Codex GPT 5.5 Reliability Has Become a Serious Trust Issue for Daily Project Work

I am writing this not as an outside observer, but as a daily Codex user whose real project is being affected by this workflow. What I am experiencing is very clear: Codex keeps repeating the same mistakes in my project, even after I have explicitly emphasized the same constraints more than 20 times. It fails to respect project-specific rules, loses track of context, and makes decisions that actively put the structure of my project at risk. I cannot know whether this is caused by a model regression, a Codex pipeline issue, routing / deployment changes, long context failure, or something else. But from the user side, the result is the same: trust loss. The cost of using the model has increased, yet the reliability I experience in real project work has not improved accordingly. In fact, my experience has become more unstable and more frustrating over time. I am not claiming to know exactly what is happening internally. I am telling you how it feels as a paying customer who works with Codex every day: the product is becoming harder to trust, harder to rely on, and more expensive to use at the same time. That combination is extremely frustrating.