Add github code annotation for failed test
It would be be great if you can add code annotation to failed cypress e2e test. There is a nice example with Jest

It looks like the simplest way to do this is to have the action register a problem matcher
Cypress test output however will not reference source lines/files, so we're not going to see in-source annotations like that, but the errors could at least be connected into the annotations list you see highlighted when you open up a failed run
I was just thinking about this. We could add annotations (super useful), but an update to the output from the Cypress project would be required to get file name/line numbers. A PR to at least add annotations would be a good first step
@NicholasBoll Actually we have this information. Specifically as part of this PR: https://github.com/cypress-io/cypress/pull/3930
I will have to investigate whether this is being passed through to the reporting output though.
Awesome! Once there is output that can be processed by regular expressions, annotation support is fairly easy to add.
As an example, the parse config for eslint-stylish in the setup-node action is here: https://github.com/actions/setup-node/blob/master/.github/eslint-stylish.json. This is what activates that matcher: https://github.com/actions/setup-node/blob/releases/v1/src/setup-node.ts#L30