feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled - #21603

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andreiborza merged 5 commits into
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ab/stream-genai-spans-disable-truncationa
Jun 17, 2026
Merged

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled#21603
andreiborza merged 5 commits into
developfrom
ab/stream-genai-spans-disable-truncationa

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Setting streamGenAiSpans: true now disables gen_ai input truncation by default. Because gen_ai spans are sent as v2 span envelope items, they are not subject to the transaction payload-size limits that truncation works around.

Set enableTruncation: true on the respective AI integration to opt back into truncation.

@andreiborza
andreiborza requested a review from a team as a code ownerJune 17, 2026 11:24
@andreiborza
andreiborza requested review from JPeer264 and mydea and removed request for a teamJune 17, 2026 11:24
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from fd07b23 to d2d45f5CompareJune 17, 2026 11:26
@andreiborza
andreiborza requested review from nicohrubec and removed request for JPeer264 and mydeaJune 17, 2026 11:26
…GenAiSpans` is enabled
Setting `streamGenAiSpans: true` now disables gen_ai input truncation by default.
Because gen_ai spans are sent as v2 span envelope items, they are not subject to
the transaction payload-size limits that truncation works around.
Set `enableTruncation: true` on the respective AI integration to opt back into
truncation.
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from d2d45f5 to f15a1f7CompareJune 17, 2026 11:27
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size-limit report 📦

⚠️Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

PathSize% ChangeChange
@sentry/browser27.45 kB--
@sentry/browser - with treeshaking flags25.88 kB--
@sentry/browser (incl. Tracing)45.88 kB--
@sentry/browser (incl. Tracing + Span Streaming)48.11 kB--
@sentry/browser (incl. Tracing, Profiling)50.65 kB--
@sentry/browser (incl. Tracing, Replay)85.08 kB--
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags74.68 kB--
@sentry/browser (incl. Tracing, Replay with Canvas)89.78 kB--
@sentry/browser (incl. Tracing, Replay, Feedback)102.44 kB--
@sentry/browser (incl. Feedback)44.62 kB--
@sentry/browser (incl. sendFeedback)32.25 kB--
@sentry/browser (incl. FeedbackAsync)37.38 kB--
@sentry/browser (incl. Metrics)28.52 kB--
@sentry/browser (incl. Logs)28.76 kB--
@sentry/browser (incl. Metrics & Logs)29.45 kB--
@sentry/react29.25 kB--
@sentry/react (incl. Tracing)48.17 kB--
@sentry/vue32.56 kB--
@sentry/vue (incl. Tracing)47.74 kB--
@sentry/svelte27.48 kB--
CDN Bundle29.86 kB--
CDN Bundle (incl. Tracing)48.28 kB--
CDN Bundle (incl. Logs, Metrics)31.4 kB--
CDN Bundle (incl. Tracing, Logs, Metrics)49.58 kB--
CDN Bundle (incl. Replay, Logs, Metrics)70.71 kB--
CDN Bundle (incl. Tracing, Replay)85.61 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)86.88 kB--
CDN Bundle (incl. Tracing, Replay, Feedback)91.46 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)92.71 kB--
CDN Bundle - uncompressed88.8 kB--
CDN Bundle (incl. Tracing) - uncompressed146.04 kB--
CDN Bundle (incl. Logs, Metrics) - uncompressed93.5 kB--
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed150.02 kB--
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed218.33 kB--
CDN Bundle (incl. Tracing, Replay) - uncompressed264.91 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed268.87 kB--
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed278.61 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed282.56 kB--
@sentry/nextjs (client)50.58 kB--
@sentry/sveltekit (client)46.27 kB--
@sentry/core/server76.16 kB+0.04%+23 B 🔺
@sentry/core/browser63.31 kB+0.04%+22 B 🔺
@sentry/node-core61.84 kB--
@sentry/node128.3 kB+0.02%+13 B 🔺
@sentry/node - without tracing74.22 kB-0.01%-1 B 🔽
@sentry/aws-serverless85.47 kB-0.01%-1 B 🔽
@sentry/cloudflare (withSentry) - minified174.48 kB--
@sentry/cloudflare (withSentry)436.52 kB--

View base workflow run

* Resolves whether truncation should be enabled.
* If the user explicitly set `enableTruncation`, that value is used.
* Otherwise, truncation is disabled when span streaming is active.
* Otherwise, truncation is disabled when gen_ai spans are streamed — either via full span

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nit: technically this should be more like "when gen_ai spans are sent through the span streaming/v2 path?

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Yep, updated in 6e648eb

Comment threadpackages/core/src/tracing/ai/utils.ts Outdated
Comment threadCHANGELOG.md Outdated

### Important Changes

- **feat(core): Disable gen_ai message truncation by default when `streamGenAiSpans` is enabled ([#21603](https://github.com/getsentry/sentry-javascript/pull/21603))**

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l: should we call this out? I think enableTruncation is not even documented and was meant more for internal testing no?

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No, probably not. I'll move it out of important.

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Removed in 6e648eb

andreiborzaand others added 2 commits June 17, 2026 16:24

@nicohrubecnicohrubec left a comment

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nice

@andreiborza
andreiborza enabled auto-merge (squash) June 17, 2026 14:56
@andreiborza
andreiborza merged commit ccf5571 into developJun 17, 2026
522 of 534 checks passed
@andreiborza
andreiborza deleted the ab/stream-genai-spans-disable-truncationa branch June 17, 2026 19:00
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Skip to content

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled - #21603

Merged
andreiborza merged 5 commits into
developfrom
ab/stream-genai-spans-disable-truncationa
Jun 17, 2026
Merged

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled#21603
andreiborza merged 5 commits into
developfrom
ab/stream-genai-spans-disable-truncationa

Conversation

@andreiborza

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Setting streamGenAiSpans: true now disables gen_ai input truncation by default. Because gen_ai spans are sent as v2 span envelope items, they are not subject to the transaction payload-size limits that truncation works around.

