fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5#1739

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Merged
Stephen Belanger (Qard) merged 4 commits into from
Apr 7, 2026
Merged

fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5 #1739

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43c72f2
fix(auto-instrumentation): Fix AI SDK streamText/streamObject and Age…
Qard Apr 4, 2026
8a97aa1
Fix up PR
lforst Apr 7, 2026
5fb8b52
Add e2e assertions
lforst Apr 7, 2026
bc5ba14
Merge branch 'main' into fix/ai-sdk-streaming-version-fixes
lforst Apr 7, 2026
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39 changes: 39 additions & 0 deletions e2e/scenarios/ai-sdk-instrumentation/assertions.ts
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -645,6 +645,7 @@ export function defineAISDKInstrumentationAssertions(options: {
agentSpanName?: AgentSpanName;
name: string;
runScenario: RunAISDKScenario;
sdkMajorVersion: number;
snapshotName: string;
supportsAttachmentScenario: boolean;
supportsDenyOutputOverrideScenario: boolean;
Expand DownExpand Up@@ -894,6 +895,32 @@ export function defineAISDKInstrumentationAssertions(options: {
});
}

if (options.sdkMajorVersion >= 4) {
test(
"captures sync streamText()/streamObject() paths in v4+",
testConfig,
() => {
const root = findLatestSpan(events, ROOT_NAME);
const streamTrace = findStreamTrace(events);

expectOperationParentedByRoot(streamTrace.operation, root);
expectAISDKParentSpan(streamTrace.parent);
expect(operationName(streamTrace.operation)).toBe("stream");
expect(streamTrace.parent?.span.name).toBe("streamText");

if (options.supportsStreamObject) {
const streamObjectTrace = findStreamObjectTrace(events);
expectOperationParentedByRoot(streamObjectTrace.operation, root);
expectAISDKParentSpan(streamObjectTrace.parent);
expect(operationName(streamObjectTrace.operation)).toBe(
"stream-object",
);
expect(streamObjectTrace.parent?.span.name).toBe("streamObject");
}
},
);
}

if (options.agentSpanName) {
test("captures trace for agent.generate()", testConfig, () => {
const root = findLatestSpan(events, ROOT_NAME);
Expand DownExpand Up@@ -922,6 +949,18 @@ export function defineAISDKInstrumentationAssertions(options: {
expect(trace.modelChildren.length).toBeGreaterThanOrEqual(1);
expect(trace.latestChild?.output).toBeDefined();
});

if (options.sdkMajorVersion === 5 && options.agentSpanName === "Agent") {
test("captures Agent.stream() path in v5", testConfig, () => {
const root = findLatestSpan(events, ROOT_NAME);
const trace = findAgentStreamTrace(events, "Agent");

expectOperationParentedByRoot(trace.operation, root);
expectAISDKParentSpan(trace.parent);
expect(operationName(trace.operation)).toBe("agent-stream");
expect(trace.parent?.span.name).toBe("Agent.stream");
});
}
}

if (options.supportsDenyOutputOverrideScenario) {
Expand Down
2 changes: 2 additions & 0 deletions e2e/scenarios/ai-sdk-instrumentation/scenario.test.ts
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -53,6 +53,7 @@ for (const scenario of aiSDKScenarios) {
supportsOutputObjectScenario,
supportsStreamObject: scenario.supportsStreamObject,
supportsToolExecution: scenario.supportsToolExecution,
sdkMajorVersion,
testFileUrl: import.meta.url,
timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
});
Expand All@@ -76,6 +77,7 @@ for (const scenario of aiSDKScenarios) {
supportsOutputObjectScenario,
supportsStreamObject: scenario.supportsStreamObject,
supportsToolExecution: scenario.supportsToolExecution,
sdkMajorVersion,
testFileUrl: import.meta.url,
timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
});
Expand Down
48 changes: 38 additions & 10 deletions js/src/auto-instrumentations/configs/ai-sdk.ts
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -39,19 +39,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
},
},

// streamText - function returning stream
// streamText - async function (v3 only, before the sync refactor in v4)
{
channelName: aiSDKChannels.streamText.channelName,
module: {
name: "ai",
versionRange: ">=3.0.0",
versionRange: ">=3.0.0 <4.0.0",
filePath: "dist/index.mjs",
},
functionQuery: {
functionName: "streamText",
kind: "Async",
},
},

// streamText - sync function returning stream (v4+)
{
channelName: aiSDKChannels.streamTextSync.channelName,
module: {
name: "ai",
versionRange: ">=4.0.0",
filePath: "dist/index.mjs",
},
functionQuery: {
functionName: "streamText",
kind: "Sync",
},
},
{
channelName: aiSDKChannels.streamText.channelName,
module: {
Expand DownExpand Up@@ -91,19 +105,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
},
},

// streamObject - function returning stream
// streamObject - async function (v3 only, before the sync refactor in v4)
{
channelName: aiSDKChannels.streamObject.channelName,
module: {
name: "ai",
versionRange: ">=3.0.0",
versionRange: ">=3.0.0 <4.0.0",
filePath: "dist/index.mjs",
},
functionQuery: {
functionName: "streamObject",
kind: "Async",
},
},

// streamObject - sync function returning stream (v4+)
{
channelName: aiSDKChannels.streamObjectSync.channelName,
module: {
name: "ai",
versionRange: ">=4.0.0",
filePath: "dist/index.mjs",
},
functionQuery: {
functionName: "streamObject",
kind: "Sync",
},
},
{
channelName: aiSDKChannels.streamObject.channelName,
module: {
Expand DownExpand Up@@ -147,32 +175,32 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
},
},

// Agent.stream - async method (v5 only)
// Agent.stream - sync method (v5 only)
// The compiled AI SDK bundle emits this as an anonymous class method, so we
// target the first async `stream` method in the file instead of a class name.
// target the first sync `stream` method in the file instead of a class name.
{
channelName: aiSDKChannels.agentStream.channelName,
channelName: aiSDKChannels.agentStreamSync.channelName,
module: {
name: "ai",
versionRange: ">=5.0.0 <6.0.0",
filePath: "dist/index.mjs",
},
functionQuery: {
methodName: "stream",
kind: "Async",
kind: "Sync",
index: 0,
},
},
{
channelName: aiSDKChannels.agentStream.channelName,
channelName: aiSDKChannels.agentStreamSync.channelName,
module: {
name: "ai",
versionRange: ">=5.0.0 <6.0.0",
filePath: "dist/index.js",
},
functionQuery: {
methodName: "stream",
kind: "Async",
kind: "Sync",
index: 0,
},
},
Expand Down
27 changes: 27 additions & 0 deletions js/src/instrumentation/plugins/ai-sdk-channels.ts
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -33,6 +33,15 @@ export const aiSDKChannels = defineChannels("ai", {
channelName: "streamText",
kind: "async",
}),
streamTextSync: channel<
[AISDKCallParams],
AISDKResult,
AISDKChannelContext,
unknown
>({
channelName: "streamText.sync",
kind: "sync-stream",
}),
generateObject: channel<
[AISDKCallParams],
AISDKStreamResult,
Expand All@@ -51,6 +60,15 @@ export const aiSDKChannels = defineChannels("ai", {
channelName: "streamObject",
kind: "async",
}),
streamObjectSync: channel<
[AISDKCallParams],
AISDKResult,
AISDKChannelContext,
unknown
>({
channelName: "streamObject.sync",
kind: "sync-stream",
}),
agentGenerate: channel<
[AISDKCallParams],
AISDKStreamResult,
Expand All@@ -69,6 +87,15 @@ export const aiSDKChannels = defineChannels("ai", {
channelName: "Agent.stream",
kind: "async",
}),
agentStreamSync: channel<
[AISDKCallParams],
AISDKResult,
AISDKChannelContext,
unknown
>({
channelName: "Agent.stream.sync",
kind: "sync-stream",
}),
toolLoopAgentGenerate: channel<
[AISDKCallParams],
AISDKStreamResult,
Expand Down
62 changes: 60 additions & 2 deletions js/src/instrumentation/plugins/ai-sdk-plugin.ts
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,9 @@
import { BasePlugin } from "../core";
import { traceStreamingChannel, unsubscribeAll } from "../core/channel-tracing";
import {
traceStreamingChannel,
traceSyncStreamChannel,
unsubscribeAll,
} from "../core/channel-tracing";
import { SpanTypeAttribute } from "../../../util/index";
import { getCurrentUnixTimestamp } from "../../util";
import { Attachment, type Span, withCurrent } from "../../logger";
Expand DownExpand Up@@ -144,6 +148,24 @@ export class AISDKPlugin extends BasePlugin {
}),
);

