Posting rules and option catalog, per account

Everything a post to each account may carry, as data: the limits/can brief from GET /social-accounts plus options — every platform_configurations.<platform> key THIS account accepts, with kind (text | textarea | list | toggle | select), accepted values, default, max_length/max_items ceilings, placement gates (only_placement/except_placement) and a plain-English note where the key alone would mislead. Keys are filtered by the account's actual connection route — a key that would lose the whole post on this route (an Instagram first comment off bundle.social, reel music or a partnership label off Facebook Login) is simply absent. Pinterest accounts also answer boards: the live boards board_ids accepts, each { name, eligible, reason? } (null = lookup unavailable right now). board_ids is optional on Pinterest — with none, the pin goes to the account's catch-all board ("Unorganized ideas") — but a board name must come from this list, never a guess. A board with eligible: false is listed rather than hidden and CANNOT take a pin — a sandbox board refuses every real pin, and sending it loses the delivery. Read this before building platform_configurations instead of guessing from prose.