fix: Give AI SDK top-level api spans type function - #1769

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Luca Forstner (lforst) merged 1 commit into
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lforst/ai-sdk-span-types
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fix: Give AI SDK top-level api spans type function#1769
Luca Forstner (lforst) merged 1 commit into
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lforst/ai-sdk-span-types

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@lforstLuca Forstner (lforst) commented Apr 9, 2026

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Ref: https://linear.app/braintrustdata/issue/BT-4717

Turns span type of top-level spans for ai sdk into function instead of llm to fix the product "double counting" the duration as LLM duration.

AbhiPrasad
Abhijeet Prasad (AbhiPrasad) approved these changes Apr 9, 2026
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Like you were saying, we probably need to write down the general rules for this somewhere. Even just a markdown in https://github.com/braintrustdata/braintrust-spec is a good start.

@lforst
Luca Forstner (lforst) merged commit 6214e89 into mainApr 9, 2026
49 checks passed
@lforst
Luca Forstner (lforst) deleted the lforst/ai-sdk-span-types branch April 9, 2026 18:18
@github-actionsgithub-actionsBot mentioned this pull request Apr 15, 2026
Merged
Luca Forstner (lforst) added a commit that referenced this pull request Apr 16, 2026
@github-actions@lforst
[ci] release (#1835)
6428774
This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and publish to npm
yourself or [setup this action to publish
automatically](https://github.com/changesets/action#with-publishing). If
you're not ready to do a release yet, that's fine, whenever you add more
changesets to main, this PR will be updated.
# Releases
## braintrust@3.9.0
### Minor Changes
-
[#1824](#1824)
[`c980e07`](c980e07)
Thanks [@lforst](https://github.com/lforst)! - feat: Add reranking
instrumentation for AI SDK and Openrouter SDK
-
[#1738](#1738)
[`25d25d5`](25d25d5)
Thanks [@AbhiPrasad](https://github.com/AbhiPrasad)! - - feat: Add
instrumentation for @huggingface/inference
([#1807](#1807))
- feat: Add cohere-ai instrumentation
([#1781](#1781))
- fix: Capture anthropic server tool use inputs for streaming APIs
([#1776](#1776))
- feat: Capture grounding metadata for Google GenAI
([#1773](#1773))
- fix(claude-agent-sdk): Don't drop tool spans for spawning subagents
([#1779](#1779))
- feat: Track server tool use metrics for anthropic SDK
([#1772](#1772))
- fix(openai): Collect logprob and refulsals output for streaming APIs
([#1774](#1774))
- perf: Remove zod from deepCopyEvent
([#1796](#1796))
- fix(test): Double timeout for slow OpenAI API tests
([#1794](#1794))
- feat(claude-agent-sdk): Improve task lifecycle and lifecycle details
([#1777](#1777))
- ci(deps): bump actions/github-script from 8.0.0 to 9.0.0
([#1783](#1783))
- ci(deps): bump docker/setup-buildx-action from 3.12.0 to 4.0.0
([#1782](#1782))
- chore: Don't use environment (ie. github deployments) for canary tests
([#1775](#1775))
- chore: Make dependabot less annoying
([#1778](#1778))
- fix(auto-instrumentation): Upgrade @apm-js-collab/code-transformer to
v0.12.0
([#1708](#1708))
- fix(auto-instrumentation): Use sync channel for AI SDK CJS
streamText/streamObject in v4+
([#1768](#1768))
- fix: Give AI SDK top-level api spans type function
([#1769](#1769))
-
[#1814](#1814)
[`d9b9923`](d9b9923)
Thanks [@lforst](https://github.com/lforst)! - - feat: Add per-input
trialCount support to Eval()
-
[#1821](#1821)
[`1b5de11`](1b5de11)
Thanks [@lforst](https://github.com/lforst)! - feat: Instrument Google
GenAI embedContent for text
### Patch Changes
-
[#1825](#1825)
[`f389036`](f389036)
Thanks [@lforst](https://github.com/lforst)! - fix(ai-sdk): Restore
prompt cache metrics
-
[#1813](#1813)
[`2434a0e`](2434a0e)
Thanks [@lforst](https://github.com/lforst)! - fix(openai-agents): End
child spans on trace end
-
[#1836](#1836)
[`5581357`](5581357)
Thanks [@stretpjc](https://github.com/stretpjc)! - feat: Add
x-bt-use-gateway header to allowed CORS headers
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Luca Forstner <luca.forstner@gmail.com>
@mattrossmanMatt Rossman (mattrossman) mentioned this pull request Apr 21, 2026
Merged
Matt Rossman (mattrossman) added a commit to supabase/supabase that referenced this pull request Apr 21, 2026
@mattrossman
chore(studio): bump braintrust 3.4.0 → 3.9.0 (#44729)
c0c6f70
Bumps braintrust from 3.4.0 to ~~3.7.1~~ 3.9.0
~~Notable fix: v3.7.0 preserves the returned promise in tracing channel
hooks, which should resolve incorrect duration reporting in the
dashboard (braintrustdata/braintrust-sdk-javascript#1617)~~
3.9.0 includes this fix for double counted durations
braintrustdata/braintrust-sdk-javascript#1769
See eval results in comment below, this fixes the issue where LLM
Duration was clocking in larger than total Duration.
<img width="2384" height="1548" alt="CleanShot 2026-04-21 at 09 27
36@2x"
src="https://github.com/user-attachments/assets/7ad5a75c-e3c4-44e1-98d8-ad4849049f7a"
/>
Closes AI-578
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Chores**
* Updated Braintrust dependency to version 3.9.0
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Sign up for freeto join this conversation on GitHub. Already have an account? Sign in to comment

