diff --git a/agent.go b/agent.go
index 103a1345b3c2f1d7553ff4a400b3b65b2178bea2..6f628b0a7a593681d8001f9f0f0637ac736f807b 100644
--- a/agent.go
+++ b/agent.go
@@ -767,7 +767,7 @@ func (a *agent) Stream(ctx context.Context, opts AgentStreamCall) (*AgentResult,
 
 		// Start step stream
 		if opts.OnStepStart != nil {
-			opts.OnStepStart(stepNumber)
+			_ = opts.OnStepStart(stepNumber)
 		}
 
 		// Create streaming call
@@ -808,7 +808,7 @@ func (a *agent) Stream(ctx context.Context, opts AgentStreamCall) (*AgentResult,
 
 		// Call step finished callback
 		if opts.OnStepFinish != nil {
-			opts.OnStepFinish(stepResult)
+			_ = opts.OnStepFinish(stepResult)
 		}
 
 		// Add step messages to response messages
@@ -834,7 +834,7 @@ func (a *agent) Stream(ctx context.Context, opts AgentStreamCall) (*AgentResult,
 	}
 
 	if opts.OnAgentFinish != nil {
-		opts.OnAgentFinish(agentResult)
+		_ = opts.OnAgentFinish(agentResult)
 	}
 
 	return agentResult, nil
diff --git a/providers/anthropic.go b/providers/anthropic.go
index 61ea657896a549343d4c038166b3babee6400e2b..a8924a09db13db7e65fa0c35fd695992c1d39a3a 100644
--- a/providers/anthropic.go
+++ b/providers/anthropic.go
@@ -775,7 +775,7 @@ func (a anthropicLanguageModel) Stream(ctx context.Context, call ai.Call) (ai.St
 
 		for stream.Next() {
 			chunk := stream.Current()
-			acc.Accumulate(chunk)
+			_ = acc.Accumulate(chunk)
 			switch chunk.Type {
 			case "content_block_start":
 				contentBlockType := chunk.ContentBlock.Type