diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,367 @@
+Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+    means the combination of the Contributions of others (if any) used
+    by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+    means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
diff --git a/README.md b/README.md
new file mode 100644
--- /dev/null
+++ b/README.md
@@ -0,0 +1,44 @@
+# Amazon AppConfig Data SDK
+
+* [Version](#version)
+* [Description](#description)
+* [Contribute](#contribute)
+* [Licence](#licence)
+
+
+## Version
+ 
+`2.0` - Derived from API version @2021-11-11@ of the AWS service descriptions, licensed under Apache 2.0.
+
+## Description
+
+Documentation is available via [Hackage](http://hackage.haskell.org/package/amazonka-appconfigdata)
+and the [AWS API Reference](https://aws.amazon.com/documentation/).
+
+The types from this library are intended to be used with [amazonka](http://hackage.haskell.org/package/amazonka),
+which provides mechanisms for specifying AuthN/AuthZ information, sending requests,
+and receiving responses.
+
+Lenses are used for constructing and manipulating types,
+due to the depth of nesting of AWS types and transparency regarding
+de/serialisation into more palatable Haskell values.
+The provided lenses should be compatible with any of the major lens libraries
+[lens](http://hackage.haskell.org/package/lens) or [lens-family-core](http://hackage.haskell.org/package/lens-family-core).
+
+See [Amazonka.AppConfigData](http://hackage.haskell.org/package/amazonka-appconfigdata/docs/Amazonka-AppConfigData.html)
+or [the AWS documentation](https://aws.amazon.com/documentation/) to get started.
+
+
+## Contribute
+
+For any problems, comments, or feedback please create an issue [here on GitHub](https://github.com/brendanhay/amazonka/issues).
+
+> _Note:_ this library is an auto-generated Haskell package. Please see `amazonka-gen` for more information.
+
+
+## Licence
+
+`amazonka-appconfigdata` is released under the [Mozilla Public License Version 2.0](http://www.mozilla.org/MPL/).
+
+Parts of the code are derived from AWS service descriptions, licensed under Apache 2.0.
+Source files subject to this contain an additional licensing clause in their header.
diff --git a/amazonka-appconfigdata.cabal b/amazonka-appconfigdata.cabal
new file mode 100644
--- /dev/null
+++ b/amazonka-appconfigdata.cabal
@@ -0,0 +1,85 @@
+cabal-version:      2.2
+name:               amazonka-appconfigdata
+version:            2.0
+synopsis:           Amazon AppConfig Data SDK.
+homepage:           https://github.com/brendanhay/amazonka
+bug-reports:        https://github.com/brendanhay/amazonka/issues
+license:            MPL-2.0
+license-file:       LICENSE
+author:             Brendan Hay
+maintainer:
+  Brendan Hay <brendan.g.hay+amazonka@gmail.com>, Jack Kelly <jack@jackkelly.name>
+
+copyright:          Copyright (c) 2013-2023 Brendan Hay
+category:           AWS
+build-type:         Simple
+extra-source-files:
+  fixture/*.proto
+  fixture/*.yaml
+  README.md
+  src/.gitkeep
+
+description:
+  Derived from API version @2021-11-11@ of the AWS service descriptions, licensed under Apache 2.0.
+  .
+  The types from this library are intended to be used with <http://hackage.haskell.org/package/amazonka amazonka>,
+  which provides mechanisms for specifying AuthN/AuthZ information, sending requests, and receiving responses.
+  .
+  It is recommended to use generic lenses or optics from packages such as <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify optional fields and deconstruct responses.
+  .
+  Generated lenses can be found in "Amazonka.AppConfigData.Lens" and are
+  suitable for use with a lens package such as <http://hackage.haskell.org/package/lens lens> or <http://hackage.haskell.org/package/lens-family-core lens-family-core>.
+  .
+  See "Amazonka.AppConfigData" and the <https://aws.amazon.com/documentation/ AWS documentation> to get started.
+
+source-repository head
+  type:     git
+  location: git://github.com/brendanhay/amazonka.git
+  subdir:   amazonka-appconfigdata
+
+library
+  default-language: Haskell2010
+  hs-source-dirs:   src gen
+  ghc-options:
+    -Wall -fwarn-incomplete-uni-patterns
+    -fwarn-incomplete-record-updates -funbox-strict-fields
+
+  exposed-modules:
+    Amazonka.AppConfigData
+    Amazonka.AppConfigData.GetLatestConfiguration
+    Amazonka.AppConfigData.Lens
+    Amazonka.AppConfigData.StartConfigurationSession
+    Amazonka.AppConfigData.Types
+    Amazonka.AppConfigData.Waiters
+
+  build-depends:
+    , amazonka-core  >=2.0  && <2.1
+    , base           >=4.12 && <5
+
+test-suite amazonka-appconfigdata-test
+  type:             exitcode-stdio-1.0
+  default-language: Haskell2010
+  hs-source-dirs:   test
+  main-is:          Main.hs
+  ghc-options:      -Wall -threaded
+
+  -- This section is encoded by the template and any modules added by
+  -- hand outside these namespaces will not correctly be added to the
+  -- distribution package.
+  other-modules:
+    Test.Amazonka.AppConfigData
+    Test.Amazonka.AppConfigData.Internal
+    Test.Amazonka.Gen.AppConfigData
+
+  build-depends:
+    , amazonka-appconfigdata
+    , amazonka-core           >=2.0 && <2.1
+    , amazonka-test           >=2.0 && <2.1
+    , base
+    , bytestring
+    , case-insensitive
+    , tasty
+    , tasty-hunit
+    , text
+    , time
+    , unordered-containers
diff --git a/fixture/GetLatestConfiguration.yaml b/fixture/GetLatestConfiguration.yaml
new file mode 100644
--- /dev/null
+++ b/fixture/GetLatestConfiguration.yaml
@@ -0,0 +1,10 @@
+---
+method: GET
+headers:
+  Authorization:         AWS4-HMAC-SHA256 Credential=access/20091028/us-east-1/appconfigdata/aws4_request, SignedHeaders=content-type;host;x-amz-content-sha256;x-amz-date, Signature=?
