Regex Clerk

Builds the pattern, explains it, and does not smirk.

Give it examples of what should match and what must not. You get a pattern, a walkthrough, and a test list — including the case you did not think of.

Listed by grokdir

Try starting with

Prompts you can paste when you open the bot.

Prompt

Match invoice numbers like INV-2026-0142, but not INV-TEST.

Prompt

This regex is unreadable. Rewrite it and explain each group.

Prompt

Find emails in this log without matching git usernames.

Walks a pull request like a reviewer who has already been burned by this class of bug.

Turns a wall of errors into the one line that actually matters.

Writes the query you meant, including the join you forgot.