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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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17
packages/client/test/client/mcpParamMirroring.test.ts
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@ -477,6 +477,23 @@ describe('SEP-2243 Streamable HTTP transport seams', () => {
expect(sent().get('mcp-name')).toBe('route');
});
it('Mcp-Name mirrors params.taskId on tasks/get, tasks/update, and tasks/cancel (SEP-2663)', async () => {
const { tx, sent } = transportWithCapture();
await tx.start();
for (const method of ['tasks/get', 'tasks/update', 'tasks/cancel']) {
await tx.send(modernRequest(method, { taskId: 'task-123' }));
expect(sent().get('mcp-method')).toBe(method);
expect(sent().get('mcp-name')).toBe('task-123');
}
// tasks/list carries no routing name — off the source table, no header.
await tx.send(modernRequest('tasks/list', {}));
expect(sent().get('mcp-name')).toBeNull();
// A non-string params.taskId has nothing to mirror — no header, so the
// server's later rungs (not -32020) answer the malformed body.
await tx.send(modernRequest('tasks/get', { taskId: 42 }));
expect(sent().get('mcp-name')).toBeNull();
});
it('per-request TransportSendOptions.headers cannot override reserved standard/auth headers', async () => {
const { tx, sent } = transportWithCapture();
await tx.start();