// streamText - sync function returning stream (v4+, used by auto-hook)
this.unsubscribers.push(
traceSyncStreamChannel(aiSDKChannels.streamTextSync, {
name: "streamText",
type: SpanTypeAttribute.LLM,
extractInput: ([params], event, span) =>
prepareAISDKInput(params, event, span, denyOutputPaths),
patchResult: ({ endEvent, result, span, startTime }) =>
patchAISDKStreamingResult({
defaultDenyOutputPaths: denyOutputPaths,
endEvent,
result,
span,
startTime,
}),
}),
);

// generateObject - async function that may return streams
this.unsubscribers.push(
traceStreamingChannel(aiSDKChannels.generateObject, {
Expand DownExpand Up@@ -190,6 +212,24 @@ export class AISDKPlugin extends BasePlugin {
}),
);

// streamObject - sync function returning stream (v4+, used by auto-hook)
this.unsubscribers.push(
traceSyncStreamChannel(aiSDKChannels.streamObjectSync, {
name: "streamObject",
type: SpanTypeAttribute.LLM,
extractInput: ([params], event, span) =>
prepareAISDKInput(params, event, span, denyOutputPaths),
patchResult: ({ endEvent, result, span, startTime }) =>
patchAISDKStreamingResult({
defaultDenyOutputPaths: denyOutputPaths,
endEvent,
result,
span,
startTime,
}),
}),
);

// Agent.generate - async method
this.unsubscribers.push(
traceStreamingChannel(aiSDKChannels.agentGenerate, {
Expand All@@ -210,7 +250,7 @@ export class AISDKPlugin extends BasePlugin {
}),
);

// Agent.stream - async method returning stream
// Agent.stream - async method returning stream (v5, used by wrapAISDK)
this.unsubscribers.push(
traceStreamingChannel(aiSDKChannels.agentStream, {
name: "Agent.stream",
Expand All@@ -236,6 +276,24 @@ export class AISDKPlugin extends BasePlugin {
}),
);

// Agent.stream - sync method returning stream (v5, used by auto-hook)
this.unsubscribers.push(
traceSyncStreamChannel(aiSDKChannels.agentStreamSync, {
name: "Agent.stream",
type: SpanTypeAttribute.LLM,
extractInput: ([params], event, span) =>
prepareAISDKInput(params, event, span, denyOutputPaths),
patchResult: ({ endEvent, result, span, startTime }) =>
patchAISDKStreamingResult({
defaultDenyOutputPaths: denyOutputPaths,
endEvent,
result,
span,
startTime,
}),
}),
);

// ToolLoopAgent.generate - async method
this.unsubscribers.push(
traceStreamingChannel(aiSDKChannels.toolLoopAgentGenerate, {
Expand Down
Loading
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5#1739

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privacy statement. We’ll occasionally send you account related emails.

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to your account

 Merged

Stephen Belanger (Qard)
merged 4 commits into

from

Apr 7, 2026
 Merged


fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5
#1739
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43c72f2

fix(auto-instrumentation): Fix AI SDK streamText/streamObject and Age…


Qard Apr 4, 2026
8a97aa1

Fix up PR


lforst Apr 7, 2026
5fb8b52

Add e2e assertions


lforst Apr 7, 2026
bc5ba14

Merge branch 'main' into fix/ai-sdk-streaming-version-fixes


lforst Apr 7, 2026

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39 changes: 39 additions & 0 deletions
e2e/scenarios/ai-sdk-instrumentation/assertions.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -645,6 +645,7 @@ export function defineAISDKInstrumentationAssertions(options: {
 agentSpanName?: AgentSpanName;
 name: string;
 runScenario: RunAISDKScenario;
 sdkMajorVersion: number;
 snapshotName: string;
 supportsAttachmentScenario: boolean;
 supportsDenyOutputOverrideScenario: boolean;
Expand DownExpand Up@@ -894,6 +895,32 @@ export function defineAISDKInstrumentationAssertions(options: {
 });
 }

 if (options.sdkMajorVersion >= 4) {
 test(
 "captures sync streamText()/streamObject() paths in v4+",
 testConfig,
 () => {
 const root = findLatestSpan(events, ROOT_NAME);
 const streamTrace = findStreamTrace(events);

 expectOperationParentedByRoot(streamTrace.operation, root);
 expectAISDKParentSpan(streamTrace.parent);
 expect(operationName(streamTrace.operation)).toBe("stream");
 expect(streamTrace.parent?.span.name).toBe("streamText");

 if (options.supportsStreamObject) {
 const streamObjectTrace = findStreamObjectTrace(events);
 expectOperationParentedByRoot(streamObjectTrace.operation, root);
 expectAISDKParentSpan(streamObjectTrace.parent);
 expect(operationName(streamObjectTrace.operation)).toBe(
 "stream-object",
 );
 expect(streamObjectTrace.parent?.span.name).toBe("streamObject");
 }
 },
 );
 }

 if (options.agentSpanName) {
 test("captures trace for agent.generate()", testConfig, () => {
 const root = findLatestSpan(events, ROOT_NAME);
Expand DownExpand Up@@ -922,6 +949,18 @@ export function defineAISDKInstrumentationAssertions(options: {
 expect(trace.modelChildren.length).toBeGreaterThanOrEqual(1);
 expect(trace.latestChild?.output).toBeDefined();
 });

 if (options.sdkMajorVersion === 5 && options.agentSpanName === "Agent") {
 test("captures Agent.stream() path in v5", testConfig, () => {
 const root = findLatestSpan(events, ROOT_NAME);
 const trace = findAgentStreamTrace(events, "Agent");

 expectOperationParentedByRoot(trace.operation, root);
 expectAISDKParentSpan(trace.parent);
 expect(operationName(trace.operation)).toBe("agent-stream");
 expect(trace.parent?.span.name).toBe("Agent.stream");
 });
 }
 }

 if (options.supportsDenyOutputOverrideScenario) {
Expand Down

2 changes: 2 additions & 0 deletions
e2e/scenarios/ai-sdk-instrumentation/scenario.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -53,6 +53,7 @@ for (const scenario of aiSDKScenarios) {
 supportsOutputObjectScenario,
 supportsStreamObject: scenario.supportsStreamObject,
 supportsToolExecution: scenario.supportsToolExecution,
 sdkMajorVersion,
 testFileUrl: import.meta.url,
 timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
 });
Expand All@@ -76,6 +77,7 @@ for (const scenario of aiSDKScenarios) {
 supportsOutputObjectScenario,
 supportsStreamObject: scenario.supportsStreamObject,
 supportsToolExecution: scenario.supportsToolExecution,
 sdkMajorVersion,
 testFileUrl: import.meta.url,
 timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
 });
Expand Down

48 changes: 38 additions & 10 deletions
js/src/auto-instrumentations/configs/ai-sdk.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -39,19 +39,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // streamText - function returning stream
 // streamText - async function (v3 only, before the sync refactor in v4)
 {
 channelName: aiSDKChannels.streamText.channelName,
 module: {
 name: "ai",
 versionRange: ">=3.0.0",
 versionRange: ">=3.0.0 <4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamText",
 kind: "Async",
 },
 },

 // streamText - sync function returning stream (v4+)
 {
 channelName: aiSDKChannels.streamTextSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamText",
 kind: "Sync",
 },
 },
 {
 channelName: aiSDKChannels.streamText.channelName,
 module: {
Expand DownExpand Up@@ -91,19 +105,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // streamObject - function returning stream
 // streamObject - async function (v3 only, before the sync refactor in v4)
 {
 channelName: aiSDKChannels.streamObject.channelName,
 module: {
 name: "ai",
 versionRange: ">=3.0.0",
 versionRange: ">=3.0.0 <4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamObject",
 kind: "Async",
 },
 },

 // streamObject - sync function returning stream (v4+)
 {
 channelName: aiSDKChannels.streamObjectSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamObject",
 kind: "Sync",
 },
 },
 {
 channelName: aiSDKChannels.streamObject.channelName,
 module: {
Expand DownExpand Up@@ -147,32 +175,32 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // Agent.stream - async method (v5 only)
 // Agent.stream - sync method (v5 only)
 // The compiled AI SDK bundle emits this as an anonymous class method, so we
 // target the first async `stream` method in the file instead of a class name.
 // target the first sync `stream` method in the file instead of a class name.
 {
 channelName: aiSDKChannels.agentStream.channelName,
 channelName: aiSDKChannels.agentStreamSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=5.0.0 <6.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 methodName: "stream",
 kind: "Async",
 kind: "Sync",
 index: 0,
 },
 },
 {
 channelName: aiSDKChannels.agentStream.channelName,
 channelName: aiSDKChannels.agentStreamSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=5.0.0 <6.0.0",
 filePath: "dist/index.js",
 },
 functionQuery: {
 methodName: "stream",
 kind: "Async",
 kind: "Sync",
 index: 0,
 },
 },
Expand Down

