diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 46b9b6b24..3b005e525 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.1.0-alpha.9"
+  ".": "0.1.0-alpha.10"
 }
\ No newline at end of file
diff --git a/.rubocop.yml b/.rubocop.yml
index ec3ed2efc..b0ad29c38 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -244,6 +244,7 @@ Style/SafeNavigation:
 Style/SignalException:
   Exclude:
     - Rakefile
+    - "**/*.rake"
 
 # We use these sparingly, where we anticipate future branches for the
 # inner conditional.
diff --git a/.stats.yml b/.stats.yml
index d33052a80..68698ff6f 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 199
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/increase%2Fincrease-55c174581a08cabdf3fcf2fc66d480d497c5f77ab8f0f5e776cc7113b4960037.yml
-openapi_spec_hash: 8f70d88f00c9c15ebd8e9049e9f65063
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/increase%2Fincrease-1044f3fb430b9b4019ec3adeaa8b37e6615264fddb273a48b1d9ddd7c2b7b854.yml
+openapi_spec_hash: c2526b64321711688cada903e7b4397d
 config_hash: 20a463ecd33bd32b7b9bc6f4990907ac
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 08e7c84d5..77ea25e0d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,27 @@
 # Changelog
 
+## 0.1.0-alpha.10 (2025-04-15)
+
+Full Changelog: [v0.1.0-alpha.9...v0.1.0-alpha.10](https://github.com/Increase/increase-ruby/compare/v0.1.0-alpha.9...v0.1.0-alpha.10)
+
+### Features
+
+* **api:** api update ([f6c5568](https://github.com/Increase/increase-ruby/commit/f6c5568f67ff3b44fa3c27569cafbb99e48cc71d))
+
+
+### Chores
+
+* **internal:** always run post-processing when formatting when syntax_tree ([0ee8912](https://github.com/Increase/increase-ruby/commit/0ee8912f81636d5f74a736e4c8d1707b204e395a))
+* **internal:** loosen internal type restrictions ([56e169c](https://github.com/Increase/increase-ruby/commit/56e169c9fcc2a898d8671e591dec0c606f4ce24c))
+* **internal:** minor touch ups on sdk internals ([ed29ff6](https://github.com/Increase/increase-ruby/commit/ed29ff6868a89b11bea12c07b6cd834b6769cb41))
+* **internal:** mostly README touch ups ([23519d3](https://github.com/Increase/increase-ruby/commit/23519d3197bf59ba73812fda30d28101a6c5f40f))
+* make internal types pretty print ([18c33c5](https://github.com/Increase/increase-ruby/commit/18c33c5f6fe4bb1a0e0fac9083dac8b1f063fdd1))
+
+
+### Documentation
+
+* update documentation links to be more uniform ([b1f42d9](https://github.com/Increase/increase-ruby/commit/b1f42d9ef89f3a8d3db9f97e9267690e49826d2e))
+
 ## 0.1.0-alpha.9 (2025-04-12)
 
 Full Changelog: [v0.1.0-alpha.8...v0.1.0-alpha.9](https://github.com/Increase/increase-ruby/compare/v0.1.0-alpha.8...v0.1.0-alpha.9)
diff --git a/Gemfile.lock b/Gemfile.lock
index 6d3f578d8..61a55a225 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GIT
 PATH
   remote: .
   specs:
-    increase (0.1.0.pre.alpha.9)
+    increase (0.1.0.pre.alpha.10)
       connection_pool
 
 GEM
diff --git a/README.md b/README.md
index a46e885a8..3b790fdc8 100644
--- a/README.md
+++ b/README.md
@@ -4,9 +4,9 @@ The Increase Ruby library provides convenient access to the Increase REST API fr
 
 ## Documentation
 
-Documentation for released of this gem can be found [on RubyDoc](https://gemdocs.org/gems/increase).
+Documentation for releases of this gem can be found [on RubyDoc](https://gemdocs.org/gems/increase).
 
-The underlying REST API documentation can be found on [increase.com](https://increase.com/documentation).
+The REST API documentation can be found on [increase.com](https://increase.com/documentation).
 
 ## Installation
 
@@ -15,7 +15,7 @@ To use this gem, install via Bundler by adding the following to your application
 <!-- x-release-please-start-version -->
 
 ```ruby
-gem "increase", "~> 0.1.0.pre.alpha.9"
+gem "increase", "~> 0.1.0.pre.alpha.10"
 ```
 
 <!-- x-release-please-end -->
diff --git a/Rakefile b/Rakefile
index b03cc69ab..3bbb7689d 100644
--- a/Rakefile
+++ b/Rakefile
@@ -59,12 +59,19 @@ multitask(:syntax_tree) do
   #   2. at label `l1`, join previously annotated line with `class | module` information.
   pst = sed + [subst, "--"]
 
+  success = false
+
   # transform class aliases to type aliases, which syntax tree has no trouble with
   sh("#{find.shelljoin} | #{pre.shelljoin}")
   # run syntax tree to format `*.rbs` files
-  sh("#{find.shelljoin} | #{fmt.shelljoin}")
+  sh("#{find.shelljoin} | #{fmt.shelljoin}") do
+    success = _1
+  end
   # transform type aliases back to class aliases
   sh("#{find.shelljoin} | #{pst.shelljoin}")
+
+  # always run post-processing to remove comment marker
+  fail unless success
 end
 
 multitask(format: [:ruboformat, :syntax_tree])
diff --git a/lib/increase/internal.rb b/lib/increase/internal.rb
index 4fe8019ac..2be0303e6 100644
--- a/lib/increase/internal.rb
+++ b/lib/increase/internal.rb
@@ -3,6 +3,10 @@
 module Increase
   # @api private
   module Internal
-    OMIT = Object.new.freeze
+    OMIT =
+      Object.new.tap do
+        _1.define_singleton_method(:inspect) { "#<#{Increase::Internal}::OMIT>" }
+      end
+        .freeze
   end
 end
diff --git a/lib/increase/internal/page.rb b/lib/increase/internal/page.rb
index 6414c4ed2..05f31f70c 100644
--- a/lib/increase/internal/page.rb
+++ b/lib/increase/internal/page.rb
@@ -22,29 +22,6 @@ class Page
       # @return [String, nil]
       attr_accessor :next_cursor
 
