Shader template for creating Unlit shader in Unity's URP.

84-Shader__URP Unlit Shader-NewURPUnlitShader.shader.txt

Shader "Unlit/#NAME#"
{
    Properties
    { }

    SubShader
    {
        Tags { "RenderType" = "Opaque" "RenderPipeline" = "UniversalPipeline" }

        Pass
        {
            HLSLPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"

            struct Attributes
            {
                float4 positionOS   : POSITION;
            };

            struct Varyings
            {
                float4 positionHCS  : SV_POSITION;
            };

            Varyings vert(Attributes IN)
            {
                Varyings OUT;
                OUT.positionHCS = TransformObjectToHClip(IN.positionOS.xyz);
                return OUT;
            }

            half4 frag() : SV_Target
            {
                half4 customColor = half4(0.5, 0, 0, 1);
                return customColor;
            }
            ENDHLSL
        }
    }
}

Info.txt

This is a shader template to create an Unlit shader for Unity's URP. The boilerplate code for a URP unlit shader is different from that of a Legacy Render Pipeline unlit shader. Mainly the includes, macros and tags, but maybe also a few other things. To use this template download the template file from this gist and place it in the following folder of your Unity Editor's installation:
%EDITOR%\Editor\Data\Resources\ScriptTemplates

This is a very basic unlit shader. You can change the template to suit your needs (additional properties, different pipeline, etc.).
Tested with Unity 2021.3.5f1.