diff --git a/.changeset/kind-ghosts-win.md b/.changeset/kind-ghosts-win.md
new file mode 100644
index 0000000000..7c71ff82a1
--- /dev/null
+++ b/.changeset/kind-ghosts-win.md
@@ -0,0 +1,5 @@
+---
+'@tanstack/start-client-core': patch
+---
+
+compact private frame decoder result keys
diff --git a/packages/start-client-core/src/client-rpc/frame-decoder.ts b/packages/start-client-core/src/client-rpc/frame-decoder.ts
index 9834b10a1b..6820afcf81 100644
--- a/packages/start-client-core/src/client-rpc/frame-decoder.ts
+++ b/packages/start-client-core/src/client-rpc/frame-decoder.ts
@@ -25,9 +25,9 @@ const MAX_FRAMES = 100_000 // Limit total frames to prevent CPU DoS
  */
 export interface FrameDecoderResult {
   /** Gets or creates a raw stream by ID (for use by deserialize plugin) */
-  getOrCreateStream: (id: number) => ReadableStream<Uint8Array>
+  getStream: (id: number) => ReadableStream<Uint8Array>
   /** Stream of JSON strings (NDJSON lines) */
-  jsonChunks: ReadableStream<string>
+  chunks: ReadableStream<string>
 }
 
 /**
@@ -404,5 +404,5 @@ export function createFrameDecoder(
     }
   })()
 
-  return { getOrCreateStream, jsonChunks }
+  return { getStream: getOrCreateStream, chunks: jsonChunks }
 }
diff --git a/packages/start-client-core/src/client-rpc/serverFnFetcher.ts b/packages/start-client-core/src/client-rpc/serverFnFetcher.ts
index 5c467bcdf0..2534b6bb93 100644
--- a/packages/start-client-core/src/client-rpc/serverFnFetcher.ts
+++ b/packages/start-client-core/src/client-rpc/serverFnFetcher.ts
@@ -273,18 +273,15 @@ async function getResponse(fn: () => Promise<Response>) {
         throw new Error('No response body for framed response')
       }
 
-      const { getOrCreateStream, jsonChunks } = createFrameDecoder(
-        response.body,
-      )
+      const { getStream, chunks } = createFrameDecoder(response.body)
 
       // Create deserialize plugin that wires up the raw streams
-      const rawStreamPlugin =
-        createRawStreamDeserializePlugin(getOrCreateStream)
+      const rawStreamPlugin = createRawStreamDeserializePlugin(getStream)
       const plugins = [rawStreamPlugin, ...(serovalPlugins || [])]
 
       const refs = new Map()
       result = await processFramedResponse({
-        jsonStream: jsonChunks,
+        jsonStream: chunks,
         onMessage: (msg: any) => fromCrossJSON(msg, { refs, plugins }),
         onError(msg, error) {
           console.error(msg, error)
diff --git a/packages/start-client-core/tests/frame-decoder.test.ts b/packages/start-client-core/tests/frame-decoder.test.ts
index 3a05611392..375024bff7 100644
--- a/packages/start-client-core/tests/frame-decoder.test.ts
+++ b/packages/start-client-core/tests/frame-decoder.test.ts
@@ -50,7 +50,7 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { jsonChunks } = createFrameDecoder(input)
+      const { chunks: jsonChunks } = createFrameDecoder(input)
       const reader = jsonChunks.getReader()
 
       await expect(reader.read()).rejects.toThrow('Unknown frame type')
@@ -65,7 +65,7 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { jsonChunks } = createFrameDecoder(input)
+      const { chunks: jsonChunks } = createFrameDecoder(input)
       const reader = jsonChunks.getReader()
 
       await expect(reader.read()).rejects.toThrow('Invalid raw frame streamId')
@@ -84,7 +84,7 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { jsonChunks } = createFrameDecoder(input)
+      const { chunks: jsonChunks } = createFrameDecoder(input)
       const reader = jsonChunks.getReader()
 
       await expect(reader.read()).rejects.toThrow('Invalid JSON frame streamId')
@@ -105,7 +105,7 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { jsonChunks } = createFrameDecoder(input)
+      const { chunks: jsonChunks } = createFrameDecoder(input)
       const reader = jsonChunks.getReader()
 
