A veiled threat is not breaking any clauses. You should look up the number of times the Swiss (and others) have threatened to withdraw from so-and-so agreement with the EU. It isn't new. The EU has dozens of active arguments/negotiations with dozens of countries at any given time. And we already established that this is a bilateral treaty and without any guarantors (unlike the Good Friday Agreement) and hence could be ripped up at a moments notice by either party if they so chose. Just look at the number of times France has made threats in relation to the Trade and [non-]Cooperation Agreement (TCA). The exit clauses are merely there to offer a graceful means of pre-agreed exit strategies.

The EU however *literally drafted emergency powers legal text* to trigger the Article 16 (exit clause) of the N.I. Protocol during a dispute - a petty, tawdry and without any basis in reality dispute at that - regarding Covid-19 vaccines.

It is remarkable how the tone of your posts reveals how "on edge" you are about this. Even laden with typos such is the haste with which you type. It (Brexit - an event which concluded over two years ago) is clearly still a very raw nerve for you.