diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 8e88005..06c0a32 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.12'
+          - '1.12-nightly'
           - 'nightly'
         os:
           - ubuntu-latest
diff --git a/Project.toml b/Project.toml
index 51348d2..18590f9 100644
--- a/Project.toml
+++ b/Project.toml
@@ -9,7 +9,7 @@ Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 
 [compat]
 DocStringExtensions = "0.9"
-MethodAnalysis = "0.4"
+MethodAnalysis = "0.4, 1"
 julia = "1.12"
 
 [extensions]
diff --git a/ext/MethodAnalysisExt.jl b/ext/MethodAnalysisExt.jl
index fc03e26..bc77e4f 100644
--- a/ext/MethodAnalysisExt.jl
+++ b/ext/MethodAnalysisExt.jl
@@ -24,4 +24,23 @@ function MethodAnalysis.methodinstances(info::PkgCacheInfo)
     return mis
 end
 
+function PkgCacheInspector.count_internal_specializations(info::PkgCacheInfo)
+    spec_counts = Dict{Module,Int}()
+
+    # Get all method instances from the cache
+    all_mis = methodinstances(info)
+
+    # Count method instances by their defining module
+    for mi in all_mis
+        if isa(mi, Core.MethodInstance) && isa(mi.def, Method)
+            method_module = mi.def.module
+            if method_module in info.modules
+                spec_counts[method_module] = get(spec_counts, method_module, 0) + 1
+            end
+        end
+    end
+
+    return spec_counts
+end
+
 end
diff --git a/src/PkgCacheInspector.jl b/src/PkgCacheInspector.jl
index a2f055e..5f69b16 100644
--- a/src/PkgCacheInspector.jl
+++ b/src/PkgCacheInspector.jl
@@ -148,9 +148,52 @@ function Base.show(io::IO, info::PkgCacheInfo)
     nspecs = sort(collect(nspecs); by=last, rev=true)
     nspecs_tot = sum(last, nspecs; init=0)
 
+    # Count internal methods and specializations
+    internal_methods = count_internal_methods(info)
+    total_internal = sum(values(internal_methods))
+
+    # Try to count internal specializations if MethodAnalysis is available
+    internal_specs = Dict{Module,Int}()
+    total_internal_specs = 0
+    internal_specs_sorted = Pair{Module,Int}[]
+
+    internal_specs = count_internal_specializations(info)
+    if internal_specs !== nothing
+        internal_specs_sorted = sort(collect(internal_specs); by=last, rev=true)
+        total_internal_specs = sum(last, internal_specs_sorted; init=0)
+    end
+
     println(io, "Contents of ", info.cachefile, ':')
     println(io, "  modules: ", info.modules)
     !isempty(info.init_order) && println(io, "  init order: ", info.init_order)
+
+    # Show internal methods
+    if total_internal > 0
+        println(io, "  ", total_internal, " internal methods")
+        if length(internal_methods) > 1
+            print(io, "    (")
+            sorted_internal = sort(collect(internal_methods); by=last, rev=true)
+            for i = 1:length(sorted_internal)
+                mod, count = sorted_internal[i]
+                print(io, i==1 ? "" : ", ", nameof(mod), " ", count)
+            end
+            println(io, ")")
+        end
+    end
+
+    # Show internal specializations
+    if internal_specs === nothing
+        println(io, "  specializations of internal methods: (requires MethodAnalysis.jl)")
+    elseif total_internal_specs > 0
+        print(io, "  ", total_internal_specs, " specializations of internal methods ")
+        for i = 1:min(3, length(internal_specs_sorted))
+            mod, count = internal_specs_sorted[i]
+            pct = round(100*count/total_internal_specs; digits=1)
+            print(io, i==1 ? "(" : ", ", nameof(mod), " ", pct, "%")
+        end
+        println(io, length(internal_specs_sorted) > 3 ? ", ...)" : ")")
+    end
+
     !isempty(info.external_methods) && println(io, "  ", length(info.external_methods), " external methods")
     if !isempty(info.new_specializations)
         print(io, "  ", length(info.new_specializations), " new specializations of external methods ")
@@ -182,6 +225,22 @@ function count_module_specializations(new_specializations)
     return modcount
 end
 
+# count_internal_specializations is defined in MethodAnalysisExt when MethodAnalysis is loaded
+count_internal_specializations(::Any) = nothing
+
+# Count the number of methods defined within each of the package's own modules.
+# These are methods that belong to the modules stored in the package image,
+# as opposed to external methods which extend functions from other modules.
+function count_internal_methods(info::PkgCacheInfo)
+    method_counts = Dict{Module,Int}()
+    Base.visit(Core.GlobalMethods) do method
+        if method.module in info.modules
+            method_counts[method.module] = get(method_counts, method.module, 0) + 1
+        end
+    end
+    return method_counts
+end
+
 function info_cachefile(pkg::PkgId, path::String, depmods::Vector{Any}, image_targets::Vector{Any}, isocache::Bool=false)
     if isocache
         sv = ccall(:jl_restore_package_image_from_file, Any, (Cstring, Any, Cint, Cstring, Cint), path, depmods, true, pkg.name, false)
diff --git a/test/runtests.jl b/test/runtests.jl
index b5fd3ca..7486f63 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -15,6 +15,8 @@ module EmptyPkg end
     str = sprint(show, info)
     @test occursin("relocations", str) && occursin("new specializations", str) && occursin("targets", str)
     @test occursin("file size", str)
+    @test occursin("internal methods", str)
+    @test occursin("specializations of internal methods", str)
 
     mis = methodinstances(info)
     @test eltype(mis) === Core.MethodInstance