Missing Imports

Code uses a symbol that isn't imported, or imports a symbol that doesn't exist in the source module.

The generated code uses a name that hasn't been brought into scope, or imports from a module that doesn't export the named symbol. A guaranteed runtime NameError / ReferenceError / ImportError.

Symptoms

• Code uses Foo but Foo is never imported.
• from mod import X where mod exists but does not export X.
• import { x } from "pkg" with no matching named export.
• Static analysis flags unused-import alongside undefined-name — common when the agent copy-pastes between files.

What to do

• For every symbol used in the diff, confirm there is a corresponding import in the same file or that the symbol is defined locally.
• For every new import, verify the target module actually exports that name. Open the module if needed.
• Don't guess at package layout. When unsure, read the package's package.json exports, __init__.py, or equivalent.
• Run the static checker (tsc, mypy, pyright, etc.) after every non-trivial change. Missing imports almost always surface there.
• Remove unused imports in the same change so the surface stays honest — stale imports mask real failures.