27 changes: 27 additions & 0 deletions
js/src/instrumentation/plugins/ai-sdk-channels.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -33,6 +33,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "streamText",
 kind: "async",
 }),
 streamTextSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "streamText.sync",
 kind: "sync-stream",
 }),
 generateObject: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand All@@ -51,6 +60,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "streamObject",
 kind: "async",
 }),
 streamObjectSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "streamObject.sync",
 kind: "sync-stream",
 }),
 agentGenerate: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand All@@ -69,6 +87,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "Agent.stream",
 kind: "async",
 }),
 agentStreamSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "Agent.stream.sync",
 kind: "sync-stream",
 }),
 toolLoopAgentGenerate: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand Down

62 changes: 60 additions & 2 deletions
js/src/instrumentation/plugins/ai-sdk-plugin.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,5 +1,9 @@
import { BasePlugin } from "../core";
import { traceStreamingChannel, unsubscribeAll } from "../core/channel-tracing";
import {
 traceStreamingChannel,
 traceSyncStreamChannel,
 unsubscribeAll,
} from "../core/channel-tracing";
import { SpanTypeAttribute } from "../../../util/index";
import { getCurrentUnixTimestamp } from "../../util";
import { Attachment, type Span, withCurrent } from "../../logger";
Expand DownExpand Up@@ -144,6 +148,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // streamText - sync function returning stream (v4+, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.streamTextSync, {
 name: "streamText",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // generateObject - async function that may return streams
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.generateObject, {
Expand DownExpand Up@@ -190,6 +212,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // streamObject - sync function returning stream (v4+, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.streamObjectSync, {
 name: "streamObject",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // Agent.generate - async method
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.agentGenerate, {
Expand All@@ -210,7 +250,7 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // Agent.stream - async method returning stream
 // Agent.stream - async method returning stream (v5, used by wrapAISDK)
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.agentStream, {
 name: "Agent.stream",
Expand All@@ -236,6 +276,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // Agent.stream - sync method returning stream (v5, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.agentStreamSync, {
 name: "Agent.stream",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // ToolLoopAgent.generate - async method
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.toolLoopAgentGenerate, {
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5#1739

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 Merged

Stephen Belanger (Qard)
merged 4 commits into

from

Apr 7, 2026
 Merged


fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5
#1739
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43c72f2

fix(auto-instrumentation): Fix AI SDK streamText/streamObject and Age…


Qard Apr 4, 2026
8a97aa1

Fix up PR


lforst Apr 7, 2026
5fb8b52

Add e2e assertions


lforst Apr 7, 2026
bc5ba14

Merge branch 'main' into fix/ai-sdk-streaming-version-fixes


lforst Apr 7, 2026

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39 changes: 39 additions & 0 deletions
e2e/scenarios/ai-sdk-instrumentation/assertions.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -645,6 +645,7 @@ export function defineAISDKInstrumentationAssertions(options: {
 agentSpanName?: AgentSpanName;
 name: string;
 runScenario: RunAISDKScenario;
 sdkMajorVersion: number;
 snapshotName: string;
 supportsAttachmentScenario: boolean;
 supportsDenyOutputOverrideScenario: boolean;
Expand DownExpand Up@@ -894,6 +895,32 @@ export function defineAISDKInstrumentationAssertions(options: {
 });
 }

 if (options.sdkMajorVersion >= 4) {
 test(
 "captures sync streamText()/streamObject() paths in v4+",
 testConfig,
 () => {
 const root = findLatestSpan(events, ROOT_NAME);
 const streamTrace = findStreamTrace(events);

 expectOperationParentedByRoot(streamTrace.operation, root);
 expectAISDKParentSpan(streamTrace.parent);
 expect(operationName(streamTrace.operation)).toBe("stream");
 expect(streamTrace.parent?.span.name).toBe("streamText");

 if (options.supportsStreamObject) {
 const streamObjectTrace = findStreamObjectTrace(events);
 expectOperationParentedByRoot(streamObjectTrace.operation, root);
 expectAISDKParentSpan(streamObjectTrace.parent);
 expect(operationName(streamObjectTrace.operation)).toBe(
 "stream-object",
 );
 expect(streamObjectTrace.parent?.span.name).toBe("streamObject");
 }
 },
 );
 }

 if (options.agentSpanName) {
 test("captures trace for agent.generate()", testConfig, () => {
 const root = findLatestSpan(events, ROOT_NAME);
Expand DownExpand Up@@ -922,6 +949,18 @@ export function defineAISDKInstrumentationAssertions(options: {
 expect(trace.modelChildren.length).toBeGreaterThanOrEqual(1);
 expect(trace.latestChild?.output).toBeDefined();
 });

 if (options.sdkMajorVersion === 5 && options.agentSpanName === "Agent") {
 test("captures Agent.stream() path in v5", testConfig, () => {
 const root = findLatestSpan(events, ROOT_NAME);
 const trace = findAgentStreamTrace(events, "Agent");

 expectOperationParentedByRoot(trace.operation, root);
 expectAISDKParentSpan(trace.parent);
 expect(operationName(trace.operation)).toBe("agent-stream");
 expect(trace.parent?.span.name).toBe("Agent.stream");
 });
 }
 }

 if (options.supportsDenyOutputOverrideScenario) {
Expand Down

2 changes: 2 additions & 0 deletions
e2e/scenarios/ai-sdk-instrumentation/scenario.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -53,6 +53,7 @@ for (const scenario of aiSDKScenarios) {
 supportsOutputObjectScenario,
 supportsStreamObject: scenario.supportsStreamObject,
 supportsToolExecution: scenario.supportsToolExecution,
 sdkMajorVersion,
 testFileUrl: import.meta.url,
 timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
 });
Expand All@@ -76,6 +77,7 @@ for (const scenario of aiSDKScenarios) {
 supportsOutputObjectScenario,
 supportsStreamObject: scenario.supportsStreamObject,
 supportsToolExecution: scenario.supportsToolExecution,
 sdkMajorVersion,
 testFileUrl: import.meta.url,
 timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
 });
Expand Down

48 changes: 38 additions & 10 deletions
js/src/auto-instrumentations/configs/ai-sdk.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -39,19 +39,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // streamText - function returning stream
 // streamText - async function (v3 only, before the sync refactor in v4)
 {
 channelName: aiSDKChannels.streamText.channelName,
 module: {
 name: "ai",
 versionRange: ">=3.0.0",
 versionRange: ">=3.0.0 <4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamText",
 kind: "Async",
 },
 },

 // streamText - sync function returning stream (v4+)
 {
 channelName: aiSDKChannels.streamTextSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamText",
 kind: "Sync",
 },
 },
 {
 channelName: aiSDKChannels.streamText.channelName,
 module: {
Expand DownExpand Up@@ -91,19 +105,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // streamObject - function returning stream
 // streamObject - async function (v3 only, before the sync refactor in v4)
 {
 channelName: aiSDKChannels.streamObject.channelName,
 module: {
 name: "ai",
 versionRange: ">=3.0.0",
 versionRange: ">=3.0.0 <4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamObject",
 kind: "Async",
 },
 },

 // streamObject - sync function returning stream (v4+)
 {
 channelName: aiSDKChannels.streamObjectSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamObject",
 kind: "Sync",
 },
 },
 {
 channelName: aiSDKChannels.streamObject.channelName,
 module: {
Expand DownExpand Up@@ -147,32 +175,32 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // Agent.stream - async method (v5 only)
 // Agent.stream - sync method (v5 only)
 // The compiled AI SDK bundle emits this as an anonymous class method, so we
 // target the first async `stream` method in the file instead of a class name.
 // target the first sync `stream` method in the file instead of a class name.
 {
 channelName: aiSDKChannels.agentStream.channelName,
 channelName: aiSDKChannels.agentStreamSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=5.0.0 <6.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 methodName: "stream",
 kind: "Async",
 kind: "Sync",
 index: 0,
 },
 },
 {
 channelName: aiSDKChannels.agentStream.channelName,
 channelName: aiSDKChannels.agentStreamSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=5.0.0 <6.0.0",
 filePath: "dist/index.js",
 },
 functionQuery: {
 methodName: "stream",
 kind: "Async",
 kind: "Sync",
 index: 0,
 },
 },
Expand Down

27 changes: 27 additions & 0 deletions
js/src/instrumentation/plugins/ai-sdk-channels.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -33,6 +33,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "streamText",
 kind: "async",
 }),
 streamTextSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "streamText.sync",
 kind: "sync-stream",
 }),
 generateObject: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand All@@ -51,6 +60,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "streamObject",
 kind: "async",
 }),
 streamObjectSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "streamObject.sync",
 kind: "sync-stream",
 }),
 agentGenerate: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand All@@ -69,6 +87,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "Agent.stream",
 kind: "async",
 }),
 agentStreamSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "Agent.stream.sync",
 kind: "sync-stream",
 }),
 toolLoopAgentGenerate: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand Down