+  Host:                  appconfigdata.us-east-1.amazonaws.com
+  Content-Type:          application/x-www-form-urlencoded; charset=utf-8
+  X-Amz-Content-SHA256:  abcdef
+  X-Amz-Date:            20091028T223200Z
+body:
+  ''
diff --git a/fixture/GetLatestConfigurationResponse.proto b/fixture/GetLatestConfigurationResponse.proto
new file mode 100644
--- /dev/null
+++ b/fixture/GetLatestConfigurationResponse.proto
diff --git a/fixture/StartConfigurationSession.yaml b/fixture/StartConfigurationSession.yaml
new file mode 100644
--- /dev/null
+++ b/fixture/StartConfigurationSession.yaml
@@ -0,0 +1,10 @@
+---
+method: POST
+headers:
+  Authorization:         AWS4-HMAC-SHA256 Credential=access/20091028/us-east-1/appconfigdata/aws4_request, SignedHeaders=content-type;host;x-amz-content-sha256;x-amz-date, Signature=?
+  Host:                  appconfigdata.us-east-1.amazonaws.com
+  Content-Type:          application/x-www-form-urlencoded; charset=utf-8
+  X-Amz-Content-SHA256:  abcdef
+  X-Amz-Date:            20091028T223200Z
+body:
+  ''
diff --git a/fixture/StartConfigurationSessionResponse.proto b/fixture/StartConfigurationSessionResponse.proto
new file mode 100644
--- /dev/null
+++ b/fixture/StartConfigurationSessionResponse.proto
diff --git a/gen/Amazonka/AppConfigData.hs b/gen/Amazonka/AppConfigData.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/AppConfigData.hs
@@ -0,0 +1,130 @@
+{-# OPTIONS_GHC -fno-warn-duplicate-exports #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+
+-- |
+-- Module      : Amazonka.AppConfigData
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+--
+-- Derived from API version @2021-11-11@ of the AWS service descriptions, licensed under Apache 2.0.
+--
+-- AppConfig Data provides the data plane APIs your application uses to
+-- retrieve configuration data. Here\'s how it works:
+--
+-- Your application retrieves configuration data by first establishing a
+-- configuration session using the AppConfig Data StartConfigurationSession
+-- API action. Your session\'s client then makes periodic calls to
+-- GetLatestConfiguration to check for and retrieve the latest data
+-- available.
+--
+-- When calling @StartConfigurationSession@, your code sends the following
+-- information:
+--
+-- -   Identifiers (ID or name) of an AppConfig application, environment,
+--     and configuration profile that the session tracks.
+--
+-- -   (Optional) The minimum amount of time the session\'s client must
+--     wait between calls to @GetLatestConfiguration@.
+--
+-- In response, AppConfig provides an @InitialConfigurationToken@ to be
+-- given to the session\'s client and used the first time it calls
+-- @GetLatestConfiguration@ for that session.
+--
+-- When calling @GetLatestConfiguration@, your client code sends the most
+-- recent @ConfigurationToken@ value it has and receives in response:
+--
+-- -   @NextPollConfigurationToken@: the @ConfigurationToken@ value to use
+--     on the next call to @GetLatestConfiguration@.
+--
+-- -   @NextPollIntervalInSeconds@: the duration the client should wait
+--     before making its next call to @GetLatestConfiguration@. This
+--     duration may vary over the course of the session, so it should be
+--     used instead of the value sent on the @StartConfigurationSession@
+--     call.
+--
+-- -   The configuration: the latest data intended for the session. This
+--     may be empty if the client already has the latest version of the
+--     configuration.
+--
+-- For more information and to view example CLI commands that show how to
+-- retrieve a configuration using the AppConfig Data
+-- @StartConfigurationSession@ and @GetLatestConfiguration@ API actions,
+-- see
+-- <http://docs.aws.amazon.com/appconfig/latest/userguide/appconfig-retrieving-the-configuration Receiving the configuration>
+-- in the /AppConfig User Guide/.
+module Amazonka.AppConfigData
+  ( -- * Service Configuration
+    defaultService,
+
+    -- * Errors
+    -- $errors
+
+    -- ** BadRequestException
+    _BadRequestException,
+
+    -- ** InternalServerException
+    _InternalServerException,
+
+    -- ** ResourceNotFoundException
+    _ResourceNotFoundException,
+
+    -- ** ThrottlingException
+    _ThrottlingException,
+
+    -- * Waiters
+    -- $waiters
+
+    -- * Operations
+    -- $operations
+
+    -- ** GetLatestConfiguration
+    GetLatestConfiguration (GetLatestConfiguration'),
+    newGetLatestConfiguration,
+    GetLatestConfigurationResponse (GetLatestConfigurationResponse'),
+    newGetLatestConfigurationResponse,
+
+    -- ** StartConfigurationSession
+    StartConfigurationSession (StartConfigurationSession'),
+    newStartConfigurationSession,
+    StartConfigurationSessionResponse (StartConfigurationSessionResponse'),
+    newStartConfigurationSessionResponse,
+
+    -- * Types
+  )
+where
+
+import Amazonka.AppConfigData.GetLatestConfiguration
+import Amazonka.AppConfigData.Lens
+import Amazonka.AppConfigData.StartConfigurationSession
+import Amazonka.AppConfigData.Types
+import Amazonka.AppConfigData.Waiters
+
+-- $errors
+-- Error matchers are designed for use with the functions provided by
+-- <http://hackage.haskell.org/package/lens/docs/Control-Exception-Lens.html Control.Exception.Lens>.
