A hallucinated API or package is a name that the model invents even though it does not exist. It may suggest a believable method, configuration option, or dependency because the name fits common patterns. The generated code can appear correct until it is compiled or run.
Use the compiler, type checker, and language server as the first check. For dynamic languages, run focused tests immediately. Confirm unfamiliar methods in the official documentation for the version your project uses. Before installing a suggested package, inspect its official registry page, repository, maintainers, release history, and usage. Attackers sometimes register names that models often invent. Require human approval for new dependencies, especially when an agent can run package-install commands.
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