diff --git a/.gaplint.yml b/.gaplint.yml
new file mode 100644
index 0000000..892afe1
--- /dev/null
+++ b/.gaplint.yml
@@ -0,0 +1,3 @@
+disable:
+  - align-assignments
+duplicate-function-min-length: 4
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
new file mode 100644
index 0000000..fc3efd6
--- /dev/null
+++ b/.github/workflows/lint.yml
@@ -0,0 +1,27 @@
+name: "Lint"
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches:
+      - main
+      - stable-*.*
+  schedule:
+    # Every day at 3:30 AM UTC
+    - cron: '30 3 * * *'
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+    - name: "Check out the repository"
+      uses: actions/checkout@v4
+    - name: "Set up Python"
+      uses: actions/setup-python@v5
+    - name: "Install gaplint with pip"
+      run: pip install gaplint
+    - name: "Run gaplint on the graphviz package"
+      run: |
+      gaplint gap/*.g* tst/*.tst examples/*.g* PackageInfo.g init.g read.g makedoc.g tst/testall.g
diff --git a/PackageInfo.g b/PackageInfo.g
index c482ace..74e51c1 100644
--- a/PackageInfo.g
+++ b/PackageInfo.g
@@ -1,54 +1,48 @@
 #
-# graphviz: This package facilitates the creation of graph descriptions in the DOT language of the Graphviz graph drawing software from GAP
+# graphviz: This package facilitates the creation of graph descriptions in the
+# DOT language of the Graphviz graph drawing software from GAP
 #
 # This file contains package meta data. For additional information on
 # the meaning and correct usage of these fields, please consult the
 # manual of the "Example" package as well as the comments in its
 # PackageInfo.g file.
 #
-SetPackageInfo( rec(
+SetPackageInfo(rec(
 
 PackageName := "graphviz",
-Subtitle := "This package facilitates the creation of graph descriptions in the DOT language of the Graphviz graph drawing software from GAP",
-Version := "0.1",
-Date := "09/04/2022", # dd/mm/yyyy format
-License := "GPL-2.0-or-later",
+Subtitle    := "GAP representations of graphviz objects",
+Version     := "0.0.0",
+Date        := "09/04/2022",  # dd/mm/yyyy format
+License     := "GPL-2.0-or-later",
 
 Persons := [
   rec(
-    FirstNames := "James D.",
-    LastName := "Mitchell",
-    WWWHome := "https://jdbm.me",
-    Email := "jdm3@st-andrews.ac.uk",
-    IsAuthor := true,
-    IsMaintainer := true,
-    PostalAddress := "Mathematical Institute, North Haugh, St Andrews, Fife, KY16 9SS, Scotland",
-    Place := "St Andrews",
-    Institution := "University of St Andrews",
-  ),
-],
+    FirstNames    := "James D.",
+    LastName      := "Mitchell",
+    WWWHome       := "https://jdbm.me",
+    Email         := "jdm3@st-andrews.ac.uk",
+    IsAuthor      := true,
+    IsMaintainer  := true,
+    PostalAddress := Concatenation("Mathematical Institute, North Haugh,",
+                     " St Andrews, Fife, KY16 9SS, Scotland"),
+    Place       := "St Andrews",
+    Institution := "University of St Andrews")],
 
-#SourceRepository := rec( Type := "TODO", URL := "URL" ),
-#IssueTrackerURL := "TODO",
-PackageWWWHome := "https://google.com", # "None/",
-PackageInfoURL := "https://google.com", # Concatenation( ~.PackageWWWHome, "PackageInfo.g" ),
-README_URL     := "https://google.com", # Concatenation( ~.PackageWWWHome, "README.md" ),
-ArchiveURL     := "https://google.com", # Concatenation( ~.PackageWWWHome,
-                  #               "/", ~.PackageName, "-", ~.Version ),
+SourceRepository := rec(Type := "git",
+                        URL  := "https://github.com/digraphs/graphviz"),
+IssueTrackerURL := "https://github.com/digraphs/graphviz/issues",
+PackageWWWHome  := "TODO",
 
+PackageInfoURL := Concatenation(~.PackageWWWHome, "PackageInfo.g"),
+README_URL     := Concatenation(~.PackageWWWHome, "README.md"),
+ArchiveURL     := Concatenation(~.PackageWWWHome,
+                                "/",
+                                ~.PackageName,
+                                "-",
+                                ~.Version),
 ArchiveFormats := ".tar.gz",
 
