It wasn't just Counter-Strike: Source and Day of Defeat: Source that received big updates today, as Valve also published a new update for Team Fortress 2 along with updating the Source SDK to include TF2!
Read the full article here: https://www.gamingonlinux.com/2025/02/team-fortress-2-major-update-released-and-source-available-for-modders-via-the-source-sdk/