diff --git a/pkg/providers/anthropic_messages/provider.go b/pkg/providers/anthropic_messages/provider.go
index 2e53f81dc..0f362dd39 100644
--- a/pkg/providers/anthropic_messages/provider.go
+++ b/pkg/providers/anthropic_messages/provider.go
@@ -107,7 +107,7 @@ func (p *Provider) Chat(
 
 	// Set headers
 	req.Header.Set("Content-Type", "application/json")
-	req.Header.Set("X-API-Key", p.apiKey)
+	req.Header.Set("X-API-Key", p.apiKey) //nolint:canonicalheader // Anthropic API requires exact header name
 	req.Header.Set("Anthropic-Version", defaultAPIVersion)
 
 	// Execute request
diff --git a/pkg/providers/anthropic_messages/provider_test.go b/pkg/providers/anthropic_messages/provider_test.go
index 8025d6d1f..36a582412 100644
--- a/pkg/providers/anthropic_messages/provider_test.go
+++ b/pkg/providers/anthropic_messages/provider_test.go
@@ -328,7 +328,8 @@ func TestParseResponseBody(t *testing.T) {
 					t.Errorf("Usage.PromptTokens = %d, want %d", got.Usage.PromptTokens, tt.want.Usage.PromptTokens)
 				}
 				if got.Usage.CompletionTokens != tt.want.Usage.CompletionTokens {
-					t.Errorf("Usage.CompletionTokens = %d, want %d", got.Usage.CompletionTokens, tt.want.Usage.CompletionTokens)
+					t.Errorf("Usage.CompletionTokens = %d, want %d",
+						got.Usage.CompletionTokens, tt.want.Usage.CompletionTokens)
 				}
 				if got.Usage.TotalTokens != tt.want.Usage.TotalTokens {
 					t.Errorf("Usage.TotalTokens = %d, want %d", got.Usage.TotalTokens, tt.want.Usage.TotalTokens)
@@ -339,10 +340,12 @@ func TestParseResponseBody(t *testing.T) {
 			} else {
 				for i := range got.ToolCalls {
 					if got.ToolCalls[i].ID != tt.want.ToolCalls[i].ID {
-						t.Errorf("ToolCalls[%d].ID = %q, want %q", i, got.ToolCalls[i].ID, tt.want.ToolCalls[i].ID)
+						t.Errorf("ToolCalls[%d].ID = %q, want %q",
+							i, got.ToolCalls[i].ID, tt.want.ToolCalls[i].ID)
 					}
 					if got.ToolCalls[i].Name != tt.want.ToolCalls[i].Name {
-						t.Errorf("ToolCalls[%d].Name = %q, want %q", i, got.ToolCalls[i].Name, tt.want.ToolCalls[i].Name)
+						t.Errorf("ToolCalls[%d].Name = %q, want %q",
+							i, got.ToolCalls[i].Name, tt.want.ToolCalls[i].Name)
 					}
 				}
 			}
diff --git a/pkg/providers/factory_provider.go b/pkg/providers/factory_provider.go
index 4d11551e3..96699f6d6 100644
--- a/pkg/providers/factory_provider.go
+++ b/pkg/providers/factory_provider.go
@@ -54,7 +54,8 @@ func ExtractProtocol(model string) (protocol, modelID string) {
 
 // CreateProviderFromConfig creates a provider based on the ModelConfig.
 // It uses the protocol prefix in the Model field to determine which provider to create.
-// Supported protocols: openai, litellm, anthropic, anthropic-messages, antigravity, claude-cli, codex-cli, github-copilot
+// Supported protocols: openai, litellm, anthropic, anthropic-messages, antigravity,
+// claude-cli, codex-cli, github-copilot
 // Returns the provider, the model ID (without protocol prefix), and any error.
 func CreateProviderFromConfig(cfg *config.ModelConfig) (LLMProvider, string, error) {
 	if cfg == nil {