62 changes: 60 additions & 2 deletions
js/src/instrumentation/plugins/ai-sdk-plugin.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,5 +1,9 @@
import { BasePlugin } from "../core";
import { traceStreamingChannel, unsubscribeAll } from "../core/channel-tracing";
import {
 traceStreamingChannel,
 traceSyncStreamChannel,
 unsubscribeAll,
} from "../core/channel-tracing";
import { SpanTypeAttribute } from "../../../util/index";
import { getCurrentUnixTimestamp } from "../../util";
import { Attachment, type Span, withCurrent } from "../../logger";
Expand DownExpand Up@@ -144,6 +148,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // streamText - sync function returning stream (v4+, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.streamTextSync, {
 name: "streamText",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // generateObject - async function that may return streams
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.generateObject, {
Expand DownExpand Up@@ -190,6 +212,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // streamObject - sync function returning stream (v4+, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.streamObjectSync, {
 name: "streamObject",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // Agent.generate - async method
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.agentGenerate, {
Expand All@@ -210,7 +250,7 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // Agent.stream - async method returning stream
 // Agent.stream - async method returning stream (v5, used by wrapAISDK)
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.agentStream, {
 name: "Agent.stream",
Expand All@@ -236,6 +276,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // Agent.stream - sync method returning stream (v5, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.agentStreamSync, {
 name: "Agent.stream",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // ToolLoopAgent.generate - async method
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.toolLoopAgentGenerate, {
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5#1739

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privacy statement. We’ll occasionally send you account related emails.

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Sign in
to your account

 Merged

Stephen Belanger (Qard)
merged 4 commits into

from

Apr 7, 2026
 Merged


fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5
#1739
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43c72f2

fix(auto-instrumentation): Fix AI SDK streamText/streamObject and Age…


Qard Apr 4, 2026
8a97aa1

Fix up PR


lforst Apr 7, 2026
5fb8b52

Add e2e assertions


lforst Apr 7, 2026
bc5ba14

Merge branch 'main' into fix/ai-sdk-streaming-version-fixes


lforst Apr 7, 2026

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39 changes: 39 additions & 0 deletions
e2e/scenarios/ai-sdk-instrumentation/assertions.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -645,6 +645,7 @@ export function defineAISDKInstrumentationAssertions(options: {
 agentSpanName?: AgentSpanName;
 name: string;
 runScenario: RunAISDKScenario;
 sdkMajorVersion: number;
 snapshotName: string;
 supportsAttachmentScenario: boolean;
 supportsDenyOutputOverrideScenario: boolean;
Expand DownExpand Up@@ -894,6 +895,32 @@ export function defineAISDKInstrumentationAssertions(options: {
 });
 }

 if (options.sdkMajorVersion >= 4) {
 test(
 "captures sync streamText()/streamObject() paths in v4+",
 testConfig,
 () => {
 const root = findLatestSpan(events, ROOT_NAME);
 const streamTrace = findStreamTrace(events);

 expectOperationParentedByRoot(streamTrace.operation, root);
 expectAISDKParentSpan(streamTrace.parent);
 expect(operationName(streamTrace.operation)).toBe("stream");
 expect(streamTrace.parent?.span.name).toBe("streamText");

 if (options.supportsStreamObject) {
 const streamObjectTrace = findStreamObjectTrace(events);
 expectOperationParentedByRoot(streamObjectTrace.operation, root);
 expectAISDKParentSpan(streamObjectTrace.parent);
 expect(operationName(streamObjectTrace.operation)).toBe(
 "stream-object",
 );
 expect(streamObjectTrace.parent?.span.name).toBe("streamObject");
 }
 },
 );
 }

 if (options.agentSpanName) {
 test("captures trace for agent.generate()", testConfig, () => {
 const root = findLatestSpan(events, ROOT_NAME);
Expand DownExpand Up@@ -922,6 +949,18 @@ export function defineAISDKInstrumentationAssertions(options: {
 expect(trace.modelChildren.length).toBeGreaterThanOrEqual(1);
 expect(trace.latestChild?.output).toBeDefined();
 });

 if (options.sdkMajorVersion === 5 && options.agentSpanName === "Agent") {
 test("captures Agent.stream() path in v5", testConfig, () => {
 const root = findLatestSpan(events, ROOT_NAME);
 const trace = findAgentStreamTrace(events, "Agent");

 expectOperationParentedByRoot(trace.operation, root);
 expectAISDKParentSpan(trace.parent);
 expect(operationName(trace.operation)).toBe("agent-stream");
 expect(trace.parent?.span.name).toBe("Agent.stream");
 });
 }
 }

 if (options.supportsDenyOutputOverrideScenario) {
Expand Down

2 changes: 2 additions & 0 deletions
e2e/scenarios/ai-sdk-instrumentation/scenario.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -53,6 +53,7 @@ for (const scenario of aiSDKScenarios) {
 supportsOutputObjectScenario,
 supportsStreamObject: scenario.supportsStreamObject,
 supportsToolExecution: scenario.supportsToolExecution,
 sdkMajorVersion,
 testFileUrl: import.meta.url,
 timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
 });
Expand All@@ -76,6 +77,7 @@ for (const scenario of aiSDKScenarios) {
 supportsOutputObjectScenario,
 supportsStreamObject: scenario.supportsStreamObject,
 supportsToolExecution: scenario.supportsToolExecution,
 sdkMajorVersion,
 testFileUrl: import.meta.url,
 timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
 });
Expand Down

48 changes: 38 additions & 10 deletions
js/src/auto-instrumentations/configs/ai-sdk.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -39,19 +39,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // streamText - function returning stream
 // streamText - async function (v3 only, before the sync refactor in v4)
 {
 channelName: aiSDKChannels.streamText.channelName,
 module: {
 name: "ai",
 versionRange: ">=3.0.0",
 versionRange: ">=3.0.0 <4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamText",
 kind: "Async",
 },
 },

 // streamText - sync function returning stream (v4+)
 {
 channelName: aiSDKChannels.streamTextSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamText",
 kind: "Sync",
 },
 },
 {
 channelName: aiSDKChannels.streamText.channelName,
 module: {
Expand DownExpand Up@@ -91,19 +105,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // streamObject - function returning stream
 // streamObject - async function (v3 only, before the sync refactor in v4)
 {
 channelName: aiSDKChannels.streamObject.channelName,
 module: {
 name: "ai",
 versionRange: ">=3.0.0",
 versionRange: ">=3.0.0 <4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamObject",
 kind: "Async",
 },
 },

 // streamObject - sync function returning stream (v4+)
 {
 channelName: aiSDKChannels.streamObjectSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamObject",
 kind: "Sync",
 },
 },
 {
 channelName: aiSDKChannels.streamObject.channelName,
 module: {
Expand DownExpand Up@@ -147,32 +175,32 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // Agent.stream - async method (v5 only)
 // Agent.stream - sync method (v5 only)
 // The compiled AI SDK bundle emits this as an anonymous class method, so we
 // target the first async `stream` method in the file instead of a class name.
 // target the first sync `stream` method in the file instead of a class name.
 {
 channelName: aiSDKChannels.agentStream.channelName,
 channelName: aiSDKChannels.agentStreamSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=5.0.0 <6.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 methodName: "stream",
 kind: "Async",
 kind: "Sync",
 index: 0,
 },
 },
 {
 channelName: aiSDKChannels.agentStream.channelName,
 channelName: aiSDKChannels.agentStreamSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=5.0.0 <6.0.0",
 filePath: "dist/index.js",
 },
 functionQuery: {
 methodName: "stream",
 kind: "Async",
 kind: "Sync",
 index: 0,
 },
 },
Expand Down

27 changes: 27 additions & 0 deletions
js/src/instrumentation/plugins/ai-sdk-channels.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -33,6 +33,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "streamText",
 kind: "async",
 }),
 streamTextSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "streamText.sync",
 kind: "sync-stream",
 }),
 generateObject: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand All@@ -51,6 +60,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "streamObject",
 kind: "async",
 }),
 streamObjectSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "streamObject.sync",
 kind: "sync-stream",
 }),
 agentGenerate: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand All@@ -69,6 +87,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "Agent.stream",
 kind: "async",
 }),
 agentStreamSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "Agent.stream.sync",
 kind: "sync-stream",
 }),
 toolLoopAgentGenerate: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand Down

