Observed arrival · 2026-11-15
Whetstone turns AI-assisted coding into practice
Whetstone is a locally run coding-practice tool where a coding agent creates work-specific exercises, graded by tests.
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$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
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ƒJS
- For
- Software engineers practicing skills their coding agents handle
- Worth noticing
- Solved ideas return after 3 days, 3 weeks, 3 months, 6 months, and a year.
Field notes
The page walks through a session in which an agent prepares a question, a hidden test fails, and the agent asks about the relevant line before the fix passes. Listed exercises include reviewing a payout job, testing exponential backoff, and designing short links for a campaign spanning TV, email, SMS, and printed QR codes. The site also describes a guard hook intended to protect progress data and solo-question folders from agent edits.
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
◎NicheUnusually specific use
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