BracketBot checks all edits to see if all open brackets ({[< have matching close brackets >]}), and informs the editor that their edit may have broken some markup if there is a mismatch. In order to reduce false positives, it will not message the editor if one of these conditions is met:

• It is not in the main namespace.
• It is fixed within ten minutes.
• There are no unmatched brackets for the whole article.
• It finds the unorthodox numbering system of 1), 2), … or a), b), …
• The edit summary contains "rv", "revert" or "!nobot!".
• The edit hash matches a hash in the previous 50 edits (the edit was a revert).
• The user has opted out of BracketBot messages.

If it has to create a talk page for the user, it will {{welcome}} them.

• Opt out – the bot will ignore your edits.
  • Add [[Category:Wikipedians who opt out of BracketBot messages]] to your talk page or your user page.
  • OR Add {{NoBracketBot}} to your user page or your user talk page.

• Opt in – the bot will resume watching your edits.
  • Remove [[Category:Wikipedians who opt out of BracketBot messages]] from your user page.
  • OR Remove {{NoBracketBot}} from your user page or your user talk page.

• Show opt out list – view a list of user pages of users whom the bot will ignore.
  • List those who opted out by category.
  • List those who opted out by template.

To explicitly disable notification on a single specific edit, place "!nobot!" anywhere in the edit summary.

Add {{NoBracketBot}} <!-- This page contains deliberate unpaired brackets. BracketBot should ignore. --> to the page.

• Opt in - the bot will notify you under a daily header.

  Add {{DailyBracketBot}} to your user page or your talk page.

• Opt out - the bot will notify you under a monthly header.

  Remove {{DailyBracketBot}} from your user page or your talk page.

• Show opt out list – view a list of user pages of users whom the bot will notify under a daily header.
  • List those who opted in.

The current template used is {{User:BracketBot/inform}}.

Currently, the live feed can be viewed at ##930913-ub ^connect. If it is not running, ping a930913.