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@lforst@AbhiPrasad
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
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})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
fix: Give AI SDK top-level api spans type function - #1769
Merged
Luca Forstner (lforst) merged 1 commit into
mainfrom 
lforst/ai-sdk-span-types
Apr 9, 2026
Merged
fix: Give AI SDK top-level api spans type function#1769
Luca Forstner (lforst) merged 1 commit into
mainfrom 
lforst/ai-sdk-span-types
Conversation
@lforst
@lforstLuca Forstner (lforst)
commented
Apr 9, 2026

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Ref: https://linear.app/braintrustdata/issue/BT-4717
Turns span type of top-level spans for ai sdk into function instead of llm to fix the product "double counting" the duration as LLM duration.
AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
approved these changes
Apr 9, 2026
View reviewed changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
left a comment


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Like you were saying, we probably need to write down the general rules for this somewhere. Even just a markdown in https://github.com/braintrustdata/braintrust-spec is a good start.
@lforst
Luca Forstner (lforst)
merged commit 6214e89
into
mainApr 9, 2026

49 checks passed

@lforst
Luca Forstner (lforst)
deleted the

lforst/ai-sdk-span-types

branch
April 9, 2026 18:18
@github-actionsgithub-actionsBot
mentioned this pull request
Apr 15, 2026
 Merged

Luca Forstner (lforst) added a commit
that referenced
this pull request
Apr 16, 2026
@github-actions@lforst
[ci] release (#1835)
6428774
This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and publish to npm
yourself or [setup this action to publish
automatically](https://github.com/changesets/action#with-publishing). If
you're not ready to do a release yet, that's fine, whenever you add more
changesets to main, this PR will be updated.
# Releases
## braintrust@3.9.0
### Minor Changes
-
[#1824](#1824)
[`c980e07`](c980e07)
Thanks [@lforst](https://github.com/lforst)! - feat: Add reranking
instrumentation for AI SDK and Openrouter SDK
-
[#1738](#1738)
[`25d25d5`](25d25d5)
Thanks [@AbhiPrasad](https://github.com/AbhiPrasad)! - - feat: Add
instrumentation for @huggingface/inference
([#1807](#1807))
- feat: Add cohere-ai instrumentation
([#1781](#1781))
- fix: Capture anthropic server tool use inputs for streaming APIs
([#1776](#1776))
- feat: Capture grounding metadata for Google GenAI
([#1773](#1773))
- fix(claude-agent-sdk): Don't drop tool spans for spawning subagents
([#1779](#1779))
- feat: Track server tool use metrics for anthropic SDK
([#1772](#1772))
- fix(openai): Collect logprob and refulsals output for streaming APIs
([#1774](#1774))
- perf: Remove zod from deepCopyEvent
([#1796](#1796))
- fix(test): Double timeout for slow OpenAI API tests
([#1794](#1794))
- feat(claude-agent-sdk): Improve task lifecycle and lifecycle details
([#1777](#1777))
- ci(deps): bump actions/github-script from 8.0.0 to 9.0.0
([#1783](#1783))
- ci(deps): bump docker/setup-buildx-action from 3.12.0 to 4.0.0
([#1782](#1782))
- chore: Don't use environment (ie. github deployments) for canary tests
([#1775](#1775))
- chore: Make dependabot less annoying
([#1778](#1778))
- fix(auto-instrumentation): Upgrade @apm-js-collab/code-transformer to
v0.12.0
([#1708](#1708))
- fix(auto-instrumentation): Use sync channel for AI SDK CJS
streamText/streamObject in v4+
([#1768](#1768))
- fix: Give AI SDK top-level api spans type function
([#1769](#1769))
-
[#1814](#1814)
[`d9b9923`](d9b9923)
Thanks [@lforst](https://github.com/lforst)! - - feat: Add per-input
trialCount support to Eval()
-
[#1821](#1821)
[`1b5de11`](1b5de11)
Thanks [@lforst](https://github.com/lforst)! - feat: Instrument Google
GenAI embedContent for text
### Patch Changes
-
[#1825](#1825)
[`f389036`](f389036)
Thanks [@lforst](https://github.com/lforst)! - fix(ai-sdk): Restore
prompt cache metrics
-
[#1813](#1813)
[`2434a0e`](2434a0e)
Thanks [@lforst](https://github.com/lforst)! - fix(openai-agents): End
child spans on trace end
-
[#1836](#1836)
[`5581357`](5581357)
Thanks [@stretpjc](https://github.com/stretpjc)! - feat: Add
x-bt-use-gateway header to allowed CORS headers
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Luca Forstner <luca.forstner@gmail.com>
@mattrossmanMatt Rossman (mattrossman)
mentioned this pull request
Apr 21, 2026
 Merged

Matt Rossman (mattrossman) added a commit
to supabase/supabase
that referenced
this pull request
Apr 21, 2026
@mattrossman
chore(studio): bump braintrust 3.4.0 → 3.9.0 (#44729)
c0c6f70
Bumps braintrust from 3.4.0 to ~~3.7.1~~ 3.9.0
~~Notable fix: v3.7.0 preserves the returned promise in tracing channel
hooks, which should resolve incorrect duration reporting in the
dashboard (braintrustdata/braintrust-sdk-javascript#1617)~~
3.9.0 includes this fix for double counted durations
braintrustdata/braintrust-sdk-javascript#1769
See eval results in comment below, this fixes the issue where LLM
Duration was clocking in larger than total Duration.
<img width="2384" height="1548" alt="CleanShot 2026-04-21 at 09 27
36@2x"
src="https://github.com/user-attachments/assets/7ad5a75c-e3c4-44e1-98d8-ad4849049f7a"
/>
Closes AI-578
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Chores**
* Updated Braintrust dependency to version 3.9.0
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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, '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");
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
fix: Give AI SDK top-level api spans type function - #1769
Merged
Luca Forstner (lforst) merged 1 commit into
mainfrom 
lforst/ai-sdk-span-types
Apr 9, 2026
Merged
fix: Give AI SDK top-level api spans type function#1769
Luca Forstner (lforst) merged 1 commit into
mainfrom 
lforst/ai-sdk-span-types
Conversation
@lforst
@lforstLuca Forstner (lforst)
commented
Apr 9, 2026

