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fix: mirror params.taskId into Mcp-Name for tasks requests (SEP-2663) (#2613)

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Co-authored-by: Felix Weinberger <fweinberger@anthropic.com>
Co-authored-by: Konstantin Konstantinov <KKonstantinov@users.noreply.github.com>
This commit is contained in:
James Carman 2026-08-28 12:23:49 -04:00 • committed by GitHub
commit 70de0c8b56
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1 changed files with 184 additions and 45 deletions
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test/e2e/helpers/index.ts
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@ -367,7 +367,7 @@ export function modernEnvelopeMeta(clientInfo?: Implementation): Record<string,
* HTTP requests on the wire. `MCP-Protocol-Version` and `Mcp-Method` are
* required on every modern *request* POST (notification POSTs are exempt);
* `Mcp-Name` is additionally required for the methods that mirror
* `params.name` / `params.uri`, and carries the `=?base64?…?=` sentinel
* `params.name` / `params.uri` / `params.taskId`, and carries the `=?base64?…?=` sentinel
* encoding the shipped client applies to it, so a name that is not a safe
* plain-ASCII field value reaches the server exactly as that client would
* send it rather than throwing in `Headers` construction.