diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
new file mode 100644
index 0000000..a582277
--- /dev/null
+++ b/.gitea/workflows/ci.yml
@@ -0,0 +1,56 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches: [ main ]
+
+jobs:
+  lint:
+    runs-on: codeberg-small
+    steps:
+      - name: Checkout code
+        uses: https://github.com/actions/checkout@v4
+
+      - name: Set up Go
+        uses: https://github.com/actions/setup-go@v5
+        with:
+          go-version: '1.21'
+          cache: true
+
+      - name: Install golangci-lint
+        run: |
+          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/HEAD/install.sh | sh -s -- -b $(go env GOPATH)/bin v2.6.2
+
+      - name: Run golangci-lint
+        run: golangci-lint run --timeout 5m
+
+  build:
+    runs-on: codeberg-small
+    steps:
+      - name: Checkout code
+        uses: https://github.com/actions/checkout@v4
+
+      - name: Set up Go
+        uses: https://github.com/actions/setup-go@v5
+        with:
+          go-version: '1.21'
+          cache: true
+
+      - name: Build application
+        run: make build
+
+  test:
+    runs-on: codeberg-small
+    steps:
+      - name: Checkout code
+        uses: https://github.com/actions/checkout@v4
+
+      - name: Set up Go
+        uses: https://github.com/actions/setup-go@v5
+        with:
+          go-version: '1.21'
+          cache: true
+
+      - name: Run tests
+        run: go test -v -race ./...
diff --git a/.golangci.yml b/.golangci.yml
new file mode 100644
index 0000000..bc67641
--- /dev/null
+++ b/.golangci.yml
@@ -0,0 +1,13 @@
+version: "2"
+
+run:
+  timeout: 5m
+  tests: true
+
+linters:
+  enable:
+    - errcheck
+    - govet
+    - ineffassign
+    - staticcheck
+    - unused
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..57e8eda
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,29 @@
+.PHONY: help build run test clean lint lint-fix
+
+help:
+	@echo "Available commands:"
+	@echo "  make build      - Build the application"
+	@echo "  make run        - Run the application"
+	@echo "  make test       - Run tests"
+	@echo "  make lint       - Run golangci-lint"
+	@echo "  make lint-fix   - Run golangci-lint with auto-fix"
+	@echo "  make clean      - Clean build artifacts"
+
+build:
+	go build -o bin/fgj .
+
+run:
+	go run .
+
+test:
+	go test -v -race ./...
+
+lint:
+	golangci-lint run ./...
+
+lint-fix:
+	golangci-lint run --fix ./...
+
+clean:
+	rm -rf bin/
+	go clean
diff --git a/cmd/issue.go b/cmd/issue.go
index 7cf33fd..1644143 100644
--- a/cmd/issue.go
+++ b/cmd/issue.go
@@ -124,13 +124,13 @@ func runIssueList(cmd *cobra.Command, args []string) error {
 	}
 
 	w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
-	fmt.Fprintf(w, "NUMBER\tTITLE\tSTATE\n")
+	_, _ = fmt.Fprintf(w, "NUMBER\tTITLE\tSTATE\n")
 	for _, issue := range issues {
 		if issue.PullRequest == nil {
-			fmt.Fprintf(w, "#%d\t%s\t%s\n", issue.Index, issue.Title, issue.State)
+			_, _ = fmt.Fprintf(w, "#%d\t%s\t%s\n", issue.Index, issue.Title, issue.State)
 		}
 	}
-	w.Flush()
+	_ = w.Flush()
 
 	return nil
 }
diff --git a/cmd/pr.go b/cmd/pr.go
index cb0071d..8091937 100644
--- a/cmd/pr.go
+++ b/cmd/pr.go
@@ -116,11 +116,11 @@ func runPRList(cmd *cobra.Command, args []string) error {
 	}
 