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Ref: https://linear.app/braintrustdata/issue/BT-4717
Turns span type of top-level spans for ai sdk into function instead of llm to fix the product "double counting" the duration as LLM duration.
AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
approved these changes
Apr 9, 2026
View reviewed changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
left a comment


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Like you were saying, we probably need to write down the general rules for this somewhere. Even just a markdown in https://github.com/braintrustdata/braintrust-spec is a good start.
@lforst
Luca Forstner (lforst)
merged commit 6214e89
into
mainApr 9, 2026

49 checks passed

@lforst
Luca Forstner (lforst)
deleted the

lforst/ai-sdk-span-types

branch
April 9, 2026 18:18
@github-actionsgithub-actionsBot
mentioned this pull request
Apr 15, 2026
 Merged

Luca Forstner (lforst) added a commit
that referenced
this pull request
Apr 16, 2026
@github-actions@lforst
[ci] release (#1835)
6428774
This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and publish to npm
yourself or [setup this action to publish
automatically](https://github.com/changesets/action#with-publishing). If
you're not ready to do a release yet, that's fine, whenever you add more
changesets to main, this PR will be updated.
# Releases
## braintrust@3.9.0
### Minor Changes
-
[#1824](#1824)
[`c980e07`](c980e07)
Thanks [@lforst](https://github.com/lforst)! - feat: Add reranking
instrumentation for AI SDK and Openrouter SDK
-
[#1738](#1738)
[`25d25d5`](25d25d5)
Thanks [@AbhiPrasad](https://github.com/AbhiPrasad)! - - feat: Add
instrumentation for @huggingface/inference
([#1807](#1807))
- feat: Add cohere-ai instrumentation
([#1781](#1781))
- fix: Capture anthropic server tool use inputs for streaming APIs
([#1776](#1776))
- feat: Capture grounding metadata for Google GenAI
([#1773](#1773))
- fix(claude-agent-sdk): Don't drop tool spans for spawning subagents
([#1779](#1779))
- feat: Track server tool use metrics for anthropic SDK
([#1772](#1772))
- fix(openai): Collect logprob and refulsals output for streaming APIs
([#1774](#1774))
- perf: Remove zod from deepCopyEvent
([#1796](#1796))
- fix(test): Double timeout for slow OpenAI API tests
([#1794](#1794))
- feat(claude-agent-sdk): Improve task lifecycle and lifecycle details
([#1777](#1777))
- ci(deps): bump actions/github-script from 8.0.0 to 9.0.0
([#1783](#1783))
- ci(deps): bump docker/setup-buildx-action from 3.12.0 to 4.0.0
([#1782](#1782))
- chore: Don't use environment (ie. github deployments) for canary tests
([#1775](#1775))
- chore: Make dependabot less annoying
([#1778](#1778))
- fix(auto-instrumentation): Upgrade @apm-js-collab/code-transformer to
v0.12.0
([#1708](#1708))
- fix(auto-instrumentation): Use sync channel for AI SDK CJS
streamText/streamObject in v4+
([#1768](#1768))
- fix: Give AI SDK top-level api spans type function
([#1769](#1769))
-
[#1814](#1814)
[`d9b9923`](d9b9923)
Thanks [@lforst](https://github.com/lforst)! - - feat: Add per-input
trialCount support to Eval()
-
[#1821](#1821)
[`1b5de11`](1b5de11)
Thanks [@lforst](https://github.com/lforst)! - feat: Instrument Google
GenAI embedContent for text
### Patch Changes
-
[#1825](#1825)
[`f389036`](f389036)
Thanks [@lforst](https://github.com/lforst)! - fix(ai-sdk): Restore
prompt cache metrics
-
[#1813](#1813)
[`2434a0e`](2434a0e)
Thanks [@lforst](https://github.com/lforst)! - fix(openai-agents): End
child spans on trace end
-
[#1836](#1836)
[`5581357`](5581357)
Thanks [@stretpjc](https://github.com/stretpjc)! - feat: Add
x-bt-use-gateway header to allowed CORS headers
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Luca Forstner <luca.forstner@gmail.com>
@mattrossmanMatt Rossman (mattrossman)
mentioned this pull request
Apr 21, 2026
 Merged

Matt Rossman (mattrossman) added a commit
to supabase/supabase
that referenced
this pull request
Apr 21, 2026
@mattrossman
chore(studio): bump braintrust 3.4.0 → 3.9.0 (#44729)
c0c6f70
Bumps braintrust from 3.4.0 to ~~3.7.1~~ 3.9.0
~~Notable fix: v3.7.0 preserves the returned promise in tracing channel
hooks, which should resolve incorrect duration reporting in the
dashboard (braintrustdata/braintrust-sdk-javascript#1617)~~
3.9.0 includes this fix for double counted durations
braintrustdata/braintrust-sdk-javascript#1769
See eval results in comment below, this fixes the issue where LLM
Duration was clocking in larger than total Duration.
<img width="2384" height="1548" alt="CleanShot 2026-04-21 at 09 27
36@2x"
src="https://github.com/user-attachments/assets/7ad5a75c-e3c4-44e1-98d8-ad4849049f7a"
/>
Closes AI-578
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Chores**
* Updated Braintrust dependency to version 3.9.0
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Sign up for freeto join this conversation on GitHub.
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@lforst@AbhiPrasad

