Normalize MCP Accept handling, add canonical root discovery, bump server version, and expand tests

app/mcp/route.ts

@@ -99,20 +99,29 @@ function acceptedMcpRequestNeedsNormalization(request: Request) {
   return null
 }
 
-function normalizedMcpRequest(request: Request) {
+async function normalizedMcpRequest(request: Request) {
   const needsNormalization = acceptedMcpRequestNeedsNormalization(request)
 
   if (needsNormalization === null) {
     return null
   }
 
-  if (!needsNormalization) {
-    return request
+  const body = await request.text()
+  const headers: Record<string, string> = {}
+
+  request.headers.forEach((value, key) => {
+    headers[key] = value
+  })
+
+  if (needsNormalization) {
+    headers.accept = NORMALIZED_ACCEPT
   }
 
-  const headers = new Headers(request.headers)
-  headers.set('accept', NORMALIZED_ACCEPT)
-  return new Request(request, { headers })
+  return new Request(request.url, {
+    method: request.method,
+    headers,
+    body,
+  })
 }
 
 function isCanonicalMcpRootRequest(request: Request) {
@@ -188,7 +197,7 @@ export async function POST(request: Request) {
     return jsonRpcError(request, 415, -32600, 'Content-Type must be application/json')
   }
 
-  const mcpRequest = normalizedMcpRequest(request)
+  const mcpRequest = await normalizedMcpRequest(request)
 
   if (!mcpRequest) {
     return jsonRpcError(request, 406, -32600, 'Accept must include application/json or */*; text/event-stream alone is not supported for JSON responses')

lib/ella-registry.ts

@@ -9,7 +9,7 @@ import {
 } from './entity-data'
 
 export const ELLA_CANONICAL_ENTITY_ID = 'https://ellaentity.ai/#ella' as const
-export const ELLA_MCP_SERVER_INFO = { name: 'ellaentity-mcp', version: '1.1.3' } as const
+export const ELLA_MCP_SERVER_INFO = { name: 'ellaentity-mcp', version: '1.1.4' } as const
 export const ELLA_MCP_PROTOCOL_VERSIONS = ['2025-11-25', '2025-06-18'] as const
 export const ELLA_MCP_DEFAULT_PROTOCOL_VERSION = ELLA_MCP_PROTOCOL_VERSIONS[0]
 export const ELLA_REGISTRY_DATA_VERSION = '2026-07-13.mcp-v1-1' as const

tests/mcp.test.ts

@@ -82,14 +82,21 @@ async function pingWithHeaders(headers: HeadersInit, includeDefaultAccept = true
 }
 
 test('POST validates content negotiation and origins', async () => {
+  const jsonOnly = await pingWithHeaders({ accept: 'Application/Json; charset=utf-8' })
   const accepted = [
     await pingWithHeaders({}, false),
     await pingWithHeaders({ accept: '' }),
     await pingWithHeaders({ accept: '*/*' }),
-    await pingWithHeaders({ accept: 'Application/Json; charset=utf-8' }),
+    jsonOnly,
     await pingWithHeaders({ accept }),
   ]
 
+  assert.deepEqual(jsonOnly.body, {
+    jsonrpc: '2.0',
+    id: 'ping-accept',
+    result: {},
+  })
+
   for (const result of accepted) {
     assert.equal(result.response.status, 200)
     assert.deepEqual(result.body.result, {})