diff --git a/.changeset/early-taxis-carry.md b/.changeset/early-taxis-carry.md
new file mode 100644
index 0000000000..7baae3b747
--- /dev/null
+++ b/.changeset/early-taxis-carry.md
@@ -0,0 +1,6 @@
+---
+"@pnpm/exportable-manifest": minor
+"pnpm": minor
+---
+
+Add support for a hook called `beforePacking` that can be used to customize the `package.json` contents at publish time [#3816](https://github.com/pnpm/pnpm/issues/3816).
diff --git a/.editorconfig b/.editorconfig
index 270dd84bb6..a74160f255 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -6,6 +6,6 @@ charset = utf-8
 trim_trailing_whitespace = true
 end_of_line = lf
 
-[*.{ts,js,json}]
+[*.{ts,js,cjs,json}]
 indent_style = space
 indent_size = 2
diff --git a/hooks/pnpmfile/src/Hooks.ts b/hooks/pnpmfile/src/Hooks.ts
index 408eb0b3ea..b1b0de4564 100644
--- a/hooks/pnpmfile/src/Hooks.ts
+++ b/hooks/pnpmfile/src/Hooks.ts
@@ -11,6 +11,8 @@ export interface HookContext {
 export interface Hooks {
   // eslint-disable-next-line @typescript-eslint/no-explicit-any -- Flexible hook signature for any package manifest
   readPackage?: (pkg: any, context: HookContext) => any
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any -- Flexible hook signature for any package manifest
+  beforePacking?: (pkg: any, dir: string, context: HookContext) => any
   preResolution?: PreResolutionHook
   afterAllResolved?: (lockfile: LockfileObject, context: HookContext) => LockfileObject | Promise<LockfileObject>
   filterLog?: (log: Log) => boolean
diff --git a/hooks/pnpmfile/src/requireHooks.ts b/hooks/pnpmfile/src/requireHooks.ts
index 356bed05cd..890dd54d89 100644
--- a/hooks/pnpmfile/src/requireHooks.ts
+++ b/hooks/pnpmfile/src/requireHooks.ts
@@ -5,7 +5,7 @@ import { createHashFromMultipleFiles } from '@pnpm/crypto.hash'
 import pathAbsolute from 'path-absolute'
 import type { CustomFetchers } from '@pnpm/fetcher-base'
 import { type ImportIndexedPackageAsync } from '@pnpm/store-controller-types'
-import { type ReadPackageHook, type BaseManifest } from '@pnpm/types'
+import { type ReadPackageHook, type BeforePackingHook, type BaseManifest } from '@pnpm/types'
 import { type LockfileObject } from '@pnpm/lockfile.types'
 import { requirePnpmfile, type Pnpmfile, type Finders } from './requirePnpmfile.js'
 import { type Hooks, type HookContext } from './Hooks.js'
@@ -34,6 +34,7 @@ interface PnpmfileEntryLoaded {
 
 export interface CookedHooks {
   readPackage?: ReadPackageHook[]
+  beforePacking?: BeforePackingHook[]
   preResolution?: Array<(ctx: PreResolutionHookContext) => Promise<void>>
   afterAllResolved?: Array<(lockfile: LockfileObject) => LockfileObject | Promise<LockfileObject>>
   filterLog?: Array<Cook<Required<Hooks>['filterLog']>>
@@ -104,8 +105,9 @@ export async function requireHooks (
   }))
 
   const mergedFinders: Finders = {}
-  const cookedHooks: CookedHooks & Required<Pick<CookedHooks, 'readPackage' | 'preResolution' | 'afterAllResolved' | 'filterLog' | 'updateConfig'>> = {
+  const cookedHooks: CookedHooks & Required<Pick<CookedHooks, 'readPackage' | 'beforePacking' | 'preResolution' | 'afterAllResolved' | 'filterLog' | 'updateConfig'>> = {
     readPackage: [],
+    beforePacking: [],
     preResolution: [],
     afterAllResolved: [],
     filterLog: [],
@@ -154,6 +156,13 @@ export async function requireHooks (
       cookedHooks.readPackage.push(<Pkg extends BaseManifest>(pkg: Pkg, _dir?: string) => fn(pkg, context))
     }
 