, '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");
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try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
fix: Give AI SDK top-level api spans type function - #1769
Merged
Luca Forstner (lforst) merged 1 commit into
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lforst/ai-sdk-span-types
Apr 9, 2026
Merged
fix: Give AI SDK top-level api spans type function#1769
Luca Forstner (lforst) merged 1 commit into
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lforst/ai-sdk-span-types
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@lforst
@lforstLuca Forstner (lforst)
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Ref: https://linear.app/braintrustdata/issue/BT-4717
Turns span type of top-level spans for ai sdk into function instead of llm to fix the product "double counting" the duration as LLM duration.
AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
approved these changes
Apr 9, 2026
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Like you were saying, we probably need to write down the general rules for this somewhere. Even just a markdown in https://github.com/braintrustdata/braintrust-spec is a good start.
@lforst
Luca Forstner (lforst)
merged commit 6214e89
into
mainApr 9, 2026

49 checks passed

@lforst
Luca Forstner (lforst)
deleted the

lforst/ai-sdk-span-types

branch
April 9, 2026 18:18
@github-actionsgithub-actionsBot
mentioned this pull request
Apr 15, 2026
 Merged

Luca Forstner (lforst) added a commit
that referenced
this pull request
Apr 16, 2026
@github-actions@lforst
[ci] release (#1835)
6428774
This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and publish to npm
yourself or [setup this action to publish
automatically](https://github.com/changesets/action#with-publishing). If
you're not ready to do a release yet, that's fine, whenever you add more
changesets to main, this PR will be updated.
# Releases
## braintrust@3.9.0
### Minor Changes
-
[#1824](#1824)
[`c980e07`](c980e07)
Thanks [@lforst](https://github.com/lforst)! - feat: Add reranking
instrumentation for AI SDK and Openrouter SDK
-
[#1738](#1738)
[`25d25d5`](25d25d5)
Thanks [@AbhiPrasad](https://github.com/AbhiPrasad)! - - feat: Add
instrumentation for @huggingface/inference
([#1807](#1807))
- feat: Add cohere-ai instrumentation
([#1781](#1781))
- fix: Capture anthropic server tool use inputs for streaming APIs
([#1776](#1776))
- feat: Capture grounding metadata for Google GenAI
([#1773](#1773))
- fix(claude-agent-sdk): Don't drop tool spans for spawning subagents
([#1779](#1779))
- feat: Track server tool use metrics for anthropic SDK
([#1772](#1772))
- fix(openai): Collect logprob and refulsals output for streaming APIs
([#1774](#1774))
- perf: Remove zod from deepCopyEvent
([#1796](#1796))
- fix(test): Double timeout for slow OpenAI API tests
([#1794](#1794))
- feat(claude-agent-sdk): Improve task lifecycle and lifecycle details
([#1777](#1777))
- ci(deps): bump actions/github-script from 8.0.0 to 9.0.0
([#1783](#1783))
- ci(deps): bump docker/setup-buildx-action from 3.12.0 to 4.0.0
([#1782](#1782))
- chore: Don't use environment (ie. github deployments) for canary tests
([#1775](#1775))
- chore: Make dependabot less annoying
([#1778](#1778))
- fix(auto-instrumentation): Upgrade @apm-js-collab/code-transformer to
v0.12.0
([#1708](#1708))
- fix(auto-instrumentation): Use sync channel for AI SDK CJS
streamText/streamObject in v4+
([#1768](#1768))
- fix: Give AI SDK top-level api spans type function
([#1769](#1769))
-
[#1814](#1814)
[`d9b9923`](d9b9923)
Thanks [@lforst](https://github.com/lforst)! - - feat: Add per-input
trialCount support to Eval()
-
[#1821](#1821)
[`1b5de11`](1b5de11)
Thanks [@lforst](https://github.com/lforst)! - feat: Instrument Google
GenAI embedContent for text
### Patch Changes
-
[#1825](#1825)
[`f389036`](f389036)
Thanks [@lforst](https://github.com/lforst)! - fix(ai-sdk): Restore
prompt cache metrics
-
[#1813](#1813)
[`2434a0e`](2434a0e)
Thanks [@lforst](https://github.com/lforst)! - fix(openai-agents): End
child spans on trace end
-
[#1836](#1836)
[`5581357`](5581357)
Thanks [@stretpjc](https://github.com/stretpjc)! - feat: Add
x-bt-use-gateway header to allowed CORS headers
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Luca Forstner <luca.forstner@gmail.com>
@mattrossmanMatt Rossman (mattrossman)
mentioned this pull request
Apr 21, 2026
 Merged

Matt Rossman (mattrossman) added a commit
to supabase/supabase
that referenced
this pull request
Apr 21, 2026
@mattrossman
chore(studio): bump braintrust 3.4.0 → 3.9.0 (#44729)
c0c6f70
Bumps braintrust from 3.4.0 to ~~3.7.1~~ 3.9.0
~~Notable fix: v3.7.0 preserves the returned promise in tracing channel
hooks, which should resolve incorrect duration reporting in the
dashboard (braintrustdata/braintrust-sdk-javascript#1617)~~
3.9.0 includes this fix for double counted durations
braintrustdata/braintrust-sdk-javascript#1769
See eval results in comment below, this fixes the issue where LLM
Duration was clocking in larger than total Duration.
<img width="2384" height="1548" alt="CleanShot 2026-04-21 at 09 27
36@2x"
src="https://github.com/user-attachments/assets/7ad5a75c-e3c4-44e1-98d8-ad4849049f7a"
/>
Closes AI-578
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Chores**
* Updated Braintrust dependency to version 3.9.0
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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@lforst@AbhiPrasad

