Use the 'prv' prefix for private class members and ensure they're explicitly declared with the 'private' access modifier. This maintains consistency with established team conventions and improves code readability by clearly indicating variable scope. ```typescript export class MyComponent { // Correct: prefix matches access modifier private prvUserData: UserData; // Incorrect: prefix doesn't match access modifier public prvConfig: Config; // Incorrect: no prefix but is private private userData: UserData; } ``` When refactoring existing code, update variable declarations to follow this pattern consistently. For observable patterns, public-facing properties should have clean names without implementation details while their corresponding subjects should use the 'prv' prefix: ```typescript export class MyService { // Private subjects private prvDataSubject = new ReplaySubject(1); // Public observable (clean naming) data = this.prvDataSubject.asObservable(); } ```