The Knicks locked up Landry Shamet, which, barring James Dolan changing his mind on the second apron, reiterated what we knew was happening: Mitchell Robinson is gone.

On the eve of free agency Monday, the Knicks and Shamet agreed to a four-year, $24 million pact — a big move for Leon Rose to re-up with one of his top two-way performers.

The Knicks fulfilled a goal and Shamet, who might’ve received more on the open market, has more security after playing the last two seasons on one-year minimum contracts.

The circumstances, while expected, leave the Knicks in need of a backup center.