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fix: CachedSpanFetcher no longer caches empty results permanently - #79

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Abhijeet Prasad (AbhiPrasad) merged 3 commits into
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curtis/cached_span_fetcher_fix
Apr 14, 2026
Merged

fix: CachedSpanFetcher no longer caches empty results permanently#79
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom
curtis/cached_span_fetcher_fix

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@cjgalione

@cjgalioneCurtis Galione (cjgalione) commented Mar 13, 2026

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Summary

  • CachedSpanFetcher.get_spans() was setting _all_fetched = True even when the fetch returned no spans, permanently caching the empty result and preventing future re-fetches
  • Now only marks as fully fetched when the cache is non-empty, so subsequent calls will retry and pick up spans once they become available

Test plan

  • Updated test_handle_empty_results to verify re-fetch occurs when first call returned empty
  • Added test_empty_then_populated_refetches to confirm spans are returned on retry
  • Added test_empty_results_with_type_filter to confirm type-filtered path also handles empty results
  • Verified existing caching tests still pass (non-empty fetches are still cached)

AbhiPrasad
Abhijeet Prasad (AbhiPrasad) previously approved these changes Mar 16, 2026
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If there are a bunch of scorers running, this will mean that get_spans will keep hitting the network, but I guess that is fine.

Comment threadpy/src/braintrust/test_trace.py
assert result[0].span_id == "span-1"

@pytest.mark.asyncio
async def test_empty_then_populated_refetches(self):

@AbhiPrasadAbhijeet Prasad (AbhiPrasad)Mar 16, 2026

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This is pretty similar to test_handle_empty_results. Can we consolidate?

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad) dismissed their stale reviewMarch 16, 2026 22:27

Removing the approve because of slack convo. Trace scorers should always return results here.

CLowbrow
Alex Z (CLowbrow) approved these changes Apr 6, 2026
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seems fine but Abhijeet Prasad (@AbhiPrasad) should approve as well.

@AbhiPrasad

Abhijeet Prasad (AbhiPrasad) commented Apr 6, 2026

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You'll need to rebase to be able to merge, we changed CI to be required to checks-passed, and that was a job introduced in a later commit to the HEAD of this PR branch.

@AbhiPrasad

Abhijeet Prasad (AbhiPrasad) commented Apr 14, 2026

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I pushed up some changes to get this in a good state. Will merge in!

@AbhiPrasadAbhijeet Prasad (AbhiPrasad) mentioned this pull request Apr 14, 2026
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@AbhiPrasad
Abhijeet Prasad (AbhiPrasad) merged commit 785ed2b into mainApr 14, 2026
64 checks passed
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad) deleted the curtis/cached_span_fetcher_fix branch April 14, 2026 16:01
Abhijeet Prasad (AbhiPrasad) added a commit that referenced this pull request Apr 14, 2026
@AbhiPrasad
chore: bump to 0.15.0 (#277)
d258198
Includes:
- #247
- #258
- #255
- #253
- #252
- #261
- #265
- #264
- #267
- #268
- #270
- #271
- #275
- #274
- #79
Maybe Includes:
- #276
@AbhiPrasad

Abhijeet Prasad (AbhiPrasad) commented Apr 14, 2026

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released with https://github.com/braintrustdata/braintrust-sdk-python/releases/tag/py-sdk-v0.15.0

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@CLowbrowAlex Z (CLowbrow)CLowbrow approved these changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)AbhiPrasad approved these changes

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@cjgalione@AbhiPrasad@CLowbrow
, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
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function addCopyButtons() {
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observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
fix: CachedSpanFetcher no longer caches empty results permanently by cjgalione · Pull Request #79 · braintrustdata/braintrust-sdk-python · GitHub
Skip to content
fix: CachedSpanFetcher no longer caches empty results permanently - #79
Merged
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom 
curtis/cached_span_fetcher_fix
Apr 14, 2026
Merged
fix: CachedSpanFetcher no longer caches empty results permanently#79
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom 
curtis/cached_span_fetcher_fix
Conversation
@cjgalione
@cjgalioneCurtis Galione (cjgalione)
commented
Mar 13, 2026

