many many times in the past I had this impostor syndrome in various situations but I never lost faith in my dev skills!

you have to be humble to realise that this situations are fine and that you will learn something from it (not necessarily tech things, but also how life works). Also you have to realise that development as everything else in life is just never ending learning endeavour! When you accept all of that, impostor syndrome goes away forever.

It's been around 3 years since I felt like impostor for the last time because I accepted who I am as a person.

It crawled up on me last week in a different way - I was thinking of myself - what if I am just really good at googling things and understanding how those things work but I am also very capable problem solver so I can understand the principle and apply it to my code.

Then I realised - ok, that's what programmers do! So that's the story of how the impostor syndrome actually become confirmation syndrome!

Folks, believe in yourself, be forgiving to yourself as we all were there, give yourself some time as people don't become good developers overnight - and this is OK.