62 changes: 60 additions & 2 deletions
js/src/instrumentation/plugins/ai-sdk-plugin.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,5 +1,9 @@
import { BasePlugin } from "../core";
import { traceStreamingChannel, unsubscribeAll } from "../core/channel-tracing";
import {
 traceStreamingChannel,
 traceSyncStreamChannel,
 unsubscribeAll,
} from "../core/channel-tracing";
import { SpanTypeAttribute } from "../../../util/index";
import { getCurrentUnixTimestamp } from "../../util";
import { Attachment, type Span, withCurrent } from "../../logger";
Expand DownExpand Up@@ -144,6 +148,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // streamText - sync function returning stream (v4+, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.streamTextSync, {
 name: "streamText",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // generateObject - async function that may return streams
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.generateObject, {
Expand DownExpand Up@@ -190,6 +212,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // streamObject - sync function returning stream (v4+, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.streamObjectSync, {
 name: "streamObject",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // Agent.generate - async method
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.agentGenerate, {
Expand All@@ -210,7 +250,7 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // Agent.stream - async method returning stream
 // Agent.stream - async method returning stream (v5, used by wrapAISDK)
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.agentStream, {
 name: "Agent.stream",
Expand All@@ -236,6 +276,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // Agent.stream - sync method returning stream (v5, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.agentStreamSync, {
 name: "Agent.stream",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // ToolLoopAgent.generate - async method
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.toolLoopAgentGenerate, {
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5#1739

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 Merged

Stephen Belanger (Qard)
merged 4 commits into

from

Apr 7, 2026
 Merged


fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5
#1739
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43c72f2

fix(auto-instrumentation): Fix AI SDK streamText/streamObject and Age…


Qard Apr 4, 2026
8a97aa1

Fix up PR


lforst Apr 7, 2026
5fb8b52

Add e2e assertions


lforst Apr 7, 2026
bc5ba14

Merge branch 'main' into fix/ai-sdk-streaming-version-fixes


lforst Apr 7, 2026

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39 changes: 39 additions & 0 deletions
e2e/scenarios/ai-sdk-instrumentation/assertions.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -645,6 +645,7 @@ export function defineAISDKInstrumentationAssertions(options: {
 agentSpanName?: AgentSpanName;
 name: string;
 runScenario: RunAISDKScenario;
 sdkMajorVersion: number;
 snapshotName: string;
 supportsAttachmentScenario: boolean;
 supportsDenyOutputOverrideScenario: boolean;
Expand DownExpand Up@@ -894,6 +895,32 @@ export function defineAISDKInstrumentationAssertions(options: {
 });
 }

 if (options.sdkMajorVersion >= 4) {
 test(
 "captures sync streamText()/streamObject() paths in v4+",
 testConfig,
 () => {
 const root = findLatestSpan(events, ROOT_NAME);
 const streamTrace = findStreamTrace(events);

 expectOperationParentedByRoot(streamTrace.operation, root);
 expectAISDKParentSpan(streamTrace.parent);
 expect(operationName(streamTrace.operation)).toBe("stream");
 expect(streamTrace.parent?.span.name).toBe("streamText");

 if (options.supportsStreamObject) {
 const streamObjectTrace = findStreamObjectTrace(events);
 expectOperationParentedByRoot(streamObjectTrace.operation, root);
 expectAISDKParentSpan(streamObjectTrace.parent);
 expect(operationName(streamObjectTrace.operation)).toBe(
 "stream-object",
 );
 expect(streamObjectTrace.parent?.span.name).toBe("streamObject");
 }
 },
 );
 }

 if (options.agentSpanName) {
 test("captures trace for agent.generate()", testConfig, () => {
 const root = findLatestSpan(events, ROOT_NAME);
Expand DownExpand Up@@ -922,6 +949,18 @@ export function defineAISDKInstrumentationAssertions(options: {
 expect(trace.modelChildren.length).toBeGreaterThanOrEqual(1);
 expect(trace.latestChild?.output).toBeDefined();
 });

 if (options.sdkMajorVersion === 5 && options.agentSpanName === "Agent") {
 test("captures Agent.stream() path in v5", testConfig, () => {
 const root = findLatestSpan(events, ROOT_NAME);
 const trace = findAgentStreamTrace(events, "Agent");

 expectOperationParentedByRoot(trace.operation, root);
 expectAISDKParentSpan(trace.parent);
 expect(operationName(trace.operation)).toBe("agent-stream");
 expect(trace.parent?.span.name).toBe("Agent.stream");
 });
 }
 }

 if (options.supportsDenyOutputOverrideScenario) {
Expand Down

2 changes: 2 additions & 0 deletions
e2e/scenarios/ai-sdk-instrumentation/scenario.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -53,6 +53,7 @@ for (const scenario of aiSDKScenarios) {
 supportsOutputObjectScenario,
 supportsStreamObject: scenario.supportsStreamObject,
 supportsToolExecution: scenario.supportsToolExecution,
 sdkMajorVersion,
 testFileUrl: import.meta.url,
 timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
 });
Expand All@@ -76,6 +77,7 @@ for (const scenario of aiSDKScenarios) {
 supportsOutputObjectScenario,
 supportsStreamObject: scenario.supportsStreamObject,
 supportsToolExecution: scenario.supportsToolExecution,
 sdkMajorVersion,
 testFileUrl: import.meta.url,
 timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
 });
Expand Down

48 changes: 38 additions & 10 deletions
js/src/auto-instrumentations/configs/ai-sdk.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -39,19 +39,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // streamText - function returning stream
 // streamText - async function (v3 only, before the sync refactor in v4)
 {
 channelName: aiSDKChannels.streamText.channelName,
 module: {
 name: "ai",
 versionRange: ">=3.0.0",
 versionRange: ">=3.0.0 <4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamText",
 kind: "Async",
 },
 },

 // streamText - sync function returning stream (v4+)
 {
 channelName: aiSDKChannels.streamTextSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamText",
 kind: "Sync",
 },
 },
 {
 channelName: aiSDKChannels.streamText.channelName,
 module: {
Expand DownExpand Up@@ -91,19 +105,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // streamObject - function returning stream
 // streamObject - async function (v3 only, before the sync refactor in v4)
 {
 channelName: aiSDKChannels.streamObject.channelName,
 module: {
 name: "ai",
 versionRange: ">=3.0.0",
 versionRange: ">=3.0.0 <4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamObject",
 kind: "Async",
 },
 },

 // streamObject - sync function returning stream (v4+)
 {
 channelName: aiSDKChannels.streamObjectSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamObject",
 kind: "Sync",
 },
 },
 {
 channelName: aiSDKChannels.streamObject.channelName,
 module: {
Expand DownExpand Up@@ -147,32 +175,32 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // Agent.stream - async method (v5 only)
 // Agent.stream - sync method (v5 only)
 // The compiled AI SDK bundle emits this as an anonymous class method, so we
 // target the first async `stream` method in the file instead of a class name.
 // target the first sync `stream` method in the file instead of a class name.
 {
 channelName: aiSDKChannels.agentStream.channelName,
 channelName: aiSDKChannels.agentStreamSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=5.0.0 <6.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 methodName: "stream",
 kind: "Async",
 kind: "Sync",
 index: 0,
 },
 },
 {
 channelName: aiSDKChannels.agentStream.channelName,
 channelName: aiSDKChannels.agentStreamSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=5.0.0 <6.0.0",
 filePath: "dist/index.js",
 },
 functionQuery: {
 methodName: "stream",
 kind: "Async",
 kind: "Sync",
 index: 0,
 },
 },
Expand Down

27 changes: 27 additions & 0 deletions
js/src/instrumentation/plugins/ai-sdk-channels.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -33,6 +33,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "streamText",
 kind: "async",
 }),
 streamTextSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "streamText.sync",
 kind: "sync-stream",
 }),
 generateObject: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand All@@ -51,6 +60,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "streamObject",
 kind: "async",
 }),
 streamObjectSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "streamObject.sync",
 kind: "sync-stream",
 }),
 agentGenerate: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand All@@ -69,6 +87,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "Agent.stream",
 kind: "async",
 }),
 agentStreamSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "Agent.stream.sync",
 kind: "sync-stream",
 }),
 toolLoopAgentGenerate: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand Down

62 changes: 60 additions & 2 deletions
js/src/instrumentation/plugins/ai-sdk-plugin.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,5 +1,9 @@
import { BasePlugin } from "../core";
import { traceStreamingChannel, unsubscribeAll } from "../core/channel-tracing";
import {
 traceStreamingChannel,
 traceSyncStreamChannel,
 unsubscribeAll,
} from "../core/channel-tracing";
import { SpanTypeAttribute } from "../../../util/index";
import { getCurrentUnixTimestamp } from "../../util";
import { Attachment, type Span, withCurrent } from "../../logger";
Expand DownExpand Up@@ -144,6 +148,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // streamText - sync function returning stream (v4+, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.streamTextSync, {
 name: "streamText",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // generateObject - async function that may return streams
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.generateObject, {
Expand DownExpand Up@@ -190,6 +212,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // streamObject - sync function returning stream (v4+, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.streamObjectSync, {
 name: "streamObject",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // Agent.generate - async method
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.agentGenerate, {
Expand All@@ -210,7 +250,7 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // Agent.stream - async method returning stream
 // Agent.stream - async method returning stream (v5, used by wrapAISDK)
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.agentStream, {
 name: "Agent.stream",
Expand All@@ -236,6 +276,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // Agent.stream - sync method returning stream (v5, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.agentStreamSync, {
 name: "Agent.stream",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // ToolLoopAgent.generate - async method
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.toolLoopAgentGenerate, {
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5#1739

