I saw this project on YouTube under Arbor Pergola Swing. It did not mention any specific detailed plans or cut list but it was enough to get me started. I began with (2) 10' 6" x 6" post. buried each 24" and cemented. I cut the post tops at 83" from ground line. The rafter consist of (2) 10' 2"x 6". I used the leftovers of the 6" x 6" post tops in the middle of my rafters to hang the swing from with 1/2 " eye bolt. Then I used (9) 2" x 2 " x 8' and cut each at 36" to finish off the top and (2) 2x6x8 for the 4 rafter supports. I drew out the designs of the rafters and top ends free hand and at made a template for the cuts with s jigsaw.
The entire cost including hardware minus the swing was $170. My wife had purchased the swing last Fall at a clearance for $40 brand new.