       await expect(reader.read()).rejects.toThrow('Frame payload too large')
@@ -125,7 +125,7 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { jsonChunks } = createFrameDecoder(input)
+      const { chunks: jsonChunks } = createFrameDecoder(input)
       const reader = jsonChunks.getReader()
 
       await expect(reader.read()).rejects.toThrow('Incomplete frame')
@@ -140,7 +140,7 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { jsonChunks } = createFrameDecoder(input)
+      const { chunks: jsonChunks } = createFrameDecoder(input)
       const reader = jsonChunks.getReader()
 
       await reader.cancel()
@@ -169,7 +169,7 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { jsonChunks } = createFrameDecoder(input)
+      const { chunks: jsonChunks } = createFrameDecoder(input)
       const reader = jsonChunks.getReader()
 
       await expect(reader.read()).rejects.toThrow('Too many raw streams')
@@ -186,7 +186,7 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { jsonChunks } = createFrameDecoder(input)
+      const { chunks: jsonChunks } = createFrameDecoder(input)
       const reader = jsonChunks.getReader()
 
       await expect(reader.read()).rejects.toThrow('buffer exceeded')
@@ -207,7 +207,7 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { jsonChunks } = createFrameDecoder(input)
+      const { chunks: jsonChunks } = createFrameDecoder(input)
 
       const reader = jsonChunks.getReader()
       const chunks: Array<string> = []
@@ -240,7 +240,8 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { jsonChunks, getOrCreateStream } = createFrameDecoder(input)
+      const { chunks: jsonChunks, getStream: getOrCreateStream } =
+        createFrameDecoder(input)
 
       // Pre-create the stream before consuming
       const stream5 = getOrCreateStream(5)
@@ -276,7 +277,7 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { jsonChunks } = createFrameDecoder(input)
+      const { chunks: jsonChunks } = createFrameDecoder(input)
 
       const reader = jsonChunks.getReader()
       const chunks: Array<string> = []
@@ -301,7 +302,7 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { jsonChunks } = createFrameDecoder(input)
+      const { chunks: jsonChunks } = createFrameDecoder(input)
       const reader = jsonChunks.getReader()
       const { value } = await reader.read()
 
@@ -326,7 +327,7 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { jsonChunks } = createFrameDecoder(input)
+      const { chunks: jsonChunks } = createFrameDecoder(input)
       const reader = jsonChunks.getReader()
       const { value } = await reader.read()
 
@@ -353,7 +354,7 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { jsonChunks } = createFrameDecoder(input)
+      const { chunks: jsonChunks } = createFrameDecoder(input)
       const reader = jsonChunks.getReader()
       const { value } = await reader.read()
 
@@ -387,7 +388,8 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { getOrCreateStream, jsonChunks } = createFrameDecoder(input)
+      const { getStream: getOrCreateStream, chunks: jsonChunks } =
+        createFrameDecoder(input)
 
       // Pre-create streams before consuming
       const stream1 = getOrCreateStream(1)
@@ -428,7 +430,8 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { getOrCreateStream, jsonChunks } = createFrameDecoder(input)
+      const { getStream: getOrCreateStream, chunks: jsonChunks } =
+        createFrameDecoder(input)
 
       // Pre-create stream 3
       const stream3 = getOrCreateStream(3)
@@ -480,7 +483,8 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { getOrCreateStream, jsonChunks } = createFrameDecoder(input)
+      const { getStream: getOrCreateStream, chunks: jsonChunks } =
+        createFrameDecoder(input)
 
       // First, fully consume JSON stream (this processes all frames)
       const jsonReader = jsonChunks.getReader()
@@ -536,7 +540,8 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { getOrCreateStream, jsonChunks } = createFrameDecoder(input)
+      const { getStream: getOrCreateStream, chunks: jsonChunks } =
+        createFrameDecoder(input)
 
       // Drain JSON (processes all frames)
       const jsonReader = jsonChunks.getReader()
@@ -588,7 +593,8 @@ describe('frame-decoder', () => {
         },
       })
 
-      const { getOrCreateStream, jsonChunks } = createFrameDecoder(input)
+      const { getStream: getOrCreateStream, chunks: jsonChunks } =
+        createFrameDecoder(input)
       const stream11 = getOrCreateStream(11)
 
       const jsonReader = jsonChunks.getReader()