On the Agent design page, Buildable now answers a fast-moving question: what exists today that makes this actually buildable?
It's a live web search for the specific, named building blocks a developer would use (a particular model, API, SDK, or platform, with its version or release) and what each one newly makes possible for your opportunity.
Specific and sourced
These aren't vague buckets like "AI models" or "vector databases". Each item names the actual product (say, a specific model's function-calling, or a named search API) and links to where it came from. Anything generic, or anything we can't trace back to a real result, is dropped, so what's left is concrete and checkable.
Because the landscape shifts every month, this is looked up fresh each time rather than baked in. Treat it as a starting point to verify, not the final word.