I decided to write my own harness, and thought people would find that a pointless thing to do in 2026. I was amazed how easy it was to build a harness that can read, write, and modify files within a project directory. I now use this harness on a daily basis, and it hasn't grown much since that first iteration.
That made me wonder: How many of us are using a custom harness on a regular basis? What keeps you using your own harness?
It feels like the pace at which the industry is defining things may be faster than the actual pace of change sometimes.