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The 45-year-old joins from Barnsley to replace Russell Martin, whose move to Southampton was confirmed on Wednesday, and has cost the Swans £500,000.

Duff emerged as the Swans’ first choice last weekend with the club having been interested in former assistant Chris Davies as well as Birmingham boss John Eustace.

“We need that one team mentality; the players, staff, fans, and board. Everyone needs to pull in the same direction because that’s the only way you’re going to achieve success,” Duff told Swansea’s official club website.

“I’ve had seven promotions in my career as a player and manager so I know what an environment should look and smell like.

“I want to play good football and I know that there is an expectation of that at this football club, but it’s about evolving it, moving it and being a bit more on the front foot and a bit more progressive at times.

“It’s about getting the balance of all those things because ultimately it’s a winning business. You’ve got to win.”

Former Burnley midfielder Duff spent just a year at Oakwell but guided them to the League One play-offs last season.

The Tykes lost 1-0 in the last minute of extra time to Sheffield Wednesday in the final at Wembley.

Duff spent four years as Cheltenham manager, winning League Two in 2021 – the club’s first league title in their history – before cementing the Robins’ place in League One and joining Barnsley last summer, finishing fourth.

Swansea finished 10th in the Championship last season under Martin.