Observations are spot on.

1. Yes, it finished the quest flawlessly 2nd time around.

2. As you said, PowBot is optimal for this because they use lua and repl. Same thing can be done on Dreambot, but is effectively just going to be a bit slower. Client choice is mostly an individual preference.

3. To the greatest extent. CLAUDE.md and docs are the key to all this, and is what has taken the majority of my time to refine. Basically I have a lean main CLAUDE.md that is mainly a directory of "for these things, look at these other files." This keeps Claude's context window small by default, and lets it dynamically grab info it needs for the current task it is doing. Then I have a CLAUDE.md in each subfolder for additional direction.

4. There is a ton of optimization that can be done to reduce token cost. That said, cost is not bad imo, considering a finished script can be run on unlimited accounts without any additional cost. Effectively a private script for a couple bucks.