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Informations about the package next-cache-doctor

Next cache doctor

Next cache doctor reads a Next.js project on disk and reports which cache layers can still serve an old page after a write.

A database update, revalidateTag(), and a fresh server do not guarantee a fresh screen. The data cache, the full route cache, the client router cache, and a CDN can each keep their own copy. This package names the layer that was left behind.

It is a library and a command. It does not start Next.js, call Redis, or purge a CDN. The command finishes and exits, so a process manager such as PM2 is not part of the setup.

Current release: 0.2.5. Each release commit on main is an annotated git tag, v0.2.5, and an entry in CHANGELOG.md.

The unscoped npm name next-cache-doctor is taken by another package. Node installs use the scoped names below.

Install

Node.js 18 or newer.

npm / pnpm / yarn (recommended for Next.js)

JSR

Composer (Packagist)

Composer installs the files. Node runs them.

Use it from code

run(directory) returns { root, fileCount, layers, findings }. render(result) returns the text report. The package has no dependencies.

Use it from the shell

directory defaults to the current working directory. --json prints the same object run() returns. --fail-on-high exits 1 when any finding is high. Exit 2 means the path was refused or could not be read.

Example:

What a high finding means

Id What is wrong
tag-invalidation-leaves-router-cache revalidateTag ran, and the project never calls updateTag or router.refresh(). The browser can keep the old Server Component payload.
standalone-without-shared-cache output: "standalone" with cached data and no cacheHandler. Another instance can keep serving the tag you just invalidated.
revalidate-tag-max-with-use-cache revalidateTag(..., "max") appears in a project that also uses "use cache". That combination has failed production Server Actions with HTTP 500.

Medium and low findings are in docs/usage.md.

What the scan will not open

The file is read as text. It is not executed. A path that resolves outside the directory you passed is dropped.

Develop

pnpm test and yarn test run the same node --test script. There is no install step, because the package has no dependencies.

Releases

Versions follow semantic versioning. The git tag and package.json use the same number. History is in CHANGELOG.md.

Report a vulnerability through GitHub private security reporting, described in SECURITY.md.

License

MIT. Copyright 2026 Adesh Suryan. See LICENSE.

All versions of next-cache-doctor with dependencies

PHP Build Version
Package Version
Requires php Version >=8.1
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