diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 2d1a7bb..14d0611 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -5,7 +5,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.19.x, 1.20.x]
+        go-version: [1.19.x, 1.20.x, 1.21.x]
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
diff --git a/cmd/forecast/main.go b/cmd/forecast/main.go
new file mode 100644
index 0000000..c37f2d6
--- /dev/null
+++ b/cmd/forecast/main.go
@@ -0,0 +1,11 @@
+package main
+
+import (
+	"os"
+
+	"github.com/qba73/meteo"
+)
+
+func main() {
+	os.Exit(meteo.RunForecastCLI())
+}
diff --git a/cmd/meteo/meteo b/cmd/meteo/meteo
new file mode 100755
index 0000000..f2deeef
Binary files /dev/null and b/cmd/meteo/meteo differ
diff --git a/goci.yml b/goci.yml
new file mode 100644
index 0000000..eac551c
--- /dev/null
+++ b/goci.yml
@@ -0,0 +1,62 @@
+linters:
+  disable-all: true
+  enable:
+    - bodyclose
+    - deadcode
+    - dupl
+    - errcheck
+    - gochecknoglobals
+    - gochecknoinits
+    - goconst
+    - gocritic
+    - gocyclo
+    - gofmt
+    - goimports
+    - gosec
+    - gosimple
+    - govet
+    - lll
+    - ineffassign
+    - misspell
+    - nakedret
+    - prealloc
+    - exportloopref
+    - staticcheck
+    - structcheck
+    - stylecheck
+    - typecheck
+    - unconvert
+    - unparam
+    - unused
+    - varcheck
+    - dogsled
+    - godox
+    - whitespace
+    - godot
+    - revive
+
+linter-settings:
+  goimports:
+    local-prefixes: github.com/qba73/meteo
+
+  errcheck:
+    check-type-assertions: true
+    check-blank: true
+
+  unused:
+    check-exported: true
+
+  unparam:
+    check-exported: true
+
+  prealloc:
+    for-loops: true
+
+  gocritic:
+    enabled-tags:
+      - diagnostic
+      - style
+      - performance
+      - experimental
+      - opinionated
+
diff --git a/meteo b/meteo
new file mode 100755
index 0000000..c80d4bd
Binary files /dev/null and b/meteo differ
diff --git a/testdata/script/meteo.txtar b/testdata/script/meteo.txtar
new file mode 100644
index 0000000..e69de29