The Destiny AI is the automated system which controls and maintains the Ancient deep-space exploration vessel Destiny. It allows the ship to adapt to any unforeseen circumstances in its journey across the universe.
The AI's primary function is to govern the ship's autopilot, making course corrections, refueling stops, and stopping at Stargate-seeded planets as necessary. It can plot complex slingshot maneuvers around gravitation bodies, such as gas giants and stars, as well as divert power as needed to ensure the ship remains on-course.
The AI also has the ability to analyze the crew, diverting the ship to locations which will provide needed resources for the crew to survive. However, their survival is considered secondary to the mission, so the AI will only allow as much time as it deems necessary for the crew to complete their current task.
In addition to basic survival, the AI appears to be capable of interpreting and responding to the emotional states of its crew. It can use a ship-wide neural link to manipulate the minds of the crew, projecting scenarios into their minds for various purposes.
Destiny's computer systems also possess the ability to store and run an unknown number of downloaded human minds as programs within it - allowing them to interface with its systems and read its database. Such programs are essentially artificial intelligences in themselves. It is unknown what level of system access they truly have, however - the database requires the master code, but stored minds do not seem to have the ability to access other code-restricted systems such as navigation. They are able to appear to the crew through the same ship-wide neural link used by the avatars of the AI itself. Unlike the AI, however, they do not appear able to use the neural link to manipulate other aspects of the crew's minds, such as reading their thoughts, placing them in virtual simulations or inputting senses of touch, taste or smell. This is most likely a security restriction, but could be due to other factors.
Throughout Destiny's journey, the AI has kept the ship on-course, compensating for deterioration over millions of years. After the arrival of the crew, it began studying them and stopping at appropriate planets for them to retrieve supplies.
When Dr. Nicholas Rush discovered the bridge, he began seeing hallucinations of Gloria Rush and Jeremy Franklin, which he believed were manifestations of the ship, though he also considered that he had simply gone insane and was imagining them. The hallucination of Gloria did nothing but question his decisions and try to get him to take care of himself, while the Franklin hallucination served to point out the things which Rush had missed, though usually in an ambiguous manner. Both have stressed the importance of having a full crew run the ship. Rush later deactivated the neural interface, but revealed that the Franklin hallucination is Franklin's consciousness downloaded by the ship. (SGU: "Aftermath", "Pathogen", "Hope")
The AI later used the ship's neural link to affect Colonel Everett Young's dreams, projecting a scenario into his mind of a catastrophic attack on Destiny by the Nakai. In each iteration of the scenario, Young's actions led to the destruction or capture of the ship. After the third scenario, which drove Young to sequester himself in his quarters, the ship came to a dead stop, refusing to move. Rush and Camile Wray suggested that it was waiting for someone to take command. Ultimately Rush overrode the program and got the ship moving again, which Franklin thought was a bad idea. (SGU: "Trial and Error")
The consciousnesses of Dr. Amanda Perry and Ginn, left over in the communication stones, were downloaded from Chloe Armstrong's body into the ship's database using the Destiny interface chair. Perry used her access to the medical database to help Lt. Tamara Johansen complete Dr. Dale Volker's kidney transplant, whilst Ginn appeared to Eli. (SGU: "Hope")