docs(community): trim SDK WG work items to spec implementation and tiering

Author: felixweinberger

docs/community/sdk/charter.mdx

@@ -39,7 +39,7 @@ The SDK Working Group exists to keep the official MCP SDKs consistent, conforman
 
 | Role | Name             | Organization | GitHub                                                 | Term    |
 | ---- | ---------------- | ------------ | ------------------------------------------------------ | ------- |
-| Lead | Felix Weinberger | Anthropic    | [@felixweinberger](https://github.com/felixweinberger) | Initial |
+| Lead | Felix Weinberger | Anthropic    | [@felixweinberger](https://github.com/felixweinberger) | Ongoing |
 
 ## Authority & Decision Rights
 
@@ -71,13 +71,11 @@ Communication happens in the `#general-sdk-dev` Discord channel and the SDK Work
 
 ### Active Work Items
 
-| Item                                                   | Status      | Target Date | Champion            |
-| ------------------------------------------------------ | ----------- | ----------- | ------------------- |
-| TypeScript SDK v2                                      | In progress | 2026 Q2     | @felixweinberger    |
-| Python SDK v2                                          | In progress | 2026 Q2     | @felixweinberger    |
-| 2026-06-30 spec support across Tier-1 SDKs             | Planning    | 2026 Q3     | Per-SDK maintainers |
-| Conformance suite integrated in all official SDK repos | In progress | 2026 Q2     | Per-SDK maintainers |
-| Quarterly tier review                                  | Recurring   | Quarterly   | WG Leads            |
+| Item                                                | Status      | Target Date | Champion            |
+| --------------------------------------------------- | ----------- | ----------- | ------------------- |
+| 2026-06-30 spec support across Tier-1 SDKs          | Planning    | 2026 Q3     | Per-SDK maintainers |
+| Cross-SDK guidance for stateless transport adoption | In progress | 2026 Q2     | WG Leads            |
+| Quarterly tier review                               | Recurring   | Quarterly   | WG Leads            |
 
 ### Success Criteria