it's well known that recipes cannot be copyrighted. But recipes still are protected intellectual property by trade secret law if they are treated as a secret by the holder of the recipe.
Claude code itself is a trade secret, and it is not open source, so its own copyrightability is moot till you get your hands on a copy of it with clean hands.
Recipes cannot be copyrighted because they are not expressions of human creativity. Software written by AIs are also not expressions of human creativity, so the balance is tilted in favor of AI generated copy not being copyrightable.
The Supreme Court or legislation could change this, and I'd guess there will be a movement to go in that direction, but till something like that succeeded it's not so.
Claude code itself is a trade secret, and it is not open source, so its own copyrightability is moot till you get your hands on a copy of it with clean hands.
Recipes cannot be copyrighted because they are not expressions of human creativity. Software written by AIs are also not expressions of human creativity, so the balance is tilted in favor of AI generated copy not being copyrightable.
The Supreme Court or legislation could change this, and I'd guess there will be a movement to go in that direction, but till something like that succeeded it's not so.