diff --git a/haskell/app/Main.hs b/haskell/app/Main.hs
index c5e9798..5351d07 100644
--- a/haskell/app/Main.hs
+++ b/haskell/app/Main.hs
@@ -2,6 +2,9 @@
 
 module Main where
 
+
+import P2Prc
+
 import System.Exit
   ( ExitCode(ExitFailure)
   )
@@ -42,7 +45,7 @@ import Data.Aeson
 -- TODO: setup the project as a haskell library
 -- TODO: splitting code on different files and directories
 -- TODO: lock cabal index
--- TODO: setup nix flake package
+-- TODO: add Haddock documentation
 --
 -- TODO: P2PRC setup
   -- p2prc runtime packaging
@@ -54,11 +57,11 @@ import Data.Aeson
     -- check if p2prc command is available in environment first
     -- otherwise check folder above
 --
--- TODO: add Haddock documentation
---
--- TODO: add quickcheck testing (quickchecking-dynamic)
---
 -- TODO: publish haskell library
+--
+-- TODO: add use case examples (extra-source_files)
+
+
 
 
 main :: IO ()
@@ -74,6 +77,9 @@ main = do
   -- TODO: parse IO arguments;
     -- TODO: create DSL from the standard input
   --
+  -- TODO: setup nix flake package
+  -- TODO: add quickcheck testing (quickchecking-dynamic)
+
 
 
   eitherP2prcAPI <- getP2prcAPI
@@ -132,6 +138,8 @@ main = do
 
           terminateProcess startProcessHandle
 
+          print siuu
+
         (Left err) -> print err
 
     (Left err) -> print err
diff --git a/haskell/lib/P2Prc.hs b/haskell/lib/P2Prc.hs
new file mode 100644
index 0000000..0ad2d20
--- /dev/null
+++ b/haskell/lib/P2Prc.hs
@@ -0,0 +1,6 @@
+module P2Prc where
+
+
+siuu :: String
+siuu = "SIUUU"
+
diff --git a/haskell/p2prc-haskell.cabal b/haskell/p2prc.cabal
similarity index 82%
rename from haskell/p2prc-haskell.cabal
rename to haskell/p2prc.cabal
index baec90d..6e5c319 100644
--- a/haskell/p2prc-haskell.cabal
+++ b/haskell/p2prc.cabal
@@ -7,12 +7,12 @@ cabal-version:      3.0
 -- Starting from the specification version 2.2, the cabal-version field must be
 -- the first thing in the cabal file.
 
--- Initial package description 'p2prc-haskell' generated by
+-- Initial package description 'p2prc' generated by
 -- 'cabal init'. For further documentation, see:
 --   http://haskell.org/cabal/users-guide/
 --
 -- The name of the package.
-name:               p2prc-haskell
+name:         p2prc
 
 -- The package version.
 -- See the Haskell package versioning policy (PVP) for standards
@@ -55,7 +55,7 @@ extra-doc-files:    CHANGELOG.md
 common warnings
     ghc-options: -Wall
 
-executable p2prc-haskell
+executable p2prc
     -- Import common warning flags.
     import:           warnings
 
@@ -63,21 +63,41 @@ executable p2prc-haskell
     main-is:          Main.hs
 
     -- Modules included in this executable, other than Main.
-    -- other-modules:
+    -- other-modules:    Example
 
     -- LANGUAGE extensions used by modules in this package.
     other-extensions: OverloadedStrings
 
     -- Other library packages from which modules are imported.
-    build-depends:    base
+    build-depends:      base
                       , text
                       , aeson
                       , process
                       , bytestring
                       , directory
+                      , p2prc
 
     -- Directories containing source files.
     hs-source-dirs:   app
 
     -- Base language which the package is written in.
     default-language: GHC2021
+
+library
+
+    import:           warnings
+
+    build-depends:      base
+                      , text
+                      , aeson
+                      , process
+                      , bytestring
+                      , directory
+
+    hs-source-dirs:   lib
+
+    exposed-modules:  P2Prc
+
+    other-extensions: OverloadedStrings
+
+    default-language: GHC2021