Are Prodosy Server hooks reliable for any critical flow implementation

I am building certain flows (business critical) based on prosody hooks. How does prosody guarantee every registered hooks will be invoked.

Can we rely on the hooks for implementation.

It is an open source project, you can always verify it yourself Obtaining the source – Prosody IM or ask their community.
But not sure you will get a better answer than this.
What are your concerns?
We haven’t seen something unreliable.
If we see problems we have being reporting them and with the help of the prosody community we have been fixing them. In the past those were mostly performance optimizations, you can check previous versions release notes to have an idea.