Who contributed to Vercel on June 18, 2026?

8 developers shipped this update, including pranaygp, lubieowoce, acdlite, feugy, agadzik, timolins, AndrewBarba, and ruiconti.

What were the notable Vercel updates?

perf(core): skip per-step events.list via inline event-log delta, perf(core): lazy inline step start (save one world round-trip per step), and [App Shells] Allow root params in app shells.

@vercel

Next.js + the Vercel platform - frontend infrastructure for the web

github ↗

Pick a date

Topics: JavaScript Full archive →

The Wire · Showcase

WORKFLOW CUTS STEP LATENCY IN HALF WITH LAZY INLINE EXECUTION

By RepoJournal · Filed 06:00 UTC on June 18, 2026 · About Vercel

8 people shipped this

pranaygp @pranaygp 2 cited

lubieowoce @lubieowoce 1 cited

acdlite @acdlite 1 cited

feugy @feugy 1 cited

agadzik @agadzik 1 cited

timolins @timolins 1 cited

AndrewBarba @AndrewBarba 1 cited

ruiconti @ruiconti 1 cited

Two performance wins collapse network round-trips per step: lazy inline step start eliminates the separate step_created call, and inline event-log delta skips redundant event.list fetches on sequential workflows.

The workflow runtime has been bleeding latency on every step. Each iteration called `loadWorkflowRunEvents` to re-read events the handler just wrote inline [1], pure network overhead on owned execution paths. Pairing that with lazy inline step start [2], which materializes steps on-the-fly instead of round-tripping `step_created` separately, collapses what was two network calls per step into one. For simple sequential workflows this is the difference between 200ms and 400ms. Meanwhile, Next.js is preparing for root params in App Shells [3], which required reworking vary params serialization in the Flight stream to survive stage rewinding [4]. On the CLI side, `vc metrics` gained timezone bucketing support for daily granularity metrics [5], and a new `vercel traces create` subcommand wraps the curl tracing flow [6]. Eve's human-in-the-loop story is now properly documented [7], with fixes landing for dynamic tool approval gates [8] and credential resolution for linked projects [9].

Action items

→ Review and merge workflow performance PRs 2478 and 2475 to ship the latency wins vercel/workflow [immediate]
→ Merge workflow Version Packages when ready to cut the release vercel/workflow [plan]
→ Test Next.js App Shell root params on your local branches vercel/next.js [plan]
→ Update local CLI tooling to account for hardened project-local lookup vercel/vercel [monitor]

References

[1] perf(core): skip per-step events.list via inline event-log delta ↗ vercel/workflow
[2] perf(core): lazy inline step start (save one world round-trip per step) ↗ vercel/workflow
[3] [App Shells] Allow root params in app shells ↗ vercel/next.js
[4] Support vary params rewinding ↗ vercel/next.js
[5] feat: vc metrics improvements ↗ vercel/vercel
[6] [cli] add `traces create` as an alias for `curl --trace` ↗ vercel/vercel
[7] docs: dedicated human-in-the-loop page ↗ vercel/eve
[8] fix(eve): harness - preserve approval gates on dynamic tools ↗ vercel/eve
[9] fix(eve): recognize linked-project gateway credentials ↗ vercel/eve

Quick answers

What shipped in Vercel on June 18, 2026?: Two performance wins collapse network round-trips per step: lazy inline step start eliminates the separate step_created call, and inline event-log delta skips redundant event.list fetches on sequential workflows. In total, 56 commits, 60 pull requests, and 13 releases landed.
Who contributed to Vercel on June 18, 2026?: 8 developers shipped this update, including pranaygp, lubieowoce, acdlite, feugy, agadzik, timolins, AndrewBarba, and ruiconti.
What were the notable Vercel updates?: perf(core): skip per-step events.list via inline event-log delta, perf(core): lazy inline step start (save one world round-trip per step), and [App Shells] Allow root params in app shells.

TURBOPACK RUNTIME FIXES SHIP AS NEXT.JS LOCKS DOWN APP SHELL STREAMING

Sampoder eliminated a high-severity deoptimization in Turbopack's chunk URL resolution that was bailing out on large import trees, while the team shipped per-segment prefetch offsets to squeeze more performance out of static rendering.

javascript 12 shipped 1-min read

@vercel 2 days ago

NEXT.JS PLUGS MEMORY LEAK IN EDGE RUNTIME, FIXES DEV OVERLAY ENCODING BUGS

A critical sandbox memory leak that causes step-like heap growth in self-hosted Next.js servers is patched, while dev overlay symbolication now correctly handles project paths with special characters.

javascript 31 shipped 2-min read

@vercel 3 days ago

NEXT.JS OPTIMIZES APP ROUTING ENTRY POINTS WHILE WORKFLOW CUTS STREAM LATENCY 20 PERCENT

Next.js extracted invariant app-page handlers into shared runtime modules while Workflow's stream write batching moves into core, eliminating per-token round trips on idle producers.

+11

javascript 126 shipped 2-min read

@vercel 4 days ago

TWO CRITICAL SECURITY PATCHES LAND IN WORKFLOW AND EVE OVERNIGHT

Next 16.2.11 and PostCSS 8.5.12 patches ship across workflow to seal CVE vulnerabilities, while Eve locks down workflow failure visibility.

javascript 153 shipped 1-min read

Elsewhere on the wire

AI Agents about 21 hours ago

CLINE SHIPS FIVE CRITICAL AGENT FIXES AFTER END-TO-END TESTING BLITZ

Saoudrizwan just landed a cascade of fixes that prevent the agent loop from running wild, stop file reads from resolving to the wrong directory, and plug the compaction pipeline.

ai-agents 16 shipped 2-min read

Local LLMs about 21 hours ago

LLAMA.CPP SHIPS MINIMAX-M3 SPARSE ATTENTION, VLLM UNLOCKS HETEROGENEOUS PREFILL-DECODE

The inference stack gets a new model architecture and a fundamental shift in how prefill and decode can run on different hardware configurations.

+10

llms 125 shipped 1-min read

@CachyOS about 21 hours ago

GLIBC 2.43 REBUILD SHIPS, INSTALLER JUMPS TO C++26

CachyOS pushed glibc 2.43 through the pipeline while the CLI installer upgraded its C++ standard to C++26, signaling a major refresh across core infrastructure.

infra 97 shipped 1-min read

Elixir & Phoenix about 21 hours ago

ECTO FIXES SUBQUERY PLANNING IN JOINS, ELIXIR PATCHES IEX PARSING

Ecto's query planner now handles subqueries correctly in interpolated join filters, while Elixir fixes a syntax error that broke 'not in' as a continuation operator in IEx.