The macro let-alist is too useful to work with JSON-parsed data for it to be missing from the docs.

In the page https://www.gnu.org/software/emacs/manual/html_node/elisp/Association-Lists.html we should add some documentation about it. Below a suggestion.

Thank you!

— Macro: let-alist `value`
Creates a binding for each symbol in the association list `value`, prefixed with dot. This is very useful when accessing several items in the same alist, and it's best understood through a simple example:

(setq colors '((rose red) (lily white) (buttercup yellow)))
(let-alist colors
    (print .rose)
    (print .buttercup))
    ⇒ red
    ⇒ yellow



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