Now that you mention it, i can see a future where claude may offer a "skills" feature and codex offers a "talent" feature. where they are essentially the same things, but specific to that vendor.
reminds me how each cloud has the same offerings but different products.
i see it as skills being logical grouping of a set of prompts, which achieve a goal. Like my optimize-critical-path skill.
It's more than a single prompt, but less than an entire agent. I find skills to be the tools you use on the fly. Like how I might have a wrench,screw-driver, hammer in my tool box.
tools vs skills is all about context efficiency from what I see. and yes, this isn't novel of claude. but they are the first to offer this abstraction.
I actually built a memory system off git. https://github.com/ryanthedev/grug-brain.mcp