diff --git a/cmd/workspace/cmd_agent.go b/cmd/workspace/cmd_agent.go
index a25cbf7..8d0697e 100644
--- a/cmd/workspace/cmd_agent.go
+++ b/cmd/workspace/cmd_agent.go
@@ -23,6 +23,7 @@ package workspace
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"path/filepath"
 	"strings"
@@ -92,7 +93,7 @@ func agentContextPath(wsPath, provider, name string) string {
 func parseAgentID(id string) (provider, name string, err error) {
 	parts := strings.SplitN(id, "/", 2)
 	if len(parts) != 2 || parts[0] == "" || parts[1] == "" {
-		return "", "", fmt.Errorf("agent ID must be provider/agent-name (e.g. claude-opus/qa)")
+		return "", "", errors.New("agent ID must be provider/agent-name (e.g. claude-opus/qa)")
 	}
 	return parts[0], parts[1], nil
 }
diff --git a/cmd/workspace/config.go b/cmd/workspace/config.go
index 91a5303..b5ad997 100644
--- a/cmd/workspace/config.go
+++ b/cmd/workspace/config.go
@@ -1,6 +1,7 @@
 package workspace
 
 import (
+	"errors"
 	"fmt"
 	"os"
 	"path/filepath"
@@ -99,5 +100,5 @@ func FindWorkspaceRoot() (string, error) {
 		dir = parent
 	}
 
-	return "", fmt.Errorf("not in a workspace")
+	return "", errors.New("not in a workspace")
 }