jsmanifest

Most TypeScript composition failures stem from misunderstanding intersection types. Learn when they compose cleanly, when they produce never, and how to avoid the silent lies that break production code.

Most runtime property access errors stem from index signatures pretending to guarantee properties they don't. This flag exposes the lie and forces honest API contracts.

The verbatimModuleSyntax flag eliminates elision guessing, but it breaks mixed import statements, re-exports, and side-effect modules in production codebases. Here's what actually fails and how to fix it.