 	w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
-	fmt.Fprintf(w, "NUMBER\tTITLE\tBRANCH\tSTATE\n")
+	_, _ = fmt.Fprintf(w, "NUMBER\tTITLE\tBRANCH\tSTATE\n")
 	for _, pr := range prs {
-		fmt.Fprintf(w, "#%d\t%s\t%s\t%s\n", pr.Index, pr.Title, pr.Head.Ref, pr.State)
+		_, _ = fmt.Fprintf(w, "#%d\t%s\t%s\t%s\n", pr.Index, pr.Title, pr.Head.Ref, pr.State)
 	}
-	w.Flush()
+	_ = w.Flush()
 
 	return nil
 }
diff --git a/cmd/repo.go b/cmd/repo.go
index 2b9bcfc..814f3c2 100644
--- a/cmd/repo.go
+++ b/cmd/repo.go
@@ -127,7 +127,7 @@ func runRepoList(cmd *cobra.Command, args []string) error {
 	}
 
 	w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
-	fmt.Fprintf(w, "NAME\tVISIBILITY\tDESCRIPTION\n")
+	_, _ = fmt.Fprintf(w, "NAME\tVISIBILITY\tDESCRIPTION\n")
 	for _, repo := range repos {
 		visibility := "public"
 		if repo.Private {
@@ -137,9 +137,9 @@ func runRepoList(cmd *cobra.Command, args []string) error {
 		if len(desc) > 50 {
 			desc = desc[:47] + "..."
 		}
-		fmt.Fprintf(w, "%s/%s\t%s\t%s\n", repo.Owner.UserName, repo.Name, visibility, desc)
+		_, _ = fmt.Fprintf(w, "%s/%s\t%s\t%s\n", repo.Owner.UserName, repo.Name, visibility, desc)
 	}
-	w.Flush()
+	_ = w.Flush()
 
 	return nil
 }
diff --git a/cmd/root.go b/cmd/root.go
index f7b1581..34fef9c 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -27,7 +27,7 @@ func init() {
 
 	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.config/fgj/config.yaml)")
 	rootCmd.PersistentFlags().String("hostname", "", "Forgejo instance hostname")
-	viper.BindPFlag("hostname", rootCmd.PersistentFlags().Lookup("hostname"))
+	_ = viper.BindPFlag("hostname", rootCmd.PersistentFlags().Lookup("hostname"))
 }
 
 func initConfig() {
@@ -41,7 +41,7 @@ func initConfig() {
 		}
 
 		configDir := home + "/.config/fgj"
-		os.MkdirAll(configDir, 0755)
+		_ = os.MkdirAll(configDir, 0755)
 
 		viper.AddConfigPath(configDir)
 		viper.SetConfigType("yaml")
@@ -51,7 +51,5 @@ func initConfig() {
 	viper.AutomaticEnv()
 	viper.SetEnvPrefix("FGJ")
 
-	if err := viper.ReadInConfig(); err == nil {
-		// Config file found and successfully parsed
-	}
+	_ = viper.ReadInConfig()
 }
diff --git a/internal/api/client_test.go b/internal/api/client_test.go
new file mode 100644
index 0000000..951a25b
--- /dev/null
+++ b/internal/api/client_test.go
@@ -0,0 +1,28 @@
+package api
+
+import (
+	"testing"
+
+	"codeberg.org/romaintb/fgj/internal/config"
+)
+
+func TestClient_Hostname(t *testing.T) {
+	client := &Client{
+		hostname: "codeberg.org",
+	}
+
+	if client.Hostname() != "codeberg.org" {
+		t.Errorf("Expected hostname 'codeberg.org', got '%s'", client.Hostname())
+	}
+}
+
+func TestNewClientFromConfig_MissingHost(t *testing.T) {
+	cfg := &config.Config{
+		Hosts: map[string]config.HostConfig{},
+	}
+
+	_, err := NewClientFromConfig(cfg, "nonexistent.org")
+	if err == nil {
+		t.Error("Expected error for nonexistent host")
+	}
+}
diff --git a/internal/config/config.go b/internal/config/config.go
index 32f80ae..41c7409 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -41,7 +41,10 @@ func Load() (*Config, error) {
 	if err != nil {
 		return nil, err
 	}
+	return LoadFromPath(path)
+}
 