Set enableTruncation: true on the respective AI integration to opt back into truncation.

@andreiborza
andreiborza requested a review from a team as a code ownerJune 17, 2026 11:24
@andreiborza
andreiborza requested review from JPeer264 and mydea and removed request for a teamJune 17, 2026 11:24
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from fd07b23 to d2d45f5CompareJune 17, 2026 11:26
@andreiborza
andreiborza requested review from nicohrubec and removed request for JPeer264 and mydeaJune 17, 2026 11:26
…GenAiSpans` is enabled
Setting `streamGenAiSpans: true` now disables gen_ai input truncation by default.
Because gen_ai spans are sent as v2 span envelope items, they are not subject to
the transaction payload-size limits that truncation works around.
Set `enableTruncation: true` on the respective AI integration to opt back into
truncation.
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from d2d45f5 to f15a1f7CompareJune 17, 2026 11:27
@github-actions

github-actionsBot commented Jun 17, 2026

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size-limit report 📦

⚠️Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

PathSize% ChangeChange
@sentry/browser27.45 kB--
@sentry/browser - with treeshaking flags25.88 kB--
@sentry/browser (incl. Tracing)45.88 kB--
@sentry/browser (incl. Tracing + Span Streaming)48.11 kB--
@sentry/browser (incl. Tracing, Profiling)50.65 kB--
@sentry/browser (incl. Tracing, Replay)85.08 kB--
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags74.68 kB--
@sentry/browser (incl. Tracing, Replay with Canvas)89.78 kB--
@sentry/browser (incl. Tracing, Replay, Feedback)102.44 kB--
@sentry/browser (incl. Feedback)44.62 kB--
@sentry/browser (incl. sendFeedback)32.25 kB--
@sentry/browser (incl. FeedbackAsync)37.38 kB--
@sentry/browser (incl. Metrics)28.52 kB--
@sentry/browser (incl. Logs)28.76 kB--
@sentry/browser (incl. Metrics & Logs)29.45 kB--
@sentry/react29.25 kB--
@sentry/react (incl. Tracing)48.17 kB--
@sentry/vue32.56 kB--
@sentry/vue (incl. Tracing)47.74 kB--
@sentry/svelte27.48 kB--
CDN Bundle29.86 kB--
CDN Bundle (incl. Tracing)48.28 kB--
CDN Bundle (incl. Logs, Metrics)31.4 kB--
CDN Bundle (incl. Tracing, Logs, Metrics)49.58 kB--
CDN Bundle (incl. Replay, Logs, Metrics)70.71 kB--
CDN Bundle (incl. Tracing, Replay)85.61 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)86.88 kB--
CDN Bundle (incl. Tracing, Replay, Feedback)91.46 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)92.71 kB--
CDN Bundle - uncompressed88.8 kB--
CDN Bundle (incl. Tracing) - uncompressed146.04 kB--
CDN Bundle (incl. Logs, Metrics) - uncompressed93.5 kB--
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed150.02 kB--
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed218.33 kB--
CDN Bundle (incl. Tracing, Replay) - uncompressed264.91 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed268.87 kB--
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed278.61 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed282.56 kB--
@sentry/nextjs (client)50.58 kB--
@sentry/sveltekit (client)46.27 kB--
@sentry/core/server76.16 kB+0.04%+23 B 🔺
@sentry/core/browser63.31 kB+0.04%+22 B 🔺
@sentry/node-core61.84 kB--
@sentry/node128.3 kB+0.02%+13 B 🔺
@sentry/node - without tracing74.22 kB-0.01%-1 B 🔽
@sentry/aws-serverless85.47 kB-0.01%-1 B 🔽
@sentry/cloudflare (withSentry) - minified174.48 kB--
@sentry/cloudflare (withSentry)436.52 kB--

View base workflow run

* Resolves whether truncation should be enabled.
* If the user explicitly set `enableTruncation`, that value is used.
* Otherwise, truncation is disabled when span streaming is active.
* Otherwise, truncation is disabled when gen_ai spans are streamed — either via full span

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nit: technically this should be more like "when gen_ai spans are sent through the span streaming/v2 path?

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Yep, updated in 6e648eb

Comment threadpackages/core/src/tracing/ai/utils.ts Outdated
Comment threadCHANGELOG.md Outdated

### Important Changes

- **feat(core): Disable gen_ai message truncation by default when `streamGenAiSpans` is enabled ([#21603](https://github.com/getsentry/sentry-javascript/pull/21603))**

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l: should we call this out? I think enableTruncation is not even documented and was meant more for internal testing no?

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No, probably not. I'll move it out of important.

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Removed in 6e648eb

andreiborzaand others added 2 commits June 17, 2026 16:24

@nicohrubecnicohrubec left a comment

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nice

@andreiborza
andreiborza enabled auto-merge (squash) June 17, 2026 14:56
@andreiborza
andreiborza merged commit ccf5571 into developJun 17, 2026
522 of 534 checks passed
@andreiborza
andreiborza deleted the ab/stream-genai-spans-disable-truncationa branch June 17, 2026 19:00
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Skip to content

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled - #21603

Merged
andreiborza merged 5 commits into
developfrom
ab/stream-genai-spans-disable-truncationa
Jun 17, 2026
Merged

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled#21603
andreiborza merged 5 commits into
developfrom
ab/stream-genai-spans-disable-truncationa

Conversation

@andreiborza

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Setting streamGenAiSpans: true now disables gen_ai input truncation by default. Because gen_ai spans are sent as v2 span envelope items, they are not subject to the transaction payload-size limits that truncation works around.

