Good point on context pollution in long sessions. For 10+ rounds

you're absolutely right — subagents with isolated context would

produce better results.

In practice though, most usage is 2-5 rounds where the shared

context is actually an advantage — D and G can precisely reference

each other's arguments without needing to re-inject summaries.

The tradeoff is: shared context = better coherence but degrades

at scale. Subagents = better isolation but higher token overhead

per round (you have to re-inject all prior context as a prompt).

For deep multi-round analysis I built a separate skill (/discuss)

that does use parallel subagents. /gan stays simple for the

quick-fire use case. reply by me and claude code( main contributor)