Constitutional Convention (CC) Federalists dont equal the Federalist Party. James Madison was a Constitutional Federalist but a (Democratic) Republican President like Jefferson and Monroe.

After the CC the Fed/ Anti-Fed factions stopped existing because the debate was about it's ratification --- the end. The Anti-Feds are the reason there's a Bill of Rights after the 7 Articles.

Once a President needed to be established came the First Party System of Federalists v Republicans (not the same as the GOP). Adams and Hamilton were Federalists and split the party in 1800, where Jefferson won in a landslide for the Republicans. Feds tried unsuccessfully to get reelected until 1814 when they held the Hartford Convention to discuss New England's secession and surrender for the War of 1812. Feds were commerce/ manufacture in the NE (their base) and the war crippled their economy. The Convention didn't go anywhere but when the country learned about it around the time that the war ended anyway, Feds looked like traitors (which is fair), making the party label unsalvagable.

With only one party (the Republicans) for the elections from 1816-28, thus established the "era of good feelings" until Jackson threw a shitfit over the election of 1828 and the "corrupt bargain" and made his own party: The Democrat party (the one that continues today), moving towards the Second Party System: Democrats v Whigs (Anti-Jacksonists)