Opus vs Qwen given same bug, same repo, yet one agent finished 7x faster

I know there are skills and system prompts that can make your coding partner a but more aware and critical about working on gh issues, but I think it's not just about good planning and reading, but more about multi-step logic and pit stops like "yes the issue is solved, but are there any ripple effects that are non obvious, not mentioned in the original issue, and that might require follow up issues if we don't solve them now"? or "ok it's done, but does it pass all tests, scripts, lints, etc.?" or "does it contain any weird characters or spaces that could be flagged as potential prompt injection attempts or even just unecessary characters with non clarified function"?. Basically, I think, solving any gh issue should happen in a single prompt. No. I am not saying no HITL or no reviewers, but prompting 10 times, just to get basic docs aligned with the changes is absolute nonsense in 2026. What are some top skills, frameworks or skillware modules that touch this? Thanks ❤️