+func LoadFromPath(path string) (*Config, error) {
 	data, err := os.ReadFile(path)
 	if err != nil {
 		if os.IsNotExist(err) {
@@ -67,7 +70,10 @@ func (c *Config) Save() error {
 	if err != nil {
 		return err
 	}
+	return c.SaveToPath(path)
+}
 
+func (c *Config) SaveToPath(path string) error {
 	dir := filepath.Dir(path)
 	if err := os.MkdirAll(dir, 0755); err != nil {
 		return err
diff --git a/internal/config/config_test.go b/internal/config/config_test.go
new file mode 100644
index 0000000..90970b0
--- /dev/null
+++ b/internal/config/config_test.go
@@ -0,0 +1,229 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestConfig_SetHost(t *testing.T) {
+	cfg := &Config{}
+
+	hostConfig := HostConfig{
+		Hostname: "codeberg.org",
+		Token:    "test-token",
+		User:     "testuser",
+	}
+
+	cfg.SetHost("codeberg.org", hostConfig)
+
+	if cfg.Hosts == nil {
+		t.Fatal("Hosts map should not be nil")
+	}
+
+	if len(cfg.Hosts) != 1 {
+		t.Errorf("Expected 1 host, got %d", len(cfg.Hosts))
+	}
+
+	host, ok := cfg.Hosts["codeberg.org"]
+	if !ok {
+		t.Fatal("Host codeberg.org not found")
+	}
+
+	if host.Hostname != "codeberg.org" {
+		t.Errorf("Expected hostname 'codeberg.org', got '%s'", host.Hostname)
+	}
+
+	if host.Token != "test-token" {
+		t.Errorf("Expected token 'test-token', got '%s'", host.Token)
+	}
+}
+
+func TestConfig_GetHost(t *testing.T) {
+	cfg := &Config{
+		Hosts: map[string]HostConfig{
+			"codeberg.org": {
+				Hostname: "codeberg.org",
+				Token:    "test-token",
+			},
+		},
+	}
+
+	host, err := cfg.GetHost("codeberg.org")
+	if err != nil {
+		t.Fatalf("Unexpected error: %v", err)
+	}
+
+	if host.Hostname != "codeberg.org" {
+		t.Errorf("Expected hostname 'codeberg.org', got '%s'", host.Hostname)
+	}
+
+	_, err = cfg.GetHost("nonexistent.org")
+	if err == nil {
+		t.Error("Expected error for nonexistent host")
+	}
+}
+
+func TestGetConfigDir(t *testing.T) {
+	dir, err := GetConfigDir()
+	if err != nil {
+		t.Fatalf("Unexpected error: %v", err)
+	}
+
+	if dir == "" {
+		t.Error("Config directory should not be empty")
+	}
+}
+
+func TestGetConfigPath(t *testing.T) {
+	path, err := GetConfigPath()
+	if err != nil {
+		t.Fatalf("Unexpected error: %v", err)
+	}
+
+	if path == "" {
+		t.Error("Config path should not be empty")
+	}
+}
+
+func TestConfig_SaveAndLoad(t *testing.T) {
+	// Create a temp directory for testing
+	tempDir := t.TempDir()
+	tempFile := filepath.Join(tempDir, "config.yaml")
+
+	// Create a config with test data
+	cfg := &Config{
+		Hosts: map[string]HostConfig{
+			"codeberg.org": {
+				Hostname:    "codeberg.org",
+				Token:       "test-token-123",
+				User:        "testuser",
+				GitProtocol: "ssh",
+			},
+			"github.com": {
+				Hostname:    "github.com",
+				Token:       "github-token-456",
+				User:        "githubuser",
+				GitProtocol: "https",
+			},
+		},
+	}
+
+	// Test Save
+	err := cfg.SaveToPath(tempFile)
+	if err != nil {
+		t.Fatalf("Failed to save config: %v", err)
+	}
