This is a searchable and complete list of Sims 4 skill cheats. To enable this cheat, first open the cheat cobsole by pressing Control Shift C and testingcheats true
The skill cheat command is Stats.Set_Skill_Level skill level. You need to input both the skill name and level. For example, Stats.set_skill_level major_handiness 7 will set handiness to level 7. The cheats below list out all the possible skills and their max levels. Note that the skill name is different for fitness, children's, toddler's, and minor skills. Search the list below for the exact syntax. If you do not want to max out a skill, replace the level with your preferred skill level (this can range from 1 to 9).
stats.set_skill_level Major_Writing 10
stats.set_skill_level Major_Wellness 10
stats.set_skill_level Major_Violin 10
stats.set_skill_level Major_VideoGaming 10
stats.set_skill_level Major_Vet 10
stats.set_skill_level VampireLore 15
stats.set_skill_level Skill_Toddler_Thinking 5
stats.set_skill_level Skill_Child_Social 10
stats.set_skill_level Hidden_Skating 5
stats.set_skill_level Major_Singing 10
stats.set_skill_level Minor_LocalCulture 5
stats.set_skill_level Major_RocketScience 10
stats.set_skill_level Skill_Hidden_TreadMill 5
stats.set_skill_level Major_Robotics 10
stats.set_skill_level retail_sales 5
stats.set_skill_level retail_maintenance 5
stats.set_skill_level retail_workethic 5
stats.set_skill_level Major_ResearchDebate 10
stats.set_skill_level Major_Programming 10
stats.set_skill_level Skill_Toddler_Potty 3
stats.set_skill_level Major_PipeOrgan 10
stats.set_skill_level Major_Piano 10
stats.set_skill_level Major_Photography 10
stats.set_skill_level skill_Dog 5
stats.set_skill_level Major_Parenting 10
stats.set_skill_level Major_Painting 10
stats.set_skill_level Skill_Toddler_Movement 5
stats.set_skill_level Skill_Child_Motor 10
stats.set_skill_level Major_Bartending 10
stats.set_skill_level Major_Mischief 10
stats.set_skill_level Skill_Child_Mental 10
stats.set_skill_level Minor_Media 5
stats.set_skill_level Major_Logic 10
stats.set_skill_level AdultMajor_Knitting 10
stats.set_skill_level AdultMajor_Knitting 10
stats.set_skill_level AdultMinor_JuiceFizzing 5
stats.set_skill_level Skill_Toddler_Imagination 5
stats.set_skill_level Major_Herbalism 10
stats.set_skill_level Major_Handiness 10
stats.set_skill_level Major_Guitar 10
stats.set_skill_level Major_GourmetCooking 10
stats.set_skill_level Major_Gardening 10
stats.set_skill_level statistic_skill_AdultMajor_FlowerArranging 10
stats.set_skill_level Skill_Fitness 10
stats.set_skill_level Major_Fishing 10
stats.set_skill_level AdultMajor_Fabrication 10
stats.set_skill_level Major_DJ 10
stats.set_skill_level Minor_Dancing 5
stats.set_skill_level Skill_Child_Creativity 10
stats.set_skill_level Major_HomestyleCooking 10
stats.set_skill_level Skill_Toddler_Communication 5
stats.set_skill_level Major_Comedy 10
stats.set_skill_level Major_Charisma 10
stats.set_skill_level Skill_Bowling 5
stats.set_skill_level Major_Baking 10
stats.set_skill_level Major_Archaeology 10
stats.set_skill_level Major_Acting 10