-      # @api private
-      #
-      # @param client [Increase::Internal::Transport::BaseClient]
-      # @param req [Hash{Symbol=>Object}]
-      # @param headers [Hash{String=>String}, Net::HTTPHeader]
-      # @param page_data [Hash{Symbol=>Object}]
-      def initialize(client:, req:, headers:, page_data:)
-        super
-        model = req.fetch(:model)
-
-        case page_data
-        in {data: Array | nil => data}
-          @data = data&.map { Increase::Internal::Type::Converter.coerce(model, _1) }
-        else
-        end
-
-        case page_data
-        in {next_cursor: String | nil => next_cursor}
-          @next_cursor = next_cursor
-        else
-        end
-      end
-
       # @return [Boolean]
       def next_page?
         !next_cursor.nil?
@@ -69,17 +46,40 @@ def auto_paging_each(&blk)
         unless block_given?
           raise ArgumentError.new("A block must be given to ##{__method__}")
         end
+
         page = self
         loop do
-          page.data&.each { blk.call(_1) }
+          page.data&.each(&blk)
+
           break unless page.next_page?
           page = page.next_page
         end
       end
 
+      # @api private
+      #
+      # @param client [Increase::Internal::Transport::BaseClient]
+      # @param req [Hash{Symbol=>Object}]
+      # @param headers [Hash{String=>String}, Net::HTTPHeader]
+      # @param page_data [Hash{Symbol=>Object}]
+      def initialize(client:, req:, headers:, page_data:)
+        super
+
+        case page_data
+        in {data: Array | nil => data}
+          @data = data&.map { Increase::Internal::Type::Converter.coerce(@model, _1) }
+        else
+        end
+        @next_cursor = page_data[:next_cursor]
+      end
+
+      # @api private
+      #
       # @return [String]
       def inspect
-        "#<#{self.class}:0x#{object_id.to_s(16)} data=#{data.inspect} next_cursor=#{next_cursor.inspect}>"
+        model = Increase::Internal::Type::Converter.inspect(@model, depth: 1)
+
+        "#<#{self.class}[#{model}]:0x#{object_id.to_s(16)} next_cursor=#{next_cursor.inspect}>"
       end
     end
   end
diff --git a/lib/increase/internal/transport/base_client.rb b/lib/increase/internal/transport/base_client.rb
index e4cbb11d3..cb3d117f6 100644
--- a/lib/increase/internal/transport/base_client.rb
+++ b/lib/increase/internal/transport/base_client.rb
@@ -93,7 +93,11 @@ def follow_redirect(request, status:, response_headers:)
                 URI.join(url, response_headers["location"])
               rescue ArgumentError
                 message = "Server responded with status #{status} but no valid location header."
-                raise Increase::Errors::APIConnectionError.new(url: url, message: message)
+                raise Increase::Errors::APIConnectionError.new(
+                  url: url,
+                  response: response_headers,
+                  message: message
+                )
               end
 
             request = {**request, url: location}
@@ -101,7 +105,11 @@ def follow_redirect(request, status:, response_headers:)
             case [url.scheme, location.scheme]
             in ["https", "http"]
               message = "Tried to redirect to a insecure URL"
-              raise Increase::Errors::APIConnectionError.new(url: url, message: message)
+              raise Increase::Errors::APIConnectionError.new(
+                url: url,
+                response: response_headers,
+                message: message
+              )
             else
               nil
             end
@@ -350,7 +358,7 @@ def initialize(
             self.class.reap_connection!(status, stream: stream)
 
             message = "Failed to complete the request within #{self.class::MAX_REDIRECTS} redirects."
-            raise Increase::Errors::APIConnectionError.new(url: url, message: message)
+            raise Increase::Errors::APIConnectionError.new(url: url, response: response, message: message)
           in 300..399
             self.class.reap_connection!(status, stream: stream)
 
@@ -460,6 +468,8 @@ def request(req)
           end
         end
 
+        # @api private
+        #
         # @return [String]
         def inspect
           # rubocop:disable Layout/LineLength
diff --git a/lib/increase/internal/type/array_of.rb b/lib/increase/internal/type/array_of.rb
index 198355ca2..65ea2f424 100644
--- a/lib/increase/internal/type/array_of.rb
+++ b/lib/increase/internal/type/array_of.rb
@@ -13,6 +13,10 @@ module Type
       class ArrayOf
         include Increase::Internal::Type::Converter
 
+        private_class_method :new
+
+        # @overload [](type_info, spec = {})
+        #
         # @param type_info [Hash{Symbol=>Object}, Proc, Increase::Internal::Type::Converter, Class]
         #
         # @param spec [Hash{Symbol=>Object}] .
@@ -24,7 +28,7 @@ class ArrayOf
         #   @option spec [Proc] :union
         #
         #   @option spec [Boolean] :"nil?"
-        def self.[](type_info, spec = {}) = new(type_info, spec)
+        def self.[](...) = new(...)
 
         # @param other [Object]
         #
@@ -120,7 +124,18 @@ def dump(value, state:)
         #   @option spec [Boolean] :"nil?"
         def initialize(type_info, spec = {})
           @item_type_fn = Increase::Internal::Type::Converter.type_info(type_info || spec)
-          @nilable = spec[:nil?]
+          @nilable = spec.fetch(:nil?, false)
+        end
+
+        # @api private
+        #
+        # @param depth [Integer]
+        #
+        # @return [String]
+        def inspect(depth: 0)
+          items = Increase::Internal::Type::Converter.inspect(item_type, depth: depth.succ)
+
+          "#{self.class}[#{[items, nilable? ? 'nil' : nil].compact.join(' | ')}]"
         end
       end
     end
diff --git a/lib/increase/internal/type/base_model.rb b/lib/increase/internal/type/base_model.rb
index c9452e657..fab12c0b4 100644
--- a/lib/increase/internal/type/base_model.rb
+++ b/lib/increase/internal/type/base_model.rb
@@ -63,7 +63,7 @@ def fields
 
             setter = "#{name_sym}="
             api_name = info.fetch(:api_name, name_sym)
-            nilable = info[:nil?]
+            nilable = info.fetch(:nil?, false)
             const = if required && !nilable
               info.fetch(
                 :const,
@@ -368,14 +368,42 @@ def initialize(data = {})
           end
         end
 
