In the Pathfinder game I run, a player with a level 1 PC wants to change his class from fighter to rogue.
The party made the acquaintance of a mid-level thief and during downtime the character wants to train with the thief. I feel like the training should give him the skills he needs to change classes, but I don't know how to handle the rebuilding.
Initially I thought to have him reroll everything and just keep his current XP, but I didn't like the idea of him suddenly changing his ability scores which I believe, realistically, should take awhile to do. I mean, you can't suddenly become really dexterous and charismatic in a month or two.
My other thought was to have him keep his ability scores and change his 1st level class to rogue so he can get the right skills, but I think that would potentially clip his wings since his base stats are more geared towards being in the front line than being sneaky.
Are there rules that cover this?