Set enableTruncation: true on the respective AI integration to opt back into truncation.

@andreiborza
andreiborza requested a review from a team as a code ownerJune 17, 2026 11:24
@andreiborza
andreiborza requested review from JPeer264 and mydea and removed request for a teamJune 17, 2026 11:24
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from fd07b23 to d2d45f5CompareJune 17, 2026 11:26
@andreiborza
andreiborza requested review from nicohrubec and removed request for JPeer264 and mydeaJune 17, 2026 11:26
…GenAiSpans` is enabled
Setting `streamGenAiSpans: true` now disables gen_ai input truncation by default.
Because gen_ai spans are sent as v2 span envelope items, they are not subject to
the transaction payload-size limits that truncation works around.
Set `enableTruncation: true` on the respective AI integration to opt back into
truncation.
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from d2d45f5 to f15a1f7CompareJune 17, 2026 11:27
@github-actions

github-actionsBot commented Jun 17, 2026

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size-limit report 📦

⚠️Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

PathSize% ChangeChange
@sentry/browser27.45 kB--
@sentry/browser - with treeshaking flags25.88 kB--
@sentry/browser (incl. Tracing)45.88 kB--
@sentry/browser (incl. Tracing + Span Streaming)48.11 kB--
@sentry/browser (incl. Tracing, Profiling)50.65 kB--
@sentry/browser (incl. Tracing, Replay)85.08 kB--
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags74.68 kB--
@sentry/browser (incl. Tracing, Replay with Canvas)89.78 kB--
@sentry/browser (incl. Tracing, Replay, Feedback)102.44 kB--
@sentry/browser (incl. Feedback)44.62 kB--
@sentry/browser (incl. sendFeedback)32.25 kB--
@sentry/browser (incl. FeedbackAsync)37.38 kB--
@sentry/browser (incl. Metrics)28.52 kB--
@sentry/browser (incl. Logs)28.76 kB--
@sentry/browser (incl. Metrics & Logs)29.45 kB--
@sentry/react29.25 kB--
@sentry/react (incl. Tracing)48.17 kB--
@sentry/vue32.56 kB--
@sentry/vue (incl. Tracing)47.74 kB--
@sentry/svelte27.48 kB--
CDN Bundle29.86 kB--
CDN Bundle (incl. Tracing)48.28 kB--
CDN Bundle (incl. Logs, Metrics)31.4 kB--
CDN Bundle (incl. Tracing, Logs, Metrics)49.58 kB--
CDN Bundle (incl. Replay, Logs, Metrics)70.71 kB--
CDN Bundle (incl. Tracing, Replay)85.61 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)86.88 kB--
CDN Bundle (incl. Tracing, Replay, Feedback)91.46 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)92.71 kB--
CDN Bundle - uncompressed88.8 kB--
CDN Bundle (incl. Tracing) - uncompressed146.04 kB--
CDN Bundle (incl. Logs, Metrics) - uncompressed93.5 kB--
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed150.02 kB--
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed218.33 kB--
CDN Bundle (incl. Tracing, Replay) - uncompressed264.91 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed268.87 kB--
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed278.61 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed282.56 kB--
@sentry/nextjs (client)50.58 kB--
@sentry/sveltekit (client)46.27 kB--
@sentry/core/server76.16 kB+0.04%+23 B 🔺
@sentry/core/browser63.31 kB+0.04%+22 B 🔺
@sentry/node-core61.84 kB--
@sentry/node128.3 kB+0.02%+13 B 🔺
@sentry/node - without tracing74.22 kB-0.01%-1 B 🔽
@sentry/aws-serverless85.47 kB-0.01%-1 B 🔽
@sentry/cloudflare (withSentry) - minified174.48 kB--
@sentry/cloudflare (withSentry)436.52 kB--

View base workflow run

* Resolves whether truncation should be enabled.
* If the user explicitly set `enableTruncation`, that value is used.
* Otherwise, truncation is disabled when span streaming is active.
* Otherwise, truncation is disabled when gen_ai spans are streamed — either via full span

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nit: technically this should be more like "when gen_ai spans are sent through the span streaming/v2 path?

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MemberAuthor

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Yep, updated in 6e648eb

Comment threadpackages/core/src/tracing/ai/utils.ts Outdated
Comment threadCHANGELOG.md Outdated

### Important Changes

- **feat(core): Disable gen_ai message truncation by default when `streamGenAiSpans` is enabled ([#21603](https://github.com/getsentry/sentry-javascript/pull/21603))**

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l: should we call this out? I think enableTruncation is not even documented and was meant more for internal testing no?

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No, probably not. I'll move it out of important.

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Removed in 6e648eb

andreiborzaand others added 2 commits June 17, 2026 16:24

@nicohrubecnicohrubec left a comment

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nice

@andreiborza
andreiborza enabled auto-merge (squash) June 17, 2026 14:56
@andreiborza
andreiborza merged commit ccf5571 into developJun 17, 2026
522 of 534 checks passed
@andreiborza
andreiborza deleted the ab/stream-genai-spans-disable-truncationa branch June 17, 2026 19:00
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2 participants

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

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled - #21603

Merged
andreiborza merged 5 commits into
developfrom
ab/stream-genai-spans-disable-truncationa
Jun 17, 2026
Merged

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled#21603
andreiborza merged 5 commits into
developfrom
ab/stream-genai-spans-disable-truncationa

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Setting streamGenAiSpans: true now disables gen_ai input truncation by default. Because gen_ai spans are sent as v2 span envelope items, they are not subject to the transaction payload-size limits that truncation works around.

