AI CODE DETECTOR GUIDE
Why does an AI code detector flag defensive error messages?
Is My Code AI flags certain error-throwing lines because they match a configured text pattern: a supported throw or raise expression together with words such as “required” or “invalid.” The match does not establish that the validation is wrong or that AI wrote the code.
Is My Code AI analyzes submitted code locally in your browser.
The rule in a JavaScript example
This line uses a familiar input guard:
if (!email) throw new Error("Email is required");Run by itself against the site's current heuristic, the line matches Template-style defensive error text. The report shows one matched rule, one flagged line, and a matched weight of 6 out of the configured maximum of 76. The weight describes this rule's contribution to the heuristic score; it is not an AI-authorship percentage.
The rule recognizes particular error expressions and wording on a line. It does not test whether email is correctly validated, whether the branch is reachable, or whether the message is appropriate for the product.
Similar messages do not always match
When tested alone, throw new Error("Request failed"); produced no configured match. The error expression was present, but the line lacked one of the wording cues checked by this rule. That result does not certify the line as human-written or as correct code.
The current rule can also match a Python line such as raise ValueError("Email is invalid"). Tested by itself, that example matched the same rule and flagged its line. A project can use either message for a routine engineering reason.
What to review when this line is flagged
Check what input reaches the guard and what the caller does with the error. Compare the wording with nearby validation messages and the project's conventions. If the message is clear and the behavior is intentional, there may be nothing to change. If it is misleading, describe the actual code issue rather than treating the detector flag as the issue.
A snippet omits surrounding behavior, so a reviewer may need the full function or relevant tests to answer these questions. The detector reports code-style matches and associated line numbers; it does not prove authorship or replace review of correctness.
Check your own code locally
Open the AI code detector to inspect matched rules and flagged lines. It supports Python, JavaScript, Java, C++, PHP, and C#. Submitted code is not uploaded by this static site. For more detail, see how to read flagged lines and what the score means.