[Schema][Server][SEP-1686] Tasks #139

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1. chr-hertel

   added

   ServerIssues & PRs related to the Server componentIssues & PRs related to the Server component

   SchemaIssues & PRs related to the Schema componentIssues & PRs related to the Schema component

   on Nov 7, 2025
2. chr-hertel

   added this to 2025-11-25 Implementationon Nov 7, 2025
3. chr-hertel

   moved this to Backlog in 2025-11-25 Implementationon Nov 7, 2025
4. chr-hertel

   moved this from Backlog to No status in 2025-11-25 Implementationon Nov 7, 2025
5. LucaButBoring commented on Nov 21, 2025

   

   LucaButBoring

   on Nov 21, 2025

   Last edited by LucaButBoring

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   Relaying here from #general-sdk-dev:

   There doesn't seem to be a central ticket for all SDK implementations of a particular change, so sharing this here for SEP-1686 -- the following revisions have been merged on top of the base specification PR for tasks:

   • Clarify request lifetimes in task diagrams: PR
   • Fix capability phrasing in spec: PR
   • Remove an incorrectly-added field from notifications/cancelled: PR
   • Adjust schema to better-communicate where tasks are valid: PR
   • Rename/move annotations.taskHint to execution.taskSupport, tweak its enum values, and change a SHOULD to a MUST for the behavior when this is declared:
     • PR 1
     • PR 2
   • GetTask polling clarification: PR
   • SSE stream management clarification: PR

   The actual functional changes should be limited to taskHint, but the rest should help clarify some details around polling.

   To save the trouble of going through each of the above PRs one by one, you can also go to the file on the "Files changed" tab here, searching for docs/specification/draft/basic/utilities/tasks.mdx, and then using the "Display the rich diff" button, as shown:
   

   👍React with 👍1Reacted by Christopher Hertel
6. LucaButBoring commented on Nov 24, 2025

   

   LucaButBoring

   on Nov 24, 2025

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   One very last change (we're doing a hard cutoff on additional changes here): adding a lastUpdatedAt to the Task object: modelcontextprotocol/modelcontextprotocol#1875
7. chr-hertel

   added this to the 1.0 milestone on Dec 28, 2025
8. chr-hertel

   added

   help wantedContributions especially welcome if you have a good knowledge of the codebase and languageContributions especially welcome if you have a good knowledge of the codebase and language

   improves spec complianceImproves consistency with other SDKs such as TyepScriptImproves consistency with other SDKs such as TyepScript

   on Jan 23, 2026
9. chr-hertel commented on May 26, 2026

   

   chr-hertel

   on May 26, 2026

   MemberAuthor

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   Closing in favor of the new SEP-2663 Tasks Extension work, which supersedes SEP-1686.

   SEP-2663 (spec PR #2663) reframes Tasks as a stateless extension under the new SEP-2133 extensions framework. The SEP-1686 design from the 2025-11-25 spec is removed entirely. Since the PHP SDK never shipped the SEP-1686 design, there is nothing to deprecate.

   The replacement work is tracked under umbrella #335 (with this milestone's sub-issues). See:

   • [Schema] SEP-2663 Tasks: Task shape, resultType discriminator, tasks/* request/result types #345 — Tasks schema (Task shape, resultType, tasks/* request/result types)
   • [Server] SEP-2663 Tasks: TasksExtension, capability gate, tasks/* handlers #346 — tasks/get, tasks/update, tasks/cancel handlers
   • [Server] SEP-2663 Tasks: TaskStoreInterface with InMemory and PSR-16 stores #347 — TaskStoreInterface with InMemory default and DoS limits
   • [Server] SEP-2663 Tasks: Handlers return task handles; the application advances the task #348 — Long-running execution model
   • and the server→client routing sub-issue under [2026-07-28] Extensions framework + Tasks + MCP Apps #335
10. chr-hertel

    closed this as not plannedon May 26, 2026