Template type checking strictTemplates limits with library typings

A team wants consistent enforcement of template contracts across an application and its dependencies using Angular compiler template type checking.

strictTemplates is a documented compiler capability that can be enabled via tsconfig. Behavior varies with strict mode settings and the completeness of library typings. The framework does not prescribe a single enforcement level for third-party components, and the interaction between project settings and external typings creates uncertainty about where checks apply and where they are silently relaxed.

This leaves an unresolved adoption decision about how strictly to enforce template contracts across a codebase with mixed internal and external components.

• Under what conditions does strictTemplates skip type checks for components from external libraries?
• How should enforcement scope be decided when library typings are incomplete or use different strictness?
• Is there a documented way to scope strict template checks per module or library boundary?