+-- This allows catching (and rethrowing) service specific errors returned
+-- by 'AppConfigData'.
+
+-- $operations
+-- Some AWS operations return results that are incomplete and require subsequent
+-- requests in order to obtain the entire result set. The process of sending
+-- subsequent requests to continue where a previous request left off is called
+-- pagination. For example, the 'ListObjects' operation of Amazon S3 returns up to
+-- 1000 objects at a time, and you must send subsequent requests with the
+-- appropriate Marker in order to retrieve the next page of results.
+--
+-- Operations that have an 'AWSPager' instance can transparently perform subsequent
+-- requests, correctly setting Markers and other request facets to iterate through
+-- the entire result set of a truncated API operation. Operations which support
+-- this have an additional note in the documentation.
+--
+-- Many operations have the ability to filter results on the server side. See the
+-- individual operation parameters for details.
+
+-- $waiters
+-- Waiters poll by repeatedly sending a request until some remote success condition
+-- configured by the 'Wait' specification is fulfilled. The 'Wait' specification
+-- determines how many attempts should be made, in addition to delay and retry strategies.
diff --git a/gen/Amazonka/AppConfigData/GetLatestConfiguration.hs b/gen/Amazonka/AppConfigData/GetLatestConfiguration.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/AppConfigData/GetLatestConfiguration.hs
@@ -0,0 +1,247 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-binds #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.AppConfigData.GetLatestConfiguration
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+--
+-- Retrieves the latest deployed configuration. This API may return empty
+-- configuration data if the client already has the latest version. For
+-- more information about this API action and to view example CLI commands
+-- that show how to use it with the StartConfigurationSession API action,
+-- see
+-- <http://docs.aws.amazon.com/appconfig/latest/userguide/appconfig-retrieving-the-configuration Receiving the configuration>
+-- in the /AppConfig User Guide/.
+--
+-- Note the following important information.
+--
+-- -   Each configuration token is only valid for one call to
+--     @GetLatestConfiguration@. The @GetLatestConfiguration@ response
+--     includes a @NextPollConfigurationToken@ that should always replace
+--     the token used for the just-completed call in preparation for the
+--     next one.
+--
+-- -   @GetLatestConfiguration@ is a priced call. For more information, see
+--     <https://aws.amazon.com/systems-manager/pricing/ Pricing>.
+module Amazonka.AppConfigData.GetLatestConfiguration
+  ( -- * Creating a Request
+    GetLatestConfiguration (..),
+    newGetLatestConfiguration,
+
+    -- * Request Lenses
+    getLatestConfiguration_configurationToken,
+
+    -- * Destructuring the Response
+    GetLatestConfigurationResponse (..),
+    newGetLatestConfigurationResponse,
+
+    -- * Response Lenses
+    getLatestConfigurationResponse_configuration,
+    getLatestConfigurationResponse_contentType,
+    getLatestConfigurationResponse_nextPollConfigurationToken,
+    getLatestConfigurationResponse_nextPollIntervalInSeconds,
+    getLatestConfigurationResponse_httpStatus,
+  )
+where
+
+import Amazonka.AppConfigData.Types
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+import qualified Amazonka.Request as Request
+import qualified Amazonka.Response as Response
+
+-- | /See:/ 'newGetLatestConfiguration' smart constructor.
+data GetLatestConfiguration = GetLatestConfiguration'
+  { -- | Token describing the current state of the configuration session. To
+    -- obtain a token, first call the StartConfigurationSession API. Note that
+    -- every call to @GetLatestConfiguration@ will return a new
+    -- @ConfigurationToken@ (@NextPollConfigurationToken@ in the response) and
+    -- MUST be provided to subsequent @GetLatestConfiguration@ API calls.
+    configurationToken :: Prelude.Text
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'GetLatestConfiguration' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'configurationToken', 'getLatestConfiguration_configurationToken' - Token describing the current state of the configuration session. To
+-- obtain a token, first call the StartConfigurationSession API. Note that
+-- every call to @GetLatestConfiguration@ will return a new
+-- @ConfigurationToken@ (@NextPollConfigurationToken@ in the response) and
+-- MUST be provided to subsequent @GetLatestConfiguration@ API calls.
+newGetLatestConfiguration ::
+  -- | 'configurationToken'
+  Prelude.Text ->
+  GetLatestConfiguration
+newGetLatestConfiguration pConfigurationToken_ =
+  GetLatestConfiguration'
+    { configurationToken =
+        pConfigurationToken_
+    }
+
+-- | Token describing the current state of the configuration session. To
+-- obtain a token, first call the StartConfigurationSession API. Note that
+-- every call to @GetLatestConfiguration@ will return a new
+-- @ConfigurationToken@ (@NextPollConfigurationToken@ in the response) and
+-- MUST be provided to subsequent @GetLatestConfiguration@ API calls.
