Put the following line in your common.js:

importScript('User:Kephir/gadgets/sagittarius.js'); // [[User:sagittarius]]

• Checks that the target page exists and is not a redirect already, and that the section name is valid
• Allows adding and changing (some) redirect tags, i.e. {{R from}}
• Auto-completes page and section names

Hit list edit

• A more complete list of redirect tags
• Signal relationships between redirect tags (conflicts, implies)
• More thorough support for {{this is a redirect}}
• Tag filtering

A modified version of Kephir's gadget updated February 2018 with more Rcats can be found at User:Wugapodes/Capricorn.