Daily Prompt Sprint
Free every dayOne prompt challenge.
Every day. Free.
A focused 10–15 minute prompt engineering challenge designed to build a real skill. New sprint drops every day. Premium members unlock the full archive.
Today's sprint ·
The challenge
What you're practicing
Write your prompt
Hint
Nice work — your prompt is submitted
AI critique and a side-by-side comparison with a stronger version are available to Premium members. Upgrade to see exactly what to improve and why.
Unlock AI feedback →Free starter — a weak version to improve
This is the weak version. Your job: rewrite it to get dramatically better output.
Sprint archive
Every past sprint,
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The archive grows every day. Premium members get instant access to every sprint ever published — as a searchable, categorized library.
Make AI argue both sides of a decision before recommending
Decision-making · 12 min · Beginner
Write a prompt that produces structured JSON output every time
Structured outputs · 10 min · Intermediate
Use chain-of-thought to solve a problem AI usually gets wrong
Reasoning · 20 min · Intermediate
Write a reusable email rewrite prompt that works for any tone
Writing · 12 min · Beginner
Build a prompt that pressure-tests any plan or idea
Critical thinking · 15 min · Intermediate
Set up Claude to know your job — a permanent context prompt
Setup · 10 min · Beginner
Write a meeting summary prompt that actually captures decisions
Growing every day
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Every sprint ever published, organized by skill, difficulty, and topic. New ones added daily. AI feedback on every submission.
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