Set enableTruncation: true on the respective AI integration to opt back into truncation.

@andreiborza
andreiborza requested a review from a team as a code ownerJune 17, 2026 11:24
@andreiborza
andreiborza requested review from JPeer264 and mydea and removed request for a teamJune 17, 2026 11:24
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from fd07b23 to d2d45f5CompareJune 17, 2026 11:26
@andreiborza
andreiborza requested review from nicohrubec and removed request for JPeer264 and mydeaJune 17, 2026 11:26
…GenAiSpans` is enabled
Setting `streamGenAiSpans: true` now disables gen_ai input truncation by default.
Because gen_ai spans are sent as v2 span envelope items, they are not subject to
the transaction payload-size limits that truncation works around.
Set `enableTruncation: true` on the respective AI integration to opt back into
truncation.
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from d2d45f5 to f15a1f7CompareJune 17, 2026 11:27
@github-actions

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size-limit report 📦

⚠️Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

PathSize% ChangeChange
@sentry/browser27.45 kB--
@sentry/browser - with treeshaking flags25.88 kB--
@sentry/browser (incl. Tracing)45.88 kB--
@sentry/browser (incl. Tracing + Span Streaming)48.11 kB--
@sentry/browser (incl. Tracing, Profiling)50.65 kB--
@sentry/browser (incl. Tracing, Replay)85.08 kB--
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags74.68 kB--
@sentry/browser (incl. Tracing, Replay with Canvas)89.78 kB--
@sentry/browser (incl. Tracing, Replay, Feedback)102.44 kB--
@sentry/browser (incl. Feedback)44.62 kB--
@sentry/browser (incl. sendFeedback)32.25 kB--
@sentry/browser (incl. FeedbackAsync)37.38 kB--
@sentry/browser (incl. Metrics)28.52 kB--
@sentry/browser (incl. Logs)28.76 kB--
@sentry/browser (incl. Metrics & Logs)29.45 kB--
@sentry/react29.25 kB--
@sentry/react (incl. Tracing)48.17 kB--
@sentry/vue32.56 kB--
@sentry/vue (incl. Tracing)47.74 kB--
@sentry/svelte27.48 kB--
CDN Bundle29.86 kB--
CDN Bundle (incl. Tracing)48.28 kB--
CDN Bundle (incl. Logs, Metrics)31.4 kB--
CDN Bundle (incl. Tracing, Logs, Metrics)49.58 kB--
CDN Bundle (incl. Replay, Logs, Metrics)70.71 kB--
CDN Bundle (incl. Tracing, Replay)85.61 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)86.88 kB--
CDN Bundle (incl. Tracing, Replay, Feedback)91.46 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)92.71 kB--
CDN Bundle - uncompressed88.8 kB--
CDN Bundle (incl. Tracing) - uncompressed146.04 kB--
CDN Bundle (incl. Logs, Metrics) - uncompressed93.5 kB--
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed150.02 kB--
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed218.33 kB--
CDN Bundle (incl. Tracing, Replay) - uncompressed264.91 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed268.87 kB--
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed278.61 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed282.56 kB--
@sentry/nextjs (client)50.58 kB--
@sentry/sveltekit (client)46.27 kB--
@sentry/core/server76.16 kB+0.04%+23 B 🔺
@sentry/core/browser63.31 kB+0.04%+22 B 🔺
@sentry/node-core61.84 kB--
@sentry/node128.3 kB+0.02%+13 B 🔺
@sentry/node - without tracing74.22 kB-0.01%-1 B 🔽
@sentry/aws-serverless85.47 kB-0.01%-1 B 🔽
@sentry/cloudflare (withSentry) - minified174.48 kB--
@sentry/cloudflare (withSentry)436.52 kB--

View base workflow run

* Resolves whether truncation should be enabled.
* If the user explicitly set `enableTruncation`, that value is used.
* Otherwise, truncation is disabled when span streaming is active.
* Otherwise, truncation is disabled when gen_ai spans are streamed — either via full span

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nit: technically this should be more like "when gen_ai spans are sent through the span streaming/v2 path?

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Yep, updated in 6e648eb

Comment threadpackages/core/src/tracing/ai/utils.ts Outdated
Comment threadCHANGELOG.md Outdated

### Important Changes

- **feat(core): Disable gen_ai message truncation by default when `streamGenAiSpans` is enabled ([#21603](https://github.com/getsentry/sentry-javascript/pull/21603))**

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l: should we call this out? I think enableTruncation is not even documented and was meant more for internal testing no?

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No, probably not. I'll move it out of important.

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Removed in 6e648eb

andreiborzaand others added 2 commits June 17, 2026 16:24

@nicohrubecnicohrubec left a comment

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nice

@andreiborza
andreiborza enabled auto-merge (squash) June 17, 2026 14:56
@andreiborza
andreiborza merged commit ccf5571 into developJun 17, 2026
522 of 534 checks passed
@andreiborza
andreiborza deleted the ab/stream-genai-spans-disable-truncationa branch June 17, 2026 19:00
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, 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } 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

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled - #21603

Merged
andreiborza merged 5 commits into
developfrom
ab/stream-genai-spans-disable-truncationa
Jun 17, 2026
Merged

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled#21603
andreiborza merged 5 commits into
developfrom
ab/stream-genai-spans-disable-truncationa

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Setting streamGenAiSpans: true now disables gen_ai input truncation by default. Because gen_ai spans are sent as v2 span envelope items, they are not subject to the transaction payload-size limits that truncation works around.

