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Revert "[prebuilt-skew-protection] feat: adding in automatic deploymentId"#88942

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eps1lon merged 1 commit intocanaryfrom
revert-88496-revert-88449-revert-88012-brooke/addAutomaticDeploymentId
Jan 23, 2026
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Revert "[prebuilt-skew-protection] feat: adding in automatic deploymentId"#88942
eps1lon merged 1 commit intocanaryfrom
revert-88496-revert-88449-revert-88012-brooke/addAutomaticDeploymentId

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@eps1lon eps1lon commented Jan 23, 2026

Reverts #88496

This is broken according to @mischnic. We can try to reland after we get deployment tests running. They've been broken for a while and we haven't synced for too long now.

@nextjs-bot nextjs-bot added created-by: Next.js team PRs by the Next.js team. Documentation Related to Next.js' official documentation. tests type: next labels Jan 23, 2026
@eps1lon eps1lon requested a review from mischnic January 23, 2026 10:48
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Notifying the following users due to files changed in this PR based on this repo's notify modifiers:

@timneutkens, @ijjk, @shuding, @huozhi:

packages/next/src/server/config.ts

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Stats from current PR

🟢 1 improvement

Metric Canary PR Change Trend
node_modules Size 461 MB 460 MB 🟢 207 kB (0%) █████
📊 All Metrics
📖 Metrics Glossary

Dev Server Metrics:

  • Listen = TCP port starts accepting connections
  • First Request = HTTP server returns successful response
  • Cold = Fresh build (no cache)
  • Warm = With cached build artifacts

Build Metrics:

  • Fresh = Clean build (no .next directory)
  • Cached = With existing .next directory

Change Thresholds:

  • Time: Changes < 50ms AND < 10%, OR < 2% are insignificant
  • Size: Changes < 1KB AND < 1% are insignificant
  • All other changes are flagged to catch regressions

⚡ Dev Server

Metric Canary PR Change Trend
Cold (Listen) 456ms 455ms ▁▁█▁▁
Cold (Ready in log) 440ms 442ms ▆▁█▂▇
Cold (First Request) 819ms 821ms █▁▅▂█
Warm (Listen) 456ms 456ms ▁▁█▁▁
Warm (Ready in log) 438ms 442ms ▁▁█▃▁
Warm (First Request) 340ms 343ms ▅▁█▇▅
📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric Canary PR Change Trend
Cold (Listen) 456ms 507ms ▁▅█▁▅
Cold (Ready in log) 458ms 461ms █▅█▇▁
Cold (First Request) 1.844s 1.795s ▆▆█▆▁
Warm (Listen) 457ms 507ms ▁▁█▁▁
Warm (Ready in log) 459ms 462ms ▅▅▆▅▁
Warm (First Request) 1.846s 1.829s ▅▆█▄▁

⚡ Production Builds

Metric Canary PR Change Trend
Fresh Build 4.314s 4.322s ▁▂█▃▁
Cached Build 4.322s 4.318s ▁▂█▃▁
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric Canary PR Change Trend
Fresh Build 14.580s 14.518s ▂▃█▂▂
Cached Build 14.684s 14.775s ▂▃█▄▂
node_modules Size 461 MB 460 MB 🟢 207 kB (0%) █████
📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **432 kB** → **432 kB** ✅ -32 B

82 files with content-based hashes (individual files not comparable between builds)

Server

Middleware
Canary PR Change
middleware-b..fest.js gzip 762 B 768 B
Total 762 B 768 B ⚠️ +6 B
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 450 B 451 B
Total 450 B 451 B ⚠️ +1 B

