Joshua 6:25

‘ And Joshua saved alive Rahab the prostitute, and her father's household, and all she had, and she dwelt in the midst of Israel even to this day, because she hid the messengers whom Joshua sent to spy out Jericho.'

Note the emphasis on ‘saved alive'. Thus was fulfilled the oath that they would live (see Joshua 2:13). They did not remain long outside the camp for they became members of the congregation of Israel. ‘Dwelt in the midst of Israel' can signify Canaanites dwelling among the Israelites in disobedience to God's command (Joshua 9:7; Joshua 13:13; Joshua 16:10), but that hardly applies here. It must signify acceptance. (Perhaps however her family were given the option to move on and out of the country - compare the man in Judges 1:26 - for they are not mentioned).

“Even to this day.” A clear indication that this was written while Rahab was alive. Alternatively we may read ‘she' as signifying the whole family, but in context that is an unnatural reading (‘she' means Rahab in both the other cases).