Set enableTruncation: true on the respective AI integration to opt back into truncation.

@andreiborza
andreiborza requested a review from a team as a code ownerJune 17, 2026 11:24
@andreiborza
andreiborza requested review from JPeer264 and mydea and removed request for a teamJune 17, 2026 11:24
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from fd07b23 to d2d45f5CompareJune 17, 2026 11:26
@andreiborza
andreiborza requested review from nicohrubec and removed request for JPeer264 and mydeaJune 17, 2026 11:26
…GenAiSpans` is enabled
Setting `streamGenAiSpans: true` now disables gen_ai input truncation by default.
Because gen_ai spans are sent as v2 span envelope items, they are not subject to
the transaction payload-size limits that truncation works around.
Set `enableTruncation: true` on the respective AI integration to opt back into
truncation.
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from d2d45f5 to f15a1f7CompareJune 17, 2026 11:27
@github-actions

github-actionsBot commented Jun 17, 2026

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size-limit report 📦

⚠️Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

PathSize% ChangeChange
@sentry/browser27.45 kB--
@sentry/browser - with treeshaking flags25.88 kB--
@sentry/browser (incl. Tracing)45.88 kB--
@sentry/browser (incl. Tracing + Span Streaming)48.11 kB--
@sentry/browser (incl. Tracing, Profiling)50.65 kB--
@sentry/browser (incl. Tracing, Replay)85.08 kB--
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags74.68 kB--
@sentry/browser (incl. Tracing, Replay with Canvas)89.78 kB--
@sentry/browser (incl. Tracing, Replay, Feedback)102.44 kB--
@sentry/browser (incl. Feedback)44.62 kB--
@sentry/browser (incl. sendFeedback)32.25 kB--
@sentry/browser (incl. FeedbackAsync)37.38 kB--
@sentry/browser (incl. Metrics)28.52 kB--
@sentry/browser (incl. Logs)28.76 kB--
@sentry/browser (incl. Metrics & Logs)29.45 kB--
@sentry/react29.25 kB--
@sentry/react (incl. Tracing)48.17 kB--
@sentry/vue32.56 kB--
@sentry/vue (incl. Tracing)47.74 kB--
@sentry/svelte27.48 kB--
CDN Bundle29.86 kB--
CDN Bundle (incl. Tracing)48.28 kB--
CDN Bundle (incl. Logs, Metrics)31.4 kB--
CDN Bundle (incl. Tracing, Logs, Metrics)49.58 kB--
CDN Bundle (incl. Replay, Logs, Metrics)70.71 kB--
CDN Bundle (incl. Tracing, Replay)85.61 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)86.88 kB--
CDN Bundle (incl. Tracing, Replay, Feedback)91.46 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)92.71 kB--
CDN Bundle - uncompressed88.8 kB--
CDN Bundle (incl. Tracing) - uncompressed146.04 kB--
CDN Bundle (incl. Logs, Metrics) - uncompressed93.5 kB--
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed150.02 kB--
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed218.33 kB--
CDN Bundle (incl. Tracing, Replay) - uncompressed264.91 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed268.87 kB--
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed278.61 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed282.56 kB--
@sentry/nextjs (client)50.58 kB--
@sentry/sveltekit (client)46.27 kB--
@sentry/core/server76.16 kB+0.04%+23 B 🔺
@sentry/core/browser63.31 kB+0.04%+22 B 🔺
@sentry/node-core61.84 kB--
@sentry/node128.3 kB+0.02%+13 B 🔺
@sentry/node - without tracing74.22 kB-0.01%-1 B 🔽
@sentry/aws-serverless85.47 kB-0.01%-1 B 🔽
@sentry/cloudflare (withSentry) - minified174.48 kB--
@sentry/cloudflare (withSentry)436.52 kB--

View base workflow run

* Resolves whether truncation should be enabled.
* If the user explicitly set `enableTruncation`, that value is used.
* Otherwise, truncation is disabled when span streaming is active.
* Otherwise, truncation is disabled when gen_ai spans are streamed — either via full span

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nit: technically this should be more like "when gen_ai spans are sent through the span streaming/v2 path?

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MemberAuthor

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Yep, updated in 6e648eb

Comment threadpackages/core/src/tracing/ai/utils.ts Outdated
Comment threadCHANGELOG.md Outdated

### Important Changes

- **feat(core): Disable gen_ai message truncation by default when `streamGenAiSpans` is enabled ([#21603](https://github.com/getsentry/sentry-javascript/pull/21603))**

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l: should we call this out? I think enableTruncation is not even documented and was meant more for internal testing no?

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No, probably not. I'll move it out of important.

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Removed in 6e648eb

andreiborzaand others added 2 commits June 17, 2026 16:24

@nicohrubecnicohrubec left a comment

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nice

@andreiborza
andreiborza enabled auto-merge (squash) June 17, 2026 14:56
@andreiborza
andreiborza merged commit ccf5571 into developJun 17, 2026
522 of 534 checks passed
@andreiborza
andreiborza deleted the ab/stream-genai-spans-disable-truncationa branch June 17, 2026 19:00
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, '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('^' + ".*" + '
Skip to content

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled - #21603

Merged
andreiborza merged 5 commits into
developfrom
ab/stream-genai-spans-disable-truncationa
Jun 17, 2026
Merged

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled#21603
andreiborza merged 5 commits into
developfrom
ab/stream-genai-spans-disable-truncationa

Conversation

@andreiborza

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Setting streamGenAiSpans: true now disables gen_ai input truncation by default. Because gen_ai spans are sent as v2 span envelope items, they are not subject to the transaction payload-size limits that truncation works around.

