Move preview props into separate manifest by mischnic · Pull Request #89839 · vercel/next.js

mischnic · 2026-02-11T15:45:26Z

Store/load the encryption keys at .next/server/preview-props.json (which are always needed)
Then we can have the route-specific stuff in per-route prerender-manifest.json: #89829

mischnic · 2026-02-11T15:45:46Z

Per-route prerender-manifest.json #89829
Move preview props into separate manifest #89839 👈 (View in Graphite)
Refactor prerenderManifest passing #89765
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nextjs-bot · 2026-02-11T15:50:59Z

Failing test suites

Commit: b62b232 | About building and testing Next.js

pnpm test test/integration/broken-webpack-plugin/test/index.test.ts (job)

Handles a broken webpack plugin (precompile) > should render error correctly (DD)

Expand output

● Handles a broken webpack plugin (precompile) › should render error correctly

FetchError: request to http://localhost:35657/ failed, reason: socket hang up

  at ClientRequest.<anonymous> (../node_modules/.pnpm/node-fetch@2.6.7_encoding@0.1.13/node_modules/node-fetch/lib/index.js:1491:11)

vercel

Additional Suggestions:

Tests read .preview.previewModeId from prerender-manifest.json, but the preview field was moved to a separate preview-props.json file, causing "Cannot read properties of undefined" errors.

Test reads .preview from prerender-manifest.json but the preview field was moved to a separate preview-props.json file, causing the test to fail with undefined.

Middleware tests read .preview.previewModeId from prerender-manifest.json, but the preview field was moved to a separate preview-props.json file, causing "Cannot read properties of undefined" errors.

nextjs-bot · 2026-02-11T16:13:33Z

Stats from current PR

🔴 1 regression

Metric	Canary	PR	Change	Trend
node_modules Size	467 MB	467 MB	🔴 +47.3 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	456ms	✓	▁▁▁▁▁
Cold (Ready in log)	440ms	442ms	✓	▁▆▅▂▆
Cold (First Request)	803ms	809ms	✓	▁██▁█
Warm (Listen)	456ms	456ms	✓	▁▁▁▁▁
Warm (Ready in log)	440ms	442ms	✓	▁▁▁▂▁
Warm (First Request)	337ms	336ms	✓	▁▁▆▅▅

📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric	Canary	PR	Change	Trend
Cold (Listen)	455ms	454ms	✓	▁▁▁▅▁
Cold (Ready in log)	438ms	438ms	✓	▄▃▄▅▃
Cold (First Request)	1.843s	1.872s	✓	▂▂▃▆▁
Warm (Listen)	456ms	456ms	✓	▁▁▁▅▁
Warm (Ready in log)	437ms	438ms	✓	▃▃▃▅▃
Warm (First Request)	1.871s	1.884s	✓	▂▂▃▅▂

⚡ Production Builds

Metric	Canary	PR	Change	Trend
Fresh Build	3.955s	3.964s	✓	▁▁▁▃▁
Cached Build	3.973s	3.963s	✓	▁▁▁▃▁

📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric	Canary	PR	Change	Trend
Fresh Build	13.868s	13.912s	✓	▁▂▃▅▁
Cached Build	13.990s	14.016s	✓	▁▂▃▅▁
node_modules Size	467 MB	467 MB	🔴 +47.3 kB (+0%)	▁▁▁▁▁

📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **437 kB** → **437 kB** ⚠️ +20 B

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

Server

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	758 B	761 B	✓
Total	758 B	761 B	⚠️ +3 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	451 B	452 B	✓
Total	451 B	452 B	⚠️ +1 B

📦 Webpack

Client

Main Bundles

	Canary	PR	Change
5528-HASH.js gzip	5.47 kB	N/A	-
6280-HASH.js gzip	57 kB	N/A	-
6335.HASH.js gzip	169 B	N/A	-
912-HASH.js gzip	4.53 kB	N/A	-
e8aec2e4-HASH.js gzip	62.5 kB	N/A	-
framework-HASH.js gzip	59.7 kB	59.7 kB	✓
main-app-HASH.js gzip	256 B	254 B	✓
main-HASH.js gzip	39.1 kB	39.1 kB	✓
webpack-HASH.js gzip	1.68 kB	1.68 kB	✓
262-HASH.js gzip	N/A	4.53 kB	-
2889.HASH.js gzip	N/A	169 B	-
5602-HASH.js gzip	N/A	5.49 kB	-
6948ada0-HASH.js gzip	N/A	62.5 kB	-
9544-HASH.js gzip	N/A	57.7 kB	-
Total	230 kB	231 kB	⚠️ +654 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	194 B	✓
_error-HASH.js gzip	183 B	180 B	🟢 3 B (-2%)
css-HASH.js gzip	331 B	330 B	✓
dynamic-HASH.js gzip	1.81 kB	1.81 kB	✓
edge-ssr-HASH.js gzip	256 B	256 B	✓
head-HASH.js gzip	351 B	352 B	✓
hooks-HASH.js gzip	384 B	383 B	✓
image-HASH.js gzip	580 B	581 B	✓
index-HASH.js gzip	260 B	260 B	✓
link-HASH.js gzip	2.49 kB	2.49 kB	✓
routerDirect..HASH.js gzip	320 B	319 B	✓
script-HASH.js gzip	386 B	386 B	✓
withRouter-HASH.js gzip	315 B	315 B	✓
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Total	7.97 kB	7.97 kB	✅ -1 B