+getLatestConfiguration_configurationToken :: Lens.Lens' GetLatestConfiguration Prelude.Text
+getLatestConfiguration_configurationToken = Lens.lens (\GetLatestConfiguration' {configurationToken} -> configurationToken) (\s@GetLatestConfiguration' {} a -> s {configurationToken = a} :: GetLatestConfiguration)
+
+instance Core.AWSRequest GetLatestConfiguration where
+  type
+    AWSResponse GetLatestConfiguration =
+      GetLatestConfigurationResponse
+  request overrides =
+    Request.get (overrides defaultService)
+  response =
+    Response.receiveBytes
+      ( \s h x ->
+          GetLatestConfigurationResponse'
+            Prelude.<$> (Prelude.pure (Prelude.Just (Prelude.coerce x)))
+            Prelude.<*> (h Data..#? "Content-Type")
+            Prelude.<*> (h Data..#? "Next-Poll-Configuration-Token")
+            Prelude.<*> (h Data..#? "Next-Poll-Interval-In-Seconds")
+            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
+      )
+
+instance Prelude.Hashable GetLatestConfiguration where
+  hashWithSalt _salt GetLatestConfiguration' {..} =
+    _salt `Prelude.hashWithSalt` configurationToken
+
+instance Prelude.NFData GetLatestConfiguration where
+  rnf GetLatestConfiguration' {..} =
+    Prelude.rnf configurationToken
+
+instance Data.ToHeaders GetLatestConfiguration where
+  toHeaders =
+    Prelude.const
+      ( Prelude.mconcat
+          [ "Content-Type"
+              Data.=# ( "application/x-amz-json-1.0" ::
+                          Prelude.ByteString
+                      )
+          ]
+      )
+
+instance Data.ToPath GetLatestConfiguration where
+  toPath = Prelude.const "/configuration"
+
+instance Data.ToQuery GetLatestConfiguration where
+  toQuery GetLatestConfiguration' {..} =
+    Prelude.mconcat
+      ["configuration_token" Data.=: configurationToken]
+
+-- | /See:/ 'newGetLatestConfigurationResponse' smart constructor.
+data GetLatestConfigurationResponse = GetLatestConfigurationResponse'
+  { -- | The data of the configuration. This may be empty if the client already
+    -- has the latest version of configuration.
+    configuration :: Prelude.Maybe (Data.Sensitive Prelude.ByteString),
+    -- | A standard MIME type describing the format of the configuration content.
+    contentType :: Prelude.Maybe Prelude.Text,
+    -- | The latest token describing the current state of the configuration
+    -- session. This MUST be provided to the next call to
+    -- @GetLatestConfiguration.@
+    nextPollConfigurationToken :: Prelude.Maybe Prelude.Text,
+    -- | The amount of time the client should wait before polling for
+    -- configuration updates again. Use @RequiredMinimumPollIntervalInSeconds@
+    -- to set the desired poll interval.
+    nextPollIntervalInSeconds :: Prelude.Maybe Prelude.Int,
+    -- | The response's http status code.
+    httpStatus :: Prelude.Int
+  }
+  deriving (Prelude.Eq, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'GetLatestConfigurationResponse' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'configuration', 'getLatestConfigurationResponse_configuration' - The data of the configuration. This may be empty if the client already
+-- has the latest version of configuration.
+--
+-- 'contentType', 'getLatestConfigurationResponse_contentType' - A standard MIME type describing the format of the configuration content.
+--
+-- 'nextPollConfigurationToken', 'getLatestConfigurationResponse_nextPollConfigurationToken' - The latest token describing the current state of the configuration
+-- session. This MUST be provided to the next call to
+-- @GetLatestConfiguration.@
+--
+-- 'nextPollIntervalInSeconds', 'getLatestConfigurationResponse_nextPollIntervalInSeconds' - The amount of time the client should wait before polling for
+-- configuration updates again. Use @RequiredMinimumPollIntervalInSeconds@
+-- to set the desired poll interval.
+--
+-- 'httpStatus', 'getLatestConfigurationResponse_httpStatus' - The response's http status code.
+newGetLatestConfigurationResponse ::
+  -- | 'httpStatus'
+  Prelude.Int ->
+  GetLatestConfigurationResponse
+newGetLatestConfigurationResponse pHttpStatus_ =
+  GetLatestConfigurationResponse'
+    { configuration =
+        Prelude.Nothing,
+      contentType = Prelude.Nothing,
+      nextPollConfigurationToken =
+        Prelude.Nothing,
+      nextPollIntervalInSeconds = Prelude.Nothing,
+      httpStatus = pHttpStatus_
+    }
+
+-- | The data of the configuration. This may be empty if the client already
+-- has the latest version of configuration.
+getLatestConfigurationResponse_configuration :: Lens.Lens' GetLatestConfigurationResponse (Prelude.Maybe Prelude.ByteString)
+getLatestConfigurationResponse_configuration = Lens.lens (\GetLatestConfigurationResponse' {configuration} -> configuration) (\s@GetLatestConfigurationResponse' {} a -> s {configuration = a} :: GetLatestConfigurationResponse) Prelude.. Lens.mapping Data._Sensitive
+
+-- | A standard MIME type describing the format of the configuration content.
+getLatestConfigurationResponse_contentType :: Lens.Lens' GetLatestConfigurationResponse (Prelude.Maybe Prelude.Text)
+getLatestConfigurationResponse_contentType = Lens.lens (\GetLatestConfigurationResponse' {contentType} -> contentType) (\s@GetLatestConfigurationResponse' {} a -> s {contentType = a} :: GetLatestConfigurationResponse)
+
+-- | The latest token describing the current state of the configuration
+-- session. This MUST be provided to the next call to
+-- @GetLatestConfiguration.@
+getLatestConfigurationResponse_nextPollConfigurationToken :: Lens.Lens' GetLatestConfigurationResponse (Prelude.Maybe Prelude.Text)
+getLatestConfigurationResponse_nextPollConfigurationToken = Lens.lens (\GetLatestConfigurationResponse' {nextPollConfigurationToken} -> nextPollConfigurationToken) (\s@GetLatestConfigurationResponse' {} a -> s {nextPollConfigurationToken = a} :: GetLatestConfigurationResponse)
+
+-- | The amount of time the client should wait before polling for
+-- configuration updates again. Use @RequiredMinimumPollIntervalInSeconds@
+-- to set the desired poll interval.
+getLatestConfigurationResponse_nextPollIntervalInSeconds :: Lens.Lens' GetLatestConfigurationResponse (Prelude.Maybe Prelude.Int)
+getLatestConfigurationResponse_nextPollIntervalInSeconds = Lens.lens (\GetLatestConfigurationResponse' {nextPollIntervalInSeconds} -> nextPollIntervalInSeconds) (\s@GetLatestConfigurationResponse' {} a -> s {nextPollIntervalInSeconds = a} :: GetLatestConfigurationResponse)
+
+-- | The response's http status code.