+        class << self
+          # @api private
+          #
+          # @param depth [Integer]
+          #
+          # @return [String]
+          def inspect(depth: 0)
+            return super() if depth.positive?
+
+            depth = depth.succ
+            deferred = fields.transform_values do |field|
+              type, required, nilable = field.fetch_values(:type, :required, :nilable)
+              -> do
+                [
+                  Increase::Internal::Type::Converter.inspect(type, depth: depth),
+                  !required || nilable ? "nil" : nil
+                ].compact.join(" | ")
+              end
+                .tap { _1.define_singleton_method(:inspect) { call } }
+            end
+
+            "#{name}[#{deferred.inspect}]"
+          end
+        end
+
+        # @api private
+        #
         # @return [String]
         def inspect
-          rows = self.class.known_fields.keys.map do
-            "#{_1}=#{@data.key?(_1) ? public_send(_1) : ''}"
+          rows = @data.map do
+            "#{_1}=#{self.class.known_fields.key?(_1) ? public_send(_1).inspect : ''}"
           rescue Increase::Errors::ConversionError
-            "#{_1}=#{@data.fetch(_1)}"
+            "#{_1}=#{_2.inspect}"
           end
-          "#<#{self.class.name}:0x#{object_id.to_s(16)} #{rows.join(' ')}>"
+
+          "#<#{self.class}:0x#{object_id.to_s(16)} #{rows.join(' ')}>"
         end
       end
     end
diff --git a/lib/increase/internal/type/base_page.rb b/lib/increase/internal/type/base_page.rb
index 6cfa0f8eb..63c947068 100644
--- a/lib/increase/internal/type/base_page.rb
+++ b/lib/increase/internal/type/base_page.rb
@@ -36,6 +36,7 @@ def to_enum = super(:auto_paging_each)
         def initialize(client:, req:, headers:, page_data:)
           @client = client
           @req = req
+          @model = req.fetch(:model)
           super()
         end
 
diff --git a/lib/increase/internal/type/boolean.rb b/lib/increase/internal/type/boolean.rb
index f55c003d3..35d9f8b6d 100644
--- a/lib/increase/internal/type/boolean.rb
+++ b/lib/increase/internal/type/boolean.rb
@@ -11,6 +11,8 @@ module Type
       class Boolean
         extend Increase::Internal::Type::Converter
 
+        private_class_method :new
+
         # @param other [Object]
         #
         # @return [Boolean]
diff --git a/lib/increase/internal/type/converter.rb b/lib/increase/internal/type/converter.rb
index debe97ddf..eea85f1ad 100644
--- a/lib/increase/internal/type/converter.rb
+++ b/lib/increase/internal/type/converter.rb
@@ -49,6 +49,15 @@ def dump(value, state:)
           end
         end
 
+        # @api private
+        #
+        # @param depth [Integer]
+        #
+        # @return [String]
+        def inspect(depth: 0)
+          super()
+        end
+
         # rubocop:enable Lint/UnusedMethodArgument
 
         class << self
@@ -240,6 +249,21 @@ def dump(target, value, state: {can_retry: true})
               Increase::Internal::Type::Unknown.dump(value, state: state)
             end
           end
+
+          # @api private
+          #
+          # @param target [Object]
+          # @param depth [Integer]
+          #
+          # @return [String]
+          def inspect(target, depth:)
+            case target
+            in Increase::Internal::Type::Converter
+              target.inspect(depth: depth.succ)
+            else
+              target.inspect
+            end
+          end
         end
       end
     end
diff --git a/lib/increase/internal/type/enum.rb b/lib/increase/internal/type/enum.rb
index 65e92a34b..1da9a38ce 100644
--- a/lib/increase/internal/type/enum.rb
+++ b/lib/increase/internal/type/enum.rb
@@ -37,9 +37,9 @@ def ===(other) = values.include?(other)
         #
         # @return [Boolean]
         def ==(other)
-          # rubocop:disable Layout/LineLength
-          other.is_a?(Module) && other.singleton_class <= Increase::Internal::Type::Enum && other.values.to_set == values.to_set
-          # rubocop:enable Layout/LineLength
+          # rubocop:disable Style/CaseEquality
+          Increase::Internal::Type::Enum === other && other.values.to_set == values.to_set
+          # rubocop:enable Style/CaseEquality
         end
 
         # @api private
@@ -82,6 +82,22 @@ def coerce(value, state:)
         #   #
         #   # @return [Symbol, Object]
         #   def dump(value, state:) = super
+
+        # @api private
+        #
+        # @param depth [Integer]
+        #
+        # @return [String]
+        def inspect(depth: 0)
+          if depth.positive?
+            return is_a?(Module) ? super() : self.class.name
+          end
+
+          members = values.map { Increase::Internal::Type::Converter.inspect(_1, depth: depth.succ) }
+          prefix = is_a?(Module) ? name : self.class.name
+
+          "#{prefix}[#{members.join(' | ')}]"
+        end
       end
     end
   end
diff --git a/lib/increase/internal/type/hash_of.rb b/lib/increase/internal/type/hash_of.rb
index 776458316..6a4413682 100644
--- a/lib/increase/internal/type/hash_of.rb
+++ b/lib/increase/internal/type/hash_of.rb
@@ -13,6 +13,10 @@ module Type
       class HashOf
         include Increase::Internal::Type::Converter
 
+        private_class_method :new
+
+        # @overload [](type_info, spec = {})
+        #
         # @param type_info [Hash{Symbol=>Object}, Proc, Increase::Internal::Type::Converter, Class]
         #
         # @param spec [Hash{Symbol=>Object}] .
@@ -24,7 +28,7 @@ class HashOf
         #   @option spec [Proc] :union
         #
         #   @option spec [Boolean] :"nil?"
-        def self.[](type_info, spec = {}) = new(type_info, spec)
+        def self.[](...) = new(...)
 
