Merge pull request #156 from argos-ci/clarify-how-baseline-build-is-chosen

fix: clarify how baseline build is chosen

Author: gregberge

docs/learn/baseline-build.mdx

@@ -22,7 +22,12 @@ A **baseline build** serves as the reference point for comparing screenshots to
 
 ## How does Argos determine the baseline build?
 
-Argos uses your Git commit history to identify the most recent successful build on the **baseline branch** (default branch or custom-configured branch). This build is then set as the baseline for screenshot comparisons.
+Argos selects the baseline build by finding the most recent **candidate build** that meets all of the following conditions:
+
+- Has the same build name as the triggered build
+- All framework tests passed
+- Be auto-approved, manually approved or orphan
+- Its commit is an ancestor of the merge base between the triggered build's commit and the baseline branch
 
 ## What is the baseline branch?