+
+	// Verify file exists
+	if _, err := os.Stat(tempFile); os.IsNotExist(err) {
+		t.Fatal("Config file was not created")
+	}
+
+	// Test Load
+	loadedCfg, err := LoadFromPath(tempFile)
+	if err != nil {
+		t.Fatalf("Failed to load config: %v", err)
+	}
+
+	// Verify loaded config matches saved config
+	if len(loadedCfg.Hosts) != 2 {
+		t.Errorf("Expected 2 hosts, got %d", len(loadedCfg.Hosts))
+	}
+
+	// Check codeberg.org host
+	codebergHost, ok := loadedCfg.Hosts["codeberg.org"]
+	if !ok {
+		t.Fatal("codeberg.org host not found in loaded config")
+	}
+	if codebergHost.Token != "test-token-123" {
+		t.Errorf("Expected token 'test-token-123', got '%s'", codebergHost.Token)
+	}
+	if codebergHost.User != "testuser" {
+		t.Errorf("Expected user 'testuser', got '%s'", codebergHost.User)
+	}
+	if codebergHost.GitProtocol != "ssh" {
+		t.Errorf("Expected git_protocol 'ssh', got '%s'", codebergHost.GitProtocol)
+	}
+
+	// Check github.com host
+	githubHost, ok := loadedCfg.Hosts["github.com"]
+	if !ok {
+		t.Fatal("github.com host not found in loaded config")
+	}
+	if githubHost.Token != "github-token-456" {
+		t.Errorf("Expected token 'github-token-456', got '%s'", githubHost.Token)
+	}
+}
+
+func TestConfig_LoadNonexistentFile(t *testing.T) {
+	tempDir := t.TempDir()
+	tempFile := filepath.Join(tempDir, "nonexistent.yaml")
+
+	// Test Load with nonexistent file
+	cfg, err := LoadFromPath(tempFile)
+	if err != nil {
+		t.Fatalf("Load should not error on nonexistent file: %v", err)
+	}
+
+	// Should return empty config
+	if cfg == nil {
+		t.Fatal("Config should not be nil")
+	}
+
+	if cfg.Hosts == nil {
+		t.Fatal("Hosts map should be initialized")
+	}
+
+	if len(cfg.Hosts) != 0 {
+		t.Errorf("Expected empty hosts map, got %d entries", len(cfg.Hosts))
+	}
+}
+
+func TestConfig_LoadInvalidYAML(t *testing.T) {
+	tempDir := t.TempDir()
+	tempFile := filepath.Join(tempDir, "invalid.yaml")
+
+	// Write invalid YAML
+	err := os.WriteFile(tempFile, []byte("invalid: yaml: content: [[["), 0600)
+	if err != nil {
+		t.Fatalf("Failed to write invalid YAML: %v", err)
+	}
+
+	// Test Load with invalid YAML
+	_, err = LoadFromPath(tempFile)
+	if err == nil {
+		t.Error("Expected error when loading invalid YAML")
+	}
+}
+
+func TestConfig_SaveCreatesDirectory(t *testing.T) {
+	tempDir := t.TempDir()
+	tempFile := filepath.Join(tempDir, "subdir", "config.yaml")
+
+	cfg := &Config{
+		Hosts: map[string]HostConfig{
+			"test.org": {
+				Hostname: "test.org",
+				Token:    "token",
+			},
+		},
+	}
+
+	// Save should create the directory
+	err := cfg.SaveToPath(tempFile)
+	if err != nil {
+		t.Fatalf("Failed to save config: %v", err)
+	}
+
+	// Verify directory was created
+	subdir := filepath.Dir(tempFile)
+	if _, err := os.Stat(subdir); os.IsNotExist(err) {
+		t.Error("Save() should have created the directory")
+	}
+
+	// Verify file exists
+	if _, err := os.Stat(tempFile); os.IsNotExist(err) {
+		t.Error("Config file was not created")
+	}
+}