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Summary
  • CachedSpanFetcher.get_spans() was setting _all_fetched = True even when the fetch returned no spans, permanently caching the empty result and preventing future re-fetches
  • Now only marks as fully fetched when the cache is non-empty, so subsequent calls will retry and pick up spans once they become available
Test plan
  • Updated test_handle_empty_results to verify re-fetch occurs when first call returned empty
  • Added test_empty_then_populated_refetches to confirm spans are returned on retry
  • Added test_empty_results_with_type_filter to confirm type-filtered path also handles empty results
  • Verified existing caching tests still pass (non-empty fetches are still cached)
AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
previously approved these changes
Mar 16, 2026
View reviewed changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
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If there are a bunch of scorers running, this will mean that get_spans will keep hitting the network, but I guess that is fine.
Comment threadpy/src/braintrust/test_trace.py
 assert result[0].span_id == "span-1"

 @pytest.mark.asyncio
 async def test_empty_then_populated_refetches(self):
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)Mar 16, 2026

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This is pretty similar to test_handle_empty_results. Can we consolidate?
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
dismissed
their stale reviewMarch 16, 2026 22:27
Removing the approve because of slack convo. Trace scorers should always return results here.
CLowbrow
Alex Z (CLowbrow)
approved these changes
Apr 6, 2026
View reviewed changes
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seems fine but Abhijeet Prasad (@AbhiPrasad) should approve as well.
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 6, 2026

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You'll need to rebase to be able to merge, we changed CI to be required to checks-passed, and that was a job introduced in a later commit to the HEAD of this PR branch.
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 14, 2026

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I pushed up some changes to get this in a good state. Will merge in!
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
mentioned this pull request
Apr 14, 2026
 Merged

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
merged commit 785ed2b
into
mainApr 14, 2026

64 checks passed

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
deleted the

curtis/cached_span_fetcher_fix

branch
April 14, 2026 16:01
Abhijeet Prasad (AbhiPrasad) added a commit
that referenced
this pull request
Apr 14, 2026
@AbhiPrasad
chore: bump to 0.15.0 (#277)
d258198
Includes:
- #247
- #258
- #255
- #253
- #252
- #261
- #265
- #264
- #267
- #268
- #270
- #271
- #275
- #274
- #79
Maybe Includes:
- #276
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 14, 2026

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released with https://github.com/braintrustdata/braintrust-sdk-python/releases/tag/py-sdk-v0.15.0
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@cjgalione@AbhiPrasad@CLowbrow

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
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color-scheme: dark light;
}
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var __re = new RegExp('^' + ".*" + '
fix: CachedSpanFetcher no longer caches empty results permanently by cjgalione · Pull Request #79 · braintrustdata/braintrust-sdk-python · GitHub
Skip to content
fix: CachedSpanFetcher no longer caches empty results permanently - #79
Merged
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom 
curtis/cached_span_fetcher_fix
Apr 14, 2026
Merged
fix: CachedSpanFetcher no longer caches empty results permanently#79
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom 
curtis/cached_span_fetcher_fix
Conversation
@cjgalione
@cjgalioneCurtis Galione (cjgalione)
commented
Mar 13, 2026

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Contributor
Summary
  • CachedSpanFetcher.get_spans() was setting _all_fetched = True even when the fetch returned no spans, permanently caching the empty result and preventing future re-fetches
  • Now only marks as fully fetched when the cache is non-empty, so subsequent calls will retry and pick up spans once they become available
Test plan
  • Updated test_handle_empty_results to verify re-fetch occurs when first call returned empty
  • Added test_empty_then_populated_refetches to confirm spans are returned on retry
  • Added test_empty_results_with_type_filter to confirm type-filtered path also handles empty results
  • Verified existing caching tests still pass (non-empty fetches are still cached)
AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
previously approved these changes
Mar 16, 2026
View reviewed changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
left a comment


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If there are a bunch of scorers running, this will mean that get_spans will keep hitting the network, but I guess that is fine.
Comment threadpy/src/braintrust/test_trace.py
 assert result[0].span_id == "span-1"

 @pytest.mark.asyncio
 async def test_empty_then_populated_refetches(self):
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)Mar 16, 2026

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This is pretty similar to test_handle_empty_results. Can we consolidate?
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
dismissed
their stale reviewMarch 16, 2026 22:27
Removing the approve because of slack convo. Trace scorers should always return results here.
CLowbrow
Alex Z (CLowbrow)
approved these changes
Apr 6, 2026
View reviewed changes
@CLowbrowAlex Z (CLowbrow)
left a comment


