This was a solid threshold session despite low sleep: 7.8 km in about 45 minutes, normal legs, and a workout that felt correct and challenging.
The main threshold block was faster than a conservative controlled effort, landing close to 5:02/km. Because it was short and heart rate stayed manageable, this is a positive quality signal rather than a concern.
The weekend should now be balanced carefully: Saturday should be only a short easy activation, and Sunday's half-marathon workout should be treated as a controlled rehearsal, not the real August 23 race effort.
Takeaway. Do not move the August 23 race effort to August 9. Use August 9 as a controlled rehearsal, keep August 23 as the real half-marathon test, and preserve the marathon-specific long runs that follow.
Next step. W10D6 Easy Run. Very short easy activation before the controlled half-marathon rehearsal. Keep it light and finish fresher than you started.