stevenzwu commented on code in PR #16689:
URL: https://github.com/apache/iceberg/pull/16689#discussion_r3391465495


##########
core/src/main/java/org/apache/iceberg/TrackingBuilder.java:
##########
@@ -99,35 +98,54 @@ private TrackingBuilder(Tracking source, long 
newSnapshotId) {
     this.replacedPositions = null;
   }
 
-  /** Indicates that the DV has been updated for the new Tracking. */
+  /**
+   * Records that the file's DV was updated by this commit, advancing {@code 
dvSnapshotId} to the
+   * commit snapshot. An EXISTING entry transitions to MODIFIED; an ADDED 
entry stays ADDED (a file
+   * added and given a DV in the same commit).

Review Comment:
   I created a PR that updates the AGENTS.md file so that others can benefit 
from this guidance. 
   https://github.com/apache/iceberg/pull/16764



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