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Turn your vibe code into a wiki you can understand, review and improve.

Pen Wiki for Claude Code

Connects your own Claude Code with your Markdown files. Point your pen, comment, and it changes the document or the code.

Install in VS Code Free forever

Pen Wiki for Teams

All of Pen Wiki for Claude Code, on the web. Plus reviews against your guides, and your team's comments in your editor.

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Pen Wiki in VS Code on a laptop: a sentence selected, a comment typed on it, and the kinds of answer to choose from
Adam, founder of Pen Wiki
I vibe-coded my apps.
But I wanted to understand them more.
Adam, Founder of Pen Wiki

One wiki. Two places.
Your Claude Code.

How it works, on one example: from code you didn't write to a fix you understand.

1
Pen Wiki for Claude Code

See what Claude built

Claude writes Markdown files from your code that explain how it works. Point at anything you don't get and ask why — like the cache in front of your database.

2
Pen Wiki for Teams

Get a second opinion

Share the page. Your teammate comments in the browser, nothing to install: “Is the cache still needed?”

3
Back in VS Code

Fix it together

Their comment lands in your editor. Claude removes the cache from the code and updates the page. You check the change.

Your rules, checked.

One step further: write down how your project should work. Claude checks the code against it, whenever you ask.

security-guide.md
Write your rules

Plain Markdown, in your own words: “Every endpoint checks the session.” “No secrets in the code.”

security-review.md
Run the guide

Claude reads the code and writes a review page: what passes, what does not, and where.

all checks pass
Fix and run again

Comment on a finding and Claude fixes the code. Run the guide again to see it pass.