https://www.youtube.com/watch?v=ps-w7cBz9Ew
Every mistake is a chance to make your Claude Code setup smarter—if you capture the lesson right. The Lessons Learned skill runs a 7-phase retrospective that doesn’t just analyze what went wrong, it implements the fix before you move on. No more “be more careful next time.”
What it does:
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Automatic 5 Whys root cause analysis
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Identifies contributing factors
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Implements fixes directly (not just recommendations)
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Logs everything to your vault for accountability
In this demo, I run it against issues from my social media manager build and watch it:
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Trace the webhook failure
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Identify the newline handling bug
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Edit the agent file with the fix
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Document the lessons for future sessions
Get the skill:
Every mistake makes the system stronger, not just the memory longer.