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Vercel @vercel
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wire 2026-05-26
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GO AND RUST BUILDERS UNLOCK CUSTOM BUILD PIPELINES, SDK FACES BREAKING CHANGES

By RepoJournal · Filed · About Vercel · Composed from the cited sources · methodology

gscho dnwpark ismaelrumzan dferber90
4 people shipped this
gscho @gscho 1 cited dnwpark @dnwpark 1 cited ismaelrumzan @ismaelrumzan 1 cited dferber90 @dferber90 1 cited

Vercel's Go builder now supports buildCommand and preDeployCommand, giving teams granular control over compilation, while the TypeScript SDK ships breaking changes to checks and teams endpoints that demand immediate integration review.

The Go builder [1] landed support for buildCommand and preDeployCommand, replacing hardcoded build logic with a flexible discovery system that checks $VERCEL_OUTPUT_FILE, well-known binary names, and workPath. This mirrors the flexibility already available in Node and Python builders, and arrives alongside a Rust builder enhancement [2] that now emits project manifests with framework metadata, runtime versions, and dependency trees during build. On the SDK front, @vercel/sdk 1.21.8 [3] introduces three breaking changes across checksV2.listCheckRuns(), teams.getTeams(), and teams.patchTeam() that will require integration updates. The SDK generation pipeline was unblocked [4] by manually removing orphaned sandbox-related files that the Speakeasy generator left stranded when SandboxCommand was removed from the OpenAPI spec, preventing CI failures on future runs. In flags infrastructure [5], the team hardened package.json validation to catch missing repository metadata before npm registry submission, eliminating 422 errors on sigstore provenance verification.

$ ls vercel/reviews/ # the step-back reads

the week in review Turborepo adds Go workspace graph, fixes hashing the month in review Workflow 4.8 overhauls delivery and sessions, Eve compacts traces, Turbopack cache defaults on
Full archive → Weekly reviews →

Quick answers

What shipped in Vercel on May 26, 2026?
Vercel's Go builder now supports buildCommand and preDeployCommand, giving teams granular control over compilation, while the TypeScript SDK ships breaking changes to checks and teams endpoints that demand immediate integration review. In total, 8 commits, 8 pull requests, and 2 releases landed.
Who contributed to Vercel on May 26, 2026?
4 developers shipped this update, including gscho, dnwpark, ismaelrumzan, and dferber90.
What were the notable Vercel updates?
[go] Add support for preDeploy and buildCommand to Go, [services] Add project manifest to rust builder, and typescript - v1.21.8 - 2026-05-25 22:18:51.
♥

$ log @vercel --recent

Turbopack GC gets a config key and the runtime sheds peer state 172 shipped xAI drops Chat Completions, eve breaks registry installs, Turbopack widens tree-shaking 155 shipped Next.js fixes cache warming env bug, eve gains audience hooks 167 shipped Turborepo patches Remix and Nuxt env hashing, shop ships Eve agent 10 shipped

$ log --all # elsewhere on the wire

Agent Security Quiet day in agent security as guard coverage reaches four clients Alignment & Post-training verl defaults Ascend RL mode, open-instruct unblocks SFT packing

$ ls showcases/

Safety Evals AI Red Teaming Agent Security Interpretability Alignment & Post-training

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