         # @param other [Object]
         #
@@ -140,7 +144,18 @@ def dump(value, state:)
         #   @option spec [Boolean] :"nil?"
         def initialize(type_info, spec = {})
           @item_type_fn = Increase::Internal::Type::Converter.type_info(type_info || spec)
-          @nilable = spec[:nil?]
+          @nilable = spec.fetch(:nil?, false)
+        end
+
+        # @api private
+        #
+        # @param depth [Integer]
+        #
+        # @return [String]
+        def inspect(depth: 0)
+          items = Increase::Internal::Type::Converter.inspect(item_type, depth: depth.succ)
+
+          "#{self.class}[#{[items, nilable? ? 'nil' : nil].compact.join(' | ')}]"
         end
       end
     end
diff --git a/lib/increase/internal/type/io_like.rb b/lib/increase/internal/type/io_like.rb
index 41068fb4f..e108d2618 100644
--- a/lib/increase/internal/type/io_like.rb
+++ b/lib/increase/internal/type/io_like.rb
@@ -11,6 +11,8 @@ module Type
       class IOLike
         extend Increase::Internal::Type::Converter
 
+        private_class_method :new
+
         # @param other [Object]
         #
         # @return [Boolean]
diff --git a/lib/increase/internal/type/union.rb b/lib/increase/internal/type/union.rb
index b3fbb416e..5e57227ad 100644
--- a/lib/increase/internal/type/union.rb
+++ b/lib/increase/internal/type/union.rb
@@ -100,9 +100,7 @@ def ===(other)
         #
         # @return [Boolean]
         def ==(other)
-          # rubocop:disable Layout/LineLength
-          other.is_a?(Module) && other.singleton_class <= Increase::Internal::Type::Union && other.derefed_variants == derefed_variants
-          # rubocop:enable Layout/LineLength
+          Increase::Internal::Type::Union === other && other.derefed_variants == derefed_variants
         end
 
         # @api private
@@ -185,6 +183,22 @@ def dump(value, state:)
 
         # rubocop:enable Style/CaseEquality
         # rubocop:enable Style/HashEachMethods
+
+        # @api private
+        #
+        # @param depth [Integer]
+        #
+        # @return [String]
+        def inspect(depth: 0)
+          if depth.positive?
+            return is_a?(Module) ? super() : self.class.name
+          end
+
+          members = variants.map { Increase::Internal::Type::Converter.inspect(_1, depth: depth.succ) }
+          prefix = is_a?(Module) ? name : self.class.name
+
+          "#{prefix}[#{members.join(' | ')}]"
+        end
       end
     end
   end
diff --git a/lib/increase/internal/type/unknown.rb b/lib/increase/internal/type/unknown.rb
index 85f51ec3e..30bd44c75 100644
--- a/lib/increase/internal/type/unknown.rb
+++ b/lib/increase/internal/type/unknown.rb
@@ -13,6 +13,8 @@ class Unknown
 
         # rubocop:disable Lint/UnusedMethodArgument
 
+        private_class_method :new
+
         # @param other [Object]
         #
         # @return [Boolean]
diff --git a/lib/increase/models/ach_transfer.rb b/lib/increase/models/ach_transfer.rb
index 7db4f19ed..1ea03cc3d 100644
--- a/lib/increase/models/ach_transfer.rb
+++ b/lib/increase/models/ach_transfer.rb
@@ -76,6 +76,12 @@ class ACHTransfer < Increase::Internal::Type::BaseModel
       #   @return [String, nil]
       required :company_entry_description, String, nil?: true
 
+      # @!attribute company_id
+      #   The company ID associated with the transfer.
+      #
+      #   @return [String]
+      required :company_id, String
+
       # @!attribute company_name
       #   The name by which the recipient knows you.
       #
@@ -256,6 +262,7 @@ class ACHTransfer < Increase::Internal::Type::BaseModel
       #   # @param company_descriptive_date [String, nil]
       #   # @param company_discretionary_data [String, nil]
       #   # @param company_entry_description [String, nil]
+      #   # @param company_id [String]
       #   # @param company_name [String, nil]
       #   # @param created_at [Time]
       #   # @param created_by [Increase::Models::ACHTransfer::CreatedBy, nil]
@@ -293,6 +300,7 @@ class ACHTransfer < Increase::Internal::Type::BaseModel
       #     company_descriptive_date:,
       #     company_discretionary_data:,
       #     company_entry_description:,
+      #     company_id:,
       #     company_name:,
       #     created_at:,
       #     created_by:,
diff --git a/lib/increase/version.rb b/lib/increase/version.rb
index e9f349fff..d9f7264d8 100644
--- a/lib/increase/version.rb
+++ b/lib/increase/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Increase
-  VERSION = "0.1.0.pre.alpha.9"
+  VERSION = "0.1.0.pre.alpha.10"
 end
diff --git a/rbi/lib/increase/internal.rbi b/rbi/lib/increase/internal.rbi
index e8b36a6d8..528cb8934 100644
--- a/rbi/lib/increase/internal.rbi
+++ b/rbi/lib/increase/internal.rbi
@@ -7,6 +7,6 @@ module Increase
     # this alias might be refined in the future.
     AnyHash = T.type_alias { T::Hash[Symbol, T.anything] }
 
-    OMIT = T.let(T.anything, T.anything)
+    OMIT = T.let(Object.new.freeze, T.anything)
   end
 end
diff --git a/rbi/lib/increase/internal/page.rbi b/rbi/lib/increase/internal/page.rbi
index bc7a14bda..8388be6d7 100644
--- a/rbi/lib/increase/internal/page.rbi
+++ b/rbi/lib/increase/internal/page.rbi
@@ -13,6 +13,7 @@ module Increase
       sig { returns(T.nilable(String)) }
       attr_accessor :next_cursor
 
+      # @api private
       sig { returns(String) }
       def inspect; end
     end
diff --git a/rbi/lib/increase/internal/transport/base_client.rbi b/rbi/lib/increase/internal/transport/base_client.rbi
index 7c5313df3..e617789c0 100644
--- a/rbi/lib/increase/internal/transport/base_client.rbi
+++ b/rbi/lib/increase/internal/transport/base_client.rbi
@@ -190,6 +190,7 @@ module Increase
           model: Increase::Internal::Type::Unknown,
           options: {}
         ); end
+        # @api private
         sig { returns(String) }
         def inspect; end
       end
diff --git a/rbi/lib/increase/internal/type/array_of.rbi b/rbi/lib/increase/internal/type/array_of.rbi
index afc4b560b..4c33e004c 100644
--- a/rbi/lib/increase/internal/type/array_of.rbi
+++ b/rbi/lib/increase/internal/type/array_of.rbi
@@ -10,11 +10,10 @@ module Increase
         include Increase::Internal::Type::Converter
 
         abstract!
-        final!
 