, '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" + '

Skip to content
fix: Give AI SDK top-level api spans type function - #1769
Merged
Luca Forstner (lforst) merged 1 commit into
mainfrom 
lforst/ai-sdk-span-types
Apr 9, 2026
Merged
fix: Give AI SDK top-level api spans type function#1769
Luca Forstner (lforst) merged 1 commit into
mainfrom 
lforst/ai-sdk-span-types
Conversation
@lforst
@lforstLuca Forstner (lforst)
commented
Apr 9, 2026

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Ref: https://linear.app/braintrustdata/issue/BT-4717
Turns span type of top-level spans for ai sdk into function instead of llm to fix the product "double counting" the duration as LLM duration.
AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
approved these changes
Apr 9, 2026
View reviewed changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
left a comment


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Like you were saying, we probably need to write down the general rules for this somewhere. Even just a markdown in https://github.com/braintrustdata/braintrust-spec is a good start.
@lforst
Luca Forstner (lforst)
merged commit 6214e89
into
mainApr 9, 2026

49 checks passed

@lforst
Luca Forstner (lforst)
deleted the

lforst/ai-sdk-span-types

branch
April 9, 2026 18:18
@github-actionsgithub-actionsBot
mentioned this pull request
Apr 15, 2026
 Merged

Luca Forstner (lforst) added a commit
that referenced
this pull request
Apr 16, 2026
@github-actions@lforst
[ci] release (#1835)
6428774
This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and publish to npm
yourself or [setup this action to publish
automatically](https://github.com/changesets/action#with-publishing). If
you're not ready to do a release yet, that's fine, whenever you add more
changesets to main, this PR will be updated.
# Releases
## braintrust@3.9.0
### Minor Changes
-
[#1824](#1824)
[`c980e07`](c980e07)
Thanks [@lforst](https://github.com/lforst)! - feat: Add reranking
instrumentation for AI SDK and Openrouter SDK
-
[#1738](#1738)
[`25d25d5`](25d25d5)
Thanks [@AbhiPrasad](https://github.com/AbhiPrasad)! - - feat: Add
instrumentation for @huggingface/inference
([#1807](#1807))
- feat: Add cohere-ai instrumentation
([#1781](#1781))
- fix: Capture anthropic server tool use inputs for streaming APIs
([#1776](#1776))
- feat: Capture grounding metadata for Google GenAI
([#1773](#1773))
- fix(claude-agent-sdk): Don't drop tool spans for spawning subagents
([#1779](#1779))
- feat: Track server tool use metrics for anthropic SDK
([#1772](#1772))
- fix(openai): Collect logprob and refulsals output for streaming APIs
([#1774](#1774))
- perf: Remove zod from deepCopyEvent
([#1796](#1796))
- fix(test): Double timeout for slow OpenAI API tests
([#1794](#1794))
- feat(claude-agent-sdk): Improve task lifecycle and lifecycle details
([#1777](#1777))
- ci(deps): bump actions/github-script from 8.0.0 to 9.0.0
([#1783](#1783))
- ci(deps): bump docker/setup-buildx-action from 3.12.0 to 4.0.0
([#1782](#1782))
- chore: Don't use environment (ie. github deployments) for canary tests
([#1775](#1775))
- chore: Make dependabot less annoying
([#1778](#1778))
- fix(auto-instrumentation): Upgrade @apm-js-collab/code-transformer to
v0.12.0
([#1708](#1708))
- fix(auto-instrumentation): Use sync channel for AI SDK CJS
streamText/streamObject in v4+
([#1768](#1768))
- fix: Give AI SDK top-level api spans type function
([#1769](#1769))
-
[#1814](#1814)
[`d9b9923`](d9b9923)
Thanks [@lforst](https://github.com/lforst)! - - feat: Add per-input
trialCount support to Eval()
-
[#1821](#1821)
[`1b5de11`](1b5de11)
Thanks [@lforst](https://github.com/lforst)! - feat: Instrument Google
GenAI embedContent for text
### Patch Changes
-
[#1825](#1825)
[`f389036`](f389036)
Thanks [@lforst](https://github.com/lforst)! - fix(ai-sdk): Restore
prompt cache metrics
-
[#1813](#1813)
[`2434a0e`](2434a0e)
Thanks [@lforst](https://github.com/lforst)! - fix(openai-agents): End
child spans on trace end
-
[#1836](#1836)
[`5581357`](5581357)
Thanks [@stretpjc](https://github.com/stretpjc)! - feat: Add
x-bt-use-gateway header to allowed CORS headers
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Luca Forstner <luca.forstner@gmail.com>
@mattrossmanMatt Rossman (mattrossman)
mentioned this pull request
Apr 21, 2026
 Merged

Matt Rossman (mattrossman) added a commit
to supabase/supabase
that referenced
this pull request
Apr 21, 2026
@mattrossman
chore(studio): bump braintrust 3.4.0 → 3.9.0 (#44729)
c0c6f70
Bumps braintrust from 3.4.0 to ~~3.7.1~~ 3.9.0
~~Notable fix: v3.7.0 preserves the returned promise in tracing channel
hooks, which should resolve incorrect duration reporting in the
dashboard (braintrustdata/braintrust-sdk-javascript#1617)~~
3.9.0 includes this fix for double counted durations
braintrustdata/braintrust-sdk-javascript#1769
See eval results in comment below, this fixes the issue where LLM
Duration was clocking in larger than total Duration.
<img width="2384" height="1548" alt="CleanShot 2026-04-21 at 09 27
36@2x"
src="https://github.com/user-attachments/assets/7ad5a75c-e3c4-44e1-98d8-ad4849049f7a"
/>
Closes AI-578
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Chores**
* Updated Braintrust dependency to version 3.9.0
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Sign up for freeto join this conversation on GitHub.
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@AbhiPrasadAbhijeet Prasad (AbhiPrasad)AbhiPrasad approved these changes

