Coding Prompts: 35 Templates for Developers

Find the bug in this {{language}} snippet. Explain the root cause and propose a minimal fix. Code:
{{code}}

Refactor this {{language}} function for readability. Add docstring, rename variables descriptively, and keep behavior identical. Code:
{{code}}

Write unit tests for this function in {{framework}}. Cover happy path, edge cases, and failure mode. Code:
{{code}}

Explain what this code does to a junior developer. Include input/output, side effects, and a 3-bullet summary. Code:
{{code}}

Review this REST/GraphQL API for consistency, naming, and error handling. Provide 5 concise recommendations. Spec:
{{spec}}

Suggest 3 performance improvements for this code (big-O, memory, queries). Explain trade-offs. Code:
{{code}}

Identify potential security issues (input validation, auth, secrets) in this code and give fixes. Code:
{{code}}

Draft a step-by-step migration plan from {{techA}} to {{techB}}, including rollback steps and smoke tests.