Stop explaining yourself from scratch at every appointment.
Log crashes in 60 seconds, get a weekly summary letter your doctor can actually read — with PEM events flagged, triggers named, and quality-of-life impact spelled out in clinical language.
$9.99
Works in Claude + ChatGPT
01Log a crash in under 60 seconds — just talk like you're texting a friend, the skill structures it automatically.
02PEM events are flagged and timestamped so you can show exactly how long crashes last and what triggered them.
03Weekly provider letter your PCP can read in 90 seconds: symptom trends, triggers, QoL impact, and your questions for the visit.
04Clinical language built in — words like 'post-exertional malaise' and 'orthostatic intolerance' that GPs respond to differently than 'I was tired'.
05Tracks medications, supplements, and sleep alongside symptoms so patterns surface across weeks, not just single bad days.
06Includes a PEM explainer you can paste into your notes if your provider still thinks graded exercise therapy is appropriate.
What it does
Most symptom trackers were built for headaches and hydration. This one was built for the specific hell of Long COVID: crashes that hit 48 hours after the activity, brain fog that makes logging feel impossible, and appointments where you spend the whole 15 minutes trying to remember what happened two weeks ago.
DIARY MODE takes a quick, low-effort check-in — energy, fog, pain, sleep, what you did, how you feel now — and structures it into a timestamped entry with PEM flags when the pattern fits. You don't need to fill out a form. You just type what you'd tell a friend.
LETTER MODE pulls your week's entries into a provider summary using the bundled `provider-letter-template.md`, written in the clinical language that gets taken seriously in a chart. It covers your symptom trends, confirmed crash events and recovery times, suspected triggers, current meds and supplements, and your specific questions for the visit — ready to paste into an email or hand over at the desk. For patients who are new to PEM or unsure how to describe it, the bundled `pem-education.md` resource provides clear language you can borrow directly in your notes.
Frequently asked
Does it just log symptoms, or does it actually write the letter for my doctor?
Both. Diary mode structures your daily check-ins and flags PEM events. Letter mode generates a full provider summary — trends, crash events with recovery times, triggers, QoL impact, your meds, and your appointment questions — using a clinical letter template built into the skill. You can copy it into an email or print it.
My GP already dismisses me. Will a letter actually change anything?
No skill can fix a bad doctor. What this does is give you a documented, clinically-worded record that's harder to wave away than 'I've been tired.' Showing two confirmed PEM crashes with 3-day recovery times and specific triggers is different from saying 'I crash after activity.' Some patients use it to get referrals to Long COVID clinics; others use it for disability paperwork.
I can barely think on bad days. Is logging actually going to take 60 seconds?
Yes, that's the design. You don't fill out a form — you just type something like 'energy 3, fog bad, pain 5, zoom call this morning now I feel destroyed.' The skill structures it. If you can send a text, you can log an entry.
I'm having chest pain and breathing problems. Will this help me figure out what to do?
No — and the skill will tell you that directly. It's a diary and documentation tool, not a triage or diagnostic tool. Acute symptoms like chest pain or breathing difficulty mean calling your doctor or going to urgent care. This skill is for tracking, pattern-finding, and provider communication over time.
Does this work in ChatGPT or is it Claude only?
This is a Claude skill — it's built and optimized for Claude, and the bundled templates and letter logic are loaded through Claude's skill system. It won't run natively in ChatGPT.
Can't I just ask Claude to write a letter myself without buying this?
You could, but you'd need to prompt it to use correct PEM framing, avoid recommending graded exercise therapy (which is contraindicated for ME/CFS-overlap patients), structure the letter in a format PCPs scan quickly, and pull trends across multiple logged entries. This skill has that logic and the clinical letter template already built in. It's the difference between asking a general assistant and asking one that already knows your condition.
Install
After purchase you'll get a license key. Then:
$ npx skilltree-network login # paste your license key