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2 participants

@lforst@AbhiPrasad

, '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: Give AI SDK top-level api spans type function - #1769
Merged
Luca Forstner (lforst) merged 1 commit into
mainfrom 
lforst/ai-sdk-span-types
Apr 9, 2026
Merged
fix: Give AI SDK top-level api spans type function#1769
Luca Forstner (lforst) merged 1 commit into
mainfrom 
lforst/ai-sdk-span-types
Conversation
@lforst
@lforstLuca Forstner (lforst)
commented
Apr 9, 2026

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Ref: https://linear.app/braintrustdata/issue/BT-4717
Turns span type of top-level spans for ai sdk into function instead of llm to fix the product "double counting" the duration as LLM duration.
AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
approved these changes
Apr 9, 2026
View reviewed changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
left a comment


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Like you were saying, we probably need to write down the general rules for this somewhere. Even just a markdown in https://github.com/braintrustdata/braintrust-spec is a good start.
@lforst
Luca Forstner (lforst)
merged commit 6214e89
into
mainApr 9, 2026

49 checks passed

@lforst
Luca Forstner (lforst)
deleted the

lforst/ai-sdk-span-types

branch
April 9, 2026 18:18
@github-actionsgithub-actionsBot
mentioned this pull request
Apr 15, 2026
 Merged

Luca Forstner (lforst) added a commit
that referenced
this pull request
Apr 16, 2026
@github-actions@lforst
[ci] release (#1835)
6428774
This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and publish to npm
yourself or [setup this action to publish
automatically](https://github.com/changesets/action#with-publishing). If
you're not ready to do a release yet, that's fine, whenever you add more
changesets to main, this PR will be updated.
# Releases
## braintrust@3.9.0
### Minor Changes
-
[#1824](#1824)
[`c980e07`](c980e07)
Thanks [@lforst](https://github.com/lforst)! - feat: Add reranking
instrumentation for AI SDK and Openrouter SDK
-
[#1738](#1738)
[`25d25d5`](25d25d5)
Thanks [@AbhiPrasad](https://github.com/AbhiPrasad)! - - feat: Add
instrumentation for @huggingface/inference
([#1807](#1807))
- feat: Add cohere-ai instrumentation
([#1781](#1781))
- fix: Capture anthropic server tool use inputs for streaming APIs
([#1776](#1776))
- feat: Capture grounding metadata for Google GenAI
([#1773](#1773))
- fix(claude-agent-sdk): Don't drop tool spans for spawning subagents
([#1779](#1779))
- feat: Track server tool use metrics for anthropic SDK
([#1772](#1772))
- fix(openai): Collect logprob and refulsals output for streaming APIs
([#1774](#1774))
- perf: Remove zod from deepCopyEvent
([#1796](#1796))
- fix(test): Double timeout for slow OpenAI API tests
([#1794](#1794))
- feat(claude-agent-sdk): Improve task lifecycle and lifecycle details
([#1777](#1777))
- ci(deps): bump actions/github-script from 8.0.0 to 9.0.0
([#1783](#1783))
- ci(deps): bump docker/setup-buildx-action from 3.12.0 to 4.0.0
([#1782](#1782))
- chore: Don't use environment (ie. github deployments) for canary tests
([#1775](#1775))
- chore: Make dependabot less annoying
([#1778](#1778))
- fix(auto-instrumentation): Upgrade @apm-js-collab/code-transformer to
v0.12.0
([#1708](#1708))
- fix(auto-instrumentation): Use sync channel for AI SDK CJS
streamText/streamObject in v4+
([#1768](#1768))
- fix: Give AI SDK top-level api spans type function
([#1769](#1769))
-
[#1814](#1814)
[`d9b9923`](d9b9923)
Thanks [@lforst](https://github.com/lforst)! - - feat: Add per-input
trialCount support to Eval()
-
[#1821](#1821)
[`1b5de11`](1b5de11)
Thanks [@lforst](https://github.com/lforst)! - feat: Instrument Google
GenAI embedContent for text
### Patch Changes
-
[#1825](#1825)
[`f389036`](f389036)
Thanks [@lforst](https://github.com/lforst)! - fix(ai-sdk): Restore
prompt cache metrics
-
[#1813](#1813)
[`2434a0e`](2434a0e)
Thanks [@lforst](https://github.com/lforst)! - fix(openai-agents): End
child spans on trace end
-
[#1836](#1836)
[`5581357`](5581357)
Thanks [@stretpjc](https://github.com/stretpjc)! - feat: Add
x-bt-use-gateway header to allowed CORS headers
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Luca Forstner <luca.forstner@gmail.com>
@mattrossmanMatt Rossman (mattrossman)
mentioned this pull request
Apr 21, 2026
 Merged

Matt Rossman (mattrossman) added a commit
to supabase/supabase
that referenced
this pull request
Apr 21, 2026
@mattrossman
chore(studio): bump braintrust 3.4.0 → 3.9.0 (#44729)
c0c6f70
Bumps braintrust from 3.4.0 to ~~3.7.1~~ 3.9.0
~~Notable fix: v3.7.0 preserves the returned promise in tracing channel
hooks, which should resolve incorrect duration reporting in the
dashboard (braintrustdata/braintrust-sdk-javascript#1617)~~
3.9.0 includes this fix for double counted durations
braintrustdata/braintrust-sdk-javascript#1769
See eval results in comment below, this fixes the issue where LLM
Duration was clocking in larger than total Duration.
<img width="2384" height="1548" alt="CleanShot 2026-04-21 at 09 27
36@2x"
src="https://github.com/user-attachments/assets/7ad5a75c-e3c4-44e1-98d8-ad4849049f7a"
/>
Closes AI-578
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Chores**
* Updated Braintrust dependency to version 3.9.0
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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@AbhiPrasadAbhijeet Prasad (AbhiPrasad)AbhiPrasad approved these changes

