Who contributed to Vercel on August 13, 2026?

12 developers shipped this update, including VaguelySerious, mitul-s, karthikscale3, Josh Story, timneutkens, Stanzilla, unstubbable, and Felix Arntz, and 4 more.

What were the notable Vercel updates?

[world-local] Fix CORRUPTED_EVENT_LOG from hook-resume staging slot holes, [core] Report the replay position on every event write, and feat(core): measure hook-triggered time to resume.

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The Wire · Showcase

WORKFLOW FIXES CORRUPTED EVENT LOG RACE CONDITION WHILE NEXT.JS ROLLS OUT RDC COMPRESSION

By RepoJournal · Filed 06:56 UTC on August 13, 2026 · About Vercel

12 people shipped this

VaguelySerious @VaguelySerious 3 cited

ai-sdk-factory[bot] @ai-sdk-factory[bot] 2 cited

karthikscale3 @karthikscale3 1 cited

Josh Story @gnoff 1 cited

timneutkens @timneutkens 1 cited

Stanzilla @Stanzilla 1 cited

unstubbable @unstubbable 1 cited

github-actions[bot] @github-actions[bot] 1 cited

chadhietala @chadhietala 1 cited

mitul-s @mitul-s

Felix Arntz @felixarntz

Nick Oates @n1ckoates

Workflow patched a critical event-log corruption bug in hook-resume staging that could lose data under concurrent replays, while Next.js adds controlled rollout flags for Resume Data Cache compression.

The Workflow team shipped three fixes to `@workflow/world-local` addressing a data corruption issue where `hook_received` events staged under `.locks` could collide on event id alone, causing writers to bump to the wrong slot under the new slot-event-id system [1]. Alongside this, every replay-context write now reports the log position it was computed against, replacing the ULID-era snapshot triple that previously carried this signal [2]. The team also deployed hooks-triggered time-to-resume observability with phase-level breakdown across producer prep, queue delivery, resume setup, replay, and step dispatch [3], and changed duplicate event handling to ignore stale replays per event class instead of failing the entire run [4].

Next.js addressed RDC compression rollout with `experimental.disableResumeDataCacheCompression` as an opt-in flag to preserve raw JSON during controlled minimal-mode testing [5], while fixing a regression where Turbopack was adding `crossorigin=""` to script tags when crossOrigin wasn't configured [6]. The Pages Router gained support for preserving custom 404 and 500 entries during selective `--debug-build-paths` builds [7], and `headers()` was restored to reflect the live incoming request after internal stripping logic left it detached [8].

AI SDK removed the deprecated `@ai-sdk/vercel` provider, fixed OTEL span attributes to omit non-finite numbers that JSON cannot serialize [9], and corrected chat request resolution when onFinish callbacks throw [10]. Eve released the Buzz ACP adapter for compatibility with local agent deployments [11] and shipped the complete instrumentation provider layout with durable tracing across channel deliveries, runtime actions, and provider event capture policies [12].

Action items

→ Review Workflow event-log fixes [ref:1] before next deployment if using hook-resume with concurrent replays vercel/workflow [plan]
→ Test RDC compression rollout with new disableResumeDataCacheCompression flag before production upgrade vercel/next.js [plan]
→ Upgrade AI SDK to pick up OTEL and onFinish callback fixes if streaming structured outputs vercel/ai [monitor]
→ Check Eve instrumentation providers docs if deploying observability agents with custom metadata policies vercel/eve [monitor]

References

[1] [world-local] Fix CORRUPTED_EVENT_LOG from hook-resume staging slot holes ↗ vercel/workflow
[2] [core] Report the replay position on every event write ↗ vercel/workflow
[3] feat(core): measure hook-triggered time to resume ↗ vercel/workflow
[4] [core] Ignore duplicate events per event class instead of failing the run ↗ vercel/workflow
[5] Add RDC compression rollout controls (#97247) vercel/next.js
[6] Fix unset crossOrigin in Turbopack manifests ↗ vercel/next.js
[7] Fix debug build paths Pages Router support entries ↗ vercel/next.js
[8] Restore the live `headers()` view of the incoming request ↗ vercel/next.js
[9] fix(otel): omit non-finite numeric span attributes (#18808) vercel/ai
[10] fix: Chat requests resolve when onFinish throws (#18755) vercel/ai
[11] @eve/buzz-acp-adapter@0.0.1 ↗ vercel/eve
[12] feat(eve): add the instrumentation provider layout ↗ vercel/eve

Quick answers

What shipped in Vercel on August 13, 2026?: Workflow patched a critical event-log corruption bug in hook-resume staging that could lose data under concurrent replays, while Next.js adds controlled rollout flags for Resume Data Cache compression. In total, 83 commits, 87 pull requests, and 15 releases landed.
Who contributed to Vercel on August 13, 2026?: 12 developers shipped this update, including VaguelySerious, mitul-s, karthikscale3, Josh Story, timneutkens, Stanzilla, unstubbable, and Felix Arntz, and 4 more.
What were the notable Vercel updates?: [world-local] Fix CORRUPTED_EVENT_LOG from hook-resume staging slot holes, [core] Report the replay position on every event write, and feat(core): measure hook-triggered time to resume.

NEXT.JS UNIFIES RSC RESPONSE PIPELINE, AI SDK FIXES SILENT TOOL DROPS

Next.js completed a multi-part refactor to route all RSC requests through a single NavigationFlightResponse format, eliminating hand-synced positional arrays and shared cache-write logic across the router.

javascript 158 shipped

@vercel Aug 12

AI SDK ADDS TYPED COMPLETION BODIES, GROK VIDEO 1.5 SUPPORT LANDS

Vercel/ai shipped typed generics for custom completion bodies across all frameworks, while xAI Grok Imagine Video 1.5 integration arrives with 1080p native output and reference voice support.

javascript 127 shipped

@vercel Aug 11

WORKFLOW EVENT ORDERING FIXED, SANDBOX PINNING NODE VERSIONS, EVE GAINS SANDBOX STOPS

Vercel shipped fixes across three major systems overnight: workflow's event consumer now respects delivery timing, sandbox images pin exact Node versions, and Eve lets authored code stop sandboxes mid-execution.

+12

javascript 126 shipped

@vercel Aug 10

PHOTON SETUP FIXED, AI SDK PATCHES REASONING TOKEN EDGE CASE

Eve's Photon integration now correctly detects dedicated projects and skips redundant registration, while the AI SDK patches a token-counting bug hitting reasoning models on Baseten.

javascript 25 shipped

Elsewhere on the wire

AI Agents Aug 14

LANGCHAIN SHIPS OPENAI 3.0 SUPPORT, CLINE PATCHES SANDBOX LEAKS

LangChain's openai integration now supports the OpenAI Python SDK 3.0 while maintaining backward compatibility, and Cline fixes unbounded subprocess growth in long-running deployments.

ai-agents 37 shipped

Local LLMs Aug 14

OLLAMA LAUNCHES DEEPSEEK AND MUSE INTEGRATIONS WHILE VLLM SHIPS HARDWARE-AGNOSTIC MODELING

Ollama just opened its launch ecosystem to DeepSeek Harness and Meta's Muse Code, while vLLM pivots to HuggingFace transformers as a unified backend for tail models.

+12

llms 261 shipped

@CachyOS Aug 14

CACHY AUR KEEPS PACE: FOUR MAJOR PACKAGE BUMPS OVERNIGHT

Claude, ChatGPT, and Zen Browser all shipped point releases into the AUR-derived repos while the core PKGBUILDS pipeline handled Go, Python, and OBS Studio rebuilds.