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fix(server-utils): Read Bedrock Claude stream output tokens from message_delta - #26170

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ab/fix-bedrock-claude-stream-output-tokens
Nov 6, 2026
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andreiborza merged 1 commit into
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ab/fix-bedrock-claude-stream-output-tokens

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What

Bedrock Claude streams now record the final output token count from message_delta.

Why

The count in message_start is only a placeholder, so Claude stream spans showed about 1 output token.

Extracted from #26118.

…age_delta

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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size-limit report 📦

Compared: 5af7699 (PR test merge using develop at b368f76)

Against: b368f76 (develop) · base run #65225

✅ Baseline matches: this diff contains only this PR's changes.

Path Size % Change Change
@sentry/browser 30.41 kB - -
@sentry/browser - with treeshaking flags 28.55 kB - -
@sentry/browser - with treeshaking flags tracing without tracing 28.44 kB - -
@sentry/browser (incl. Tracing) 52.73 kB - -
@sentry/browser (incl. Tracing + Span Streaming) 52.74 kB - -
@sentry/browser (incl. Tracing, Profiling) 55.71 kB - -
@sentry/browser (incl. Tracing, Replay) 93.05 kB - -
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags 81.64 kB - -
@sentry/browser (incl. Tracing, Replay with Canvas) 97.79 kB - -
@sentry/browser (incl. Tracing, Replay, Feedback) 110.78 kB - -
@sentry/browser (incl. Feedback) 48 kB - -
@sentry/browser (incl. sendFeedback) 35.52 kB - -
@sentry/browser (incl. FeedbackAsync) 40.62 kB - -
@sentry/browser (incl. Metrics) 31.45 kB - -
@sentry/browser (incl. Logs) 31.74 kB - -
@sentry/browser (incl. Metrics & Logs) 32.46 kB - -
@sentry/react 32.29 kB - -
@sentry/react (incl. Tracing) 55.12 kB - -
@sentry/vue 38.68 kB - -
@sentry/vue (incl. Tracing) 55.75 kB - -
@sentry/svelte 30.44 kB - -
@sentry/remix (Remix 3 client bundle) 57.84 kB - -
CDN Bundle 32.21 kB - -
CDN Bundle (incl. Tracing) 53.28 kB - -
CDN Bundle (incl. Logs, Metrics) 34.48 kB - -
CDN Bundle (incl. Tracing, Logs, Metrics) 55.22 kB - -
CDN Bundle (incl. Replay, Logs, Metrics) 75.89 kB - -
CDN Bundle (incl. Tracing, Replay) 91.5 kB - -
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) 93.43 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback) 97.6 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) 99.59 kB - -
CDN Bundle - uncompressed 94.74 kB - -
CDN Bundle (incl. Tracing) - uncompressed 157.74 kB - -
CDN Bundle (incl. Logs, Metrics) - uncompressed 101.22 kB - -
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed 163.48 kB - -
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed 232.78 kB - -
CDN Bundle (incl. Tracing, Replay) - uncompressed 279.44 kB - -
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed 285.16 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed 293.14 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed 298.85 kB - -
@sentry/nextjs (client) 58.07 kB - -
@sentry/sveltekit (client) 53.25 kB - -
@sentry/core/server 44.25 kB - -
@sentry/core/browser 13.93 kB - -
@sentry/node 157.2 kB +0.02% +19 B 🔺
@sentry/node/import (ESM hook with diagnostics-channel injection) 82.28 kB - -
@sentry/node - without tracing 97.12 kB +0.02% +14 B 🔺
@sentry/node - without channel injection 137.53 kB +0.02% +20 B 🔺
@sentry/aws-serverless 105.76 kB +0.03% +23 B 🔺
@sentry/cloudflare (withSentry) - minified 200.76 kB - -
@sentry/cloudflare (withSentry) 499.11 kB - -
@sentry/nextjs/cloudflare (withSentry) - minified 222.76 kB - -

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@andreiborza
andreiborza marked this pull request as ready for review November 6, 2026 11:17
@andreiborza
andreiborza requested a review from a team as a code owner November 6, 2026 11:17
@andreiborza
andreiborza requested review from a team, chargome, isaacs, mydea and nicohrubec and removed request for a team November 6, 2026 11:17
@andreiborza
andreiborza enabled auto-merge (squash) November 6, 2026 11:27
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@andreiborza
andreiborza merged commit a1a1de0 into develop Nov 6, 2026
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@andreiborza
andreiborza deleted the ab/fix-bedrock-claude-stream-output-tokens branch November 6, 2026 11:33
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