diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,12 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to the [Haskell Package Versioning Policy](https://pvp.haskell.org/).
+
+## [1.0.0] - 2026-07-10
+
+### Added
+
+- Initial release.
diff --git a/LICENCE b/LICENCE
new file mode 100644
--- /dev/null
+++ b/LICENCE
@@ -0,0 +1,287 @@
+                      EUROPEAN UNION PUBLIC LICENCE v. 1.2
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+
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+Appendix
+
+‘Compatible Licences’ according to Article 5 EUPL are:
+
+- GNU General Public License (GPL) v. 2, v. 3
+- GNU Affero General Public License (AGPL) v. 3
+- Open Software License (OSL) v. 2.1, v. 3.0
+- Eclipse Public License (EPL) v. 1.0
+- CeCILL v. 2.0, v. 2.1
+- Mozilla Public Licence (MPL) v. 2
+- GNU Lesser General Public Licence (LGPL) v. 2.1, v. 3
+- Creative Commons Attribution-ShareAlike v. 3.0 Unported (CC BY-SA 3.0) for
+  works other than software
+- European Union Public Licence (EUPL) v. 1.1, v. 1.2
+- Québec Free and Open-Source Licence — Reciprocity (LiLiQ-R) or Strong
+  Reciprocity (LiLiQ-R+).
+
+The European Commission may update this Appendix to later versions of the above
+licences without producing a new version of the EUPL, as long as they provide
+the rights granted in Article 2 of this Licence and protect the covered Source
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+All other changes or additions to this Appendix require the production of a new
+EUPL version.
diff --git a/Main.hs b/Main.hs
new file mode 100644
--- /dev/null
+++ b/Main.hs
@@ -0,0 +1,72 @@
+{-# LANGUAGE Trustworthy #-}
+
+module Main (main) where
+
+import Data.Functor ((<&>))
+import Data.List (intercalate, isPrefixOf, isSuffixOf, sort, stripPrefix)
+import Data.Maybe (fromMaybe, listToMaybe, mapMaybe)
+import System.Directory (doesDirectoryExist, listDirectory)
+import System.Environment (getArgs)
+import System.FilePath (dropExtension, makeRelative, splitDirectories, takeDirectory, (</>))
+
+main :: IO ()
+main =
+    getArgs >>= \case
+        src : _cur : dst : opts -> do
+            let srcDir = takeDirectory src
+            modules <- discoverSpecs srcDir srcDir
+            writeFile dst . generateModule (moduleNameFrom opts) $ sort modules
+        _ -> error "Usage: hspec-effectful-discover SRC CUR DST [--module-name=NAME]"
+
+moduleNameFrom :: [String] -> String
+moduleNameFrom = fromMaybe "Main" . listToMaybe . mapMaybe (stripPrefix "--module-name=")
+
+discoverSpecs :: FilePath -> FilePath -> IO [String]
+discoverSpecs baseDir dir =
+    fmap concat . traverse (processEntry baseDir dir) =<< listDirectory dir
+
+processEntry :: FilePath -> FilePath -> FilePath -> IO [String]
+processEntry baseDir dir entry
+    | "Spec.hs" `isSuffixOf` entry, entry /= "Spec.hs" = pure [pathToModule baseDir full]
+    | "." `isPrefixOf` entry = pure []
+    | otherwise = do
+        isDir <- doesDirectoryExist full
+        if isDir then discoverSpecs baseDir full else pure []
+  where
+    full = dir </> entry
+
+pathToModule :: FilePath -> FilePath -> String
+pathToModule baseDir =
+    intercalate "." . splitDirectories . dropExtension . makeRelative baseDir
+
+generateModule :: String -> [String] -> String
+generateModule moduleName modules =
+    unlines . mconcat $
+        [
+            [ "{-# OPTIONS_GHC -Wno-missing-local-signatures #-}"
+            , "{-# OPTIONS_GHC -Wno-missing-export-lists #-}"
+            , "{-# OPTIONS_GHC -Wno-missing-import-lists #-}"
+            , ""
+            , "module " <> moduleName <> " where"
+            , ""
+            , "import Effectful"
+            , "import Effectful.Hspec"
+            , "import Prelude"
+            , ""
+            ]
+        , modules <&> \m -> "import " <> m <> " qualified"
+        ,
+            [ ""
+            , "main :: IO ()"
+            , "main = runEff . runHspec $ do"
+            ]
+        , modules <&> \m -> "    describe " <> show (describeLabel m) <> " " <> m <> ".spec"
+        ]
+
+describeLabel :: String -> String
+describeLabel = stripSuffix "Spec" . reverse . takeWhile (/= '.') . reverse
+
+stripSuffix :: String -> String -> String
+stripSuffix suffix str
+    | suffix `isSuffixOf` str = take (length str - length suffix) str
+    | otherwise = str
diff --git a/Setup.hs b/Setup.hs
new file mode 100644
--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/hspec-effectful-discover.cabal b/hspec-effectful-discover.cabal
new file mode 100644
--- /dev/null
+++ b/hspec-effectful-discover.cabal
@@ -0,0 +1,99 @@
+cabal-version: 3.0
+name: hspec-effectful-discover
+version: 1.0.0
+category: Test
+synopsis: Automatic spec discovery for hspec-effectful
+description:
+  @hspec-effectful-discover@ is a GHC preprocessor that finds every
+  @*Spec.hs@ module beside your test driver and generates a @main@ that runs
+  them all using @<https://hackage.haskell.org/package/hspec-effectful Effectful.Hspec>@.