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2 participants

@lforst@AbhiPrasad

, '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('^' + ".*" + '

Skip to content
fix: Give AI SDK top-level api spans type function - #1769
Merged
Luca Forstner (lforst) merged 1 commit into
mainfrom 
lforst/ai-sdk-span-types
Apr 9, 2026
Merged
fix: Give AI SDK top-level api spans type function#1769
Luca Forstner (lforst) merged 1 commit into
mainfrom 
lforst/ai-sdk-span-types
Conversation
@lforst
@lforstLuca Forstner (lforst)
commented
Apr 9, 2026

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Ref: https://linear.app/braintrustdata/issue/BT-4717
Turns span type of top-level spans for ai sdk into function instead of llm to fix the product "double counting" the duration as LLM duration.
AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
approved these changes
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Like you were saying, we probably need to write down the general rules for this somewhere. Even just a markdown in https://github.com/braintrustdata/braintrust-spec is a good start.
@lforst
Luca Forstner (lforst)
merged commit 6214e89
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@github-actionsgithub-actionsBot
mentioned this pull request
Apr 15, 2026
 Merged

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that referenced
this pull request
Apr 16, 2026
@github-actions@lforst
[ci] release (#1835)
6428774
This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and publish to npm
yourself or [setup this action to publish
automatically](https://github.com/changesets/action#with-publishing). If
you're not ready to do a release yet, that's fine, whenever you add more
changesets to main, this PR will be updated.
# Releases
## braintrust@3.9.0
### Minor Changes
-
[#1824](#1824)
[`c980e07`](c980e07)
Thanks [@lforst](https://github.com/lforst)! - feat: Add reranking
instrumentation for AI SDK and Openrouter SDK
-
[#1738](#1738)
[`25d25d5`](25d25d5)
Thanks [@AbhiPrasad](https://github.com/AbhiPrasad)! - - feat: Add
instrumentation for @huggingface/inference
([#1807](#1807))
- feat: Add cohere-ai instrumentation
([#1781](#1781))
- fix: Capture anthropic server tool use inputs for streaming APIs
([#1776](#1776))
- feat: Capture grounding metadata for Google GenAI
([#1773](#1773))
- fix(claude-agent-sdk): Don't drop tool spans for spawning subagents
([#1779](#1779))
- feat: Track server tool use metrics for anthropic SDK
([#1772](#1772))
- fix(openai): Collect logprob and refulsals output for streaming APIs
([#1774](#1774))
- perf: Remove zod from deepCopyEvent
([#1796](#1796))
- fix(test): Double timeout for slow OpenAI API tests
([#1794](#1794))
- feat(claude-agent-sdk): Improve task lifecycle and lifecycle details
([#1777](#1777))
- ci(deps): bump actions/github-script from 8.0.0 to 9.0.0
([#1783](#1783))
- ci(deps): bump docker/setup-buildx-action from 3.12.0 to 4.0.0
([#1782](#1782))
- chore: Don't use environment (ie. github deployments) for canary tests
([#1775](#1775))
- chore: Make dependabot less annoying
([#1778](#1778))
- fix(auto-instrumentation): Upgrade @apm-js-collab/code-transformer to
v0.12.0
([#1708](#1708))
- fix(auto-instrumentation): Use sync channel for AI SDK CJS
streamText/streamObject in v4+
([#1768](#1768))
- fix: Give AI SDK top-level api spans type function
([#1769](#1769))
-
[#1814](#1814)
[`d9b9923`](d9b9923)
Thanks [@lforst](https://github.com/lforst)! - - feat: Add per-input
trialCount support to Eval()
-
[#1821](#1821)
[`1b5de11`](1b5de11)
Thanks [@lforst](https://github.com/lforst)! - feat: Instrument Google
GenAI embedContent for text
### Patch Changes
-
[#1825](#1825)
[`f389036`](f389036)
Thanks [@lforst](https://github.com/lforst)! - fix(ai-sdk): Restore
prompt cache metrics
-
[#1813](#1813)
[`2434a0e`](2434a0e)
Thanks [@lforst](https://github.com/lforst)! - fix(openai-agents): End
child spans on trace end
-
[#1836](#1836)
[`5581357`](5581357)
Thanks [@stretpjc](https://github.com/stretpjc)! - feat: Add
x-bt-use-gateway header to allowed CORS headers
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Luca Forstner <luca.forstner@gmail.com>
@mattrossmanMatt Rossman (mattrossman)
mentioned this pull request
Apr 21, 2026
 Merged