         Elem = type_member(:out)
 
-        sig(:final) do
+        sig do
           params(
             type_info: T.any(
               Increase::Internal::AnyHash,
@@ -27,14 +26,14 @@ module Increase
         end
         def self.[](type_info, spec = {}); end
 
-        sig(:final) { params(other: T.anything).returns(T::Boolean) }
+        sig { params(other: T.anything).returns(T::Boolean) }
         def ===(other); end
 
-        sig(:final) { params(other: T.anything).returns(T::Boolean) }
+        sig { params(other: T.anything).returns(T::Boolean) }
         def ==(other); end
 
         # @api private
-        sig(:final) do
+        sig do
           override
             .params(
               value: T.any(T::Array[T.anything], T.anything),
@@ -45,7 +44,7 @@ module Increase
         def coerce(value, state:); end
 
         # @api private
-        sig(:final) do
+        sig do
           override
             .params(
               value: T.any(T::Array[T.anything], T.anything),
@@ -56,15 +55,15 @@ module Increase
         def dump(value, state:); end
 
         # @api private
-        sig(:final) { returns(Elem) }
+        sig { returns(Elem) }
         protected def item_type; end
 
         # @api private
-        sig(:final) { returns(T::Boolean) }
+        sig { returns(T::Boolean) }
         protected def nilable?; end
 
         # @api private
-        sig(:final) do
+        sig do
           params(
             type_info: T.any(
               Increase::Internal::AnyHash,
@@ -76,6 +75,10 @@ module Increase
             .void
         end
         def initialize(type_info, spec = {}); end
+
+        # @api private
+        sig { params(depth: Integer).returns(String) }
+        def inspect(depth: 0); end
       end
     end
   end
diff --git a/rbi/lib/increase/internal/type/base_model.rbi b/rbi/lib/increase/internal/type/base_model.rbi
index 3453e0546..80dacfb57 100644
--- a/rbi/lib/increase/internal/type/base_model.rbi
+++ b/rbi/lib/increase/internal/type/base_model.rbi
@@ -189,6 +189,13 @@ module Increase
         sig { params(data: T.any(T::Hash[Symbol, T.anything], T.self_type)).returns(T.attached_class) }
         def self.new(data = {}); end
 
+        class << self
+          # @api private
+          sig { params(depth: Integer).returns(String) }
+          def inspect(depth: 0); end
+        end
+
+        # @api private
         sig { returns(String) }
         def inspect; end
       end
diff --git a/rbi/lib/increase/internal/type/boolean.rbi b/rbi/lib/increase/internal/type/boolean.rbi
index 64ef96efe..71f200257 100644
--- a/rbi/lib/increase/internal/type/boolean.rbi
+++ b/rbi/lib/increase/internal/type/boolean.rbi
@@ -10,17 +10,16 @@ module Increase
         extend Increase::Internal::Type::Converter
 
         abstract!
-        final!
 
-        sig(:final) { params(other: T.anything).returns(T::Boolean) }
+        sig { params(other: T.anything).returns(T::Boolean) }
         def self.===(other); end
 
-        sig(:final) { params(other: T.anything).returns(T::Boolean) }
+        sig { params(other: T.anything).returns(T::Boolean) }
         def self.==(other); end
 
         class << self
           # @api private
-          sig(:final) do
+          sig do
             override
               .params(value: T.any(
                 T::Boolean,
@@ -32,7 +31,7 @@ module Increase
           def coerce(value, state:); end
 
           # @api private
-          sig(:final) do
+          sig do
             override
               .params(value: T.any(
                 T::Boolean,
diff --git a/rbi/lib/increase/internal/type/converter.rbi b/rbi/lib/increase/internal/type/converter.rbi
index 49de4cc1b..f4c7bb112 100644
--- a/rbi/lib/increase/internal/type/converter.rbi
+++ b/rbi/lib/increase/internal/type/converter.rbi
@@ -34,6 +34,10 @@ module Increase
         end
         def dump(value, state:); end
 
+        # @api private
+        sig { params(depth: Integer).returns(String) }
+        def inspect(depth: 0); end
+
         class << self
           # @api private
           sig do
@@ -105,6 +109,10 @@ module Increase
               .returns(T.anything)
           end
           def self.dump(target, value, state: {can_retry: true}); end
+
+          # @api private
+          sig { params(target: T.anything, depth: Integer).returns(String) }
+          def self.inspect(target, depth:); end
         end
       end
     end
diff --git a/rbi/lib/increase/internal/type/enum.rbi b/rbi/lib/increase/internal/type/enum.rbi
index 01e5e2f66..474ab6ef0 100644
--- a/rbi/lib/increase/internal/type/enum.rbi
+++ b/rbi/lib/increase/internal/type/enum.rbi
@@ -57,6 +57,10 @@ module Increase
             .returns(T.any(Symbol, T.anything))
         end
         def dump(value, state:); end
+
+        # @api private
+        sig { params(depth: Integer).returns(String) }
+        def inspect(depth: 0); end
       end
     end
   end
diff --git a/rbi/lib/increase/internal/type/hash_of.rbi b/rbi/lib/increase/internal/type/hash_of.rbi
index 13bf0c096..08292e39c 100644
--- a/rbi/lib/increase/internal/type/hash_of.rbi
+++ b/rbi/lib/increase/internal/type/hash_of.rbi
@@ -10,11 +10,10 @@ module Increase
         include Increase::Internal::Type::Converter
 
         abstract!
-        final!
 