Set enableTruncation: true on the respective AI integration to opt back into truncation.

@andreiborza
andreiborza requested a review from a team as a code ownerJune 17, 2026 11:24
@andreiborza
andreiborza requested review from JPeer264 and mydea and removed request for a teamJune 17, 2026 11:24
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from fd07b23 to d2d45f5CompareJune 17, 2026 11:26
@andreiborza
andreiborza requested review from nicohrubec and removed request for JPeer264 and mydeaJune 17, 2026 11:26
…GenAiSpans` is enabled
Setting `streamGenAiSpans: true` now disables gen_ai input truncation by default.
Because gen_ai spans are sent as v2 span envelope items, they are not subject to
the transaction payload-size limits that truncation works around.
Set `enableTruncation: true` on the respective AI integration to opt back into
truncation.
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from d2d45f5 to f15a1f7CompareJune 17, 2026 11:27
@github-actions

github-actionsBot commented Jun 17, 2026

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size-limit report 📦

⚠️Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

PathSize% ChangeChange
@sentry/browser27.45 kB--
@sentry/browser - with treeshaking flags25.88 kB--
@sentry/browser (incl. Tracing)45.88 kB--
@sentry/browser (incl. Tracing + Span Streaming)48.11 kB--
@sentry/browser (incl. Tracing, Profiling)50.65 kB--
@sentry/browser (incl. Tracing, Replay)85.08 kB--
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags74.68 kB--
@sentry/browser (incl. Tracing, Replay with Canvas)89.78 kB--
@sentry/browser (incl. Tracing, Replay, Feedback)102.44 kB--
@sentry/browser (incl. Feedback)44.62 kB--
@sentry/browser (incl. sendFeedback)32.25 kB--
@sentry/browser (incl. FeedbackAsync)37.38 kB--
@sentry/browser (incl. Metrics)28.52 kB--
@sentry/browser (incl. Logs)28.76 kB--
@sentry/browser (incl. Metrics & Logs)29.45 kB--
@sentry/react29.25 kB--
@sentry/react (incl. Tracing)48.17 kB--
@sentry/vue32.56 kB--
@sentry/vue (incl. Tracing)47.74 kB--
@sentry/svelte27.48 kB--
CDN Bundle29.86 kB--
CDN Bundle (incl. Tracing)48.28 kB--
CDN Bundle (incl. Logs, Metrics)31.4 kB--
CDN Bundle (incl. Tracing, Logs, Metrics)49.58 kB--
CDN Bundle (incl. Replay, Logs, Metrics)70.71 kB--
CDN Bundle (incl. Tracing, Replay)85.61 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)86.88 kB--
CDN Bundle (incl. Tracing, Replay, Feedback)91.46 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)92.71 kB--
CDN Bundle - uncompressed88.8 kB--
CDN Bundle (incl. Tracing) - uncompressed146.04 kB--
CDN Bundle (incl. Logs, Metrics) - uncompressed93.5 kB--
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed150.02 kB--
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed218.33 kB--
CDN Bundle (incl. Tracing, Replay) - uncompressed264.91 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed268.87 kB--
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed278.61 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed282.56 kB--
@sentry/nextjs (client)50.58 kB--
@sentry/sveltekit (client)46.27 kB--
@sentry/core/server76.16 kB+0.04%+23 B 🔺
@sentry/core/browser63.31 kB+0.04%+22 B 🔺
@sentry/node-core61.84 kB--
@sentry/node128.3 kB+0.02%+13 B 🔺
@sentry/node - without tracing74.22 kB-0.01%-1 B 🔽
@sentry/aws-serverless85.47 kB-0.01%-1 B 🔽
@sentry/cloudflare (withSentry) - minified174.48 kB--
@sentry/cloudflare (withSentry)436.52 kB--

View base workflow run

* Resolves whether truncation should be enabled.
* If the user explicitly set `enableTruncation`, that value is used.
* Otherwise, truncation is disabled when span streaming is active.
* Otherwise, truncation is disabled when gen_ai spans are streamed — either via full span

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nit: technically this should be more like "when gen_ai spans are sent through the span streaming/v2 path?

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MemberAuthor

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Yep, updated in 6e648eb

Comment threadpackages/core/src/tracing/ai/utils.ts Outdated
Comment threadCHANGELOG.md Outdated

### Important Changes

- **feat(core): Disable gen_ai message truncation by default when `streamGenAiSpans` is enabled ([#21603](https://github.com/getsentry/sentry-javascript/pull/21603))**

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l: should we call this out? I think enableTruncation is not even documented and was meant more for internal testing no?

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No, probably not. I'll move it out of important.

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Removed in 6e648eb

andreiborzaand others added 2 commits June 17, 2026 16:24

@nicohrubecnicohrubec left a comment

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nice

@andreiborza
andreiborza enabled auto-merge (squash) June 17, 2026 14:56
@andreiborza
andreiborza merged commit ccf5571 into developJun 17, 2026
522 of 534 checks passed
@andreiborza
andreiborza deleted the ab/stream-genai-spans-disable-truncationa branch June 17, 2026 19:00
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, '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('^' + ".*" + '
Skip to content

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled - #21603

Merged
andreiborza merged 5 commits into
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ab/stream-genai-spans-disable-truncationa
Jun 17, 2026
Merged

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled#21603
andreiborza merged 5 commits into
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ab/stream-genai-spans-disable-truncationa

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Setting streamGenAiSpans: true now disables gen_ai input truncation by default. Because gen_ai spans are sent as v2 span envelope items, they are not subject to the transaction payload-size limits that truncation works around.