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seems fine but Abhijeet Prasad (@AbhiPrasad) should approve as well.
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 6, 2026

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You'll need to rebase to be able to merge, we changed CI to be required to checks-passed, and that was a job introduced in a later commit to the HEAD of this PR branch.
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 14, 2026

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I pushed up some changes to get this in a good state. Will merge in!
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
mentioned this pull request
Apr 14, 2026
 Merged

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
merged commit 785ed2b
into
mainApr 14, 2026

64 checks passed

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
deleted the

curtis/cached_span_fetcher_fix

branch
April 14, 2026 16:01
Abhijeet Prasad (AbhiPrasad) added a commit
that referenced
this pull request
Apr 14, 2026
@AbhiPrasad
chore: bump to 0.15.0 (#277)
d258198
Includes:
- #247
- #258
- #255
- #253
- #252
- #261
- #265
- #264
- #267
- #268
- #270
- #271
- #275
- #274
- #79
Maybe Includes:
- #276
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 14, 2026

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released with https://github.com/braintrustdata/braintrust-sdk-python/releases/tag/py-sdk-v0.15.0
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@CLowbrowAlex Z (CLowbrow)CLowbrow approved these changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)AbhiPrasad approved these changes

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@cjgalione@AbhiPrasad@CLowbrow

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
fix: CachedSpanFetcher no longer caches empty results permanently by cjgalione · Pull Request #79 · braintrustdata/braintrust-sdk-python · GitHub
Skip to content
fix: CachedSpanFetcher no longer caches empty results permanently - #79
Merged
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom 
curtis/cached_span_fetcher_fix
Apr 14, 2026
Merged
fix: CachedSpanFetcher no longer caches empty results permanently#79
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom 
curtis/cached_span_fetcher_fix
Conversation
@cjgalione
@cjgalioneCurtis Galione (cjgalione)
commented
Mar 13, 2026

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Contributor
Summary
  • CachedSpanFetcher.get_spans() was setting _all_fetched = True even when the fetch returned no spans, permanently caching the empty result and preventing future re-fetches
  • Now only marks as fully fetched when the cache is non-empty, so subsequent calls will retry and pick up spans once they become available
Test plan
  • Updated test_handle_empty_results to verify re-fetch occurs when first call returned empty
  • Added test_empty_then_populated_refetches to confirm spans are returned on retry
  • Added test_empty_results_with_type_filter to confirm type-filtered path also handles empty results
  • Verified existing caching tests still pass (non-empty fetches are still cached)
AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
previously approved these changes
Mar 16, 2026
View reviewed changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
left a comment


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If there are a bunch of scorers running, this will mean that get_spans will keep hitting the network, but I guess that is fine.
Comment threadpy/src/braintrust/test_trace.py
 assert result[0].span_id == "span-1"

 @pytest.mark.asyncio
 async def test_empty_then_populated_refetches(self):
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)Mar 16, 2026

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This is pretty similar to test_handle_empty_results. Can we consolidate?
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
dismissed
their stale reviewMarch 16, 2026 22:27
Removing the approve because of slack convo. Trace scorers should always return results here.
CLowbrow
Alex Z (CLowbrow)
approved these changes
Apr 6, 2026
View reviewed changes
@CLowbrowAlex Z (CLowbrow)
left a comment


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seems fine but Abhijeet Prasad (@AbhiPrasad) should approve as well.
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 6, 2026

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You'll need to rebase to be able to merge, we changed CI to be required to checks-passed, and that was a job introduced in a later commit to the HEAD of this PR branch.
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 14, 2026

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I pushed up some changes to get this in a good state. Will merge in!
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
mentioned this pull request
Apr 14, 2026
 Merged

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
merged commit 785ed2b
into
mainApr 14, 2026

64 checks passed

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
deleted the

curtis/cached_span_fetcher_fix

branch
April 14, 2026 16:01
Abhijeet Prasad (AbhiPrasad) added a commit
that referenced
this pull request
Apr 14, 2026
@AbhiPrasad
chore: bump to 0.15.0 (#277)
d258198
Includes:
- #247
- #258
- #255
- #253
- #252
- #261
- #265
- #264
- #267
- #268
- #270
- #271
- #275
- #274
- #79
Maybe Includes:
- #276
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 14, 2026

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released with https://github.com/braintrustdata/braintrust-sdk-python/releases/tag/py-sdk-v0.15.0
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@CLowbrowAlex Z (CLowbrow)CLowbrow approved these changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)AbhiPrasad approved these changes

