diff --git a/hooks/types/src/index.ts b/hooks/types/src/index.ts
index 7be5e6d5dc..49d0a645a4 100644
--- a/hooks/types/src/index.ts
+++ b/hooks/types/src/index.ts
@@ -69,9 +69,10 @@ export interface CustomResolver {
    * Use this to implement custom cache invalidation logic (e.g., time-based expiry, version checks).
    *
    * @param wantedDependency - The dependency to check for force re-resolution
+   * @param wantedLockfile - The current lockfile contents
    * @returns true to force re-resolution of all dependencies
    */
-  shouldForceResolve?: (wantedDependency: WantedDependency) => boolean | Promise<boolean>
+  shouldForceResolve?: (wantedDependency: WantedDependency, wantedLockfile: LockfileObject) => boolean | Promise<boolean>
 }
 
 export interface CustomFetcher {
diff --git a/pkg-manager/core/README.md b/pkg-manager/core/README.md
index 687466fd6b..d0b68eb9ba 100644
--- a/pkg-manager/core/README.md
+++ b/pkg-manager/core/README.md
@@ -146,7 +146,7 @@ interface CustomResolver {
   resolve?: (wantedDependency: WantedDependency, opts: ResolveOptions) => ResolveResult | Promise<ResolveResult>
 
   // Force resolution check
-  shouldForceResolve?: (wantedDependency: WantedDependency) => boolean | Promise<boolean>
+  shouldForceResolve?: (wantedDependency: WantedDependency, wantedLockfile: LockfileObject) => boolean | Promise<boolean>
 }
 ```
 
@@ -164,7 +164,7 @@ interface CustomFetcher {
 
 * `canResolve(wantedDependency)` - Returns `true` if this resolver can resolve the given package descriptor
 * `resolve(wantedDependency, opts)` - Resolves a package descriptor to a resolution. Should return an object with `id` and `resolution`
-* `shouldForceResolve(wantedDependency)` - Return `true` to trigger full resolution of all packages (skipping the "Lockfile is up to date" optimization)
+* `shouldForceResolve(wantedDependency, wantedLockfile)` - Return `true` to trigger full resolution of all packages (skipping the "Lockfile is up to date" optimization). The lockfile contents are provided to enable comparisons with the latest resolved version.
 
 **Custom Fetcher Methods:**
 
diff --git a/pkg-manager/core/src/install/checkCustomResolverForceResolve.ts b/pkg-manager/core/src/install/checkCustomResolverForceResolve.ts
index 67bdee9f4a..34ebf064e3 100644
--- a/pkg-manager/core/src/install/checkCustomResolverForceResolve.ts
+++ b/pkg-manager/core/src/install/checkCustomResolverForceResolve.ts
@@ -36,7 +36,7 @@ export async function checkCustomResolverForceResolve (
 
         if (canResolve && customResolver.shouldForceResolve) {
           // eslint-disable-next-line no-await-in-loop
-          const shouldForce = await customResolver.shouldForceResolve(wantedDependency)
+          const shouldForce = await customResolver.shouldForceResolve(wantedDependency, wantedLockfile)
 
           if (shouldForce) {
             return true
diff --git a/pkg-manager/core/test/install/checkCustomResolverForceResolve.test.ts b/pkg-manager/core/test/install/checkCustomResolverForceResolve.test.ts
index b096c308f7..44aab9f905 100644
--- a/pkg-manager/core/test/install/checkCustomResolverForceResolve.test.ts
+++ b/pkg-manager/core/test/install/checkCustomResolverForceResolve.test.ts
@@ -563,4 +563,41 @@ describe('checkCustomResolverForceResolve', () => {
 
     expect(result).toBe(false)
   })
+
+  test('passes lockfile to shouldForceResolve', async () => {
+    let receivedLockfile: LockfileObject | undefined
+    const lockfile: LockfileObject = {
+      lockfileVersion: '9.0',
+      importers: {
+        '.': {
+          specifiers: { 'test-pkg': '1.0.0' },
+          dependencies: { 'test-pkg': '1.0.0' },
+        },
+      } as any, // eslint-disable-line @typescript-eslint/no-explicit-any
+      packages: {
+        '/test-pkg@1.0.0': {
+          resolution: { tarball: 'http://example.com/test-pkg-1.0.0.tgz', integrity: 'sha512-test' },
+        },
+      } as any, // eslint-disable-line @typescript-eslint/no-explicit-any
+    }
+    const resolver: CustomResolver = {
+      canResolve: () => true,
+      shouldForceResolve: (_wantedDep, wantedLockfile) => {
+        receivedLockfile = wantedLockfile
+        return false
+      },
+    }
+    const projects: ProjectWithManifest[] = [
+      {
+        id: '.' as ProjectId,
+        manifest: {
+          dependencies: { 'test-pkg': '1.0.0' },
+        } as any, // eslint-disable-line @typescript-eslint/no-explicit-any
+      },
+    ]
+
+    await checkCustomResolverForceResolve([resolver], lockfile, projects)
+
+    expect(receivedLockfile).toBe(lockfile)
+  })
 })