-##  Status information. Currently the following cases are recognized:
-##    "accepted"      for successfully refereed packages
-##    "submitted"     for packages submitted for the refereeing
-##    "deposited"     for packages for which the GAP developers agreed
-##                    to distribute them with the core GAP system
-##    "dev"           for development versions of packages
-##    "other"         for all other packages
-##
-Status := "dev",
-
-AbstractHTML   :=  "",
+AbstractHTML := "TODO",
 
 PackageDoc := rec(
   BookName  := "graphviz",
@@ -56,22 +50,16 @@ PackageDoc := rec(
   HTMLStart := "doc/chap0.html",
   PDFFile   := "doc/manual.pdf",
   SixFile   := "doc/manual.six",
-  LongTitle := "This package facilitates the creation of graph descriptions in the DOT language of the Graphviz graph drawing software from GAP",
+  LongTitle := "TODO",
 ),
 
 Dependencies := rec(
-  GAP := ">= 4.11",
-  NeededOtherPackages := [  ],
-  SuggestedOtherPackages := [ ],
-  ExternalConditions := [ ],
+  GAP := ">= 4.11.0",
+  NeededOtherPackages := [],
+  SuggestedOtherPackages := [],
+  ExternalConditions := [],
 ),
 
 AvailabilityTest := ReturnTrue,
 
-TestFile := "tst/testall.g",
-
-#Keywords := [ "TODO" ],
-
-));
-
-
+TestFile := "tst/testall.g"));
diff --git a/gap/dot.gi b/gap/dot.gi
index 8d66bd7..5e137af 100644
--- a/gap/dot.gi
+++ b/gap/dot.gi
@@ -183,12 +183,8 @@ DeclareOperation("GV_Digraph", [IsGVDigraph, IsString]);
 DeclareOperation("GV_Context", [IsGVGraph, IsString]);
 DeclareOperation("GV_Map", []);
 
-InstallMethod(GV_Map,
-"for a nothing",
-[],
-function()
-  return Objectify(GV_MapType, rec(Data := rec()));
-end);
+InstallMethod(GV_Map, "for no args",
+[], {} -> Objectify(GV_MapType, rec(Data := rec())));
 
 InstallMethod(GV_Node,
 "for a string",
@@ -350,19 +346,14 @@ end);
 InstallOtherMethod(IsBound\[\],
 "for a graphviz map and an object",
 [IsGV_Map, IsObject],
-function(m, key)
-  return IsBound(m!.Data.(key));
-end);
+{m, key} -> IsBound(m!.Data.(key)));
 
 DeclareOperation("GV_MapNames", [IsGV_Map]);
-InstallMethod(GV_MapNames,
-"for a graphviz map",
-[IsGV_Map],
-m -> RecNames(m!.Data));
 
-InstallMethod(ViewString,
-"for a graphviz map",
-[IsGV_Map],
+InstallMethod(GV_MapNames, "for a graphviz map",
+[IsGV_Map], m -> RecNames(m!.Data));
+
+InstallMethod(ViewString, "for a graphviz map", [IsGV_Map],
 m -> String(m!.Data));
 
 # ###########################################################
@@ -495,10 +486,10 @@ x -> x!.Counter);
 # Converting strings
 
 DeclareOperation("GV_EnsureString", [IsObject]);
+# TODO required?
 InstallMethod(GV_EnsureString,
 "for an object",
-[IsObject],
-x -> ViewString(x));
+[IsObject], ViewString);
 
 InstallMethod(GV_EnsureString,
 "for a string",
@@ -562,9 +553,7 @@ end);
 InstallOtherMethod(\[\],
 "for a graphviz graph and string",
 [IsGVGraph, IsString],
-function(graph, node)
-  return GraphvizNodes(graph)[node];
-end);
+{graph, node} -> GraphvizNodes(graph)[node]);
 
 InstallOtherMethod(\[\],
 "for a graphviz graph and string",
@@ -572,20 +561,17 @@ InstallOtherMethod(\[\],
 {g, o} -> g[ViewString(o)]);
 
 DeclareOperation("GV_HasNode", [IsGVGraph, IsObject]);
+
 InstallMethod(GV_HasNode,
 "for a graphviz graph",
 [IsGVGraph, IsString],
-function(g, name)
-  return name in GV_MapNames(GraphvizNodes(g));
-end);
+{g, name} -> name in GV_MapNames(GraphvizNodes(g)));
 
 DeclareOperation("GV_GetParent", [IsGVGraph]);
+
 InstallMethod(GV_GetParent,
 "for a graphviz graph",
-[IsGVGraph],
-function(graph)
-  return graph!.Parent;
-end);
+[IsGVGraph], graph -> graph!.Parent);
 