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@cjgalione@AbhiPrasad@CLowbrow

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
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});
}
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observer.observe(document.body, { childList: true, subtree: true });
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} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
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(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
fix: CachedSpanFetcher no longer caches empty results permanently by cjgalione · Pull Request #79 · braintrustdata/braintrust-sdk-python · GitHub
Skip to content
fix: CachedSpanFetcher no longer caches empty results permanently - #79
Merged
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom 
curtis/cached_span_fetcher_fix
Apr 14, 2026
Merged
fix: CachedSpanFetcher no longer caches empty results permanently#79
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom 
curtis/cached_span_fetcher_fix
Conversation
@cjgalione
@cjgalioneCurtis Galione (cjgalione)
commented
Mar 13, 2026

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Summary
  • CachedSpanFetcher.get_spans() was setting _all_fetched = True even when the fetch returned no spans, permanently caching the empty result and preventing future re-fetches
  • Now only marks as fully fetched when the cache is non-empty, so subsequent calls will retry and pick up spans once they become available
Test plan
  • Updated test_handle_empty_results to verify re-fetch occurs when first call returned empty
  • Added test_empty_then_populated_refetches to confirm spans are returned on retry
  • Added test_empty_results_with_type_filter to confirm type-filtered path also handles empty results
  • Verified existing caching tests still pass (non-empty fetches are still cached)
AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
previously approved these changes
Mar 16, 2026
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If there are a bunch of scorers running, this will mean that get_spans will keep hitting the network, but I guess that is fine.
Comment threadpy/src/braintrust/test_trace.py
 assert result[0].span_id == "span-1"

 @pytest.mark.asyncio
 async def test_empty_then_populated_refetches(self):
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)Mar 16, 2026

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This is pretty similar to test_handle_empty_results. Can we consolidate?
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
dismissed
their stale reviewMarch 16, 2026 22:27
Removing the approve because of slack convo. Trace scorers should always return results here.
CLowbrow
Alex Z (CLowbrow)
approved these changes
Apr 6, 2026
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seems fine but Abhijeet Prasad (@AbhiPrasad) should approve as well.
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
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Apr 6, 2026

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You'll need to rebase to be able to merge, we changed CI to be required to checks-passed, and that was a job introduced in a later commit to the HEAD of this PR branch.
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
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Apr 14, 2026

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I pushed up some changes to get this in a good state. Will merge in!
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
mentioned this pull request
Apr 14, 2026
 Merged

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
merged commit 785ed2b
into
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64 checks passed

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
deleted the

curtis/cached_span_fetcher_fix

branch
April 14, 2026 16:01
Abhijeet Prasad (AbhiPrasad) added a commit
that referenced
this pull request
Apr 14, 2026
@AbhiPrasad
chore: bump to 0.15.0 (#277)
d258198
Includes:
- #247
- #258
- #255
- #253
- #252
- #261
- #265
- #264
- #267
- #268
- #270
- #271
- #275
- #274
- #79
Maybe Includes:
- #276
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
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Apr 14, 2026

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released with https://github.com/braintrustdata/braintrust-sdk-python/releases/tag/py-sdk-v0.15.0
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@cjgalione@AbhiPrasad@CLowbrow

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
fix: CachedSpanFetcher no longer caches empty results permanently by cjgalione · Pull Request #79 · braintrustdata/braintrust-sdk-python · GitHub
Skip to content
fix: CachedSpanFetcher no longer caches empty results permanently - #79
Merged
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom 
curtis/cached_span_fetcher_fix
Apr 14, 2026
Merged
fix: CachedSpanFetcher no longer caches empty results permanently#79
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom 
curtis/cached_span_fetcher_fix
Conversation
@cjgalione
@cjgalioneCurtis Galione (cjgalione)
commented
Mar 13, 2026

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Summary
  • CachedSpanFetcher.get_spans() was setting _all_fetched = True even when the fetch returned no spans, permanently caching the empty result and preventing future re-fetches
  • Now only marks as fully fetched when the cache is non-empty, so subsequent calls will retry and pick up spans once they become available
Test plan
  • Updated test_handle_empty_results to verify re-fetch occurs when first call returned empty
  • Added test_empty_then_populated_refetches to confirm spans are returned on retry
  • Added test_empty_results_with_type_filter to confirm type-filtered path also handles empty results
  • Verified existing caching tests still pass (non-empty fetches are still cached)
AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
previously approved these changes
Mar 16, 2026
View reviewed changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
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If there are a bunch of scorers running, this will mean that get_spans will keep hitting the network, but I guess that is fine.
Comment threadpy/src/braintrust/test_trace.py
 assert result[0].span_id == "span-1"

