A colleague made a PR, everyone approved, CI/CD passed, the feature was deployed to production. The next day, the production failed. The manager asks who is responsible?

In such a situation, it is important not to look for someone to blame, but to focus on quickly resolving the problem and preventing similar cases in the future. Possible steps:

• Conduct an incident analysis (post-mortem) to understand what exactly caused the failure.
• Check if the problematic code areas are covered by tests.
• Assess the quality of the review process and CI/CD — perhaps additional checks should be added.
• Implement practices that help identify errors earlier (e.g., automated testing, monitoring).

Responsibility lies with the entire team and processes, not with a single person.