diff --git a/src/notebook/Notebook.jl b/src/notebook/Notebook.jl
index 0a34c59857..858081d9c3 100644
--- a/src/notebook/Notebook.jl
+++ b/src/notebook/Notebook.jl
@@ -44,8 +44,8 @@ Base.@kwdef mutable struct Notebook
     # per notebook compiler options
     # nothing means to use global session compiler options
     compiler_options::Union{Nothing,Configuration.CompilerOptions}=nothing
-    # nbpkg_ctx::Union{Nothing,PkgContext}=nothing
-    nbpkg_ctx::Union{Nothing,PkgContext}=PkgCompat.create_empty_ctx()
+    nbpkg_ctx::Union{Nothing,PkgContext}=nothing
+    # nbpkg_ctx::Union{Nothing,PkgContext}=PkgCompat.create_empty_ctx()
     nbpkg_ctx_instantiated::Bool=false
     nbpkg_restart_recommended_msg::Union{Nothing,String}=nothing
     nbpkg_restart_required_msg::Union{Nothing,String}=nothing
diff --git a/src/packages/PkgCompat.jl b/src/packages/PkgCompat.jl
index f0e857fc00..c84a9767ec 100644
--- a/src/packages/PkgCompat.jl
+++ b/src/packages/PkgCompat.jl
@@ -2,11 +2,21 @@ module PkgCompat
 
 export package_versions, package_completions
 
+import REPL
 import Pkg
 import Pkg.Types: VersionRange
 import RegistryInstances
 import ..Pluto
 
+
+
+
+@static if isdefined(Pkg,:REPLMode) && isdefined(Pkg.REPLMode,:complete_remote_package)
+    const REPLMode=Pkg.REPLMode
+else
+    const REPLMode = Base.get_extension(Pkg, :REPLExt)
+end
+
 # Should be in Base
 flatmap(args...) = vcat(map(args...)...)
 
@@ -171,7 +181,7 @@ _get_registries() = RegistryInstances.reachable_registries()
 
 # (✅ "Public" API using RegistryInstances)
 "The cached output value of `_get_registries`."
-const _parsed_registries = Ref(_get_registries())
+const _parsed_registries = Ref(RegistryInstances.RegistryInstance[])
 
 # (✅ "Public" API using RegistryInstances)
 "Re-parse the installed registries from disk."
@@ -179,6 +189,7 @@ function refresh_registry_cache()
 	_parsed_registries[] = _get_registries()
 end
 
+
 # ⚠️✅ Internal API with fallback
 const _updated_registries_compat = @static if isdefined(Pkg, :UPDATED_REGISTRY_THIS_SESSION) && Pkg.UPDATED_REGISTRY_THIS_SESSION isa Ref{Bool}
 	Pkg.UPDATED_REGISTRY_THIS_SESSION
@@ -264,7 +275,13 @@ end
 # ⚠️ Internal API with fallback
 is_stdlib(package_name::AbstractString) = package_name ∈ _stdlibs()
 
-global_ctx = PkgContext()
+
+
+# Initial fill of registry cache
+function    __init__()
+    refresh_registry_cache()
+    global global_ctx=PkgContext()
+end
 
 ###
 # Package names
@@ -282,10 +299,10 @@ end
 function _registered_package_completions(partial_name::AbstractString)::Vector{String}
 	# compat
 	try
-		@static if hasmethod(Pkg.REPLMode.complete_remote_package, (String,))
-			Pkg.REPLMode.complete_remote_package(partial_name)
+		@static if hasmethod(REPLMode.complete_remote_package, (String,))
+			REPLMode.complete_remote_package(partial_name)
 		else
-			Pkg.REPLMode.complete_remote_package(partial_name, 1, length(partial_name))[1]
+			REPLMode.complete_remote_package(partial_name, 1, length(partial_name))[1]
 		end
 	catch e
 		@warn "Pkg compat: failed to autocomplete packages" exception=(e,catch_backtrace())
diff --git a/src/precompile.jl b/src/precompile.jl
index d7bbb8bd6b..d9373a20cd 100644
--- a/src/precompile.jl
+++ b/src/precompile.jl
@@ -36,13 +36,13 @@ PrecompileTools.@compile_workload begin
         Pluto.topological_order(topology, topology.cell_order)
     end
 
-    let
-        io = IOBuffer()
-        # Notebook file format.
-        Pluto.save_notebook(io, nb)
-        seekstart(io)
-        Pluto.load_notebook_nobackup(io, "whatever.jl")
-    end
+    # let
+    #     io = IOBuffer()
+    #     # Notebook file format.
+    #     Pluto.save_notebook(io, nb)
+    #     seekstart(io)
+    #     Pluto.load_notebook_nobackup(io, "whatever.jl")
+    # end
 
     let
         state1 = Pluto.notebook_to_js(nb)