+  It is the @<https://hackage.haskell.org/package/effectful effectful>@
+  counterpart to @<https://hackage.haskell.org/package/hspec-discover hspec-discover>@.
+
+  = How to run your specs automatically
+
+  This guide walks you through wiring up automatic spec discovery for a test
+  suite. Once it is in place, creating a new @*Spec.hs@ file next to your test
+  driver is all it takes to have its tests picked up and run.
+
+  == Step 1: turn your test driver into a preprocessor stub
+
+  Your test suite's entry point, e.g. @test\/Main.hs@, should only contain the preprocessor pragma:
+
+  @
+  {-\# OPTIONS_GHC -F -pgmF hspec-effectful-discover \#-}
+  @
+
+  Before compiling this module, GHC hands it to @hspec-effectful-discover@, which replaces it with
+  a generated module that imports and runs every spec it finds.
+
+  == Step 2: make @hspec-effectful-discover@ available to your build
+
+  Declare the executable as a build tool of your test suite so that GHC can
+  locate it. In your @.cabal@ file:
+
+  @
+  test-suite spec
+    type: exitcode-stdio-1.0
+    hs-source-dirs: test
+    main-is: Main.hs
+    build-tool-depends: hspec-effectful-discover:hspec-effectful-discover
+    build-depends: base, effectful, hspec-effectful
+  @
+
+  == Step 3: write your specs
+
+  Put each spec in a module whose file name ends in @Spec.hs@ (for example
+  @test\/Account\/BalanceSpec.hs@) and expose a top-level @spec@ action:
+
+  @
+  module Account.BalanceSpec (spec) where
+
+  import Effectful
+  import Effectful.Hspec
+
+  spec :: (Hspec :> es) => Eff es ()
+  spec = it "starts empty" $ pure () \`shouldReturn\` ()
+  @
+
+  In addition to the 'Hspec' effect you also have access to 'IOE', allowing you to
+  run arbitrary other effects:
+
+  @
+  spec :: (IOE :> es, Hspec :> es) => Eff es ()
+  spec = runFailIO . it "can fail" $ do
+        Just () <- pure Nothing
+        pure ()
+  @
+
+  @hspec-effectful-discover@ derives the module name from the file's path relative to
+  the driver, so @Account\/BalanceSpec.hs@ becomes @Account.BalanceSpec@ and is
+  grouped under a @describe \"Balance\"@ block (the trailing @Spec@ is dropped).
+  Files named exactly @Spec.hs@ and hidden directories are ignored.
+
+  == Step 4: run the suite
+
+  Build and run as usual, for instance with @cabal test@.
+
+license: EUPL-1.2
+license-file: LICENCE
+author: IDA
+maintainer: IDA
+homepage: https://digital-autonomy.institute
+bug-reports: https://issues.digital-autonomy.institute
+build-type: Simple
+extra-doc-files:
+  CHANGELOG.md
+
+executable hspec-effectful-discover
+  default-language: Haskell2010
+  default-extensions:
+    BlockArguments
+    LambdaCase
+
+  hs-source-dirs: .
+  main-is: Main.hs
+  build-depends:
+    base >=4.16 && <5,
+    directory >=1.3 && <1.4,
+    filepath >=1.5 && <1.6,