Matt Rossman (mattrossman) added a commit
to supabase/supabase
that referenced
this pull request
Apr 21, 2026
@mattrossman
chore(studio): bump braintrust 3.4.0 → 3.9.0 (#44729)
c0c6f70
Bumps braintrust from 3.4.0 to ~~3.7.1~~ 3.9.0
~~Notable fix: v3.7.0 preserves the returned promise in tracing channel
hooks, which should resolve incorrect duration reporting in the
dashboard (braintrustdata/braintrust-sdk-javascript#1617)~~
3.9.0 includes this fix for double counted durations
braintrustdata/braintrust-sdk-javascript#1769
See eval results in comment below, this fixes the issue where LLM
Duration was clocking in larger than total Duration.
<img width="2384" height="1548" alt="CleanShot 2026-04-21 at 09 27
36@2x"
src="https://github.com/user-attachments/assets/7ad5a75c-e3c4-44e1-98d8-ad4849049f7a"
/>
Closes AI-578
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Chores**
* Updated Braintrust dependency to version 3.9.0
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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, 'i');
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fix: Give AI SDK top-level api spans type function - #1769
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fix: Give AI SDK top-level api spans type function#1769
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@lforstLuca Forstner (lforst)
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Ref: https://linear.app/braintrustdata/issue/BT-4717
Turns span type of top-level spans for ai sdk into function instead of llm to fix the product "double counting" the duration as LLM duration.
AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
approved these changes
Apr 9, 2026
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Like you were saying, we probably need to write down the general rules for this somewhere. Even just a markdown in https://github.com/braintrustdata/braintrust-spec is a good start.
@lforst
Luca Forstner (lforst)
merged commit 6214e89
into
mainApr 9, 2026

49 checks passed

@lforst
Luca Forstner (lforst)
deleted the

lforst/ai-sdk-span-types

branch
April 9, 2026 18:18
@github-actionsgithub-actionsBot
mentioned this pull request
Apr 15, 2026
 Merged

Luca Forstner (lforst) added a commit
that referenced
this pull request
Apr 16, 2026
@github-actions@lforst
[ci] release (#1835)
6428774
This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and publish to npm
yourself or [setup this action to publish
automatically](https://github.com/changesets/action#with-publishing). If
you're not ready to do a release yet, that's fine, whenever you add more
changesets to main, this PR will be updated.
# Releases
## braintrust@3.9.0
### Minor Changes
-
[#1824](#1824)
[`c980e07`](c980e07)
Thanks [@lforst](https://github.com/lforst)! - feat: Add reranking
instrumentation for AI SDK and Openrouter SDK
-
[#1738](#1738)
[`25d25d5`](25d25d5)
Thanks [@AbhiPrasad](https://github.com/AbhiPrasad)! - - feat: Add
instrumentation for @huggingface/inference
([#1807](#1807))
- feat: Add cohere-ai instrumentation
([#1781](#1781))
- fix: Capture anthropic server tool use inputs for streaming APIs
([#1776](#1776))
- feat: Capture grounding metadata for Google GenAI
([#1773](#1773))
- fix(claude-agent-sdk): Don't drop tool spans for spawning subagents
([#1779](#1779))
- feat: Track server tool use metrics for anthropic SDK
([#1772](#1772))
- fix(openai): Collect logprob and refulsals output for streaming APIs
([#1774](#1774))
- perf: Remove zod from deepCopyEvent
([#1796](#1796))
- fix(test): Double timeout for slow OpenAI API tests
([#1794](#1794))
- feat(claude-agent-sdk): Improve task lifecycle and lifecycle details
([#1777](#1777))
- ci(deps): bump actions/github-script from 8.0.0 to 9.0.0
([#1783](#1783))
- ci(deps): bump docker/setup-buildx-action from 3.12.0 to 4.0.0
([#1782](#1782))
- chore: Don't use environment (ie. github deployments) for canary tests
([#1775](#1775))
- chore: Make dependabot less annoying
([#1778](#1778))
- fix(auto-instrumentation): Upgrade @apm-js-collab/code-transformer to
v0.12.0
([#1708](#1708))
- fix(auto-instrumentation): Use sync channel for AI SDK CJS
streamText/streamObject in v4+
([#1768](#1768))
- fix: Give AI SDK top-level api spans type function
([#1769](#1769))
-
[#1814](#1814)
[`d9b9923`](d9b9923)
Thanks [@lforst](https://github.com/lforst)! - - feat: Add per-input
trialCount support to Eval()
-
[#1821](#1821)
[`1b5de11`](1b5de11)
Thanks [@lforst](https://github.com/lforst)! - feat: Instrument Google
GenAI embedContent for text
### Patch Changes
-
[#1825](#1825)
[`f389036`](f389036)
Thanks [@lforst](https://github.com/lforst)! - fix(ai-sdk): Restore
prompt cache metrics
-
[#1813](#1813)
[`2434a0e`](2434a0e)
Thanks [@lforst](https://github.com/lforst)! - fix(openai-agents): End
child spans on trace end
-
[#1836](#1836)
[`5581357`](5581357)
Thanks [@stretpjc](https://github.com/stretpjc)! - feat: Add
x-bt-use-gateway header to allowed CORS headers
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Luca Forstner <luca.forstner@gmail.com>
@mattrossmanMatt Rossman (mattrossman)
mentioned this pull request
Apr 21, 2026
 Merged

Matt Rossman (mattrossman) added a commit
to supabase/supabase
that referenced
this pull request
Apr 21, 2026
@mattrossman
chore(studio): bump braintrust 3.4.0 → 3.9.0 (#44729)
c0c6f70
Bumps braintrust from 3.4.0 to ~~3.7.1~~ 3.9.0
~~Notable fix: v3.7.0 preserves the returned promise in tracing channel
hooks, which should resolve incorrect duration reporting in the
dashboard (braintrustdata/braintrust-sdk-javascript#1617)~~
3.9.0 includes this fix for double counted durations
braintrustdata/braintrust-sdk-javascript#1769
See eval results in comment below, this fixes the issue where LLM
Duration was clocking in larger than total Duration.
<img width="2384" height="1548" alt="CleanShot 2026-04-21 at 09 27
36@2x"
src="https://github.com/user-attachments/assets/7ad5a75c-e3c4-44e1-98d8-ad4849049f7a"
/>
Closes AI-578
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Chores**
* Updated Braintrust dependency to version 3.9.0
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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@lforst@AbhiPrasad