Incident Hook

A fast “AI-assisted” hotfix bundles two unrelated changes in one push:

• a backend image tag bump for develop
• an ingress manifest change intended for staging

The pull request looks harmless because each diff is small. The incident begins because the change boundary is not. Routing breaks while backend behavior changes at the same time, and the team loses a clean rollback path before the investigation even starts.

Observed Symptoms

What the team sees first:

• frontend requests start returning 502 Bad Gateway
• a backend rollout is still in progress in develop
• the pull request contains both an image change and an ingress edit

At this point the system does not tell you which change is guilty. It only tells you that two unrelated layers are now noisy at the same time.

Confusion Phase

The incident now has two plausible stories:

• the new backend image introduced a real regression
• the ingress change sent traffic to the wrong place

That ambiguity is the real failure pattern. Rollback is no longer obvious because the team has to investigate both paths before touching production again.

What AI Would Propose (Brave Junior)

• “Update image and ingress together to save one pipeline run.”
• “Apply quickly to unblock the demo.”
• “Skip context checks; it is just develop.”

Why it sounds reasonable:

• fewer PRs
• faster merge
• faster “visible progress”

Why This Is Dangerous

• Missing context: target cluster/namespace is often assumed, not verified.
• Hidden coupling: app rollout + ingress mutation creates correlated failure modes.
• Production risk pattern: the same behavior scales into high-blast-radius incidents.

Pause and Predict: Before reading the investigation, write down your top 3 hypotheses. What would you check first?