Neptune: Direct3D Virtualization for QEMU

"Was it faster than doing it solo? Probably yes, on the order of 3–5× for the work captured in these transcripts, with the speedup concentrated in:

Mass refactor / rename work (10× or more — Claude can rename a function and update 200 call sites in minutes). Code review breadth (subagent fan-out reads more files per hour than any human can). Performance analysis writeups (the “table of metrics + paragraph of prose” format is something Claude is genuinely good at and is tedious for humans)."