I like a good conspiracy and this one fits like a glove.
France has a long history of employing the French Foreign Legion (an early version of today's private military institutions such as the infamous Blackwater) in undeclared conflicts. That is statesman jargon for invading without declaring a war. The French Foreign Legion consists entirely of foreigners, normally seeking a new identity as a French citizen.
The Legion could, in the eyes of the French, be used covertly and should they be discovered their actions can be dismissed by the French government since they are not citizens.
Infiltrating a spy into Gaddafi's camp is rather consistent with the French (and the American and the British) way of handling foreign policy. Libya produces 2 percent of the world's oil. France needs access to cheap oil, having been cut out of the other Middle Eastern producing nations by first the British and then the United States.
France's Sarkozy is implicated in the article for his overtures to Gaddafi back in 2008. Sarkozy then took the lead in the air campaign over Libya 3 years later. It insured France would be at the table when the powers that be divid-up Libya's oil production.