One of the most important principles behind the HST program, or any other good program, is progressive overload. That will be hard to accomplish with calisthenic work but lets give it a try.
Perhaps to do this we could choose several movements and order them by level of difficulty. Also we could take some of the traditional movements and do variations to make them more difficult. We can layout the movements in two week progressions starting with the easier work and progressing to the more difficult towards the end.
So you will want to do each movement to determine your max reps first. With that number in mind we can then subtract reps for each session to form a starting rep count to progress from. Example: You can do 50 push-ups. With six workouts over two weeks we could layout the number of reps for each workout as 25, 30, 35, 40, 45, 50.
Some of these will take a bit of balance and athletics to do. If you find one too hard to do simply try to extend one of the earlier movements again through the mesocycle instead and practice the movement for the next run through in the future.
Week 1 - 2:
Incline push-up (Feet down, head up)
Bench dips
Underhand pull-up
Two hand hang (overhand grip)
Alternating toe touches
Deep knee bend
Horse stand
Lunge
Two legged calf raise
Jumping jack
Shoulder circles (windmills)
Bicep isometric squeeze (5 seconds per rep)
Crunches
Knee raise
Week 3 - 4:
Push up (Level)
Dips
Diamond push-up
Overhand pull-up
One handed hang (Underhand grip)
Goodmorning
Jumping squat
Bootstraps
Step-up
Two legged calf raise (Raise up with two legs, lower by one leg alternating)
Shoulder press-up
Traps isometric squeeze (10 seconds per rep)
Bicep isometric squeeze (10 seconds per rep)
V-up crunch
Knee to chest crunch
Week 5 - 8:
Decline push-up (Head down, feet up)
Hindu press up
One handed push-up
Underhand pull-up (Pull up with two arms, lower with one arm alternating)
One handed hang (Overhand grip)
Hyper-extension (Isometric squeeze for 5 seconds)
Pistol squat
Burpees
Platform jump
One legged calf raise
Handstand press-up
Farmers walk with wheel barrow or dumbell
Bicep/tricep plyometrics (Resist the curl with the tricep of the other arm)
Jack knife crunch
Knee to elbow crunch