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fix(server-utils): Record Vercel AI system instructions from message objects - #26181
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…objects Closes: #26079 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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size-limit report 📦Compared: a970ffe (PR test merge using develop at 24aed1b) Against: 24aed1b (develop) · base run #65247 ✅ Baseline matches: this diff contains only this PR's changes.
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Optional E2E testsSome optional checks were not successful. They do not block the merge. 6 not successful, 50 successful. See the run.
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andreiborza
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November 6, 2026 14:43
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What
Vercel AI spans now record
gen_ai.system_instructionswhen the system prompt is a message object or an array of messages.Why
The AI SDK accepts these forms, and they are the documented way to set provider options such as Anthropic prompt caching. The spans lost the system prompt for these calls.
Closes: #26079