📦 Webpack

Client

Main Bundles
Canary PR Change
2086.HASH.js gzip 169 B N/A -
2161-HASH.js gzip 5.41 kB N/A -
2747-HASH.js gzip 4.48 kB N/A -
4322-HASH.js gzip 52.7 kB N/A -
ec793fe8-HASH.js gzip 62.3 kB N/A -
framework-HASH.js gzip 59.8 kB 59.8 kB
main-app-HASH.js gzip 251 B 254 B 🔴 +3 B (+1%)
main-HASH.js gzip 38.7 kB 39.1 kB
webpack-HASH.js gzip 1.68 kB 1.68 kB
1596.HASH.js gzip N/A 169 B -
2658-HASH.js gzip N/A 52.4 kB -
6349-HASH.js gzip N/A 4.46 kB -
7019-HASH.js gzip N/A 5.43 kB -
b17a3386-HASH.js gzip N/A 62.3 kB -
Total 226 kB 226 kB ⚠️ +55 B
Polyfills
Canary PR Change
polyfills-HASH.js gzip 39.4 kB 39.4 kB
Total 39.4 kB 39.4 kB
Pages
Canary PR Change
_app-HASH.js gzip 194 B 193 B
_error-HASH.js gzip 182 B 182 B
css-HASH.js gzip 336 B 335 B
dynamic-HASH.js gzip 1.8 kB 1.8 kB
edge-ssr-HASH.js gzip 256 B 256 B
head-HASH.js gzip 352 B 349 B
hooks-HASH.js gzip 385 B 384 B
image-HASH.js gzip 580 B 580 B
index-HASH.js gzip 259 B 258 B
link-HASH.js gzip 2.5 kB 2.51 kB
routerDirect..HASH.js gzip 319 B 317 B
script-HASH.js gzip 385 B 387 B
withRouter-HASH.js gzip 316 B 315 B
1afbb74e6ecf..834.css gzip 106 B 106 B
Total 7.97 kB 7.96 kB ✅ -8 B

Server

Edge SSR
Canary PR Change
edge-ssr.js gzip 126 kB 126 kB
page.js gzip 244 kB 240 kB 🟢 4.8 kB (-2%)
Total 371 kB 366 kB ✅ -5.06 kB
Middleware
Canary PR Change
middleware-b..fest.js gzip 619 B 617 B
middleware-r..fest.js gzip 155 B 156 B
middleware.js gzip 33.2 kB 33.2 kB
edge-runtime..pack.js gzip 842 B 842 B
Total 34.8 kB 34.9 kB ⚠️ +78 B
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 738 B 738 B
Total 738 B 738 B
Build Cache
Canary PR Change
0.pack gzip 3.71 MB 3.72 MB 🔴 +10.5 kB (+0%)
index.pack gzip 101 kB 101 kB
index.pack.old gzip 102 kB 101 kB 🟢 1.33 kB (-1%)
Total 3.91 MB 3.92 MB ⚠️ +9.66 kB

🔄 Shared (bundler-independent)

Runtimes
Canary PR Change
app-page-exp...dev.js gzip 306 kB 306 kB
app-page-exp..prod.js gzip 163 kB 163 kB
app-page-tur...dev.js gzip 306 kB 306 kB
app-page-tur..prod.js gzip 163 kB 163 kB
app-page-tur...dev.js gzip 303 kB 302 kB
app-page-tur..prod.js gzip 161 kB 161 kB
app-page.run...dev.js gzip 303 kB 303 kB
app-page.run..prod.js gzip 161 kB 161 kB
app-route-ex...dev.js gzip 69.4 kB 69.4 kB
app-route-ex..prod.js gzip 48.2 kB 48.2 kB
app-route-tu...dev.js gzip 69.5 kB 69.4 kB
app-route-tu..prod.js gzip 48.2 kB 48.2 kB
app-route-tu...dev.js gzip 69.1 kB 69 kB
app-route-tu..prod.js gzip 48 kB 47.9 kB
app-route.ru...dev.js gzip 69 kB 68.9 kB
app-route.ru..prod.js gzip 48 kB 47.9 kB
dist_client_...dev.js gzip 324 B 324 B
dist_client_...dev.js gzip 326 B 326 B
dist_client_...dev.js gzip 318 B 318 B
dist_client_...dev.js gzip 317 B 317 B
pages-api-tu...dev.js gzip 42.5 kB 42.4 kB
pages-api-tu..prod.js gzip 32.3 kB 32.2 kB
pages-api.ru...dev.js gzip 42.5 kB 42.4 kB
pages-api.ru..prod.js gzip 32.3 kB 32.2 kB
pages-turbo....dev.js gzip 51.8 kB 51.7 kB
pages-turbo...prod.js gzip 38.8 kB 38.8 kB
pages.runtim...dev.js gzip 51.8 kB 51.7 kB
pages.runtim..prod.js gzip 38.8 kB 38.8 kB
server.runti..prod.js gzip 62.3 kB 62.3 kB
Total 2.73 MB 2.73 MB ✅ -1.69 kB
📝 Changed Files (24 files)