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

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By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Merged

Stephen Belanger (Qard)
merged 4 commits into

from

Apr 7, 2026
 Merged


fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5
#1739
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43c72f2

fix(auto-instrumentation): Fix AI SDK streamText/streamObject and Age…


Qard Apr 4, 2026
8a97aa1

Fix up PR


lforst Apr 7, 2026
5fb8b52

Add e2e assertions


lforst Apr 7, 2026
bc5ba14

Merge branch 'main' into fix/ai-sdk-streaming-version-fixes


lforst Apr 7, 2026

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39 changes: 39 additions & 0 deletions
e2e/scenarios/ai-sdk-instrumentation/assertions.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -645,6 +645,7 @@ export function defineAISDKInstrumentationAssertions(options: {
 agentSpanName?: AgentSpanName;
 name: string;
 runScenario: RunAISDKScenario;
 sdkMajorVersion: number;
 snapshotName: string;
 supportsAttachmentScenario: boolean;
 supportsDenyOutputOverrideScenario: boolean;
Expand DownExpand Up@@ -894,6 +895,32 @@ export function defineAISDKInstrumentationAssertions(options: {
 });
 }

 if (options.sdkMajorVersion >= 4) {
 test(
 "captures sync streamText()/streamObject() paths in v4+",
 testConfig,
 () => {
 const root = findLatestSpan(events, ROOT_NAME);
 const streamTrace = findStreamTrace(events);

 expectOperationParentedByRoot(streamTrace.operation, root);
 expectAISDKParentSpan(streamTrace.parent);
 expect(operationName(streamTrace.operation)).toBe("stream");
 expect(streamTrace.parent?.span.name).toBe("streamText");

 if (options.supportsStreamObject) {
 const streamObjectTrace = findStreamObjectTrace(events);
 expectOperationParentedByRoot(streamObjectTrace.operation, root);
 expectAISDKParentSpan(streamObjectTrace.parent);
 expect(operationName(streamObjectTrace.operation)).toBe(
 "stream-object",
 );
 expect(streamObjectTrace.parent?.span.name).toBe("streamObject");
 }
 },
 );
 }

 if (options.agentSpanName) {
 test("captures trace for agent.generate()", testConfig, () => {
 const root = findLatestSpan(events, ROOT_NAME);
Expand DownExpand Up@@ -922,6 +949,18 @@ export function defineAISDKInstrumentationAssertions(options: {
 expect(trace.modelChildren.length).toBeGreaterThanOrEqual(1);
 expect(trace.latestChild?.output).toBeDefined();
 });

 if (options.sdkMajorVersion === 5 && options.agentSpanName === "Agent") {
 test("captures Agent.stream() path in v5", testConfig, () => {
 const root = findLatestSpan(events, ROOT_NAME);
 const trace = findAgentStreamTrace(events, "Agent");

 expectOperationParentedByRoot(trace.operation, root);
 expectAISDKParentSpan(trace.parent);
 expect(operationName(trace.operation)).toBe("agent-stream");
 expect(trace.parent?.span.name).toBe("Agent.stream");
 });
 }
 }

 if (options.supportsDenyOutputOverrideScenario) {
Expand Down

2 changes: 2 additions & 0 deletions
e2e/scenarios/ai-sdk-instrumentation/scenario.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -53,6 +53,7 @@ for (const scenario of aiSDKScenarios) {
 supportsOutputObjectScenario,
 supportsStreamObject: scenario.supportsStreamObject,
 supportsToolExecution: scenario.supportsToolExecution,
 sdkMajorVersion,
 testFileUrl: import.meta.url,
 timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
 });
Expand All@@ -76,6 +77,7 @@ for (const scenario of aiSDKScenarios) {
 supportsOutputObjectScenario,
 supportsStreamObject: scenario.supportsStreamObject,
 supportsToolExecution: scenario.supportsToolExecution,
 sdkMajorVersion,
 testFileUrl: import.meta.url,
 timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
 });
Expand Down

48 changes: 38 additions & 10 deletions
js/src/auto-instrumentations/configs/ai-sdk.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -39,19 +39,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // streamText - function returning stream
 // streamText - async function (v3 only, before the sync refactor in v4)
 {
 channelName: aiSDKChannels.streamText.channelName,
 module: {
 name: "ai",
 versionRange: ">=3.0.0",
 versionRange: ">=3.0.0 <4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamText",
 kind: "Async",
 },
 },

 // streamText - sync function returning stream (v4+)
 {
 channelName: aiSDKChannels.streamTextSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamText",
 kind: "Sync",
 },
 },
 {
 channelName: aiSDKChannels.streamText.channelName,
 module: {
Expand DownExpand Up@@ -91,19 +105,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // streamObject - function returning stream
 // streamObject - async function (v3 only, before the sync refactor in v4)
 {
 channelName: aiSDKChannels.streamObject.channelName,
 module: {
 name: "ai",
 versionRange: ">=3.0.0",
 versionRange: ">=3.0.0 <4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamObject",
 kind: "Async",
 },
 },

 // streamObject - sync function returning stream (v4+)
 {
 channelName: aiSDKChannels.streamObjectSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamObject",
 kind: "Sync",
 },
 },
 {
 channelName: aiSDKChannels.streamObject.channelName,
 module: {
Expand DownExpand Up@@ -147,32 +175,32 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // Agent.stream - async method (v5 only)
 // Agent.stream - sync method (v5 only)
 // The compiled AI SDK bundle emits this as an anonymous class method, so we
 // target the first async `stream` method in the file instead of a class name.
 // target the first sync `stream` method in the file instead of a class name.
 {
 channelName: aiSDKChannels.agentStream.channelName,
 channelName: aiSDKChannels.agentStreamSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=5.0.0 <6.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 methodName: "stream",
 kind: "Async",
 kind: "Sync",
 index: 0,
 },
 },
 {
 channelName: aiSDKChannels.agentStream.channelName,
 channelName: aiSDKChannels.agentStreamSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=5.0.0 <6.0.0",
 filePath: "dist/index.js",
 },
 functionQuery: {
 methodName: "stream",
 kind: "Async",
 kind: "Sync",
 index: 0,
 },
 },
Expand Down

27 changes: 27 additions & 0 deletions
js/src/instrumentation/plugins/ai-sdk-channels.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -33,6 +33,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "streamText",
 kind: "async",
 }),
 streamTextSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "streamText.sync",
 kind: "sync-stream",
 }),
 generateObject: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand All@@ -51,6 +60,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "streamObject",
 kind: "async",
 }),
 streamObjectSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "streamObject.sync",
 kind: "sync-stream",
 }),
 agentGenerate: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand All@@ -69,6 +87,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "Agent.stream",
 kind: "async",
 }),
 agentStreamSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "Agent.stream.sync",
 kind: "sync-stream",
 }),
 toolLoopAgentGenerate: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand Down

62 changes: 60 additions & 2 deletions
js/src/instrumentation/plugins/ai-sdk-plugin.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,5 +1,9 @@
import { BasePlugin } from "../core";
import { traceStreamingChannel, unsubscribeAll } from "../core/channel-tracing";
import {
 traceStreamingChannel,
 traceSyncStreamChannel,
 unsubscribeAll,
} from "../core/channel-tracing";
import { SpanTypeAttribute } from "../../../util/index";
import { getCurrentUnixTimestamp } from "../../util";
import { Attachment, type Span, withCurrent } from "../../logger";
Expand DownExpand Up@@ -144,6 +148,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // streamText - sync function returning stream (v4+, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.streamTextSync, {
 name: "streamText",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // generateObject - async function that may return streams
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.generateObject, {
Expand DownExpand Up@@ -190,6 +212,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // streamObject - sync function returning stream (v4+, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.streamObjectSync, {
 name: "streamObject",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // Agent.generate - async method
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.agentGenerate, {
Expand All@@ -210,7 +250,7 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // Agent.stream - async method returning stream
 // Agent.stream - async method returning stream (v5, used by wrapAISDK)
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.agentStream, {
 name: "Agent.stream",
Expand All@@ -236,6 +276,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // Agent.stream - sync method returning stream (v5, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.agentStreamSync, {
 name: "Agent.stream",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // ToolLoopAgent.generate - async method
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.toolLoopAgentGenerate, {
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5#1739

