The AI Agent Build Kit

10 patterns for the part nobody demos: what happens when the tool returns nothing, the model loops, the context runs out, or the agent does something irreversible. Each one names a specific failure, shows code that runs, lists how it still breaks, gives you a test — and says when not to use it.

If you want projects to build rather than the engineering underneath them, the Project Vault is the other one, and three of its specifications are free too.