We are using dorny/path-filter GitHub action to see which files are changed in our CI.
There is a scenario where it is not optimized.

Current behavior

1. I change a go file in the first commit, and the path filter detects these changes and runs all go tests.
2. In 2nd commit, I change some docs and push, the paths filter compares the current PR branch with the main and again detects that a go file and some docs are changed so it runs all go tests

Solution:

run on pushing to any branch.

on:
  push

This will allow using a base property to set the base as the current branch: github.ref and will detect changes between consecutive commits

This seems to work and is skipping other tests when only the .md file is changed
https://github.com/coder/coder/actions/workflows/ci.yaml?query=branch%3Amatifali%2Foptimize-ci

New Behavior

1. I update a go file, changes is detected and and ci runs go tests.
2. I update docs, ci detects that only docs are changed so go tests are skipped.
3. I merge main and it has some go and ts files changes. ci runs all go and ts tests.
4. I again update only docs, ci skip go and tss tests.

This can save us some ci minutes.