Back and
Ashburn: thanks for raising the questions about skills. One of the rules mechanics I'm pretty pleased with is that
skills can increase the player's
stats – which is not something I've seen in other RPG rule systems – so that (for example) levelling up in the
Kickboxing skill can increase your
Strength and (physical)
Daring, and levelling up
Cosplay can increase your
Creativity and (social)
Confidence.
So even skills that are
unused aren't necessarily
useless, because they indirectly affect your agent's overall capabilities. (In a way, that reflects something that I've read about actual spy recruitment and training: they seek generalists who can quickly improvise solutions to problems they've never encountered before.) If your choice of how to break into a building is between climbing up a drainpipe to an open third-floor window or bluffing your way past the security desk, your decision might be influenced by whether your agent was a kickboxer or a cosplayer at university (even though she won't actually make a Cosplay or a Kickboxing skill roll in this scene).
That said: the more skills are used directly in the story, the better. I hope that the presence of the skills will inspire writers to factor them in to their scenes and side quests.
For instance: imagine you're writing a foot chase through a crowded night market. Lots of
Running rolls for the agent and the thugs on her tail, obviously, but maybe you suddenly remember we have a
Ride Bicycle skill, too! You can now insert a decision point where the agent can choose to steal someone's bike to aid her escape, and now introduce some
Cycling skill rolls to weave through the crowd at high speed. This is suddenly a much more interesting scene!
Note how this cool little scene might have been hard to invent without the presence of the
Ride Bicycle skill, and would certainly have been hard to implement in a way that felt exciting or fair without the skill. (Either deciding to steal the bike would succeed automatically – not exciting – or it would succeed or fail based on some kind of arbitrary random factor – not fair.)