Set enableTruncation: true on the respective AI integration to opt back into truncation.

@andreiborza
andreiborza requested a review from a team as a code ownerJune 17, 2026 11:24
@andreiborza
andreiborza requested review from JPeer264 and mydea and removed request for a teamJune 17, 2026 11:24
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from fd07b23 to d2d45f5CompareJune 17, 2026 11:26
@andreiborza
andreiborza requested review from nicohrubec and removed request for JPeer264 and mydeaJune 17, 2026 11:26
…GenAiSpans` is enabled
Setting `streamGenAiSpans: true` now disables gen_ai input truncation by default.
Because gen_ai spans are sent as v2 span envelope items, they are not subject to
the transaction payload-size limits that truncation works around.
Set `enableTruncation: true` on the respective AI integration to opt back into
truncation.
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from d2d45f5 to f15a1f7CompareJune 17, 2026 11:27
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size-limit report 📦

⚠️Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

PathSize% ChangeChange
@sentry/browser27.45 kB--
@sentry/browser - with treeshaking flags25.88 kB--
@sentry/browser (incl. Tracing)45.88 kB--
@sentry/browser (incl. Tracing + Span Streaming)48.11 kB--
@sentry/browser (incl. Tracing, Profiling)50.65 kB--
@sentry/browser (incl. Tracing, Replay)85.08 kB--
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags74.68 kB--
@sentry/browser (incl. Tracing, Replay with Canvas)89.78 kB--
@sentry/browser (incl. Tracing, Replay, Feedback)102.44 kB--
@sentry/browser (incl. Feedback)44.62 kB--
@sentry/browser (incl. sendFeedback)32.25 kB--
@sentry/browser (incl. FeedbackAsync)37.38 kB--
@sentry/browser (incl. Metrics)28.52 kB--
@sentry/browser (incl. Logs)28.76 kB--
@sentry/browser (incl. Metrics & Logs)29.45 kB--
@sentry/react29.25 kB--
@sentry/react (incl. Tracing)48.17 kB--
@sentry/vue32.56 kB--
@sentry/vue (incl. Tracing)47.74 kB--
@sentry/svelte27.48 kB--
CDN Bundle29.86 kB--
CDN Bundle (incl. Tracing)48.28 kB--
CDN Bundle (incl. Logs, Metrics)31.4 kB--
CDN Bundle (incl. Tracing, Logs, Metrics)49.58 kB--
CDN Bundle (incl. Replay, Logs, Metrics)70.71 kB--
CDN Bundle (incl. Tracing, Replay)85.61 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)86.88 kB--
CDN Bundle (incl. Tracing, Replay, Feedback)91.46 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)92.71 kB--
CDN Bundle - uncompressed88.8 kB--
CDN Bundle (incl. Tracing) - uncompressed146.04 kB--
CDN Bundle (incl. Logs, Metrics) - uncompressed93.5 kB--
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed150.02 kB--
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed218.33 kB--
CDN Bundle (incl. Tracing, Replay) - uncompressed264.91 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed268.87 kB--
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed278.61 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed282.56 kB--
@sentry/nextjs (client)50.58 kB--
@sentry/sveltekit (client)46.27 kB--
@sentry/core/server76.16 kB+0.04%+23 B 🔺
@sentry/core/browser63.31 kB+0.04%+22 B 🔺
@sentry/node-core61.84 kB--
@sentry/node128.3 kB+0.02%+13 B 🔺
@sentry/node - without tracing74.22 kB-0.01%-1 B 🔽
@sentry/aws-serverless85.47 kB-0.01%-1 B 🔽
@sentry/cloudflare (withSentry) - minified174.48 kB--
@sentry/cloudflare (withSentry)436.52 kB--

View base workflow run

* Resolves whether truncation should be enabled.
* If the user explicitly set `enableTruncation`, that value is used.
* Otherwise, truncation is disabled when span streaming is active.
* Otherwise, truncation is disabled when gen_ai spans are streamed — either via full span

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nit: technically this should be more like "when gen_ai spans are sent through the span streaming/v2 path?

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Yep, updated in 6e648eb

Comment threadpackages/core/src/tracing/ai/utils.ts Outdated
Comment threadCHANGELOG.md Outdated

### Important Changes

- **feat(core): Disable gen_ai message truncation by default when `streamGenAiSpans` is enabled ([#21603](https://github.com/getsentry/sentry-javascript/pull/21603))**

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l: should we call this out? I think enableTruncation is not even documented and was meant more for internal testing no?

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MemberAuthor

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No, probably not. I'll move it out of important.

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Removed in 6e648eb

andreiborzaand others added 2 commits June 17, 2026 16:24

@nicohrubecnicohrubec left a comment

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nice

@andreiborza
andreiborza enabled auto-merge (squash) June 17, 2026 14:56
@andreiborza
andreiborza merged commit ccf5571 into developJun 17, 2026
522 of 534 checks passed
@andreiborza
andreiborza deleted the ab/stream-genai-spans-disable-truncationa branch June 17, 2026 19:00
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@andreiborza@nicohrubec
, '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); } })(); })();
Skip to content

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled - #21603

Merged
andreiborza merged 5 commits into
developfrom
ab/stream-genai-spans-disable-truncationa
Jun 17, 2026
Merged

feat(core): Disable gen_ai message truncation by default when streamGenAiSpans is enabled#21603
andreiborza merged 5 commits into
developfrom
ab/stream-genai-spans-disable-truncationa

Conversation

@andreiborza

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Setting streamGenAiSpans: true now disables gen_ai input truncation by default. Because gen_ai spans are sent as v2 span envelope items, they are not subject to the transaction payload-size limits that truncation works around.