+    // beforePacking
+    if (fileHooks.beforePacking) {
+      const fn = fileHooks.beforePacking
+      const context = createReadPackageHookContext(file, prefix, 'beforePacking')
+      cookedHooks.beforePacking.push(<Pkg extends BaseManifest>(pkg: Pkg, dir: string) => fn(pkg, dir, context))
+    }
+
     // afterAllResolved
     if (fileHooks.afterAllResolved) {
       const fn = fileHooks.afterAllResolved
diff --git a/hooks/pnpmfile/src/requirePnpmfile.ts b/hooks/pnpmfile/src/requirePnpmfile.ts
index decd8da56e..0e8752f5bf 100644
--- a/hooks/pnpmfile/src/requirePnpmfile.ts
+++ b/hooks/pnpmfile/src/requirePnpmfile.ts
@@ -82,6 +82,9 @@ export async function requirePnpmfile (pnpmFilePath: string, prefix: string): Pr
         }
         return newPkg
       }
+      if (pnpmfile?.hooks?.beforePacking && typeof pnpmfile.hooks.beforePacking !== 'function') {
+        throw new TypeError('hooks.beforePacking should be a function')
+      }
     }
     return { pnpmfileModule: pnpmfile }
   } catch (err: unknown) {
diff --git a/packages/types/src/options.ts b/packages/types/src/options.ts
index 443bb4b231..2571b8ac26 100644
--- a/packages/types/src/options.ts
+++ b/packages/types/src/options.ts
@@ -15,6 +15,8 @@ export type IncludedDependencies = {
 
 export type ReadPackageHook = <Pkg extends BaseManifest> (pkg: Pkg, dir?: string) => Pkg | Promise<Pkg>
 
+export type BeforePackingHook = <Pkg extends BaseManifest> (pkg: Pkg, dir: string) => Pkg | Promise<Pkg>
+
 export interface FinderContext {
   alias: string
   name: string
diff --git a/pkg-manifest/exportable-manifest/package.json b/pkg-manifest/exportable-manifest/package.json
index 51f65bcc0a..3969b82797 100644
--- a/pkg-manifest/exportable-manifest/package.json
+++ b/pkg-manifest/exportable-manifest/package.json
@@ -43,6 +43,7 @@
     "@pnpm/catalogs.config": "workspace:*",
     "@pnpm/catalogs.types": "workspace:*",
     "@pnpm/exportable-manifest": "workspace:*",
+    "@pnpm/pnpmfile": "workspace:*",
     "@pnpm/prepare": "workspace:*",
     "@types/cross-spawn": "catalog:",
     "@types/ramda": "catalog:",
diff --git a/pkg-manifest/exportable-manifest/src/index.ts b/pkg-manifest/exportable-manifest/src/index.ts
index 528e33a9c7..ebd8681a26 100644
--- a/pkg-manifest/exportable-manifest/src/index.ts
+++ b/pkg-manifest/exportable-manifest/src/index.ts
@@ -4,6 +4,7 @@ import { type Catalogs } from '@pnpm/catalogs.types'
 import { PnpmError } from '@pnpm/error'
 import { parseJsrSpecifier } from '@pnpm/resolving.jsr-specifier-parser'
 import { tryReadProjectManifest } from '@pnpm/read-project-manifest'
+import { type Hooks } from '@pnpm/pnpmfile'
 import { type Dependencies, type ProjectManifest } from '@pnpm/types'
 import { omit } from 'ramda'
 import pMapValues from 'p-map-values'
@@ -20,6 +21,7 @@ const PREPUBLISH_SCRIPTS = [
 
 export interface MakePublishManifestOptions {
   catalogs: Catalogs
+  hooks?: Hooks
   modulesDir?: string
   readmeFile?: string
 }
@@ -29,7 +31,7 @@ export async function createExportableManifest (
   originalManifest: ProjectManifest,
   opts: MakePublishManifestOptions
 ): Promise<ProjectManifest> {
-  const publishManifest: ProjectManifest = omit(['pnpm', 'scripts', 'packageManager'], originalManifest)
+  let publishManifest: ProjectManifest = omit(['pnpm', 'scripts', 'packageManager'], originalManifest)
   if (originalManifest.scripts != null) {
     publishManifest.scripts = omit(PREPUBLISH_SCRIPTS, originalManifest.scripts)
   }
@@ -63,6 +65,11 @@ export async function createExportableManifest (
     publishManifest.readme ??= opts.readmeFile
   }
 