Server

Edge SSR

	Canary	PR	Change
edge-ssr.js gzip	126 kB	126 kB	✓
page.js gzip	249 kB	250 kB	✓
Total	375 kB	376 kB	⚠️ +337 B

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	614 B	613 B	✓
middleware-r..fest.js gzip	156 B	155 B	✓
middleware.js gzip	33.1 kB	33 kB	✓
edge-runtime..pack.js gzip	842 B	842 B	✓
Total	34.7 kB	34.6 kB	✅ -107 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	733 B	735 B	✓
Total	733 B	735 B	⚠️ +2 B

Build Cache

	Canary	PR	Change
0.pack gzip	3.84 MB	3.85 MB	🔴 +8.09 kB (+0%)
index.pack gzip	103 kB	103 kB	✓
index.pack.old gzip	103 kB	104 kB	🔴 +1.17 kB (+1%)
Total	4.05 MB	4.06 MB	⚠️ +8.73 kB

🔄 Shared (bundler-independent)

Runtimes

	Canary	PR	Change
app-page-exp...dev.js gzip	316 kB	316 kB	✓
app-page-exp..prod.js gzip	168 kB	168 kB	✓
app-page-tur...dev.js gzip	315 kB	315 kB	✓
app-page-tur..prod.js gzip	167 kB	167 kB	✓
app-page-tur...dev.js gzip	312 kB	312 kB	✓
app-page-tur..prod.js gzip	166 kB	166 kB	✓
app-page.run...dev.js gzip	312 kB	312 kB	✓
app-page.run..prod.js gzip	166 kB	166 kB	✓
app-route-ex...dev.js gzip	70.5 kB	70.4 kB	✓
app-route-ex..prod.js gzip	49 kB	49 kB	✓
app-route-tu...dev.js gzip	70.5 kB	70.5 kB	✓
app-route-tu..prod.js gzip	49 kB	49 kB	✓
app-route-tu...dev.js gzip	70.1 kB	70 kB	✓
app-route-tu..prod.js gzip	48.8 kB	48.8 kB	✓
app-route.ru...dev.js gzip	70.1 kB	70 kB	✓
app-route.ru..prod.js gzip	48.8 kB	48.8 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	43.2 kB	43.1 kB	✓
pages-api-tu..prod.js gzip	32.9 kB	32.9 kB	✓
pages-api.ru...dev.js gzip	43.2 kB	43.1 kB	✓
pages-api.ru..prod.js gzip	32.8 kB	32.9 kB	✓
pages-turbo....dev.js gzip	52.5 kB	52.4 kB	✓
pages-turbo...prod.js gzip	39.4 kB	39.4 kB	✓
pages.runtim...dev.js gzip	52.5 kB	52.4 kB	✓
pages.runtim..prod.js gzip	39.4 kB	39.4 kB	✓
server.runti..prod.js gzip	62.7 kB	62.7 kB	✓
Total	2.8 MB	2.8 MB	✅ -695 B

📝 Changed Files (25 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 5 more

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nextjs-bot added created-by: Turbopack team PRs by the Turbopack team. type: next labels Feb 11, 2026

mischnic mentioned this pull request Feb 11, 2026

Refactor prerenderManifest passing #89765

Merged

mischnic mentioned this pull request Feb 11, 2026

Per-route prerender-manifest.json #89829

Draft

1 task

mischnic marked this pull request as ready for review February 11, 2026 15:46

mischnic requested a review from ijjk February 11, 2026 15:50

vercel bot reviewed Feb 11, 2026

View reviewed changes

Base automatically changed from mischnic/prerenderpreview to canary February 11, 2026 16:34

mischnic force-pushed the mischnic/preview-props-separate-manifest branch from 5f7c115 to fc18b38 Compare February 11, 2026 18:20

nextjs-bot added the tests label Feb 11, 2026

mischnic force-pushed the mischnic/preview-props-separate-manifest branch from fc18b38 to 605df46 Compare February 11, 2026 18:44

mischnic added 4 commits February 12, 2026 19:18

Move preview props into separate manifest

63adbf3

fix dev

e24bca3

fixup

b668d1d

fixup

824f604

mischnic force-pushed the mischnic/preview-props-separate-manifest branch from 605df46 to 76c95a7 Compare February 12, 2026 18:18

move to .next/server/preview-props.json

b62b232

mischnic force-pushed the mischnic/preview-props-separate-manifest branch from 76c95a7 to b62b232 Compare February 12, 2026 18:21

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Move preview props into separate manifest#89839

Move preview props into separate manifest#89839
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