Retention agent: fix three bugs in a discount offer engine
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SierraCodingA coding interview question asked in Sierra's debugging round. It tests debugging, python and agents.
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Where it's asked
- Sierra · Debugging60 min · A small repo that implements one feature end to end (a Python retention agent in a 2026 report, a TypeScript and React app in earlier ones) with several customer-reported bugs: reproduce each, find the root cause, fix it and prove the flow works end to end · Earlier reports: no AI coding tools. Newer loops can include an AI coding agent whose repo instructions (AGENTS.md) tell it not to find the bugs for you: it acts only once you point it at the direction and the code
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