A Real-Life Scenario
Last weekwhile chopping vegetablesI slashed the webbing between my thumb and index fingerHonestlyI was wide awake in an instantThe kitchen floor looked like I had butchered a chickenMy mind went blank; my first instinct was to grab the first-aid kitBut the cotton swabs were expiredthe iodine bottle had dried upand while there were band-aids leftthe cut was fairly deep—just slapping a band-aid on it didn't feel safeThen I remembered: the Yorukusu app on my phone has a minor-injury skillI quickly opened ittapped inand—wow—the steps were crystal clearfar more reliable than the ads I'd find on Baidu.
This skill is actually a Claude skill called minor-injurycreated by a developer named Guttyo and hosted on GitHubYou can find it in his yorukusu project at the path .claude/skills/minor-injuryIn plain termsit's a digital first-aid manual dedicated to teaching you how to handle common minor injuries.
What Can This Skill Do?
Don't underestimate it—it covers quite a range of scenarios:
- Abrasions – like when you scrape your knee after falling off a bicycle.
- Cuts – like my kitchen accidentor a paper cut (those thin little wounds actually hurt more).
- Burns – from boiling waterhot oilor steameven if it's just a small red patch.
- Sprains – like twisting your ankle while walking or spraining your wrist during sports.
- Puncture wounds – stepping on a nail or getting pricked by a splinter (but not too deep).
For each type of injurythe skill provides a corresponding treatment procedureTake cutsfor exampleIt tells you: first stop the bleeding without rushing to apply medicine; rinse the wound with clean water to remove debris—do not use hydrogen peroxide (it damages cells); then disinfect with iodine; finallybandage according to the wound sizeIt especially warns against spraying alcohol directly on the wound—it hurts like crazy and hinders healingThese details are incredibly practical.
How to Install It into My Claude?
Installation is pretty simple—just one commandYou'll need Node.js and npm installed on your computer (if you can read this tutorialyou probably already have them)Then open your terminal and run:
npx skills add Guttyo/yorukusu --skill minor-injuryThis command pulls the skill called minor-injury from Guttyo's GitHub repository and adds it to your Claude skill setOnce it finishesyou can use it in the Claude dialog boxFor exampleyou can type: "I scalded my finger with boiling waterWhat should I do?" and Claude will automatically invoke this skill to answer.
If you'd rather not install it locallyyou can also use 's online version by clicking the "Run in " buttonsaving you the hassle of local setupI won't go into detail on howworks—just give it a try.
Real User Experience: Is It Actually Good?
After installing itI tested it a couple of timesThe first time I asked"I got a small paper cut on my fingerDo I need a tetanus shot?" It first analyzed wound depth and contamination levelthen provided criteria: if it's a superficial cut from clean papera tetanus shot is generally unnecessary; but if there's rustdirtor the wound is deepyou should consult a medical facilityThe advice was well-balanced—not immediately sending you to the hospitalbut not dismissing it either.
Second timeI simulated a scenario: "I fell while runningscraped my knee badlyand there are sand particles embedded in the wound." The steps it gave: rinse off large particles with clean water—gently remove sand with tweezers—flush the wound with saline or running water—disinfect with iodine—apply antibiotic ointment—cover with sterile gauzeIf signs of infection appear (increased rednessswellingfever)seek medical attention promptlyThe guidance was very structuredwith excellent attention to detail.
HoweverI did notice one minor issue: there are no pictures or videos—pure text descriptionsFor techniques that require visual guidancelike bandaging methodstext can be a bit abstractFor instanceit says "wrap the gauze using the circular bandaging method." Without a picturea beginner might be confusedBut the good news is that because it's conversationalyou can ask follow-ups like "Can you explain the circular bandaging method in detail?" and it will elaborateSo overallthe experience is still smooth.
Two Pitfalls I Fell Into—You Should Avoid Them
Don't dump every problem on it. This skill is only suitable for truly minor injuriesIf you're bleeding heavily and can't stop itthe wound is very deep (you can see fat or bone)or you have systemic symptoms (dizzinessfeverrapid heartbeat)call emergency services immediately or go to the ERThe skill's documentation also states: for serious traumathis is not a substitute for medical treatment.
Make sure the skill name in the install command is spelled correctly. The first time I triedI typed minor-enjury by mistakeand it threw an error saying it couldn't be foundCapitalization doesn't matterbut spelling does.
Advanced Usage: You Can Customize It Too
Since it's an open-source projectyou can modify the SKILL.md file to tailor the contentFor exampleif you think it lacks treatment for animal bitesor you want to convert the units to your preferred systemjust edit the file in the repository and reinstallOf courseyou'll need some familiarity with Git and Markdownbut it's not difficultGuttyo's repository is under the MIT licenseso you can freely modify it.
By the wayif you haven't installed the Yorukusu app itself—it's an iOS app—but this skill can run independently without the appSo even if you don't use Yorukusuyou can still use this Claude skill on its ownThat's very user-friendly.
Final Thoughts
All in allthis minor-injury skill feels like having a talking first-aid kit at home—one that's available 24/7 and won't run awayFor families with kidspeople who often go outdoorsor klutzes like me who cook in the kitchenit's worth installingWhile it can't replace a professional doctorwhen you encounter small bumps and bruisesit helps you stay calm and follow the correct steps