+getLatestConfigurationResponse_httpStatus :: Lens.Lens' GetLatestConfigurationResponse Prelude.Int
+getLatestConfigurationResponse_httpStatus = Lens.lens (\GetLatestConfigurationResponse' {httpStatus} -> httpStatus) (\s@GetLatestConfigurationResponse' {} a -> s {httpStatus = a} :: GetLatestConfigurationResponse)
+
+instance
+  Prelude.NFData
+    GetLatestConfigurationResponse
+  where
+  rnf GetLatestConfigurationResponse' {..} =
+    Prelude.rnf configuration
+      `Prelude.seq` Prelude.rnf contentType
+      `Prelude.seq` Prelude.rnf nextPollConfigurationToken
+      `Prelude.seq` Prelude.rnf nextPollIntervalInSeconds
+      `Prelude.seq` Prelude.rnf httpStatus
diff --git a/gen/Amazonka/AppConfigData/Lens.hs b/gen/Amazonka/AppConfigData/Lens.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/AppConfigData/Lens.hs
@@ -0,0 +1,38 @@
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-duplicate-exports #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.AppConfigData.Lens
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.AppConfigData.Lens
+  ( -- * Operations
+
+    -- ** GetLatestConfiguration
+    getLatestConfiguration_configurationToken,
+    getLatestConfigurationResponse_configuration,
+    getLatestConfigurationResponse_contentType,
+    getLatestConfigurationResponse_nextPollConfigurationToken,
+    getLatestConfigurationResponse_nextPollIntervalInSeconds,
+    getLatestConfigurationResponse_httpStatus,
+
+    -- ** StartConfigurationSession
+    startConfigurationSession_requiredMinimumPollIntervalInSeconds,
+    startConfigurationSession_applicationIdentifier,
+    startConfigurationSession_environmentIdentifier,
+    startConfigurationSession_configurationProfileIdentifier,
+    startConfigurationSessionResponse_initialConfigurationToken,
+    startConfigurationSessionResponse_httpStatus,
+
+    -- * Types
+  )
+where
+
+import Amazonka.AppConfigData.GetLatestConfiguration
+import Amazonka.AppConfigData.StartConfigurationSession
diff --git a/gen/Amazonka/AppConfigData/StartConfigurationSession.hs b/gen/Amazonka/AppConfigData/StartConfigurationSession.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/AppConfigData/StartConfigurationSession.hs
@@ -0,0 +1,262 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-binds #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.AppConfigData.StartConfigurationSession
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+--
+-- Starts a configuration session used to retrieve a deployed
+-- configuration. For more information about this API action and to view
+-- example CLI commands that show how to use it with the
+-- GetLatestConfiguration API action, see
+-- <http://docs.aws.amazon.com/appconfig/latest/userguide/appconfig-retrieving-the-configuration Receiving the configuration>
+-- in the /AppConfig User Guide/.
+module Amazonka.AppConfigData.StartConfigurationSession
+  ( -- * Creating a Request
+    StartConfigurationSession (..),
+    newStartConfigurationSession,
+
+    -- * Request Lenses
+    startConfigurationSession_requiredMinimumPollIntervalInSeconds,
+    startConfigurationSession_applicationIdentifier,
+    startConfigurationSession_environmentIdentifier,
+    startConfigurationSession_configurationProfileIdentifier,
+
+    -- * Destructuring the Response
+    StartConfigurationSessionResponse (..),
+    newStartConfigurationSessionResponse,
+
+    -- * Response Lenses
+    startConfigurationSessionResponse_initialConfigurationToken,
+    startConfigurationSessionResponse_httpStatus,
+  )
+where
+
+import Amazonka.AppConfigData.Types
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+import qualified Amazonka.Request as Request
+import qualified Amazonka.Response as Response
+
+-- | /See:/ 'newStartConfigurationSession' smart constructor.
+data StartConfigurationSession = StartConfigurationSession'
+  { -- | Sets a constraint on a session. If you specify a value of, for example,
+    -- 60 seconds, then the client that established the session can\'t call
+    -- GetLatestConfiguration more frequently then every 60 seconds.
+    requiredMinimumPollIntervalInSeconds :: Prelude.Maybe Prelude.Natural,
+    -- | The application ID or the application name.
+    applicationIdentifier :: Prelude.Text,
+    -- | The environment ID or the environment name.
+    environmentIdentifier :: Prelude.Text,
+    -- | The configuration profile ID or the configuration profile name.
+    configurationProfileIdentifier :: Prelude.Text
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'StartConfigurationSession' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'requiredMinimumPollIntervalInSeconds', 'startConfigurationSession_requiredMinimumPollIntervalInSeconds' - Sets a constraint on a session. If you specify a value of, for example,
+-- 60 seconds, then the client that established the session can\'t call
+-- GetLatestConfiguration more frequently then every 60 seconds.
+--
+-- 'applicationIdentifier', 'startConfigurationSession_applicationIdentifier' - The application ID or the application name.
+--
+-- 'environmentIdentifier', 'startConfigurationSession_environmentIdentifier' - The environment ID or the environment name.
+--
+-- 'configurationProfileIdentifier', 'startConfigurationSession_configurationProfileIdentifier' - The configuration profile ID or the configuration profile name.
