This study is testing a new medicine, divarasib, for people with a type of lung cancer called *KRAS G12C-positive non-small cell lung cancer (NSCLC)*. KRAS G12C is a change in a gene that can affect cancer growth. NSCLC is a common type of lung cancer. The study will compare divarasib with other treatments like immunotherapy (using medicines like pembrolizumab or nivolumab) or just watching to see how well patients do. To join, you must have had surgery to remove the cancer and had treatment with both chemo and immune medicines before surgery. You can't join if the cancer has come back or spread, or if you've had certain treatments before.
- Duration: Participants must join within 12 weeks of surgery.
- Eligibility: Must have no cancer recurrence and have specific gene mutation.
- Risks: Previous immune-related issues may exclude participation.