feat: migrate golangci-lint from v1 to v2 (#144)

Migrate golangci-lint from v1 to v2.

## Motivation and Context
The golangci-lint has been upgraded to v2 since March 2025.
The v2 of golangci-lint has simplified the linters management.

## How Has This Been Tested?
Tested locally with golangci-lint@v2.1.6

## Breaking Changes
No.

## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->

---------

Co-authored-by: haokunt <haokunt@opera.com>
Co-authored-by: Avinash Sridhar <sridharavinash@users.noreply.github.com>
Co-authored-by: Adam Jones <adamj+git@anthropic.com>

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
         
     - name: Install golangci-lint
       run: |
-        curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.61.0
+        curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v2.3.1
         
     - name: Run golangci-lint
       run: golangci-lint run --timeout=5m

.gitignore

@@ -4,6 +4,7 @@ build/*
 .mcpregistry*
 **/bin
 cmd/registry/registry
+.DS_Store
 validate-examples
 validate-schemas
 .idea/

.golangci.yml

@@ -1,19 +1,11 @@
 # GolangCI-Lint configuration
 # See: https://golangci-lint.run/usage/configuration/
 
+version: "2"
 run:
-  timeout: 5m
   modules-download-mode: readonly
-
 linters:
   enable:
-    - errcheck
-    - gosimple
-    - govet
-    - ineffassign
-    - staticcheck
-    - typecheck
-    - unused
     - asasalint
     - asciicheck
     - bidichk
@@ -28,14 +20,11 @@ linters:
     - exhaustive
     - forbidigo
     - funlen
-    - gci
     - gocognit
     - goconst
     - gocritic
     - gocyclo
     - godox
-    - gofmt
-    - goimports
     - gomoddirectives
     - gomodguard
     - goprintffuncname
@@ -59,8 +48,7 @@ linters:
     - revive
     - rowserrcheck
     - sqlclosecheck
-    - stylecheck
+    - staticcheck
-    - tenv
     - testpackage
     - thelper
     - tparallel
@@ -69,55 +57,69 @@ linters:
     - usestdlibvars
     - wastedassign
     - whitespace
-
+  settings:
-linters-settings:
+    cyclop:
-  revive:
+      max-complexity: 50
+    funlen:
+      lines: 150
+      statements: 150
+    gocognit:
+      min-complexity: 50
+    goconst:
+      min-len: 3
+      min-occurrences: 3
+    gocyclo:
+      min-complexity: 25
+    lll:
+      line-length: 150
+    misspell:
+      locale: US
+    mnd:
+      checks:
+        - argument
+        - case
+        - condition
+        - operation
+        - return
+    nestif:
+      min-complexity: 8
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
     rules:
-      - name: use-any
+      - linters:
-        disabled: false
+          - dupl
-        severity: error
+          - errcheck
-  cyclop:
+          - funlen
-    max-complexity: 50
+          - gocyclo
-  funlen:
+          - gosec
-    lines: 150
+          - mnd
-    statements: 150
+        path: _test\.go
-  gocognit:
+      - linters:
-    min-complexity: 50
+          - lll
-  gocyclo:
+        path: docs/
-    min-complexity: 25
+      - linters:
-  goconst:
+          - mnd
-    min-len: 3
+        path: integrationtests/
-    min-occurrences: 3
+      - linters:
-  mnd:
+          - gomoddirectives
-    checks:
+        path: go\.mod
-      - argument
+    paths:
-      - case
+      - third_party$
-      - condition
+      - builtin$
-      - operation
+      - examples$
-      - return
+formatters:
-  lll:
+  enable:
-    line-length: 150
+    - gci
-  misspell:
+    - gofmt
-    locale: US
+    - goimports
-  nestif:
+  exclusions:
-    min-complexity: 8
+    generated: lax
-
+    paths:
-issues:
+      - third_party$
-  exclude-rules:
+      - builtin$
-    # Exclude some linters from running on tests files.
+      - examples$
-    - path: _test\.go
-      linters:
-        - mnd
-        - funlen
-        - gocyclo
-        - errcheck
-        - dupl
-        - gosec
-    # Ignore long lines in generated code
-    - path: docs/
-      linters:
-        - lll
-    # Allow local replacement directives in go.mod
-    - path: go\.mod
-      linters:
-        - gomoddirectives