+  for (const hook of opts?.hooks?.beforePacking ?? []) {
+    // eslint-disable-next-line no-await-in-loop
+    publishManifest = await hook(publishManifest, dir) ?? publishManifest
+  }
+
   return publishManifest
 }
 
diff --git a/pkg-manifest/exportable-manifest/test/beforePackingHook.test.ts b/pkg-manifest/exportable-manifest/test/beforePackingHook.test.ts
new file mode 100644
index 0000000000..c0c8048012
--- /dev/null
+++ b/pkg-manifest/exportable-manifest/test/beforePackingHook.test.ts
@@ -0,0 +1,101 @@
+import fs from 'fs'
+import { createExportableManifest, type MakePublishManifestOptions } from '@pnpm/exportable-manifest'
+import { requireHooks } from '@pnpm/pnpmfile'
+import { prepare } from '@pnpm/prepare'
+import { sync as writeYamlFile } from 'write-yaml-file'
+
+const defaultOpts: MakePublishManifestOptions = {
+  catalogs: {},
+}
+
+test('basic test', async () => {
+  prepare()
+
+  fs.writeFileSync('.pnpmfile.cjs', `
+module.exports = {
+  hooks: {
+    beforePacking: (pkg, dir, context) => {
+      context.log(dir)
+      pkg.foo = 'bar'
+      return pkg // return optional
+    },
+  },
+}`, 'utf8')
+
+  const { hooks } = await requireHooks(process.cwd(), { tryLoadDefaultPnpmfile: true })
+  expect(await createExportableManifest(process.cwd(), {
+    name: 'foo',
+    version: '1.0.0',
+    dependencies: {
+      qar: '2',
+    },
+  }, { ...defaultOpts, hooks })).toStrictEqual({
+    name: 'foo',
+    version: '1.0.0',
+    dependencies: {
+      qar: '2',
+    },
+    foo: 'bar',
+  })
+})
+
+test('hook returns new manifest', async () => {
+  prepare()
+
+  fs.writeFileSync('.pnpmfile.cjs', `
+module.exports = {
+  hooks: {
+    beforePacking: (pkg) => {
+      return { type: 'module' }
+    },
+  },
+}`, 'utf8')
+
+  const { hooks } = await requireHooks(process.cwd(), { tryLoadDefaultPnpmfile: true })
+  expect(await createExportableManifest(process.cwd(), {
+    name: 'foo',
+    version: '1.0.0',
+  }, { ...defaultOpts, hooks })).toStrictEqual({
+    type: 'module',
+  })
+})
+
+test('hook in multiple pnpmfiles', async () => {
+  prepare()
+
+  const pnpmfiles = ['pnpmfile1.cjs', 'pnpmfile2.cjs']
+  fs.writeFileSync(pnpmfiles[0], `
+module.exports = {
+  hooks: {
+    beforePacking: (pkg) => {
+      pkg.foo = 'foo'
+    },
+  },
+}`, 'utf8')
+  fs.writeFileSync(pnpmfiles[1], `
+module.exports = {
+  hooks: {
+    beforePacking: (pkg) => {
+      pkg.bar = 'bar'
+    },
+  },
+}`, 'utf8')
+  writeYamlFile('pnpm-workspace.yaml', { pnpmfile: pnpmfiles })
+
+  const { hooks } = await requireHooks(process.cwd(), { pnpmfiles })
+  expect(await createExportableManifest(process.cwd(), {
+    name: 'foo',
+    version: '1.0.0',
+    dependencies: {
+      qar: '2',
+    },
+  }, { ...defaultOpts, hooks })).toStrictEqual({
+    name: 'foo',
+    version: '1.0.0',
+    dependencies: {
+      qar: '2',
+    },
+    foo: 'foo',
+    bar: 'bar',
+  })
+})
diff --git a/pkg-manifest/exportable-manifest/tsconfig.json b/pkg-manifest/exportable-manifest/tsconfig.json
index fef35b586d..7cc738bdf2 100644
--- a/pkg-manifest/exportable-manifest/tsconfig.json
+++ b/pkg-manifest/exportable-manifest/tsconfig.json
@@ -21,6 +21,9 @@
     {
       "path": "../../catalogs/types"
     },
+    {
+      "path": "../../hooks/pnpmfile"
+    },
     {
       "path": "../../packages/error"
     },
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 85343ff35a..9855e5a356 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -6381,6 +6381,9 @@ importers:
       '@pnpm/exportable-manifest':
         specifier: workspace:*
         version: 'link:'
+      '@pnpm/pnpmfile':
+        specifier: workspace:*
+        version: link:../../hooks/pnpmfile
       '@pnpm/prepare':
         specifier: workspace:*
         version: link:../../__utils__/prepare
@@ -7155,6 +7158,9 @@ importers:
       '@pnpm/plugin-commands-publishing':
         specifier: workspace:*
         version: 'link:'
+      '@pnpm/pnpmfile':
+        specifier: workspace:*
+        version: link:../../hooks/pnpmfile
       '@pnpm/prepare':
         specifier: workspace:*
         version: link:../../__utils__/prepare
diff --git a/releasing/plugin-commands-publishing/package.json b/releasing/plugin-commands-publishing/package.json
index 8d85eccdb0..6d6c318b2b 100644
--- a/releasing/plugin-commands-publishing/package.json
+++ b/releasing/plugin-commands-publishing/package.json
@@ -75,6 +75,7 @@
     "@pnpm/catalogs.config": "workspace:*",
     "@pnpm/logger": "workspace:*",
     "@pnpm/plugin-commands-publishing": "workspace:*",
+    "@pnpm/pnpmfile": "workspace:*",
     "@pnpm/prepare": "workspace:*",
     "@pnpm/registry-mock": "catalog:",
     "@pnpm/test-ipc-server": "workspace:*",
diff --git a/releasing/plugin-commands-publishing/src/pack.ts b/releasing/plugin-commands-publishing/src/pack.ts
index 82c6d55cd3..0429a7c01c 100644
--- a/releasing/plugin-commands-publishing/src/pack.ts
+++ b/releasing/plugin-commands-publishing/src/pack.ts
@@ -8,6 +8,7 @@ import { readProjectManifest } from '@pnpm/cli-utils'
 import { createExportableManifest } from '@pnpm/exportable-manifest'
 import { packlist } from '@pnpm/fs.packlist'
 import { getBinsFromPackageManifest } from '@pnpm/package-bins'
+import { type Hooks } from '@pnpm/pnpmfile'
 import { type ProjectManifest, type Project, type ProjectRootDir, type ProjectsGraph, type DependencyManifest } from '@pnpm/types'
 import { glob } from 'tinyglobby'
 import { pick } from 'ramda'
@@ -98,6 +99,7 @@ export type PackOptions = Pick<UniversalOptions, 'dir'> & Pick<Config, 'catalogs
 | 'nodeLinker'
 > & Partial<Pick<Config, 'extraBinPaths'
 | 'extraEnv'
+| 'hooks'
 | 'recursive'
 | 'selectedProjectsGraph'
 | 'workspaceConcurrency'
@@ -239,6 +241,7 @@ export async function api (opts: PackOptions): Promise<PackResult> {
     manifest,
     embedReadme: opts.embedReadme,
     catalogs: opts.catalogs ?? {},
+    hooks: opts.hooks,
   })
   const files = await packlist(dir, {
     packageJsonCache: {
@@ -355,11 +358,13 @@ async function createPublishManifest (opts: {
   modulesDir: string
   manifest: ProjectManifest
   catalogs: Catalogs
+  hooks?: Hooks
 }): Promise<ProjectManifest> {
-  const { projectDir, embedReadme, modulesDir, manifest, catalogs } = opts
+  const { projectDir, embedReadme, modulesDir, manifest, catalogs, hooks } = opts
   const readmeFile = embedReadme ? await readReadmeFile(projectDir) : undefined
   return createExportableManifest(projectDir, manifest, {
     catalogs,
+    hooks,
     readmeFile,
     modulesDir,
   })
diff --git a/releasing/plugin-commands-publishing/tsconfig.json b/releasing/plugin-commands-publishing/tsconfig.json
index 30d9869fc4..dbe17b2350 100644
--- a/releasing/plugin-commands-publishing/tsconfig.json
+++ b/releasing/plugin-commands-publishing/tsconfig.json
@@ -45,6 +45,9 @@
     {
       "path": "../../fs/packlist"
     },
+    {
+      "path": "../../hooks/pnpmfile"
+    },
     {
       "path": "../../network/auth-header"
     },