Stop re-explaining your Long COVID at every appointment.

Log crashes in 60 seconds, get a weekly summary letter your doctor will actually read — PEM events flagged, triggers named, and quality-of-life impact spelled out in clinical language.

$9.99

Works in Claude (Pro/Max/Team) or ChatGPT (Plus/Team) · paid AI plan required

Both Claude + ChatGPT packages included — you can't pick the wrong one.

Updated May 26, 2026

Included

01Log a crash in under 60 seconds — type like you're texting a friend, the skill structures it into a clean diary entry.

02PEM events are auto-flagged with the preceding trigger (shower, Zoom call, 10-min walk) and recovery time.

03Generates a one-page provider letter your PCP can scan in 90 seconds — trends, triggers, QoL impact, and your questions.

04Uses the clinical vocabulary that gets taken seriously in a chart: post-exertional malaise, orthostatic intolerance, unrefreshing sleep.

05Tracks meds, supplements, and sleep alongside symptoms so weekly patterns surface — not just isolated bad days.

06Bundles a PEM explainer you can paste into your notes if your provider still thinks graded exercise therapy is the answer.

What it does

Most symptom trackers were built for headaches and hydration. This is a Long COVID symptom diary and provider letter generator built for the actual job: crashes that hit 36 hours after the activity, brain fog that makes form-filling impossible, and a 15-minute appointment where you try to remember what happened two weeks ago. DIARY MODE takes a quick check-in — energy, fog, pain, sleep, what you did — and structures it into a timestamped entry with PEM events flagged automatically when the pattern fits. LETTER MODE rolls a week of entries into a one-page PCP letter using the bundled provider-letter template, in the clinical language that lands. It covers symptom trends, crash events with triggers and recovery time, current meds, and your verbatim questions for the visit — ready to paste into a portal or hand over at the desk. For patients new to PEM, the bundled pem-education.md gives you the language you need to describe post-exertional malaise to a skeptical GP without minimizing or catastrophizing.

Frequently asked

How do I track Long COVID symptoms and PEM crashes without spending an hour a day?

The daily diary is one short message — answer 6 quick questions in shorthand and you're done. The skill detects PEM patterns (energy drops, crash language, post-activity worsening) and flags them automatically with the trigger noted.

What does a good Long COVID provider letter look like?

Under 350 words, first person, clinical vocabulary, organized into five sections: symptom trends, PEM events table (date, trigger, severity, recovery), quality-of-life impact in concrete ADL terms, your verbatim questions, and current meds. That's exactly what this generates.

Will it tell me what treatments to try, like LDN or H1 blockers?

No — and that's on purpose. Treatment recommendations come from your specialist. The skill will add medication questions to your provider letter verbatim so you can actually ask them in the appointment instead of forgetting.

I have brain fog. Can I really fill this out on a bad day?

Yes. There's no form — just type a fragment, voice-transcribe, or paste what you'd text a friend. The skill parses any format and infers missing scores rather than making you redo anything.

Can I just write my own ChatGPT prompt for this?

You could try. You'd need to encode PEM detection rules, the provider letter template, Bell Scale mapping, clinical vocabulary, and emergency escalation logic. This has all of that built in and tested against real Long COVID scenarios.

Install — no Terminal required

After checkout you land on a page with a one-click download and a pre-built install prompt. Pick the AI you already pay for — both packages are included, so you can't pick wrong.

What you'll see the second your payment clears

Your license key

ST-XXXX-XXXX-XXXX · permanent

Pre-built install prompt⧉ Copy

ChatGPT package (ZIP)⬇ Download

No setup work before you buy — copy, paste, done.

Have Claude Pro, Max, or Team?

Copy the prompt, paste into Claude

Copy the pre-built install prompt from the success page, paste it into any Claude Code chat, and Claude installs the skill itself — about 10 seconds. Using the app instead? Drop the downloaded folder into a Claude Project's knowledge and ask Claude to use it.

Have ChatGPT Plus or Team?

Build a Custom GPT — ~2 minutes

Click Download ChatGPT package (included with every purchase).
Unzip it — inside is a SETUP.md and a knowledge/ folder.
Go to chatgpt.com → your profile → My GPTs → Create a GPT → Configure.
Paste the Name, Description, and Instructions from SETUP.md into the matching fields.
Under Knowledge, upload every file in the knowledge/ folder.
Click Create/Save, open your GPT, and describe your task in plain English.

A paid plan on either platform is required — Claude (Pro, Max, or Team) or ChatGPT (Plus or Team). Comfortable with Terminal? A one-line npx skilltree-network install path is available too.

Stop re-explaining your Long COVID at every appointment.

What it does

Frequently asked

Install — no Terminal required

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