CLAUDE.md

@@ -10,9 +10,9 @@ MCP Registry is a community-driven registry service for Model Context Protocol (
 ### Prerequisites
 - **Go 1.23.x** - The project requires this specific version (check with `go version`)
   - Consider using a Go version manager like `g` or `gvm` if you work on multiple projects
-- **golangci-lint v1.61.0** - Install with:
+- **golangci-lint v2.3.1** - Install with:
   ```bash
-  curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.61.0
+  curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v2.3.1
   ```
 
 ### Git Hooks (Optional)
@@ -72,7 +72,7 @@ gofmt -s -l .
 gofmt -s -w .
 ```
 
-**Note**: The project uses golangci-lint v1.61.0 with 62 enabled linters. Always run linting locally before pushing to avoid CI failures.
+**Note**: The project uses golangci-lint v2.3.1 with 62 enabled linters. Always run linting locally before pushing to avoid CI failures.
 
 ## Architecture Overview
 

README.md

@@ -29,9 +29,9 @@ The MCP Registry service provides a centralized repository for MCP server entrie
 - Docker (optional, but recommended for development)
 
 For development:
-- golangci-lint v1.61.0 - Install with:
+- golangci-lint v2.3.1 - Install with:
   ```bash
-  curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.61.0
+  curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v2.3.1
   ```
 
 ## Running

internal/api/handlers/v0/publish_test.go

@@ -23,17 +23,17 @@ type MockRegistryService struct {
 }
 
 func (m *MockRegistryService) List(cursor string, limit int) ([]model.Server, string, error) {
-	args := m.Mock.Called(cursor, limit)
+	args := m.Called(cursor, limit)
 	return args.Get(0).([]model.Server), args.String(1), args.Error(2)
 }
 
 func (m *MockRegistryService) GetByID(id string) (*model.ServerDetail, error) {
-	args := m.Mock.Called(id)
+	args := m.Called(id)
 	return args.Get(0).(*model.ServerDetail), args.Error(1)
 }
 
 func (m *MockRegistryService) Publish(serverDetail *model.ServerDetail) error {
-	args := m.Mock.Called(serverDetail)
+	args := m.Called(serverDetail)
 	return args.Error(0)
 }
 
@@ -45,17 +45,17 @@ type MockAuthService struct {
 func (m *MockAuthService) StartAuthFlow(
 	ctx context.Context, method model.AuthMethod, repoRef string,
 ) (map[string]string, string, error) {
-	args := m.Mock.Called(ctx, method, repoRef)
+	args := m.Called(ctx, method, repoRef)
 	return args.Get(0).(map[string]string), args.String(1), args.Error(2)
 }
 
 func (m *MockAuthService) CheckAuthStatus(ctx context.Context, statusToken string) (string, error) {
-	args := m.Mock.Called(ctx, statusToken)
+	args := m.Called(ctx, statusToken)
 	return args.String(0), args.Error(1)
 }
 
 func (m *MockAuthService) ValidateAuth(ctx context.Context, authentication model.Authentication) (bool, error) {
-	args := m.Mock.Called(ctx, authentication)
+	args := m.Called(ctx, authentication)
 	return args.Bool(0), args.Error(1)
 }
 
@@ -416,8 +416,8 @@ func TestPublishHandler(t *testing.T) {
 			}
 
 			// Assert that all expectations were met
-			mockRegistry.Mock.AssertExpectations(t)
+			mockRegistry.AssertExpectations(t)
-			mockAuthService.Mock.AssertExpectations(t)
+			mockAuthService.AssertExpectations(t)
 		})
 	}
 }