         Elem = type_member(:out)
 
-        sig(:final) do
+        sig do
           params(
             type_info: T.any(
               Increase::Internal::AnyHash,
@@ -27,14 +26,14 @@ module Increase
         end
         def self.[](type_info, spec = {}); end
 
-        sig(:final) { params(other: T.anything).returns(T::Boolean) }
+        sig { params(other: T.anything).returns(T::Boolean) }
         def ===(other); end
 
-        sig(:final) { params(other: T.anything).returns(T::Boolean) }
+        sig { params(other: T.anything).returns(T::Boolean) }
         def ==(other); end
 
         # @api private
-        sig(:final) do
+        sig do
           override
             .params(
               value: T.any(T::Hash[T.anything, T.anything], T.anything),
@@ -45,7 +44,7 @@ module Increase
         def coerce(value, state:); end
 
         # @api private
-        sig(:final) do
+        sig do
           override
             .params(
               value: T.any(T::Hash[T.anything, T.anything], T.anything),
@@ -56,15 +55,15 @@ module Increase
         def dump(value, state:); end
 
         # @api private
-        sig(:final) { returns(Elem) }
+        sig { returns(Elem) }
         protected def item_type; end
 
         # @api private
-        sig(:final) { returns(T::Boolean) }
+        sig { returns(T::Boolean) }
         protected def nilable?; end
 
         # @api private
-        sig(:final) do
+        sig do
           params(
             type_info: T.any(
               Increase::Internal::AnyHash,
@@ -76,6 +75,10 @@ module Increase
             .void
         end
         def initialize(type_info, spec = {}); end
+
+        # @api private
+        sig { params(depth: Integer).returns(String) }
+        def inspect(depth: 0); end
       end
     end
   end
diff --git a/rbi/lib/increase/internal/type/io_like.rbi b/rbi/lib/increase/internal/type/io_like.rbi
index d5974fe3e..5afc5243f 100644
--- a/rbi/lib/increase/internal/type/io_like.rbi
+++ b/rbi/lib/increase/internal/type/io_like.rbi
@@ -10,17 +10,16 @@ module Increase
         extend Increase::Internal::Type::Converter
 
         abstract!
-        final!
 
-        sig(:final) { params(other: T.anything).returns(T::Boolean) }
+        sig { params(other: T.anything).returns(T::Boolean) }
         def self.===(other); end
 
-        sig(:final) { params(other: T.anything).returns(T::Boolean) }
+        sig { params(other: T.anything).returns(T::Boolean) }
         def self.==(other); end
 
         class << self
           # @api private
-          sig(:final) do
+          sig do
             override
               .params(
                 value: T.any(StringIO, String, T.anything),
@@ -31,7 +30,7 @@ module Increase
           def coerce(value, state:); end
 
           # @api private
-          sig(:final) do
+          sig do
             override
               .params(
                 value: T.any(Pathname, StringIO, IO, String, T.anything),
diff --git a/rbi/lib/increase/internal/type/union.rbi b/rbi/lib/increase/internal/type/union.rbi
index ca2a3dd2b..d53f690d5 100644
--- a/rbi/lib/increase/internal/type/union.rbi
+++ b/rbi/lib/increase/internal/type/union.rbi
@@ -62,6 +62,10 @@ module Increase
             .returns(T.anything)
         end
         def dump(value, state:); end
+
+        # @api private
+        sig { params(depth: Integer).returns(String) }
+        def inspect(depth: 0); end
       end
     end
   end
diff --git a/rbi/lib/increase/internal/type/unknown.rbi b/rbi/lib/increase/internal/type/unknown.rbi
index a87d6ce0f..49737ff6d 100644
--- a/rbi/lib/increase/internal/type/unknown.rbi
+++ b/rbi/lib/increase/internal/type/unknown.rbi
@@ -10,17 +10,16 @@ module Increase
         extend Increase::Internal::Type::Converter
 
         abstract!
-        final!
 
-        sig(:final) { params(other: T.anything).returns(T::Boolean) }
+        sig { params(other: T.anything).returns(T::Boolean) }
         def self.===(other); end
 
-        sig(:final) { params(other: T.anything).returns(T::Boolean) }
+        sig { params(other: T.anything).returns(T::Boolean) }
         def self.==(other); end
 
         class << self
           # @api private
-          sig(:final) do
+          sig do
             override
               .params(value: T.anything, state: Increase::Internal::Type::Converter::CoerceState)
               .returns(T.anything)
@@ -28,7 +27,7 @@ module Increase
           def coerce(value, state:); end
 
           # @api private
-          sig(:final) do
+          sig do
             override
               .params(value: T.anything, state: Increase::Internal::Type::Converter::DumpState)
               .returns(T.anything)
diff --git a/rbi/lib/increase/models/ach_transfer.rbi b/rbi/lib/increase/models/ach_transfer.rbi
index e5c5b028c..45ce99e67 100644
--- a/rbi/lib/increase/models/ach_transfer.rbi
+++ b/rbi/lib/increase/models/ach_transfer.rbi
@@ -80,6 +80,10 @@ module Increase
       sig { returns(T.nilable(String)) }
       attr_accessor :company_entry_description
 
+      # The company ID associated with the transfer.
+      sig { returns(String) }
+      attr_accessor :company_id
+
       # The name by which the recipient knows you.
       sig { returns(T.nilable(String)) }
       attr_accessor :company_name
@@ -254,6 +258,7 @@ module Increase
           company_descriptive_date: T.nilable(String),
           company_discretionary_data: T.nilable(String),
           company_entry_description: T.nilable(String),
+          company_id: String,
           company_name: T.nilable(String),
           created_at: Time,
           created_by: T.nilable(T.any(Increase::Models::ACHTransfer::CreatedBy, Increase::Internal::AnyHash)),
@@ -293,6 +298,7 @@ module Increase
         company_descriptive_date:,
         company_discretionary_data:,
         company_entry_description:,
+        company_id:,
         company_name:,
         created_at:,
         created_by:,
@@ -333,6 +339,7 @@ module Increase
               company_descriptive_date: T.nilable(String),
               company_discretionary_data: T.nilable(String),
               company_entry_description: T.nilable(String),
+              company_id: String,
               company_name: T.nilable(String),
               created_at: Time,
               created_by: T.nilable(Increase::Models::ACHTransfer::CreatedBy),
diff --git a/sig/increase/internal.rbs b/sig/increase/internal.rbs
index 62a4cd041..871f40835 100644
--- a/sig/increase/internal.rbs
+++ b/sig/increase/internal.rbs
@@ -1,5 +1,5 @@
 module Increase
   module Internal
-    OMIT: top
+    OMIT: Object
   end
 end
diff --git a/sig/increase/internal/type/array_of.rbs b/sig/increase/internal/type/array_of.rbs
index 795f04892..74338ff85 100644
--- a/sig/increase/internal/type/array_of.rbs
+++ b/sig/increase/internal/type/array_of.rbs
@@ -35,6 +35,8 @@ module Increase
           | Increase::Internal::Type::Converter::input type_info,
           ?::Hash[Symbol, top] spec
         ) -> void
+
+        def inspect: (?depth: Integer) -> String
       end
     end
   end
diff --git a/sig/increase/internal/type/base_model.rbs b/sig/increase/internal/type/base_model.rbs
index 9980f9e60..a72dd5a1b 100644
--- a/sig/increase/internal/type/base_model.rbs
+++ b/sig/increase/internal/type/base_model.rbs
@@ -75,6 +75,8 @@ module Increase
 
