diff --git a/.github/dependabot.yaml b/.github/dependabot.yaml
new file mode 100644
index 0000000..0fec246
--- /dev/null
+++ b/.github/dependabot.yaml
@@ -0,0 +1,12 @@
+{
+  "updates": [
+    {
+      "directory": "/",
+      "package-ecosystem": "github-actions",
+      "schedule": {
+        "interval": "weekly"
+      }
+    }
+  ],
+  "version": 2
+}
diff --git a/.github/workflows/workflow.yaml b/.github/workflows/workflow.yaml
new file mode 100644
index 0000000..b49432a
--- /dev/null
+++ b/.github/workflows/workflow.yaml
@@ -0,0 +1,219 @@
+{
+  "jobs": {
+    "build": {
+      "name": "Build on ${{ matrix.platform }} ${{ matrix.version }} with GHC ${{ matrix.ghc }}",
+      "runs-on": "${{ matrix.platform }}-${{ matrix.version }}",
+      "steps": [
+        {
+          "uses": "actions/checkout@v4"
+        },
+        {
+          "run": "mkdir artifact"
+        },
+        {
+          "id": "haskell",
+          "uses": "haskell-actions/setup@v2",
+          "with": {
+            "ghc-version": "${{ matrix.ghc }}"
+          }
+        },
+        {
+          "run": "cabal sdist --output-dir artifact"
+        },
+        {
+          "run": "cabal configure --enable-optimization=2 --enable-tests --flags=pedantic --jobs"
+        },
+        {
+          "run": "cat cabal.project.local"
+        },
+        {
+          "run": "cp cabal.project.local artifact"
+        },
+        {
+          "run": "cabal freeze"
+        },
+        {
+          "run": "cat cabal.project.freeze"
+        },
+        {
+          "run": "cp cabal.project.freeze artifact"
+        },
+        {
+          "run": "cabal outdated --v2-freeze-file cabal.project.freeze"
+        },
+        {
+          "uses": "actions/cache@v4",
+          "with": {
+            "key": "${{ matrix.platform }}-${{ matrix.version }}-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}",
+            "path": "${{ steps.haskell.outputs.cabal-store }}",
+            "restore-keys": "${{ matrix.platform }}-${{ matrix.version }}-${{ matrix.ghc }}-"
+          }
+        },
+        {
+          "run": "cabal build --only-download"
+        },
+        {
+          "run": "cabal build --only-dependencies"
+        },
+        {
+          "run": "cabal build"
+        },
+        {
+          "run": "tar --create --file artifact.tar --verbose artifact"
+        },
+        {
+          "uses": "actions/upload-artifact@v4",
+          "with": {
+            "name": "imp-${{ github.sha }}-${{ matrix.platform }}-${{ matrix.version }}-${{ matrix.ghc }}",
+            "path": "artifact.tar"
+          }
+        }
+      ],
+      "strategy": {
+        "matrix": {
+          "include": [
+            {
+              "ghc": "9.8",
+              "platform": "macos",
+              "version": 13
+            },
+            {
+              "ghc": "9.8",
+              "platform": "macos",
+              "version": 14
+            },
+            {
+              "ghc": "9.4",
+              "platform": "ubuntu",
+              "version": 22.04
+            },
+            {
+              "ghc": "9.6",
+              "platform": "ubuntu",
+              "version": 22.04
+            },
+            {
+              "ghc": "9.8",
+              "platform": "ubuntu",
+              "version": 22.04
+            },
+            {
+              "ghc": "9.8",
+              "platform": "windows",
+              "version": 2022
+            }
+          ]
+        }
+      }
+    },
+    "cabal": {
+      "name": "Cabal",
+      "runs-on": "ubuntu-22.04",
+      "steps": [
+        {
+          "uses": "actions/checkout@v4"
+        },
+        {
+          "run": "cabal check"
+        }
+      ]
+    },
+    "gild": {
+      "name": "Gild",
+      "runs-on": "ubuntu-22.04",
+      "steps": [
+        {
+          "uses": "actions/checkout@v4"
+        },
+        {
+          "uses": "tfausak/cabal-gild-setup-action@v2",
+          "with": {
+            "version": "1.3.0.0"
+          }
+        },
+        {
+          "run": "cabal-gild --input imp.cabal --mode check"
+        }
+      ]
+    },
+    "hlint": {
+      "name": "HLint",
+      "runs-on": "ubuntu-22.04",
+      "steps": [
+        {
+          "uses": "actions/checkout@v4"
+        },
+        {
+          "uses": "haskell-actions/hlint-setup@v2",
+          "with": {
+            "version": 3.8
+          }
+        },
+        {
+          "uses": "haskell-actions/hlint-run@v2",
+          "with": {
+            "fail-on": "status"
+          }
+        }
+      ]
+    },
+    "ormolu": {
+      "name": "Ormolu",
+      "runs-on": "ubuntu-22.04",
+      "steps": [
+        {
+          "uses": "actions/checkout@v4"
+        },
+        {
+          "uses": "haskell-actions/run-ormolu@v15",
+          "with": {
+            "version": "0.7.4.0"
+          }
+        }
+      ]
+    },
+    "release": {
+      "env": {
+        "PREFIX": "imp-${{ github.event.release.tag_name }}"
+      },
+      "if": "${{ github.event_name == 'release' }}",
+      "name": "Release",
+      "needs": "build",
+      "runs-on": "ubuntu-22.04",
+      "steps": [
+        {
+          "uses": "actions/download-artifact@v4"
+        },
+        {
+          "run": "sh -exc 'for d in *; do cd $d; tar --extract --file artifact.tar --verbose; cd ..; done'"
+        },
+        {
+          "run": "cp imp-${{ github.sha }}-ubuntu-22.04-9.8/artifact/${{ env.PREFIX }}.tar.gz ."
+        },
+        {
+          "uses": "softprops/action-gh-release@v1",
+          "with": {
+            "files": "${{ env.PREFIX }}*.tar.gz"
+          }
+        },
+        {
+          "run": "cabal upload --publish --username '${{ secrets.HACKAGE_USERNAME }}' --password '${{ secrets.HACKAGE_PASSWORD }}' ${{ env.PREFIX }}.tar.gz"
+        }
+      ]
+    }
+  },
+  "name": "Workflow",
+  "on": {
+    "push": null,
+    "release": {
+      "types": [
+        "created"
+      ]
+    },
+    "schedule": [
+      {
+        "cron": "0 0 * * 1"
+      }
+    ]
+  }
+}