Today is Wednesday, and you need to deliver a release on Friday that is crucial for a key customer. The engineering manager reports a major bug. What do you do?

First, I would gather critical information: the bug's impact on functionality and platform stability, the estimated number of affected users, and the time required for a fix. Based on this, I'd assess the risk to the release. If the bug significantly impacts a core feature for a large user base, I would recommend delaying the release to maintain customer trust and brand integrity. Simultaneously, I would proactively communicate with the key customer, explaining the situation transparently and discussing revised timelines or potential workarounds.