Vladimir Putin personally authorised a secret spy agency operation to support a “mentally unstable” Donald Trump in the 2016 US presidential election during a closed session of Russia’s national security council, according to what are assessed to be leaked Kremlin documents.

The key meeting took place on 22 January 2016, the papers suggest, with the Russian president, his spy chiefs and senior ministers all present.

They agreed a Trump White House would help secure Moscow’s strategic objectives, among them “social turmoil” in the US and a weakening of the American president’s negotiating position.

Russia’s three spy agencies were ordered to find practical ways to support Trump, in a decree appearing to bear Putin’s signature.

The report – “No 32-04 \ vd” – is classified as secret. It says Trump is the “most promising candidate” from the Kremlin’s point of view. The word in Russian is perspektivny.

There is a brief psychological assessment of Trump, who is described as an “impulsive, mentally unstable and unbalanced individual who suffers from an inferiority complex”.

There is also apparent confirmation that the Kremlin possesses kompromat, or potentially compromising material, on the future president, collected – the document says – from Trump’s earlier “non-official visits to Russian Federation territory”.

The paper refers to “certain events” that happened during Trump’s trips to Moscow. Security council members are invited to find details in appendix five, at paragraph five, the document states. It is unclear what the appendix contains.