diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 000000000..d207b1802
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+*.go text eol=lf
diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 26e4d743c..700c12f75 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -8,57 +8,23 @@ on:
       - v*
 
 jobs:
-  test-linux:
-    name: Test (Linux)
-    runs-on: ubuntu-latest
-    steps:
-      - name: Set up Go 1.x
-        uses: actions/setup-go@v5
-        with:
-          go-version: 1.20.x
-      - name: Check out code into the Go module directory
-        uses: actions/checkout@v4
-      - uses: golangci/golangci-lint-action@v3
-      - run: make convention
-      - run: make cover
-      - run: test "$(gofmt -l . | wc -l)" = 0
-      - uses: shogo82148/actions-goveralls@v1
-        with:
-          path-to-profile: .profile.cov
-
-  test-windows:
-    name: Test (Windows)
-    # Please do not specify `windows-latest`
-    # Build process is complex then need to check operation.
-    runs-on: windows-2022
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Setup Go
-        uses: actions/setup-go@v5
-        with:
-          go-version: 1.20.x
-
-      - uses: golangci/golangci-lint-action@v3
-        with:
-          args: --timeout 5m
-      - uses: actions/cache@v3
-        with:
-          path: |
-            ~/go/pkg/mod
-          key: ${{ runner.os }}-go-${{ hashFiles('**\go.sum') }}
-          restore-keys: |
-            ${{ runner.os }}-go-
-
-      - name: Run Test
-        run: |
-          go test -short ./...
-        shell: bash
+  lint:
+    uses: mackerelio/workflows/.github/workflows/go-lint.yml@v1.1.0
+  convention:
+    uses: mackerelio/workflows/.github/workflows/setup-go-matrix.yml@v1.1.0
+    with:
+      run: make convention
+  test:
+    uses: mackerelio/workflows/.github/workflows/go-test.yml@v1.1.0
+    with:
+      # Please do not specify `windows-latest`
+      # Build process is complex then need to check operation.
+      os-versions: '["ubuntu-latest", "windows-2022"]'
 
   build-linux:
     name: Build (Linux)
     runs-on: ubuntu-latest
-    needs: test-linux
+    needs: test
     if: github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/v')
     env:
       DEBIAN_FRONTEND: noninteractive
@@ -95,7 +61,7 @@ jobs:
   build-windows:
     name: Build (Windows)
     runs-on: windows-2022
-    needs: test-windows
+    needs: test
     if: github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/v')
     strategy:
       matrix:
diff --git a/.gitignore b/.gitignore
index 43868cb9c..65ea65feb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 !.circleci
 !.dependabot
 !.github
+!.gitattributes
 !.gitignore
 !.goxc.json
 !.travis.yml
diff --git a/.golangci.yml b/.golangci.yml
index 571d18bff..ed7b28d12 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -1,3 +1,9 @@
+linters:
+  enable:
+    - gofmt
+linters-settings:
+  gofmt:
+    simplify: true
 issues:
   exclude-rules:
     - path: _test\.go
diff --git a/command/command_test.go b/command/command_test.go
index 4899da840..1de72cec9 100644
--- a/command/command_test.go
+++ b/command/command_test.go
@@ -240,10 +240,10 @@ func TestCollectHostParamWithChecks(t *testing.T) {
 	customIdentifier := "app.example.com"
 	conf := config.Config{
 		CheckPlugins: map[string]*config.CheckPlugin{
-			"chk1": &config.CheckPlugin{
+			"chk1": {
 				CustomIdentifier: nil,
 			},
-			"chk2": &config.CheckPlugin{
+			"chk2": {
 				CustomIdentifier: &customIdentifier,
 			},
 		},
diff --git a/metrics/agent.go b/metrics/agent.go
index cc08f8e87..f486e9495 100644
--- a/metrics/agent.go
+++ b/metrics/agent.go
@@ -37,7 +37,7 @@ func (g *AgentGenerator) CustomIdentifier() *string {
 func (g *AgentGenerator) PrepareGraphDefs() ([]*mkr.GraphDefsParam, error) {
 	meta := &pluginMeta{
 		Graphs: map[string]customGraphDef{
-			"agent.memory": customGraphDef{
+			"agent.memory": {
 				Label: "Agent Memory",
 				Unit:  "bytes",
 				Metrics: []customGraphMetricDef{
@@ -47,7 +47,7 @@ func (g *AgentGenerator) PrepareGraphDefs() ([]*mkr.GraphDefsParam, error) {
 					{Name: "heapSys", Label: "Heap Sys"},
 				},
 			},
-			"agent.runtime": customGraphDef{
+			"agent.runtime": {
 				Label: "Agent Runtime",
 				Unit:  "integer",
 				Metrics: []customGraphMetricDef{