Penalties, safety screens & "shadowbans"

What the safety and visibility code actually does — and what it provably does not.

• Is shadowbanning real on X?
• What is PTOS enforcement in the X algorithm?
• How does X's spam classifier work?
• What is the "post safety screen" in the X code?
• Do blocks and mutes hurt my ranking?
• How do I audit my account for suppression signals?