/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/cytle">@ cytle</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3689485567" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1223" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1223/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1223">#1223</a></li> <li>chore: bump version to 1.24.2 by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/pcarleton/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/pcarleton">@ pcarleton</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3689937597" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1224" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1224/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1224">#1224</a></li> </ul> <h2>New Contributors</h2> <ul> <li><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/vhorvath2010/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/vhorvath2010">@ vhorvath2010</a> made their first contribution in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3436712736" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#954" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/954/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/954">#954</a></li> <li><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/cytle/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/cytle">@ cytle</a> made their first contribution in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3689485567" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1223" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1223/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1223">#1223</a></li> </ul> <p><strong>Full Changelog</strong>: <a class="commit-link" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/compare/1.24.1...1.24.2"><tt>1.24.1...1.24.2</tt></a></p> </li> <li> <b>1.24.1</b> - <a href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/releases/tag/1.24.1">2025-12-02</a></br><h2>What's Changed</h2> <ul> <li>fix(streamableHttp): fix infinite retries when maxRetries is set to 0 by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/mrorigo/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/mrorigo">@ mrorigo</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3686035318" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1216" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1216/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1216">#1216</a></li> <li>chore: update protocol version to 2025-11-25 by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/dsp-ant/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/dsp-ant">@ dsp-ant</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3687018759" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1218" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1218/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1218">#1218</a></li> <li>chore: bump version for release by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/felixweinberger/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/felixweinberger">@ felixweinberger</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3687067916" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1219" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1219/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1219">#1219</a></li> </ul> <h2>New Contributors</h2> <ul> <li><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/mrorigo/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/mrorigo">@ mrorigo</a> made their first contribution in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3686035318" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1216" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1216/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1216">#1216</a></li> </ul> <p><strong>Full Changelog</strong>: <a class="commit-link" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/compare/1.24.0...1.24.1"><tt>1.24.0...1.24.1</tt></a></p> </li> <li> <b>1.24.0</b> - <a href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/releases/tag/1.24.0">2025-12-02</a></br><h2>Summary</h2> <p>This release brings us up to speed with the latest MCP spec <code>2025-11-25</code>. Take a look at the <a href="https://modelcontextprotocol.io/specification/2025-11-25" rel="nofollow">latest spec</a> as well as the release <a href="https://blog.modelcontextprotocol.io/posts/2025-11-25-first-mcp-anniversary/" rel="nofollow">blog post.</a></p> <h2>What's Changed</h2> <ul> <li>fix: update spec links from latest to draft by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/domdomegg/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/domdomegg">@ domdomegg</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3664829218" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1171" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1171/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1171">#1171</a></li> <li>Make sure to consume HTTP error response bodies by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/GreenStage/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/GreenStage">@ GreenStage</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3666874622" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1173" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1173/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1173">#1173</a></li> <li>docs: add GET request handling for streamableHttp stateless mode by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/saharis9988/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/saharis9988">@ saharis9988</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3660259155" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1161" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1161/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1161">#1161</a></li> <li>SEP-1686: Tasks by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/LucaButBoring/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/LucaButBoring">@ LucaButBoring</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3546900542" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1041" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1041/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1041">#1041</a></li> <li>Fix JSON parse error on SSE events with empty data by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/felixweinberger/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/felixweinberger">@ felixweinberger</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3672860656" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1184" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1184/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1184">#1184</a></li> <li>Fix StreamableHTTPClientTransport instantiation by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/yuwzho/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/yuwzho">@ yuwzho</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3420595607" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#944" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/944/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/944">#944</a></li> <li>feat: eslint rule to prefer node protocols by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/mattzcarey/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/mattzcarey">@ mattzcarey</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3674518488" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1187" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1187/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1187">#1187</a></li> <li>fix: call tasks/result to deliver side-channel messages by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/felixweinberger/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/felixweinberger">@ felixweinberger</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3672896336" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1185" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1185/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1185">#1185</a></li> <li>Add invalid_target oauth error (rfc 8707) by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/GreenStage/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/GreenStage">@ GreenStage</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3672704149" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1183" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1183/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1183">#1183</a></li> <li>fix(client): use StreamableHTTPError instead of plain Error in send() by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/yamadashy/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/yamadashy">@ yamadashy</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3669612690" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1178" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1178/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1178">#1178</a></li> <li>coerce 'expires_in' to be a number by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/adam-kuhn/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/adam-kuhn">@ adam-kuhn</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3624481815" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1111" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1111/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1111">#1111</a></li> <li>Allow HTTP issuer URLs when MCP_DEV_MODE is enabled by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/jerome3o-anthropic/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/jerome3o-anthropic">@ jerome3o-anthropic</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3675262314" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1189" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1189/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1189">#1189</a></li> <li>fix: update registerTool signature for proper typed ToolCallback by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/mattzcarey/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/mattzcarey">@ mattzcarey</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3674832778" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1188" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1188/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1188">#1188</a></li> <li>SEP-1046: Client credentials flow for M2M without user interaction by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/KKonstantinov/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/KKonstantinov">@ KKonstantinov</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3655110317" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1157" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1157/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1157">#1157</a></li> <li>adds the transitive @ types/express-serve-static-core dependency as a direct devDependency by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/mgyarmathy/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/mgyarmathy">@ mgyarmathy</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3584050696" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1078" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1078/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1078">#1078</a></li> <li>Fix optional argument handling in prompts for Zod V4 by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/filip-bartuska-ipf/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/filip-bartuska-ipf">@ filip-bartuska-ipf</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3680574535" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1199" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1199/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1199">#1199</a></li> <li>fix hanging stdio servers by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/mattzcarey/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/mattzcarey">@ mattzcarey</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3680985762" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1200" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1200/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1200">#1200</a></li> <li>README refactor by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/KKonstantinov/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/KKonstantinov">@ KKonstantinov</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3679336733" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1197" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1197/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1197">#1197</a></li> <li>[Docs] Fix typo by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/koic/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/koic">@ koic</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3576912671" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1067" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1067/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1067">#1067</a></li> <li>feat: add closeSSEStream callback to RequestHandlerExtra by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/felixweinberger/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/felixweinberger">@ felixweinberger</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3663783141" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1166" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1166/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1166">#1166</a></li> <li>fix: improve SSE reconnection behavior by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/felixweinberger/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/felixweinberger">@ felixweinberger</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3675644114" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1191" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1191/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1191">#1191</a></li> <li>fix: normalize headers in sse transport by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/marcrasi/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/marcrasi">@ marcrasi</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3301818827" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#856" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/856/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/856">#856</a></li> <li>feat: add closeStandaloneSSEStream for GET stream polling by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/felixweinberger/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/felixweinberger">@ felixweinberger</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3681592788" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1203" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1203/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1203">#1203</a></li> <li>fix: normalize null to undefined in ElicitResultSchema content field by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/mattzcarey/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/mattzcarey">@ mattzcarey</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3681871133" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1204" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1204/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1204">#1204</a></li> <li>Modify Origin header validation in validateRequestHeaders (streamableHttp.ts and sse.ts) to allow requests without an Origin, as they are not relevant to server DNS rebinding protection. by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/jacopoc/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/jacopoc">@ jacopoc</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3682254908" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1205" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1205/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1205">#1205</a></li> <li>fix: allow zod 4 transformations by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/mattzcarey/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/mattzcarey">@ mattzcarey</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3685521543" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1213" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1213/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1213">#1213</a></li> <li>feat: backwards-compatible createMessage overloads for SEP-1577 by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/felixweinberger/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/felixweinberger">@ felixweinberger</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3685389937" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1212" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1212/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1212">#1212</a></li> <li>chore: bump version for release by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/felixweinberger/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/felixweinberger">@ felixweinberger</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3685838812" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1215" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1215/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1215">#1215</a></li> </ul> <h2>New Contributors</h2> <ul> <li><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/GreenStage/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/GreenStage">@ GreenStage</a> made their first contribution in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3666874622" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1173" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1173/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1173">#1173</a></li> <li><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/saharis9988/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/saharis9988">@ saharis9988</a> made their first contribution in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3660259155" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#1161" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/1161/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/1161">#1161</a></li> <li><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/yuwzho/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/yuwzho">@ yuwzho</a> made their first contribution in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3420595607" data-permission-text="Title is private" data-url="modelcontextprotocol/typescript-sdk#944" data-hovercard-type="pull_request" data-hovercard-url="/modelcontextprotocol/typescript-sdk/pull/944/hovercard" href="https://redirect.github.com/modelcontextprotocol/typescript-sdk/pull/944">#944</a></li> <li><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/yamadashy/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://redirect.github.com/yamadashy">@ yamadashy</a> made their first contribution in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="3669612690" data-permission-text="Title is 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LucaButBoring added 10 commits October 22, 2025 14:47