Files with changes:

  • app-page-exp..ntime.dev.js
  • app-page-exp..time.prod.js
  • app-page-tur..ntime.dev.js
  • app-page-tur..time.prod.js
  • app-page-tur..ntime.dev.js
  • app-page-tur..time.prod.js
  • app-page.runtime.dev.js
  • app-page.runtime.prod.js
  • app-route-ex..ntime.dev.js
  • app-route-ex..time.prod.js
  • app-route-tu..ntime.dev.js
  • app-route-tu..time.prod.js
  • app-route-tu..ntime.dev.js
  • app-route-tu..time.prod.js
  • app-route.runtime.dev.js
  • app-route.ru..time.prod.js
  • pages-api-tu..ntime.dev.js
  • pages-api-tu..time.prod.js
  • pages-api.runtime.dev.js
  • pages-api.ru..time.prod.js
  • ... and 4 more
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config.deploymentId || process.env.NEXT_DEPLOYMENT_ID
)
const staticEnv = getStaticEnv(config, deploymentId)
const staticEnv = getStaticEnv(config, config.deploymentId)
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Suggested change
const staticEnv = getStaticEnv(config, config.deploymentId)
const staticEnv = getStaticEnv(config, config.deploymentId || '')

TypeScript type error: config.deploymentId (string | undefined) passed to getStaticEnv which expects deploymentId: string parameter

Fix on Vercel

dev: false,
deploymentId: evaluateDeploymentId(config.deploymentId),
runtimeServerDeploymentId: config.experimental.runtimeServerDeploymentId,
deploymentId: config.deploymentId,
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Suggested change
deploymentId: config.deploymentId,
deploymentId: config.deploymentId || '',

TypeScript type error: TurbopackManifestLoader expects deploymentId: string, but config.deploymentId is string | undefined

Fix on Vercel

worker.exportPages({
buildId,
deploymentId: evaluateDeploymentId(nextConfig.deploymentId) || '',
deploymentId: nextConfig.deploymentId,
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Suggested change
deploymentId: nextConfig.deploymentId,
deploymentId: nextConfig.deploymentId || '',

Missing null coalescing operator causes type error: deploymentId is passed as nextConfig.deploymentId (type string | undefined) to a function expecting string

Fix on Vercel

deploymentId: evaluateDeploymentId(nextConfig.deploymentId),
runtimeServerDeploymentId:
nextConfig.experimental.runtimeServerDeploymentId,
deploymentId: nextConfig.deploymentId,
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Suggested change
deploymentId: nextConfig.deploymentId,
deploymentId: nextConfig.deploymentId || '',

TypeScript type error: TurbopackManifestLoader expects deploymentId: string, but nextConfig.deploymentId is string | undefined

Fix on Vercel

// need to populate in normal runtime env
if (isCompileMode || isGenerateMode) {
populateStaticEnv(config, config.deploymentId || '')
populateStaticEnv(config, config.deploymentId)
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Suggested change
populateStaticEnv(config, config.deploymentId)
populateStaticEnv(config, config.deploymentId || '')

TypeScript type error: populateStaticEnv function expects deploymentId: string parameter, but config.deploymentId is string | undefined

Fix on Vercel

buildId,
locales: config.i18n?.locales,
deploymentId: evaluateDeploymentId(config.deploymentId),
deploymentId: config.deploymentId,
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Suggested change
deploymentId: config.deploymentId,
deploymentId: config.deploymentId || '',

TypeScript type error: writeClientSsgManifest requires deploymentId: string parameter, but config.deploymentId is string | undefined causing type mismatch

Fix on Vercel

buildId,
dev,
deploymentId: evaluateDeploymentId(config.deploymentId),
deploymentId: config.deploymentId,
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Suggested change
deploymentId: config.deploymentId,
deploymentId: config.deploymentId || '',

TypeScript type error: BuildManifestPlugin expects deploymentId: string but config.deploymentId is string | undefined, causing potential type incompatibility

Fix on Vercel

@eps1lon eps1lon merged commit b08e16b into canary Jan 23, 2026
288 of 291 checks passed
@eps1lon eps1lon deleted the revert-88496-revert-88449-revert-88012-brooke/addAutomaticDeploymentId branch January 23, 2026 11:22
@github-actions github-actions bot added the locked label Feb 6, 2026
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