 @pytest.mark.asyncio
 async def test_empty_then_populated_refetches(self):
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)Mar 16, 2026

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This is pretty similar to test_handle_empty_results. Can we consolidate?
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
dismissed
their stale reviewMarch 16, 2026 22:27
Removing the approve because of slack convo. Trace scorers should always return results here.
CLowbrow
Alex Z (CLowbrow)
approved these changes
Apr 6, 2026
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seems fine but Abhijeet Prasad (@AbhiPrasad) should approve as well.
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 6, 2026

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You'll need to rebase to be able to merge, we changed CI to be required to checks-passed, and that was a job introduced in a later commit to the HEAD of this PR branch.
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 14, 2026

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I pushed up some changes to get this in a good state. Will merge in!
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
mentioned this pull request
Apr 14, 2026
 Merged

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
merged commit 785ed2b
into
mainApr 14, 2026

64 checks passed

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
deleted the

curtis/cached_span_fetcher_fix

branch
April 14, 2026 16:01
Abhijeet Prasad (AbhiPrasad) added a commit
that referenced
this pull request
Apr 14, 2026
@AbhiPrasad
chore: bump to 0.15.0 (#277)
d258198
Includes:
- #247
- #258
- #255
- #253
- #252
- #261
- #265
- #264
- #267
- #268
- #270
- #271
- #275
- #274
- #79
Maybe Includes:
- #276
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 14, 2026

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released with https://github.com/braintrustdata/braintrust-sdk-python/releases/tag/py-sdk-v0.15.0
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@CLowbrowAlex Z (CLowbrow)CLowbrow approved these changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)AbhiPrasad approved these changes

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@cjgalione@AbhiPrasad@CLowbrow

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
fix: CachedSpanFetcher no longer caches empty results permanently by cjgalione · Pull Request #79 · braintrustdata/braintrust-sdk-python · GitHub
Skip to content
fix: CachedSpanFetcher no longer caches empty results permanently - #79
Merged
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom 
curtis/cached_span_fetcher_fix
Apr 14, 2026
Merged
fix: CachedSpanFetcher no longer caches empty results permanently#79
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom 
curtis/cached_span_fetcher_fix
Conversation
@cjgalione
@cjgalioneCurtis Galione (cjgalione)
commented
Mar 13, 2026

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Summary
  • CachedSpanFetcher.get_spans() was setting _all_fetched = True even when the fetch returned no spans, permanently caching the empty result and preventing future re-fetches
  • Now only marks as fully fetched when the cache is non-empty, so subsequent calls will retry and pick up spans once they become available
Test plan
  • Updated test_handle_empty_results to verify re-fetch occurs when first call returned empty
  • Added test_empty_then_populated_refetches to confirm spans are returned on retry
  • Added test_empty_results_with_type_filter to confirm type-filtered path also handles empty results
  • Verified existing caching tests still pass (non-empty fetches are still cached)
AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
previously approved these changes
Mar 16, 2026
View reviewed changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
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If there are a bunch of scorers running, this will mean that get_spans will keep hitting the network, but I guess that is fine.
Comment threadpy/src/braintrust/test_trace.py
 assert result[0].span_id == "span-1"

 @pytest.mark.asyncio
 async def test_empty_then_populated_refetches(self):
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)Mar 16, 2026

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This is pretty similar to test_handle_empty_results. Can we consolidate?
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
dismissed
their stale reviewMarch 16, 2026 22:27
Removing the approve because of slack convo. Trace scorers should always return results here.
CLowbrow
Alex Z (CLowbrow)
approved these changes
Apr 6, 2026
View reviewed changes
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seems fine but Abhijeet Prasad (@AbhiPrasad) should approve as well.
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 6, 2026

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You'll need to rebase to be able to merge, we changed CI to be required to checks-passed, and that was a job introduced in a later commit to the HEAD of this PR branch.
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 14, 2026

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I pushed up some changes to get this in a good state. Will merge in!
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
mentioned this pull request
Apr 14, 2026
 Merged