Set enableTruncation: true on the respective AI integration to opt back into truncation.

@andreiborza
andreiborza requested a review from a team as a code ownerJune 17, 2026 11:24
@andreiborza
andreiborza requested review from JPeer264 and mydea and removed request for a teamJune 17, 2026 11:24
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from fd07b23 to d2d45f5CompareJune 17, 2026 11:26
@andreiborza
andreiborza requested review from nicohrubec and removed request for JPeer264 and mydeaJune 17, 2026 11:26
…GenAiSpans` is enabled
Setting `streamGenAiSpans: true` now disables gen_ai input truncation by default.
Because gen_ai spans are sent as v2 span envelope items, they are not subject to
the transaction payload-size limits that truncation works around.
Set `enableTruncation: true` on the respective AI integration to opt back into
truncation.
@andreiborza
andreiborzaforce-pushed the ab/stream-genai-spans-disable-truncationa branch from d2d45f5 to f15a1f7CompareJune 17, 2026 11:27
@github-actions

github-actionsBot commented Jun 17, 2026

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size-limit report 📦

⚠️Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

PathSize% ChangeChange
@sentry/browser27.45 kB--
@sentry/browser - with treeshaking flags25.88 kB--
@sentry/browser (incl. Tracing)45.88 kB--
@sentry/browser (incl. Tracing + Span Streaming)48.11 kB--
@sentry/browser (incl. Tracing, Profiling)50.65 kB--
@sentry/browser (incl. Tracing, Replay)85.08 kB--
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags74.68 kB--
@sentry/browser (incl. Tracing, Replay with Canvas)89.78 kB--
@sentry/browser (incl. Tracing, Replay, Feedback)102.44 kB--
@sentry/browser (incl. Feedback)44.62 kB--
@sentry/browser (incl. sendFeedback)32.25 kB--
@sentry/browser (incl. FeedbackAsync)37.38 kB--
@sentry/browser (incl. Metrics)28.52 kB--
@sentry/browser (incl. Logs)28.76 kB--
@sentry/browser (incl. Metrics & Logs)29.45 kB--
@sentry/react29.25 kB--
@sentry/react (incl. Tracing)48.17 kB--
@sentry/vue32.56 kB--
@sentry/vue (incl. Tracing)47.74 kB--
@sentry/svelte27.48 kB--
CDN Bundle29.86 kB--
CDN Bundle (incl. Tracing)48.28 kB--
CDN Bundle (incl. Logs, Metrics)31.4 kB--
CDN Bundle (incl. Tracing, Logs, Metrics)49.58 kB--
CDN Bundle (incl. Replay, Logs, Metrics)70.71 kB--
CDN Bundle (incl. Tracing, Replay)85.61 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)86.88 kB--
CDN Bundle (incl. Tracing, Replay, Feedback)91.46 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)92.71 kB--
CDN Bundle - uncompressed88.8 kB--
CDN Bundle (incl. Tracing) - uncompressed146.04 kB--
CDN Bundle (incl. Logs, Metrics) - uncompressed93.5 kB--
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed150.02 kB--
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed218.33 kB--
CDN Bundle (incl. Tracing, Replay) - uncompressed264.91 kB--
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed268.87 kB--
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed278.61 kB--
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed282.56 kB--
@sentry/nextjs (client)50.58 kB--
@sentry/sveltekit (client)46.27 kB--
@sentry/core/server76.16 kB+0.04%+23 B 🔺
@sentry/core/browser63.31 kB+0.04%+22 B 🔺
@sentry/node-core61.84 kB--
@sentry/node128.3 kB+0.02%+13 B 🔺
@sentry/node - without tracing74.22 kB-0.01%-1 B 🔽
@sentry/aws-serverless85.47 kB-0.01%-1 B 🔽
@sentry/cloudflare (withSentry) - minified174.48 kB--
@sentry/cloudflare (withSentry)436.52 kB--

View base workflow run

* Resolves whether truncation should be enabled.
* If the user explicitly set `enableTruncation`, that value is used.
* Otherwise, truncation is disabled when span streaming is active.
* Otherwise, truncation is disabled when gen_ai spans are streamed — either via full span

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nit: technically this should be more like "when gen_ai spans are sent through the span streaming/v2 path?

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MemberAuthor

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Yep, updated in 6e648eb

Comment threadpackages/core/src/tracing/ai/utils.ts Outdated
Comment threadCHANGELOG.md Outdated

### Important Changes

- **feat(core): Disable gen_ai message truncation by default when `streamGenAiSpans` is enabled ([#21603](https://github.com/getsentry/sentry-javascript/pull/21603))**

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l: should we call this out? I think enableTruncation is not even documented and was meant more for internal testing no?

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MemberAuthor

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No, probably not. I'll move it out of important.

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Removed in 6e648eb

andreiborzaand others added 2 commits June 17, 2026 16:24

@nicohrubecnicohrubec left a comment

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nice

@andreiborza
andreiborza enabled auto-merge (squash) June 17, 2026 14:56
@andreiborza
andreiborza merged commit ccf5571 into developJun 17, 2026
522 of 534 checks passed
@andreiborza
andreiborza deleted the ab/stream-genai-spans-disable-truncationa branch June 17, 2026 19:00
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