+newStartConfigurationSession ::
+  -- | 'applicationIdentifier'
+  Prelude.Text ->
+  -- | 'environmentIdentifier'
+  Prelude.Text ->
+  -- | 'configurationProfileIdentifier'
+  Prelude.Text ->
+  StartConfigurationSession
+newStartConfigurationSession
+  pApplicationIdentifier_
+  pEnvironmentIdentifier_
+  pConfigurationProfileIdentifier_ =
+    StartConfigurationSession'
+      { requiredMinimumPollIntervalInSeconds =
+          Prelude.Nothing,
+        applicationIdentifier = pApplicationIdentifier_,
+        environmentIdentifier = pEnvironmentIdentifier_,
+        configurationProfileIdentifier =
+          pConfigurationProfileIdentifier_
+      }
+
+-- | Sets a constraint on a session. If you specify a value of, for example,
+-- 60 seconds, then the client that established the session can\'t call
+-- GetLatestConfiguration more frequently then every 60 seconds.
+startConfigurationSession_requiredMinimumPollIntervalInSeconds :: Lens.Lens' StartConfigurationSession (Prelude.Maybe Prelude.Natural)
+startConfigurationSession_requiredMinimumPollIntervalInSeconds = Lens.lens (\StartConfigurationSession' {requiredMinimumPollIntervalInSeconds} -> requiredMinimumPollIntervalInSeconds) (\s@StartConfigurationSession' {} a -> s {requiredMinimumPollIntervalInSeconds = a} :: StartConfigurationSession)
+
+-- | The application ID or the application name.
+startConfigurationSession_applicationIdentifier :: Lens.Lens' StartConfigurationSession Prelude.Text
+startConfigurationSession_applicationIdentifier = Lens.lens (\StartConfigurationSession' {applicationIdentifier} -> applicationIdentifier) (\s@StartConfigurationSession' {} a -> s {applicationIdentifier = a} :: StartConfigurationSession)
+
+-- | The environment ID or the environment name.
+startConfigurationSession_environmentIdentifier :: Lens.Lens' StartConfigurationSession Prelude.Text
+startConfigurationSession_environmentIdentifier = Lens.lens (\StartConfigurationSession' {environmentIdentifier} -> environmentIdentifier) (\s@StartConfigurationSession' {} a -> s {environmentIdentifier = a} :: StartConfigurationSession)
+
+-- | The configuration profile ID or the configuration profile name.
+startConfigurationSession_configurationProfileIdentifier :: Lens.Lens' StartConfigurationSession Prelude.Text
+startConfigurationSession_configurationProfileIdentifier = Lens.lens (\StartConfigurationSession' {configurationProfileIdentifier} -> configurationProfileIdentifier) (\s@StartConfigurationSession' {} a -> s {configurationProfileIdentifier = a} :: StartConfigurationSession)
+
+instance Core.AWSRequest StartConfigurationSession where
+  type
+    AWSResponse StartConfigurationSession =
+      StartConfigurationSessionResponse
+  request overrides =
+    Request.postJSON (overrides defaultService)
+  response =
+    Response.receiveJSON
+      ( \s h x ->
+          StartConfigurationSessionResponse'
+            Prelude.<$> (x Data..?> "InitialConfigurationToken")
+            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
+      )
+
+instance Prelude.Hashable StartConfigurationSession where
+  hashWithSalt _salt StartConfigurationSession' {..} =
+    _salt
+      `Prelude.hashWithSalt` requiredMinimumPollIntervalInSeconds
+      `Prelude.hashWithSalt` applicationIdentifier
+      `Prelude.hashWithSalt` environmentIdentifier
+      `Prelude.hashWithSalt` configurationProfileIdentifier
+
+instance Prelude.NFData StartConfigurationSession where
+  rnf StartConfigurationSession' {..} =
+    Prelude.rnf requiredMinimumPollIntervalInSeconds
+      `Prelude.seq` Prelude.rnf applicationIdentifier
+      `Prelude.seq` Prelude.rnf environmentIdentifier
+      `Prelude.seq` Prelude.rnf configurationProfileIdentifier
+
+instance Data.ToHeaders StartConfigurationSession where
+  toHeaders =
+    Prelude.const
+      ( Prelude.mconcat
+          [ "Content-Type"
+              Data.=# ( "application/x-amz-json-1.0" ::
+                          Prelude.ByteString
+                      )
+          ]
+      )
+
+instance Data.ToJSON StartConfigurationSession where
+  toJSON StartConfigurationSession' {..} =
+    Data.object
+      ( Prelude.catMaybes
+          [ ("RequiredMinimumPollIntervalInSeconds" Data..=)
+              Prelude.<$> requiredMinimumPollIntervalInSeconds,
+            Prelude.Just
+              ( "ApplicationIdentifier"
+                  Data..= applicationIdentifier
+              ),
+            Prelude.Just
+              ( "EnvironmentIdentifier"
+                  Data..= environmentIdentifier
+              ),
+            Prelude.Just
+              ( "ConfigurationProfileIdentifier"
+                  Data..= configurationProfileIdentifier
+              )
+          ]
+      )
+
+instance Data.ToPath StartConfigurationSession where
+  toPath = Prelude.const "/configurationsessions"
+
+instance Data.ToQuery StartConfigurationSession where
+  toQuery = Prelude.const Prelude.mempty
+
+-- | /See:/ 'newStartConfigurationSessionResponse' smart constructor.
+data StartConfigurationSessionResponse = StartConfigurationSessionResponse'
+  { -- | Token encapsulating state about the configuration session. Provide this
+    -- token to the @GetLatestConfiguration@ API to retrieve configuration
+    -- data.
+    --
+    -- This token should only be used once in your first call to
+    -- @GetLatestConfiguration@. You MUST use the new token in the
+    -- @GetLatestConfiguration@ response (@NextPollConfigurationToken@) in each
+    -- subsequent call to @GetLatestConfiguration@.
+    initialConfigurationToken :: Prelude.Maybe Prelude.Text,
+    -- | The response's http status code.
+    httpStatus :: Prelude.Int
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'StartConfigurationSessionResponse' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'initialConfigurationToken', 'startConfigurationSessionResponse_initialConfigurationToken' - Token encapsulating state about the configuration session. Provide this
+-- token to the @GetLatestConfiguration@ API to retrieve configuration
+-- data.
