I've interpreted the artemisia to include vermouth, and I am celebrating with a Californie Palace -- an aromatic Last Word that swaps out the lime for dry vermouth and bitters.

The French Republican Calendar celebrated Absinthe (Artemisia absinthium) on 27th June. The calendar concocted by André Thouin, the head of the Jardins des Plantes, and the poet Fabre d’Églantine, celebrated the in-season plants to "make the people more aware of the passage of the seasons".
It's a neat way of choosing a cocktail ingredient:
27th June: Absinthe /
1 July: Clove /
2 July: Lavender /
5 July: Redcurrant /
7 Jult: Cherry /
9 July: Mint /
etc

"OG Negroni"? Twenty variants in, I am increasingly diffident about trying Negroni riffs and adjacents, but always interested to hear other people's favourites. What is the OG Negroni?

I like the Carpano Antica Formula in my classic Negroni, but am just starting to experiment with peated whisky. I'm tempted by this
[Winterised Negroni]

He shakes rather than stirs! Your text "he breaks bartending convention to stir rather than shake" implies the opposite!