Hello , is there any wiki / tutorial / screencast/ blog that can help me to start my first k2 extension component. maybe a 'hello world' tutorial ?Thanks

Do i have to view k2 component source code ? or there's any API documentation ? php docs ? etc ? i want to make a custom mod based on k2 component...

i see event like
$item->event->K2BeforeDisplay = '';
$item->event->K2AfterDisplay = '';
$item->event->K2AfterDisplayTitle = '';
$item->event->K2BeforeDisplayContent = '';
$item->event->K2AfterDisplayContent = '';
$item->event->K2CommentsCounter = '';

any documentation for these ?

I havent seen one, but there is an example plugin here somewhere, i think in either the blog or documentaion area

Please post if you find the reference.. a wiki/documentation site for developer will make a learning curve shorter compare to reading the code for hours...

this is pretty old stuff and may not woke with 2.4 but its a start
community.getk2.org/forum/topics/example-k2-plugin-for