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
merged commit 785ed2b
into
mainApr 14, 2026

64 checks passed

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
deleted the

curtis/cached_span_fetcher_fix

branch
April 14, 2026 16:01
Abhijeet Prasad (AbhiPrasad) added a commit
that referenced
this pull request
Apr 14, 2026
@AbhiPrasad
chore: bump to 0.15.0 (#277)
d258198
Includes:
- #247
- #258
- #255
- #253
- #252
- #261
- #265
- #264
- #267
- #268
- #270
- #271
- #275
- #274
- #79
Maybe Includes:
- #276
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 14, 2026

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released with https://github.com/braintrustdata/braintrust-sdk-python/releases/tag/py-sdk-v0.15.0
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@CLowbrowAlex Z (CLowbrow)CLowbrow approved these changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)AbhiPrasad approved these changes

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@cjgalione@AbhiPrasad@CLowbrow

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
fix: CachedSpanFetcher no longer caches empty results permanently by cjgalione · Pull Request #79 · braintrustdata/braintrust-sdk-python · GitHub
Skip to content
fix: CachedSpanFetcher no longer caches empty results permanently - #79
Merged
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom 
curtis/cached_span_fetcher_fix
Apr 14, 2026
Merged
fix: CachedSpanFetcher no longer caches empty results permanently#79
Abhijeet Prasad (AbhiPrasad) merged 3 commits into
mainfrom 
curtis/cached_span_fetcher_fix
Conversation
@cjgalione
@cjgalioneCurtis Galione (cjgalione)
commented
Mar 13, 2026

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Summary
  • CachedSpanFetcher.get_spans() was setting _all_fetched = True even when the fetch returned no spans, permanently caching the empty result and preventing future re-fetches
  • Now only marks as fully fetched when the cache is non-empty, so subsequent calls will retry and pick up spans once they become available
Test plan
  • Updated test_handle_empty_results to verify re-fetch occurs when first call returned empty
  • Added test_empty_then_populated_refetches to confirm spans are returned on retry
  • Added test_empty_results_with_type_filter to confirm type-filtered path also handles empty results
  • Verified existing caching tests still pass (non-empty fetches are still cached)
AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
previously approved these changes
Mar 16, 2026
View reviewed changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
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If there are a bunch of scorers running, this will mean that get_spans will keep hitting the network, but I guess that is fine.
Comment threadpy/src/braintrust/test_trace.py
 assert result[0].span_id == "span-1"

 @pytest.mark.asyncio
 async def test_empty_then_populated_refetches(self):
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)Mar 16, 2026

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This is pretty similar to test_handle_empty_results. Can we consolidate?
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
dismissed
their stale reviewMarch 16, 2026 22:27
Removing the approve because of slack convo. Trace scorers should always return results here.
CLowbrow
Alex Z (CLowbrow)
approved these changes
Apr 6, 2026
View reviewed changes
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seems fine but Abhijeet Prasad (@AbhiPrasad) should approve as well.
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 6, 2026

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You'll need to rebase to be able to merge, we changed CI to be required to checks-passed, and that was a job introduced in a later commit to the HEAD of this PR branch.
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 14, 2026

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I pushed up some changes to get this in a good state. Will merge in!
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)
mentioned this pull request
Apr 14, 2026
 Merged

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
merged commit 785ed2b
into
mainApr 14, 2026

64 checks passed

@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
deleted the

curtis/cached_span_fetcher_fix

branch
April 14, 2026 16:01
Abhijeet Prasad (AbhiPrasad) added a commit
that referenced
this pull request
Apr 14, 2026
@AbhiPrasad
chore: bump to 0.15.0 (#277)
d258198
Includes:
- #247
- #258
- #255
- #253
- #252
- #261
- #265
- #264
- #267
- #268
- #270
- #271
- #275
- #274
- #79
Maybe Includes:
- #276
@AbhiPrasad
Abhijeet Prasad (AbhiPrasad)
commented
Apr 14, 2026

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released with https://github.com/braintrustdata/braintrust-sdk-python/releases/tag/py-sdk-v0.15.0
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Reviewers

@CLowbrowAlex Z (CLowbrow)CLowbrow approved these changes
@AbhiPrasadAbhijeet Prasad (AbhiPrasad)AbhiPrasad approved these changes

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@cjgalione@AbhiPrasad@CLowbrow