AI Coding Tip 029 - Assign a Different Model to Each Pipeline Stage
Different stages need different brains.
TL;DR: Assign a different model to each pipeline stage since none excels at planning, coding, reviewing, and testing alike.
Common Mistake ❌
You open one chat with your favorite model and ask it to plan, write, review, and test the same feature end to end.
You treat model loyalty like a virtue, so the same blind spots follow the code from the first line to the last commit.
The defects it can't see when it writes are the same defects it can't see when it reviews.
Problems Addressed 😔
- The reviewer inherits the coder's blind spots, so it misses the exact defects the same model would write.
- You lose the benefit of a second opinion, since the analyst and the executor are the same mind.
- One vendor's outage, rate limit, or price hike stalls your entire pipeline at once.
- Your codebase drifts toward one...
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