Prompt · Developer Tools

Edge Case Enumerator

Enumerates edge cases and failure modes for a function before you ship it.

Have ready: Paste the function and describe its expected inputs

Fill in · 4 fields

PASTE THE FUNCTIONDESCRIBE NORMAL INPUTSe.g. PAYMENTS / FILE UPLOADS / SCHEDULING, OR "GENERAL"DOMAIN-SPECIFIC CASES

Your prompt

Enumerate the edge cases for this function. Be exhaustive and a little paranoid.

Function:
[PASTE THE FUNCTION]
Expected inputs: [DESCRIBE NORMAL INPUTS]
Domain: [e.g. PAYMENTS / FILE UPLOADS / SCHEDULING, OR "GENERAL"]

Deliver a table: | Edge case | Input example | Expected behavior | What the code actually does (trace it) | Risk |

Cover: empty/null/undefined, zero, negatives, max int, floats, unicode/emoji, whitespace-only strings, timezone boundaries, DST transitions, leap years, concurrent calls, extremely large inputs, malformed input, and [DOMAIN-SPECIFIC CASES].

End with the top 3 cases most likely to cause a production incident, and the guard clause or test for each.

Paste it into Muse or any assistant. Blank fields stay as [brackets].

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