@@ -487,7 +487,7 @@ func TestPublishHandlerBearerTokenParsing(t *testing.T) {
 			handler.ServeHTTP(rr, req)
 
 			assert.Equal(t, http.StatusCreated, rr.Code)
-			mockAuthService.Mock.AssertExpectations(t)
+			mockAuthService.AssertExpectations(t)
 		})
 	}
 }
@@ -552,7 +552,7 @@ func TestPublishHandlerAuthMethodSelection(t *testing.T) {
 			handler.ServeHTTP(rr, req)
 
 			assert.Equal(t, http.StatusCreated, rr.Code)
-			mockAuthService.Mock.AssertExpectations(t)
+			mockAuthService.AssertExpectations(t)
 		})
 	}
 }
@@ -639,9 +639,9 @@ func TestPublishIntegration(t *testing.T) {
 		// Verify the server was actually published by retrieving it
 		publishedServer, err := registryService.GetByID(response["id"])
 		require.NoError(t, err)
-		assert.Equal(t, publishReq.ServerDetail.Name, publishedServer.Name)
+		assert.Equal(t, publishReq.Name, publishedServer.Name)
-		assert.Equal(t, publishReq.ServerDetail.Description, publishedServer.Description)
+		assert.Equal(t, publishReq.Description, publishedServer.Description)
-		assert.Equal(t, publishReq.ServerDetail.VersionDetail.Version, publishedServer.VersionDetail.Version)
+		assert.Equal(t, publishReq.VersionDetail.Version, publishedServer.VersionDetail.Version)
 		assert.Len(t, publishedServer.Packages, 1)
 		assert.Len(t, publishedServer.Remotes, 1)
 	})

internal/api/handlers/v0/servers.go

@@ -60,12 +60,8 @@ func ServersHandler(registry service.RegistryService) http.HandlerFunc {
 				return
 			}
 
-			if parsedLimit > 100 {
+			// Cap maximum limit to prevent excessive queries
-				// Cap maximum limit to prevent excessive queries
+			limit = min(parsedLimit, 100)
-				limit = 100
-			} else {
-				limit = parsedLimit
-			}
 		}
 
 		// Use the GetAll method to get paginated results

internal/api/handlers/v0/servers_test.go

@@ -257,7 +257,7 @@ func TestServersHandler(t *testing.T) {
 			}
 
 			// Verify mock expectations
-			mockRegistry.Mock.AssertExpectations(t)
+			mockRegistry.AssertExpectations(t)
 		})
 	}
 }
@@ -321,7 +321,7 @@ func TestServersHandlerIntegration(t *testing.T) {
 	assert.Empty(t, paginatedResp.Metadata.NextCursor)
 
 	// Verify mock expectations
-	mockRegistry.Mock.AssertExpectations(t)
+	mockRegistry.AssertExpectations(t)
 }
 
 // TestServersDetailHandlerIntegration tests the servers detail handler with actual HTTP requests
@@ -387,5 +387,5 @@ func TestServersDetailHandlerIntegration(t *testing.T) {
 	assert.Equal(t, *serverDetail, serverDetailResp)
 
 	// Verify mock expectations
-	mockRegistry.Mock.AssertExpectations(t)
+	mockRegistry.AssertExpectations(t)
 }

internal/database/memory.go

@@ -48,10 +48,7 @@ func compareSemanticVersions(version1, version2 string) int {
 	parts2 := strings.Split(version2, ".")
 
 	// Pad with zeros if needed
-	maxLen := len(parts1)
+	maxLen := max(len(parts2), len(parts1))
-	if len(parts2) > maxLen {
-		maxLen = len(parts2)
-	}
 
 	for len(parts1) < maxLen {
 		parts1 = append(parts1, "0")
@@ -162,10 +159,7 @@ func (db *MemoryDB) List(
 	})
 
 	// Apply pagination
-	endIdx := startIdx + limit
+	endIdx := min(startIdx+limit, len(filteredEntries))
-	if endIdx > len(filteredEntries) {
-		endIdx = len(filteredEntries)
-	}
 
 	var result []*model.Server
 	if startIdx < len(filteredEntries) {