Add types for tasks

16ba027

Implement PendingRequest and basic task API

ecef231

Implement RelatedTask metadata sends

41f2124

Implement task state management

a8fabb6

Attach related task metadata to request handler

b3420b3

Create task before calling handler

8e17d04

Create task example

fcd2882

Implement input_required status for tasks

c73b105

Implement unit tests for task support

b028061

Add docs for task augmentation

d9b72f0

LucaButBoring mentioned this pull request Oct 23, 2025

SEP-1686: Tasks modelcontextprotocol/modelcontextprotocol#1686

Closed

LucaButBoring added 2 commits October 27, 2025 12:19

Implement tasks/list method

5dc999f

Merge branch 'main' of https://github.com/modelcontextprotocol/typesc…

a2d65df

…ript-sdk into feat/tasks

LucaButBoring mentioned this pull request Oct 28, 2025

[notes] Agents WG Meeting, October 28th, 2025 modelcontextprotocol/modelcontextprotocol#1726

Closed

Automatically execute tool calls as tasks

71a9568

LucaButBoring mentioned this pull request Oct 29, 2025

SEP-1686: Tasks modelcontextprotocol/modelcontextprotocol#1732

Merged

9 tasks

felixweinberger mentioned this pull request Oct 30, 2025

Implement SEP-1686: Tasks #1060

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LucaButBoring mentioned this pull request Oct 31, 2025

SEP-1686: Tasks modelcontextprotocol/python-sdk#1554

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9 tasks

halter73 reviewed Oct 31, 2025

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halter73 reviewed Oct 31, 2025

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Merge branch 'main' into feat/tasks

30043ed

LucaButBoring and others added 7 commits October 31, 2025 19:14

Implement task API tests on both the client and server

2167b43

Make default task polling interval configurable

12d0f66

Merge branch 'main' into feat/tasks

6a28003

Exclude relatedTask from RequestHandlerExtra

bb28ef7

Mark tasks as cancelled only after confirming abort

0bf2b42

Store task result before attempting to respond to client

486e8ed

Allow task polling before creation notification arrives

06db603

felixweinberger requested changes Nov 25, 2025

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Fix TaskStatusNotificationParamsSchema

681cf0d

connor4312 reviewed Nov 25, 2025

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src/server/mcp.ts Show resolved Hide resolved

LucaButBoring and others added 2 commits November 25, 2025 12:18

Add missing execution field to ListTools

6447edd

Merge branch 'main' into feat/tasks

191e749

felixweinberger reviewed Nov 26, 2025

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LucaButBoring and others added 5 commits November 26, 2025 10:18

Remove bit that deletes related-task metadata unnecessarily

333a257

Merge branch 'main' into feat/tasks

7836cff

Let taskStore.updateTaskStatus throw directly if task is cancelled

6bb2444

Return task data in cancellation result

3e9f737

felixweinberger force-pushed the feat/tasks branch 2 times, most recently from 1789d3c to 3e9f737 Compare November 26, 2025 22:18

felixweinberger mentioned this pull request Nov 26, 2025

feat(experimental): Isolate tasks into experimental module LucaButBoring/mcp-ts-sdk#3

Merged

6 tasks

felixweinberger and others added 4 commits November 27, 2025 09:04

test: add callToolStream tests for non-task tools

0e89248

Merge branch 'main' into feat/tasks

b72a169

felixweinberger approved these changes Nov 27, 2025

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felixweinberger merged commit b9538a2 into modelcontextprotocol:main Nov 27, 2025
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felixweinberger mentioned this pull request Nov 27, 2025

fix: call tasks/result to deliver side-channel messages #1185

Merged

9 tasks

LucaButBoring mentioned this pull request Dec 1, 2025

feat: add streaming methods for elicitation and sampling #1210

Open

9 tasks

SeasonPilot mentioned this pull request Jan 4, 2026

[Feature] Research on MCP Task support. alibaba/spring-ai-alibaba#3908

Open

SEP-1686: Tasks #1041

SEP-1686: Tasks #1041

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