 DeclareOperation("GV_GraphTreeSearch", [IsGVGraph, IsFunction]);
 InstallMethod(GV_GraphTreeSearch,
@@ -772,9 +758,10 @@ function(x, name)
   return node;
 end);
 
+# TODO required?
 InstallMethod(GraphvizAddNode, "for a graphviz graph and string",
 [IsGVGraph, IsGVNode],
-function(_, __)
+function(_, __)  # gaplint: disable=analyse-lvars
   local error;
   error := "Cannot add node objects directly to graphs. ";
   error := Concatenation(error, "Please use the node's name.");
@@ -784,9 +771,7 @@ end);
 InstallMethod(GraphvizAddNode,
 "for a graphviz graph and string",
 [IsGVGraph, IsObject],
-function(x, name)
-  return GraphvizAddNode(x, ViewString(name));
-end);
+{x, name} -> GraphvizAddNode(x, ViewString(name)));
 
 DeclareOperation("GV_AddEdge", [IsGVGraph, IsGVEdge]);
 InstallMethod(GV_AddEdge,
@@ -949,9 +934,7 @@ InstallMethod(GraphvizAddContext,
 
 InstallMethod(GraphvizRemoveNode, "for a graphviz graph and node",
 [IsGVGraph, IsGVNode],
-function(g, node)
-  return GraphvizRemoveNode(g, GraphvizName(node));
-end);
+{g, node} -> GraphvizRemoveNode(g, GraphvizName(node)));
 
 InstallMethod(GraphvizRemoveNode, "for a graphviz graph and a string",
 [IsGVGraph, IsString],
@@ -1050,27 +1033,19 @@ end);
 
 # @ Return DOT graph head line.
 InstallMethod(GV_StringifyGraphHead, "for a string", [IsGVGraph],
-function(graph)
-  return StringFormatted("graph {} {{\n", GraphvizName(graph));
-end);
+graph -> StringFormatted("graph {} {{\n", GraphvizName(graph)));
 
 # @ Return DOT digraph head line.
 InstallMethod(GV_StringifyDigraphHead, "for a string", [IsGVDigraph],
-function(graph)
-  return StringFormatted("digraph {} {{\n", GraphvizName(graph));
-end);
+graph -> StringFormatted("digraph {} {{\n", GraphvizName(graph)));
 
 # @ Return DOT subgraph head line.
 InstallMethod(GV_StringifySubgraphHead, "for a string", [IsGVGraph],
-function(graph)
-  return StringFormatted("subgraph {} {{\n", GraphvizName(graph));
-end);
+graph -> StringFormatted("subgraph {} {{\n", GraphvizName(graph)));
 
 # @ Return DOT subgraph head line.
 InstallMethod(GV_StringifyContextHead, "for a string", [IsGVContext],
-function(graph)
-  return StringFormatted("// {} context \n", GraphvizName(graph));
-end);
+graph -> StringFormatted("// {} context \n", GraphvizName(graph)));
 
 # @ Return DOT node statement line.
 InstallMethod(GV_StringifyNode, "for string and record",
@@ -1226,7 +1201,7 @@ InstallMethod(GV_StringifyGraph,
 "for a graphviz graph and a string",
 [IsGVGraph, IsBool],
 function(graph, is_subgraph)
-  local result, obj, tmp;
+  local result, obj;
   result := "";
 
   # get the correct head to use
@@ -1281,6 +1256,4 @@ end);
 
 InstallMethod(AsString, "for a graphviz graph",
 [IsGVGraph],
-function(graph)
-  return GV_StringifyGraph(graph, false);
-end);
+graph -> GV_StringifyGraph(graph, false));
diff --git a/gap/splash.gi b/gap/splash.gi
index 30cd1de..517e017 100644
--- a/gap/splash.gi
+++ b/gap/splash.gi
@@ -5,7 +5,7 @@ if not IsBound(Splash) then  # This function is written by A. Egri-Nagy
 
   BindGlobal("Splash",
   function(arg)
-    local str, opt, path, dir, tdir, file, viewer, type, inn, filetype, out,
+    local str, opt, path, dir, tdir, file, viewer, inn, filetype, out,
           engine;
 
     if not IsString(arg[1]) and not IsGVGraph(arg[1]) then
diff --git a/start.g b/start.g
deleted file mode 100644
index 0d6d0cb..0000000
--- a/start.g
+++ /dev/null
@@ -1,3 +0,0 @@
-# Testing Utility File
-
-LoadPackage("graphviz");
\ No newline at end of file