+--
+-- This token should only be used once in your first call to
+-- @GetLatestConfiguration@. You MUST use the new token in the
+-- @GetLatestConfiguration@ response (@NextPollConfigurationToken@) in each
+-- subsequent call to @GetLatestConfiguration@.
+--
+-- 'httpStatus', 'startConfigurationSessionResponse_httpStatus' - The response's http status code.
+newStartConfigurationSessionResponse ::
+  -- | 'httpStatus'
+  Prelude.Int ->
+  StartConfigurationSessionResponse
+newStartConfigurationSessionResponse pHttpStatus_ =
+  StartConfigurationSessionResponse'
+    { initialConfigurationToken =
+        Prelude.Nothing,
+      httpStatus = pHttpStatus_
+    }
+
+-- | Token encapsulating state about the configuration session. Provide this
+-- token to the @GetLatestConfiguration@ API to retrieve configuration
+-- data.
+--
+-- This token should only be used once in your first call to
+-- @GetLatestConfiguration@. You MUST use the new token in the
+-- @GetLatestConfiguration@ response (@NextPollConfigurationToken@) in each
+-- subsequent call to @GetLatestConfiguration@.
+startConfigurationSessionResponse_initialConfigurationToken :: Lens.Lens' StartConfigurationSessionResponse (Prelude.Maybe Prelude.Text)
+startConfigurationSessionResponse_initialConfigurationToken = Lens.lens (\StartConfigurationSessionResponse' {initialConfigurationToken} -> initialConfigurationToken) (\s@StartConfigurationSessionResponse' {} a -> s {initialConfigurationToken = a} :: StartConfigurationSessionResponse)
+
+-- | The response's http status code.
+startConfigurationSessionResponse_httpStatus :: Lens.Lens' StartConfigurationSessionResponse Prelude.Int
+startConfigurationSessionResponse_httpStatus = Lens.lens (\StartConfigurationSessionResponse' {httpStatus} -> httpStatus) (\s@StartConfigurationSessionResponse' {} a -> s {httpStatus = a} :: StartConfigurationSessionResponse)
+
+instance
+  Prelude.NFData
+    StartConfigurationSessionResponse
+  where
+  rnf StartConfigurationSessionResponse' {..} =
+    Prelude.rnf initialConfigurationToken
+      `Prelude.seq` Prelude.rnf httpStatus
diff --git a/gen/Amazonka/AppConfigData/Types.hs b/gen/Amazonka/AppConfigData/Types.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/AppConfigData/Types.hs
@@ -0,0 +1,133 @@
+{-# LANGUAGE DisambiguateRecordFields #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.AppConfigData.Types
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.AppConfigData.Types
+  ( -- * Service Configuration
+    defaultService,
+
+    -- * Errors
+    _BadRequestException,
+    _InternalServerException,
+    _ResourceNotFoundException,
+    _ThrottlingException,
+  )
+where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Prelude as Prelude
+import qualified Amazonka.Sign.V4 as Sign
+
+-- | API version @2021-11-11@ of the Amazon AppConfig Data SDK configuration.
+defaultService :: Core.Service
+defaultService =
+  Core.Service
+    { Core.abbrev = "AppConfigData",
+      Core.signer = Sign.v4,
+      Core.endpointPrefix = "appconfigdata",
+      Core.signingName = "appconfig",
+      Core.version = "2021-11-11",
+      Core.s3AddressingStyle = Core.S3AddressingStyleAuto,
+      Core.endpoint = Core.defaultEndpoint defaultService,
+      Core.timeout = Prelude.Just 70,
+      Core.check = Core.statusSuccess,
+      Core.error = Core.parseJSONError "AppConfigData",
+      Core.retry = retry
+    }
+  where
+    retry =
+      Core.Exponential
+        { Core.base = 5.0e-2,
+          Core.growth = 2,
+          Core.attempts = 5,
+          Core.check = check
+        }
+    check e
+      | Lens.has (Core.hasStatus 502) e =
+          Prelude.Just "bad_gateway"
+      | Lens.has (Core.hasStatus 504) e =
+          Prelude.Just "gateway_timeout"
+      | Lens.has (Core.hasStatus 500) e =
+          Prelude.Just "general_server_error"
+      | Lens.has (Core.hasStatus 509) e =
+          Prelude.Just "limit_exceeded"
+      | Lens.has
+          ( Core.hasCode "RequestThrottledException"
+              Prelude.. Core.hasStatus 400
+          )
+          e =
+          Prelude.Just "request_throttled_exception"
+      | Lens.has (Core.hasStatus 503) e =
+          Prelude.Just "service_unavailable"
+      | Lens.has
+          ( Core.hasCode "ThrottledException"
+              Prelude.. Core.hasStatus 400
+          )
+          e =
+          Prelude.Just "throttled_exception"
+      | Lens.has
+          ( Core.hasCode "Throttling"
+              Prelude.. Core.hasStatus 400
+          )
+          e =
+          Prelude.Just "throttling"
+      | Lens.has
+          ( Core.hasCode "ThrottlingException"
+              Prelude.. Core.hasStatus 400
+          )
+          e =
+          Prelude.Just "throttling_exception"
+      | Lens.has
+          ( Core.hasCode
+              "ProvisionedThroughputExceededException"
+              Prelude.. Core.hasStatus 400
+          )
+          e =
+          Prelude.Just "throughput_exceeded"
+      | Lens.has (Core.hasStatus 429) e =
+          Prelude.Just "too_many_requests"
+      | Prelude.otherwise = Prelude.Nothing
+
+-- | The input fails to satisfy the constraints specified by the service.