         def initialize: (?::Hash[Symbol, top] | self data) -> void
 
+        def self.inspect: (?depth: Integer) -> String
+
         def inspect: -> String
       end
     end
diff --git a/sig/increase/internal/type/converter.rbs b/sig/increase/internal/type/converter.rbs
index c13aae74b..9d3581664 100644
--- a/sig/increase/internal/type/converter.rbs
+++ b/sig/increase/internal/type/converter.rbs
@@ -23,6 +23,8 @@ module Increase
           state: Increase::Internal::Type::Converter::dump_state
         ) -> top
 
+        def inspect: (?depth: Integer) -> String
+
         def self.type_info: (
           {
             const: (nil | bool | Integer | Float | Symbol)?,
@@ -44,6 +46,8 @@ module Increase
           top value,
           ?state: Increase::Internal::Type::Converter::dump_state
         ) -> top
+
+        def self.inspect: (top target, depth: Integer) -> String
       end
     end
   end
diff --git a/sig/increase/internal/type/enum.rbs b/sig/increase/internal/type/enum.rbs
index 34ec9c8d3..3e1bfafd1 100644
--- a/sig/increase/internal/type/enum.rbs
+++ b/sig/increase/internal/type/enum.rbs
@@ -21,6 +21,8 @@ module Increase
           Symbol | top value,
           state: Increase::Internal::Type::Converter::dump_state
         ) -> (Symbol | top)
+
+        def inspect: (?depth: Integer) -> String
       end
     end
   end
diff --git a/sig/increase/internal/type/hash_of.rbs b/sig/increase/internal/type/hash_of.rbs
index 88c63c9da..50221ea0c 100644
--- a/sig/increase/internal/type/hash_of.rbs
+++ b/sig/increase/internal/type/hash_of.rbs
@@ -35,6 +35,8 @@ module Increase
           | Increase::Internal::Type::Converter::input type_info,
           ?::Hash[Symbol, top] spec
         ) -> void
+
+        def inspect: (?depth: Integer) -> String
       end
     end
   end
diff --git a/sig/increase/internal/type/union.rbs b/sig/increase/internal/type/union.rbs
index 8f2219295..2b07fec48 100644
--- a/sig/increase/internal/type/union.rbs
+++ b/sig/increase/internal/type/union.rbs
@@ -39,6 +39,8 @@ module Increase
           top value,
           state: Increase::Internal::Type::Converter::dump_state
         ) -> top
+
+        def inspect: (?depth: Integer) -> String
       end
     end
   end
diff --git a/sig/increase/models/ach_transfer.rbs b/sig/increase/models/ach_transfer.rbs
index a55998b5a..7334103c0 100644
--- a/sig/increase/models/ach_transfer.rbs
+++ b/sig/increase/models/ach_transfer.rbs
@@ -13,6 +13,7 @@ module Increase
         company_descriptive_date: String?,
         company_discretionary_data: String?,
         company_entry_description: String?,
+        company_id: String,
         company_name: String?,
         created_at: Time,
         created_by: Increase::Models::ACHTransfer::CreatedBy?,
@@ -62,6 +63,8 @@ module Increase
 
       attr_accessor company_entry_description: String?
 
+      attr_accessor company_id: String
+
       attr_accessor company_name: String?
 
       attr_accessor created_at: Time
@@ -122,6 +125,7 @@ module Increase
         company_descriptive_date: String?,
         company_discretionary_data: String?,
         company_entry_description: String?,
+        company_id: String,
         company_name: String?,
         created_at: Time,
         created_by: Increase::Models::ACHTransfer::CreatedBy?,
diff --git a/test/increase/internal/type/base_model_test.rb b/test/increase/internal/type/base_model_test.rb
index ab9bc43d0..4cf104bfd 100644
--- a/test/increase/internal/type/base_model_test.rb
+++ b/test/increase/internal/type/base_model_test.rb
@@ -154,6 +154,12 @@ def test_dump_retry
 end
 
 class Increase::Test::EnumModelTest < Minitest::Test
+  class E0
+    include Increase::Internal::Type::Enum
+
+    def initialize(*values) = (@values = values)
+  end
+
   module E1
     extend Increase::Internal::Type::Enum
 
@@ -183,6 +189,10 @@ module E4
 
   def test_coerce
     cases = {
+      [E0.new, "one"] => [{no: 1}, "one"],
+      [E0.new(:one), "one"] => [{yes: 1}, :one],
+      [E0.new(:two), "one"] => [{maybe: 1}, "one"],
+
       # rubocop:disable Lint/BooleanSymbol
       [E1, true] => [{yes: 1}, true],
       [E1, false] => [{no: 1}, false],
@@ -432,8 +442,10 @@ def test_accessors
 end
 
 class Increase::Test::UnionTest < Minitest::Test
-  module U0
-    extend Increase::Internal::Type::Union
+  class U0
+    include Increase::Internal::Type::Union
+
+    def initialize(*variants) = variants.each { variant(_1) }
   end
 
   module U1
@@ -519,6 +531,11 @@ def test_coerce
     cases = {
       [U0, :""] => [{no: 1}, 0, :""],
 
