vercel/next.js · Architecture

A static read of how vercel/next.js is wired together — module coupling, layering, and circular dependencies — derived from its import graph.

Architecture Security & risks Dependencies License Maintenance Alternatives Vs Full analysis

Architecture grade

score 66/100

Import cycles

lower is better

361

Modules parsed

360 edges

91%

Layeredness

clean-layer ratio

Most-depended-on modules

These are the highest-fan-in files — change them and the blast radius is largest. Read them first.

packages/next/src/bundles/webpack/packages/webpack.js19 importers · radius 19
packages/next/src/client/components/router-reducer/router-reducer-types.ts18 importers · radius 42
packages/next/src/client/components/segment-cache/cache.ts16 importers · radius 42
packages/next/src/client/components/segment-cache/cache-key.ts12 importers · radius 43
packages/next/src/client/components/render-tree.ts11 importers · radius 42
packages/next/src/client/components/segment-cache/cache-map.ts10 importers · radius 42
packages/next/src/client/components/segment-cache/types.ts10 importers · radius 43
packages/next/src/client/components/segment-cache/bfcache.ts9 importers · radius 42

Modules (16)

Source directories grouped from the import graph. Each links to a per-module page with its files and how it couples to the rest.

packages/next/src/client/components48 files · 124 in-degree · in cycle
packages/next/src/client/components/segment-cache13 files · 96 in-degree · in cycle
packages/next/src/client/components/router-reducer9 files · 44 in-degree · in cycle
packages/next/src/client14 files · 25 in-degree
packages/next/src/bundles/webpack/packages20 files · 19 in-degree
packages/next/src/client/components/router-reducer/reducers9 files · 15 in-degree · in cycle
packages/next/src/client/components/http-access-fallback3 files · 11 in-degree
packages/next/src/client/components/builtin8 files · 4 in-degree
packages/next/src/build/swc2 files · 4 in-degree
packages/next/src/build3 files · 3 in-degree
packages/next/src/client/components/errors2 files · 2 in-degree
packages/next/src/client/components/instant-validation2 files · 2 in-degree
packages/next/src/client/app-dir3 files · 1 in-degree
packages/next/src/bundles/cssnano-simple2 files · 1 in-degree
packages/next/src/cli9 files · 0 in-degree
packages/next/src/api3 files · 0 in-degree

Circular dependencies (8)

packages/next/src/client/components/segment-cache/cache.ts to packages/next/src/client/components/router-reducer/fetch-server-response.ts to packages/next/src/client/components/segment-cache/fetch.ts to packages/next/src/client/components/segment-cache/navigation-testing-lock.ts to packages/next/src/client/components/use-action-queue.ts to packages/next/src/client/components/app-router-instance.ts to packages/next/src/client/components/router-reducer/router-reducer-types.ts to packages/next/src/client/components/segment-cache/decode-server-response.ts to packages/next/src/client/components/segment-cache/vary-path.ts to packages/next/src/client/components/segment-cache/cache.ts
packages/next/src/client/components/segment-cache/vary-path.ts to packages/next/src/client/components/segment-cache/cache-map.ts to packages/next/src/client/components/segment-cache/vary-path.ts
packages/next/src/client/components/segment-cache/cache-map.ts to packages/next/src/client/components/segment-cache/lru.ts to packages/next/src/client/components/segment-cache/cache-map.ts
packages/next/src/client/components/segment-cache/scheduler.ts to packages/next/src/client/components/segment-cache/cache.ts to packages/next/src/client/components/router-reducer/fetch-server-response.ts to packages/next/src/client/components/segment-cache/fetch.ts to packages/next/src/client/components/segment-cache/navigation-testing-lock.ts to packages/next/src/client/components/use-action-queue.ts to packages/next/src/client/components/app-router-instance.ts to packages/next/src/client/components/router-reducer/router-reducer-types.ts to packages/next/src/client/components/segment-cache/decode-server-response.ts to packages/next/src/client/components/segment-cache/vary-path.ts to packages/next/src/client/components/segment-cache/cache-map.ts to packages/next/src/client/components/segment-cache/lru.ts to packages/next/src/client/components/segment-cache/scheduler.ts
packages/next/src/client/components/segment-cache/cache.ts to packages/next/src/client/components/router-reducer/fetch-server-response.ts to packages/next/src/client/components/segment-cache/fetch.ts to packages/next/src/client/components/segment-cache/navigation-testing-lock.ts to packages/next/src/client/components/use-action-queue.ts to packages/next/src/client/components/app-router-instance.ts to packages/next/src/client/components/router-reducer/router-reducer-types.ts to packages/next/src/client/components/segment-cache/decode-server-response.ts to packages/next/src/client/components/segment-cache/cache.ts
packages/next/src/client/components/router-reducer/router-reducer-types.ts to packages/next/src/client/components/segment-cache/decode-server-response.ts to packages/next/src/client/components/segment-cache/bfcache.ts to packages/next/src/client/components/router-reducer/reducers/navigate-reducer.ts to packages/next/src/client/components/router-reducer/router-reducer-types.ts

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