diff --git a/Library/Homebrew/dev-cmd/unbottled.rb b/Library/Homebrew/dev-cmd/unbottled.rb
index 359724dfbb..b64c1fbb43 100644
--- a/Library/Homebrew/dev-cmd/unbottled.rb
+++ b/Library/Homebrew/dev-cmd/unbottled.rb
@@ -1,4 +1,4 @@
-# typed: true
+# typed: strict
 # frozen_string_literal: true
 
 require "abstract_command"
@@ -34,11 +34,11 @@ module Homebrew
       def run
         Formulary.enable_factory_cache!
 
-        @bottle_tag = if (tag = args.tag)
+        @bottle_tag = T.let(if (tag = args.tag)
           Utils::Bottles::Tag.from_symbol(tag.to_sym)
         else
           Utils::Bottles.tag
-        end
+        end, T.nilable(Utils::Bottles::Tag))
 
         if args.lost?
           if args.named.present?
@@ -51,13 +51,13 @@ module Homebrew
           end
         end
 
-        os = @bottle_tag.system
-        arch = if Hardware::CPU::INTEL_ARCHS.include?(@bottle_tag.arch)
+        os = T.must(@bottle_tag).system
+        arch = if Hardware::CPU::INTEL_ARCHS.include?(T.must(@bottle_tag).arch)
           :intel
-        elsif Hardware::CPU::ARM_ARCHS.include?(@bottle_tag.arch)
+        elsif Hardware::CPU::ARM_ARCHS.include?(T.must(@bottle_tag).arch)
           :arm
         else
-          raise "Unknown arch #{@bottle_tag.arch}."
+          raise "Unknown arch #{T.must(@bottle_tag).arch}."
         end
 
         Homebrew::SimulateSystem.with(os:, arch:) do
@@ -98,12 +98,13 @@ module Homebrew
             ["installs", formula_installs]
           end
 
-          output_unbottled(formulae, deps_hash, noun, hash, args.named.present?)
+          output_unbottled(formulae, deps_hash, noun, T.must(hash), args.named.present?)
         end
       end
 
       private
 
+      sig { params(all: T::Boolean).returns([T::Array[Formula], T::Array[Formula], T.nilable(T::Hash[Symbol, Integer])]) }
       def formulae_all_installs_from_args(all)
         if args.named.present?
           formulae = all_formulae = args.named.to_formulae
@@ -115,7 +116,7 @@ module Homebrew
 
           formulae = all_formulae = Formula.all(eval_all: args.eval_all?)
 
-          @sort = " (sorted by number of dependents)"
+          @sort = T.let(" (sorted by number of dependents)", T.nilable(String))
         elsif all
           formulae = all_formulae = Formula.all(eval_all: args.eval_all?)
         else
@@ -142,7 +143,7 @@ module Homebrew
               nil
             end
           end
-          @sort = " (sorted by installs in the last 90 days; top 10,000 only)"
+          @sort = T.let(" (sorted by installs in the last 90 days; top 10,000 only)", T.nilable(String))
 
           all_formulae = Formula.all(eval_all: args.eval_all?)
         end
@@ -151,9 +152,10 @@ module Homebrew
         formulae = Array(formulae).reject(&:deprecated?) if formulae.present?
         all_formulae = Array(all_formulae).reject(&:deprecated?) if all_formulae.present?
 
-        [formulae, all_formulae, formula_installs]
+        [T.let(formulae, T::Array[Formula]), T.let(all_formulae, T::Array[Formula]), T.let(T.must(formula_installs), T.nilable(T::Hash[Symbol, Integer]))]
       end
 
+      sig { params(all_formulae: T.untyped).returns([T::Hash[String, T.untyped], T::Hash[String, T.untyped]]) }
       def deps_uses_from_formulae(all_formulae)
         ohai "Populating dependency tree..."
 
@@ -175,6 +177,7 @@ module Homebrew
         [deps_hash, uses_hash]
       end
 
+      sig { params(formulae: T::Array[Formula]).returns(NilClass) }
       def output_total(formulae)
         ohai "Unbottled :#{@bottle_tag} formulae"
         unbottled_formulae = 0
@@ -188,6 +191,7 @@ module Homebrew
         puts "#{unbottled_formulae}/#{formulae.length} remaining."
       end
 
+      sig { params(formulae: T::Array[Formula], deps_hash: T::Hash[T.any(Symbol, String), T.untyped], noun: T.nilable(String), hash: T::Hash[T.any(Symbol, String), T.untyped], any_named_args: T::Boolean).returns(NilClass) }
       def output_unbottled(formulae, deps_hash, noun, hash, any_named_args)
         ohai ":#{@bottle_tag} bottle status#{@sort}"
         any_found = T.let(false, T::Boolean)
@@ -201,7 +205,7 @@ module Homebrew
           end
 
           requirements = f.recursive_requirements
-          if @bottle_tag.linux?
+          if T.must(@bottle_tag).linux?
             if requirements.any? { |r| r.is_a?(MacOSRequirement) && !r.version }
               puts "#{Tty.bold}#{Tty.red}#{name}#{Tty.reset}: requires macOS" if any_named_args
               next
@@ -210,7 +214,7 @@ module Homebrew
             puts "#{Tty.bold}#{Tty.red}#{name}#{Tty.reset}: requires Linux" if any_named_args
             next
           else
-            macos_version = @bottle_tag.to_macos_version
+            macos_version = T.must(@bottle_tag).to_macos_version
             macos_satisfied = requirements.all? do |r|
               case r
               when MacOSRequirement
@@ -222,7 +226,7 @@ module Homebrew
 
                 Version.new(MacOS::Xcode.latest_version(macos: macos_version)) >= r.version
               when ArchRequirement
-                r.arch == @bottle_tag.arch
+                r.arch == T.must(@bottle_tag).arch
               else
                 true
               end
@@ -258,6 +262,7 @@ module Homebrew
         puts "No unbottled dependencies found!"
       end
 
+      sig { returns(NilClass) }
       def output_lost_bottles
         ohai ":#{@bottle_tag} lost bottles"