+      [U0.new(Integer, Float), "one"] => [{no: 1}, 2, "one"],
+      [U0.new(Integer, Float), 1.0] => [{yes: 1}, 2, 1.0],
+      [U0.new({const: :a}), "a"] => [{yes: 1}, 1, :a],
+      [U0.new({const: :a}), "2"] => [{maybe: 1}, 1, "2"],
+
       [U1, "a"] => [{yes: 1}, 1, :a],
       [U1, "2"] => [{maybe: 1}, 2, "2"],
       [U1, :b] => [{maybe: 1}, 2, :b],
@@ -556,6 +573,12 @@ def test_coerce
 end
 
 class Increase::Test::BaseModelQoLTest < Minitest::Test
+  class E0
+    include Increase::Internal::Type::Enum
+
+    def initialize(*values) = (@values = values)
+  end
+
   module E1
     extend Increase::Internal::Type::Enum
 
@@ -575,6 +598,26 @@ module E3
     B = 3
   end
 
+  class U0
+    include Increase::Internal::Type::Union
+
+    def initialize(*variants) = variants.each { variant(_1) }
+  end
+
+  module U1
+    extend Increase::Internal::Type::Union
+
+    variant String
+    variant Integer
+  end
+
+  module U2
+    extend Increase::Internal::Type::Union
+
+    variant String
+    variant Integer
+  end
+
   class M1 < Increase::Internal::Type::BaseModel
     required :a, Integer
   end
@@ -592,8 +635,15 @@ def test_equality
       [Increase::Internal::Type::Unknown, Increase::Internal::Type::Unknown] => true,
       [Increase::Internal::Type::Boolean, Increase::Internal::Type::Boolean] => true,
       [Increase::Internal::Type::Unknown, Increase::Internal::Type::Boolean] => false,
+      [E0.new(:a, :b), E0.new(:a, :b)] => true,
+      [E0.new(:a, :b), E0.new(:b, :a)] => true,
+      [E0.new(:a, :b), E0.new(:b, :c)] => false,
       [E1, E2] => true,
       [E1, E3] => false,
+      [U0.new(String, Integer), U0.new(String, Integer)] => true,
+      [U0.new(String, Integer), U0.new(Integer, String)] => false,
+      [U0.new(String, Float), U0.new(String, Integer)] => false,
+      [U1, U2] => true,
       [M1, M2] => false,
       [M1, M3] => true
     }
diff --git a/test/increase/resources/ach_transfers_test.rb b/test/increase/resources/ach_transfers_test.rb
index 873f4609e..e001b4311 100644
--- a/test/increase/resources/ach_transfers_test.rb
+++ b/test/increase/resources/ach_transfers_test.rb
@@ -28,6 +28,7 @@ def test_create_required_params
         company_descriptive_date: String | nil,
         company_discretionary_data: String | nil,
         company_entry_description: String | nil,
+        company_id: String,
         company_name: String | nil,
         created_at: Time,
         created_by: Increase::Models::ACHTransfer::CreatedBy | nil,
@@ -76,6 +77,7 @@ def test_retrieve
         company_descriptive_date: String | nil,
         company_discretionary_data: String | nil,
         company_entry_description: String | nil,
+        company_id: String,
         company_name: String | nil,
         created_at: Time,
         created_by: Increase::Models::ACHTransfer::CreatedBy | nil,
@@ -131,6 +133,7 @@ def test_list
         company_descriptive_date: String | nil,
         company_discretionary_data: String | nil,
         company_entry_description: String | nil,
+        company_id: String,
         company_name: String | nil,
         created_at: Time,
         created_by: Increase::Models::ACHTransfer::CreatedBy | nil,
@@ -179,6 +182,7 @@ def test_approve
         company_descriptive_date: String | nil,
         company_discretionary_data: String | nil,
         company_entry_description: String | nil,
+        company_id: String,
         company_name: String | nil,
         created_at: Time,
         created_by: Increase::Models::ACHTransfer::CreatedBy | nil,
@@ -227,6 +231,7 @@ def test_cancel
         company_descriptive_date: String | nil,
         company_discretionary_data: String | nil,
         company_entry_description: String | nil,
+        company_id: String,
         company_name: String | nil,
         created_at: Time,
         created_by: Increase::Models::ACHTransfer::CreatedBy | nil,
diff --git a/test/increase/resources/simulations/ach_transfers_test.rb b/test/increase/resources/simulations/ach_transfers_test.rb
index 61959c2dc..716a99c08 100644
--- a/test/increase/resources/simulations/ach_transfers_test.rb
+++ b/test/increase/resources/simulations/ach_transfers_test.rb
@@ -23,6 +23,7 @@ def test_acknowledge
         company_descriptive_date: String | nil,
         company_discretionary_data: String | nil,
         company_entry_description: String | nil,
+        company_id: String,
         company_name: String | nil,
         created_at: Time,
         created_by: Increase::Models::ACHTransfer::CreatedBy | nil,
@@ -76,6 +77,7 @@ def test_create_notification_of_change_required_params
         company_descriptive_date: String | nil,
         company_discretionary_data: String | nil,
         company_entry_description: String | nil,
+        company_id: String,
         company_name: String | nil,
         created_at: Time,
         created_by: Increase::Models::ACHTransfer::CreatedBy | nil,
@@ -124,6 +126,7 @@ def test_return_
         company_descriptive_date: String | nil,
         company_discretionary_data: String | nil,
         company_entry_description: String | nil,
+        company_id: String,
         company_name: String | nil,
         created_at: Time,
         created_by: Increase::Models::ACHTransfer::CreatedBy | nil,
@@ -172,6 +175,7 @@ def test_settle
         company_descriptive_date: String | nil,
         company_discretionary_data: String | nil,
         company_entry_description: String | nil,
+        company_id: String,
         company_name: String | nil,
         created_at: Time,
         created_by: Increase::Models::ACHTransfer::CreatedBy | nil,
@@ -220,6 +224,7 @@ def test_submit
         company_descriptive_date: String | nil,
         company_discretionary_data: String | nil,
         company_entry_description: String | nil,
+        company_id: String,
         company_name: String | nil,
         created_at: Time,
         created_by: Increase::Models::ACHTransfer::CreatedBy | nil,