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to your account

 Merged

Stephen Belanger (Qard)
merged 4 commits into

from

Apr 7, 2026
 Merged


fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5
#1739
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43c72f2

fix(auto-instrumentation): Fix AI SDK streamText/streamObject and Age…


Qard Apr 4, 2026
8a97aa1

Fix up PR


lforst Apr 7, 2026
5fb8b52

Add e2e assertions


lforst Apr 7, 2026
bc5ba14

Merge branch 'main' into fix/ai-sdk-streaming-version-fixes


lforst Apr 7, 2026

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39 changes: 39 additions & 0 deletions
e2e/scenarios/ai-sdk-instrumentation/assertions.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -645,6 +645,7 @@ export function defineAISDKInstrumentationAssertions(options: {
 agentSpanName?: AgentSpanName;
 name: string;
 runScenario: RunAISDKScenario;
 sdkMajorVersion: number;
 snapshotName: string;
 supportsAttachmentScenario: boolean;
 supportsDenyOutputOverrideScenario: boolean;
Expand DownExpand Up@@ -894,6 +895,32 @@ export function defineAISDKInstrumentationAssertions(options: {
 });
 }

 if (options.sdkMajorVersion >= 4) {
 test(
 "captures sync streamText()/streamObject() paths in v4+",
 testConfig,
 () => {
 const root = findLatestSpan(events, ROOT_NAME);
 const streamTrace = findStreamTrace(events);

 expectOperationParentedByRoot(streamTrace.operation, root);
 expectAISDKParentSpan(streamTrace.parent);
 expect(operationName(streamTrace.operation)).toBe("stream");
 expect(streamTrace.parent?.span.name).toBe("streamText");

 if (options.supportsStreamObject) {
 const streamObjectTrace = findStreamObjectTrace(events);
 expectOperationParentedByRoot(streamObjectTrace.operation, root);
 expectAISDKParentSpan(streamObjectTrace.parent);
 expect(operationName(streamObjectTrace.operation)).toBe(
 "stream-object",
 );
 expect(streamObjectTrace.parent?.span.name).toBe("streamObject");
 }
 },
 );
 }

 if (options.agentSpanName) {
 test("captures trace for agent.generate()", testConfig, () => {
 const root = findLatestSpan(events, ROOT_NAME);
Expand DownExpand Up@@ -922,6 +949,18 @@ export function defineAISDKInstrumentationAssertions(options: {
 expect(trace.modelChildren.length).toBeGreaterThanOrEqual(1);
 expect(trace.latestChild?.output).toBeDefined();
 });

 if (options.sdkMajorVersion === 5 && options.agentSpanName === "Agent") {
 test("captures Agent.stream() path in v5", testConfig, () => {
 const root = findLatestSpan(events, ROOT_NAME);
 const trace = findAgentStreamTrace(events, "Agent");

 expectOperationParentedByRoot(trace.operation, root);
 expectAISDKParentSpan(trace.parent);
 expect(operationName(trace.operation)).toBe("agent-stream");
 expect(trace.parent?.span.name).toBe("Agent.stream");
 });
 }
 }

 if (options.supportsDenyOutputOverrideScenario) {
Expand Down

2 changes: 2 additions & 0 deletions
e2e/scenarios/ai-sdk-instrumentation/scenario.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -53,6 +53,7 @@ for (const scenario of aiSDKScenarios) {
 supportsOutputObjectScenario,
 supportsStreamObject: scenario.supportsStreamObject,
 supportsToolExecution: scenario.supportsToolExecution,
 sdkMajorVersion,
 testFileUrl: import.meta.url,
 timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
 });
Expand All@@ -76,6 +77,7 @@ for (const scenario of aiSDKScenarios) {
 supportsOutputObjectScenario,
 supportsStreamObject: scenario.supportsStreamObject,
 supportsToolExecution: scenario.supportsToolExecution,
 sdkMajorVersion,
 testFileUrl: import.meta.url,
 timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
 });
Expand Down

48 changes: 38 additions & 10 deletions
js/src/auto-instrumentations/configs/ai-sdk.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -39,19 +39,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // streamText - function returning stream
 // streamText - async function (v3 only, before the sync refactor in v4)
 {
 channelName: aiSDKChannels.streamText.channelName,
 module: {
 name: "ai",
 versionRange: ">=3.0.0",
 versionRange: ">=3.0.0 <4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamText",
 kind: "Async",
 },
 },

 // streamText - sync function returning stream (v4+)
 {
 channelName: aiSDKChannels.streamTextSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamText",
 kind: "Sync",
 },
 },
 {
 channelName: aiSDKChannels.streamText.channelName,
 module: {
Expand DownExpand Up@@ -91,19 +105,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // streamObject - function returning stream
 // streamObject - async function (v3 only, before the sync refactor in v4)
 {
 channelName: aiSDKChannels.streamObject.channelName,
 module: {
 name: "ai",
 versionRange: ">=3.0.0",
 versionRange: ">=3.0.0 <4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamObject",
 kind: "Async",
 },
 },

 // streamObject - sync function returning stream (v4+)
 {
 channelName: aiSDKChannels.streamObjectSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamObject",
 kind: "Sync",
 },
 },
 {
 channelName: aiSDKChannels.streamObject.channelName,
 module: {
Expand DownExpand Up@@ -147,32 +175,32 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // Agent.stream - async method (v5 only)
 // Agent.stream - sync method (v5 only)
 // The compiled AI SDK bundle emits this as an anonymous class method, so we
 // target the first async `stream` method in the file instead of a class name.
 // target the first sync `stream` method in the file instead of a class name.
 {
 channelName: aiSDKChannels.agentStream.channelName,
 channelName: aiSDKChannels.agentStreamSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=5.0.0 <6.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 methodName: "stream",
 kind: "Async",
 kind: "Sync",
 index: 0,
 },
 },
 {
 channelName: aiSDKChannels.agentStream.channelName,
 channelName: aiSDKChannels.agentStreamSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=5.0.0 <6.0.0",
 filePath: "dist/index.js",
 },
 functionQuery: {
 methodName: "stream",
 kind: "Async",
 kind: "Sync",
 index: 0,
 },
 },
Expand Down

27 changes: 27 additions & 0 deletions
js/src/instrumentation/plugins/ai-sdk-channels.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -33,6 +33,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "streamText",
 kind: "async",
 }),
 streamTextSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "streamText.sync",
 kind: "sync-stream",
 }),
 generateObject: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand All@@ -51,6 +60,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "streamObject",
 kind: "async",
 }),
 streamObjectSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "streamObject.sync",
 kind: "sync-stream",
 }),
 agentGenerate: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand All@@ -69,6 +87,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "Agent.stream",
 kind: "async",
 }),
 agentStreamSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "Agent.stream.sync",
 kind: "sync-stream",
 }),
 toolLoopAgentGenerate: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand Down

62 changes: 60 additions & 2 deletions
js/src/instrumentation/plugins/ai-sdk-plugin.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,5 +1,9 @@
import { BasePlugin } from "../core";
import { traceStreamingChannel, unsubscribeAll } from "../core/channel-tracing";
import {
 traceStreamingChannel,
 traceSyncStreamChannel,
 unsubscribeAll,
} from "../core/channel-tracing";
import { SpanTypeAttribute } from "../../../util/index";
import { getCurrentUnixTimestamp } from "../../util";
import { Attachment, type Span, withCurrent } from "../../logger";
Expand DownExpand Up@@ -144,6 +148,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // streamText - sync function returning stream (v4+, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.streamTextSync, {
 name: "streamText",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // generateObject - async function that may return streams
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.generateObject, {
Expand DownExpand Up@@ -190,6 +212,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // streamObject - sync function returning stream (v4+, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.streamObjectSync, {
 name: "streamObject",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // Agent.generate - async method
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.agentGenerate, {
Expand All@@ -210,7 +250,7 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // Agent.stream - async method returning stream
 // Agent.stream - async method returning stream (v5, used by wrapAISDK)
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.agentStream, {
 name: "Agent.stream",
Expand All@@ -236,6 +276,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // Agent.stream - sync method returning stream (v5, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.agentStreamSync, {
 name: "Agent.stream",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // ToolLoopAgent.generate - async method
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.toolLoopAgentGenerate, {
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5#1739

