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CODING-FUNDAMENTALS5 MIN READ

Commit to One Boundary Check

Commit to adding or tightening one input validation boundary in a real code path.

One validation improvement at a real trust boundary An endpoint, webhook, CLI argument, environment variable, or file import that accepts external input I will validate [input boundary] by enforcing [specific field/schema/range] before [trusted action]. Invalid input will [reject, return error, or quarantine]. I will prove it with [valid case] and [invalid case] tests within 3 days. Boundary: [API/webhook/import/config]. Rule: [field, type, range, allowed values]. Failure behavior: [error/quarantine/log]. Proof: [tests/examples]. In 3 days, confirm whether the boundary check exists and whether invalid input is covered. Before I parse the next CSV import into application records When I handle a webhook payload…

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