<!-- TIER:1 -- Managing Stacks A stack is a pointer to your own compute environment where Celigo runs extension code -- the script hooks and connector wrappers that would otherwise run on Celigo's hosted JavaScript runtime. A stack holds the address and credentials of that environment, not the logic. At runtime, when a hook or wrapper is configured to use a stack, Celigo dispatches that function's execution to the stack instead of running it on its own managed runtime. Concerns when managing stacks: - Necessity -- most accounts never need a stack; the hosted runtime handles the vast majority…