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to your account

 Merged

Stephen Belanger (Qard)
merged 4 commits into

from

Apr 7, 2026
 Merged


fix(auto-instrumentation): Fix AI SDK streaming version handling for v3/v4+/v5
#1739
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43c72f2

fix(auto-instrumentation): Fix AI SDK streamText/streamObject and Age…


Qard Apr 4, 2026
8a97aa1

Fix up PR


lforst Apr 7, 2026
5fb8b52

Add e2e assertions


lforst Apr 7, 2026
bc5ba14

Merge branch 'main' into fix/ai-sdk-streaming-version-fixes


lforst Apr 7, 2026

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39 changes: 39 additions & 0 deletions
e2e/scenarios/ai-sdk-instrumentation/assertions.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -645,6 +645,7 @@ export function defineAISDKInstrumentationAssertions(options: {
 agentSpanName?: AgentSpanName;
 name: string;
 runScenario: RunAISDKScenario;
 sdkMajorVersion: number;
 snapshotName: string;
 supportsAttachmentScenario: boolean;
 supportsDenyOutputOverrideScenario: boolean;
Expand DownExpand Up@@ -894,6 +895,32 @@ export function defineAISDKInstrumentationAssertions(options: {
 });
 }

 if (options.sdkMajorVersion >= 4) {
 test(
 "captures sync streamText()/streamObject() paths in v4+",
 testConfig,
 () => {
 const root = findLatestSpan(events, ROOT_NAME);
 const streamTrace = findStreamTrace(events);

 expectOperationParentedByRoot(streamTrace.operation, root);
 expectAISDKParentSpan(streamTrace.parent);
 expect(operationName(streamTrace.operation)).toBe("stream");
 expect(streamTrace.parent?.span.name).toBe("streamText");

 if (options.supportsStreamObject) {
 const streamObjectTrace = findStreamObjectTrace(events);
 expectOperationParentedByRoot(streamObjectTrace.operation, root);
 expectAISDKParentSpan(streamObjectTrace.parent);
 expect(operationName(streamObjectTrace.operation)).toBe(
 "stream-object",
 );
 expect(streamObjectTrace.parent?.span.name).toBe("streamObject");
 }
 },
 );
 }

 if (options.agentSpanName) {
 test("captures trace for agent.generate()", testConfig, () => {
 const root = findLatestSpan(events, ROOT_NAME);
Expand DownExpand Up@@ -922,6 +949,18 @@ export function defineAISDKInstrumentationAssertions(options: {
 expect(trace.modelChildren.length).toBeGreaterThanOrEqual(1);
 expect(trace.latestChild?.output).toBeDefined();
 });

 if (options.sdkMajorVersion === 5 && options.agentSpanName === "Agent") {
 test("captures Agent.stream() path in v5", testConfig, () => {
 const root = findLatestSpan(events, ROOT_NAME);
 const trace = findAgentStreamTrace(events, "Agent");

 expectOperationParentedByRoot(trace.operation, root);
 expectAISDKParentSpan(trace.parent);
 expect(operationName(trace.operation)).toBe("agent-stream");
 expect(trace.parent?.span.name).toBe("Agent.stream");
 });
 }
 }

 if (options.supportsDenyOutputOverrideScenario) {
Expand Down

2 changes: 2 additions & 0 deletions
e2e/scenarios/ai-sdk-instrumentation/scenario.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -53,6 +53,7 @@ for (const scenario of aiSDKScenarios) {
 supportsOutputObjectScenario,
 supportsStreamObject: scenario.supportsStreamObject,
 supportsToolExecution: scenario.supportsToolExecution,
 sdkMajorVersion,
 testFileUrl: import.meta.url,
 timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
 });
Expand All@@ -76,6 +77,7 @@ for (const scenario of aiSDKScenarios) {
 supportsOutputObjectScenario,
 supportsStreamObject: scenario.supportsStreamObject,
 supportsToolExecution: scenario.supportsToolExecution,
 sdkMajorVersion,
 testFileUrl: import.meta.url,
 timeoutMs: AI_SDK_SCENARIO_TIMEOUT_MS,
 });
Expand Down

48 changes: 38 additions & 10 deletions
js/src/auto-instrumentations/configs/ai-sdk.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -39,19 +39,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // streamText - function returning stream
 // streamText - async function (v3 only, before the sync refactor in v4)
 {
 channelName: aiSDKChannels.streamText.channelName,
 module: {
 name: "ai",
 versionRange: ">=3.0.0",
 versionRange: ">=3.0.0 <4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamText",
 kind: "Async",
 },
 },

 // streamText - sync function returning stream (v4+)
 {
 channelName: aiSDKChannels.streamTextSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamText",
 kind: "Sync",
 },
 },
 {
 channelName: aiSDKChannels.streamText.channelName,
 module: {
Expand DownExpand Up@@ -91,19 +105,33 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // streamObject - function returning stream
 // streamObject - async function (v3 only, before the sync refactor in v4)
 {
 channelName: aiSDKChannels.streamObject.channelName,
 module: {
 name: "ai",
 versionRange: ">=3.0.0",
 versionRange: ">=3.0.0 <4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamObject",
 kind: "Async",
 },
 },

 // streamObject - sync function returning stream (v4+)
 {
 channelName: aiSDKChannels.streamObjectSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=4.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 functionName: "streamObject",
 kind: "Sync",
 },
 },
 {
 channelName: aiSDKChannels.streamObject.channelName,
 module: {
Expand DownExpand Up@@ -147,32 +175,32 @@ export const aiSDKConfigs: InstrumentationConfig[] = [
 },
 },

 // Agent.stream - async method (v5 only)
 // Agent.stream - sync method (v5 only)
 // The compiled AI SDK bundle emits this as an anonymous class method, so we
 // target the first async `stream` method in the file instead of a class name.
 // target the first sync `stream` method in the file instead of a class name.
 {
 channelName: aiSDKChannels.agentStream.channelName,
 channelName: aiSDKChannels.agentStreamSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=5.0.0 <6.0.0",
 filePath: "dist/index.mjs",
 },
 functionQuery: {
 methodName: "stream",
 kind: "Async",
 kind: "Sync",
 index: 0,
 },
 },
 {
 channelName: aiSDKChannels.agentStream.channelName,
 channelName: aiSDKChannels.agentStreamSync.channelName,
 module: {
 name: "ai",
 versionRange: ">=5.0.0 <6.0.0",
 filePath: "dist/index.js",
 },
 functionQuery: {
 methodName: "stream",
 kind: "Async",
 kind: "Sync",
 index: 0,
 },
 },
Expand Down

27 changes: 27 additions & 0 deletions
js/src/instrumentation/plugins/ai-sdk-channels.ts

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -33,6 +33,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "streamText",
 kind: "async",
 }),
 streamTextSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "streamText.sync",
 kind: "sync-stream",
 }),
 generateObject: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand All@@ -51,6 +60,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "streamObject",
 kind: "async",
 }),
 streamObjectSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "streamObject.sync",
 kind: "sync-stream",
 }),
 agentGenerate: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand All@@ -69,6 +87,15 @@ export const aiSDKChannels = defineChannels("ai", {
 channelName: "Agent.stream",
 kind: "async",
 }),
 agentStreamSync: channel<
 [AISDKCallParams],
 AISDKResult,
 AISDKChannelContext,
 unknown
 >({
 channelName: "Agent.stream.sync",
 kind: "sync-stream",
 }),
 toolLoopAgentGenerate: channel<
 [AISDKCallParams],
 AISDKStreamResult,
Expand Down

62 changes: 60 additions & 2 deletions
js/src/instrumentation/plugins/ai-sdk-plugin.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,5 +1,9 @@
import { BasePlugin } from "../core";
import { traceStreamingChannel, unsubscribeAll } from "../core/channel-tracing";
import {
 traceStreamingChannel,
 traceSyncStreamChannel,
 unsubscribeAll,
} from "../core/channel-tracing";
import { SpanTypeAttribute } from "../../../util/index";
import { getCurrentUnixTimestamp } from "../../util";
import { Attachment, type Span, withCurrent } from "../../logger";
Expand DownExpand Up@@ -144,6 +148,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // streamText - sync function returning stream (v4+, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.streamTextSync, {
 name: "streamText",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // generateObject - async function that may return streams
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.generateObject, {
Expand DownExpand Up@@ -190,6 +212,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // streamObject - sync function returning stream (v4+, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.streamObjectSync, {
 name: "streamObject",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // Agent.generate - async method
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.agentGenerate, {
Expand All@@ -210,7 +250,7 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // Agent.stream - async method returning stream
 // Agent.stream - async method returning stream (v5, used by wrapAISDK)
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.agentStream, {
 name: "Agent.stream",
Expand All@@ -236,6 +276,24 @@ export class AISDKPlugin extends BasePlugin {
 }),
 );

 // Agent.stream - sync method returning stream (v5, used by auto-hook)
 this.unsubscribers.push(
 traceSyncStreamChannel(aiSDKChannels.agentStreamSync, {
 name: "Agent.stream",
 type: SpanTypeAttribute.LLM,
 extractInput: ([params], event, span) =>
 prepareAISDKInput(params, event, span, denyOutputPaths),
 patchResult: ({ endEvent, result, span, startTime }) =>
 patchAISDKStreamingResult({
 defaultDenyOutputPaths: denyOutputPaths,
 endEvent,
 result,
 span,
 startTime,
 }),
 }),
 );

 // ToolLoopAgent.generate - async method
 this.unsubscribers.push(
 traceStreamingChannel(aiSDKChannels.toolLoopAgentGenerate, {
Expand Down
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