+_BadRequestException :: (Core.AsError a) => Lens.Fold a Core.ServiceError
+_BadRequestException =
+  Core._MatchServiceError
+    defaultService
+    "BadRequestException"
+    Prelude.. Core.hasStatus 400
+
+-- | There was an internal failure in the service.
+_InternalServerException :: (Core.AsError a) => Lens.Fold a Core.ServiceError
+_InternalServerException =
+  Core._MatchServiceError
+    defaultService
+    "InternalServerException"
+    Prelude.. Core.hasStatus 500
+
+-- | The requested resource could not be found.
+_ResourceNotFoundException :: (Core.AsError a) => Lens.Fold a Core.ServiceError
+_ResourceNotFoundException =
+  Core._MatchServiceError
+    defaultService
+    "ResourceNotFoundException"
+    Prelude.. Core.hasStatus 404
+
+-- | The request was denied due to request throttling.
+_ThrottlingException :: (Core.AsError a) => Lens.Fold a Core.ServiceError
+_ThrottlingException =
+  Core._MatchServiceError
+    defaultService
+    "ThrottlingException"
+    Prelude.. Core.hasStatus 429
diff --git a/gen/Amazonka/AppConfigData/Waiters.hs b/gen/Amazonka/AppConfigData/Waiters.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/AppConfigData/Waiters.hs
@@ -0,0 +1,24 @@
+{-# LANGUAGE DisambiguateRecordFields #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.AppConfigData.Waiters
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.AppConfigData.Waiters where
+
+import Amazonka.AppConfigData.Lens
+import Amazonka.AppConfigData.Types
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
diff --git a/src/.gitkeep b/src/.gitkeep
new file mode 100644
--- /dev/null
+++ b/src/.gitkeep
diff --git a/test/Main.hs b/test/Main.hs
new file mode 100644
--- /dev/null
+++ b/test/Main.hs
@@ -0,0 +1,23 @@
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+
+-- |
+-- Module      : Main
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Main (main) where
+
+import Test.Amazonka.AppConfigData
+import Test.Amazonka.AppConfigData.Internal
+import Test.Tasty
+
+main :: IO ()
+main =
+  defaultMain $
+    testGroup
+      "AppConfigData"
+      [ testGroup "tests" tests,
+        testGroup "fixtures" fixtures
+      ]
diff --git a/test/Test/Amazonka/AppConfigData.hs b/test/Test/Amazonka/AppConfigData.hs
new file mode 100644
--- /dev/null
+++ b/test/Test/Amazonka/AppConfigData.hs
@@ -0,0 +1,20 @@
+-- |
+-- Module      : Test.Amazonka.AppConfigData
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Test.Amazonka.AppConfigData
+  ( tests,
+    fixtures,
+  )
+where
+
+import Test.Tasty (TestTree)
+
+tests :: [TestTree]
+tests = []
+
+fixtures :: [TestTree]
+fixtures = []
diff --git a/test/Test/Amazonka/AppConfigData/Internal.hs b/test/Test/Amazonka/AppConfigData/Internal.hs
new file mode 100644
--- /dev/null
+++ b/test/Test/Amazonka/AppConfigData/Internal.hs
@@ -0,0 +1,8 @@
+-- |
+-- Module      : Test.Amazonka.AppConfigData.Internal
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Test.Amazonka.AppConfigData.Internal where
diff --git a/test/Test/Amazonka/Gen/AppConfigData.hs b/test/Test/Amazonka/Gen/AppConfigData.hs
new file mode 100644
--- /dev/null
+++ b/test/Test/Amazonka/Gen/AppConfigData.hs
@@ -0,0 +1,78 @@
+{-# OPTIONS_GHC -fno-warn-orphans #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Test.Amazonka.Gen.AppConfigData
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Test.Amazonka.Gen.AppConfigData where
+
+import Amazonka.AppConfigData
+import qualified Data.Proxy as Proxy
+import Test.Amazonka.AppConfigData.Internal
+import Test.Amazonka.Fixture
+import Test.Amazonka.Prelude
+import Test.Tasty
+
+-- Auto-generated: the actual test selection needs to be manually placed into
+-- the top-level so that real test data can be incrementally added.
+--
+-- This commented snippet is what the entire set should look like:
+
+-- fixtures :: TestTree
+-- fixtures =
+--     [ testGroup "request"
+--         [ requestGetLatestConfiguration $
+--             newGetLatestConfiguration
+--
+--         , requestStartConfigurationSession $
+--             newStartConfigurationSession
+--
+--           ]
+
+--     , testGroup "response"
+--         [ responseGetLatestConfiguration $
+--             newGetLatestConfigurationResponse
+--
+--         , responseStartConfigurationSession $
+--             newStartConfigurationSessionResponse
+--
+--           ]
+--     ]
+
+-- Requests
+
+requestGetLatestConfiguration :: GetLatestConfiguration -> TestTree
+requestGetLatestConfiguration =
+  req
+    "GetLatestConfiguration"
+    "fixture/GetLatestConfiguration.yaml"
+
+requestStartConfigurationSession :: StartConfigurationSession -> TestTree
+requestStartConfigurationSession =
+  req
+    "StartConfigurationSession"
+    "fixture/StartConfigurationSession.yaml"
+
+-- Responses
+
+responseGetLatestConfiguration :: GetLatestConfigurationResponse -> TestTree
+responseGetLatestConfiguration =
+  res
+    "GetLatestConfigurationResponse"
+    "fixture/GetLatestConfigurationResponse.proto"
+    defaultService
+    (Proxy.Proxy :: Proxy.Proxy GetLatestConfiguration)
+
+responseStartConfigurationSession :: StartConfigurationSessionResponse -> TestTree
+responseStartConfigurationSession =
+  res
+    "StartConfigurationSessionResponse"
+    "fixture/StartConfigurationSessionResponse.proto"
+    defaultService
+    (Proxy.Proxy :: Proxy.Proxy StartConfigurationSession)
