Two consumers read ci/excluded-charts.txt: this script and the install-test matrix in validate-charts.yml, which has to drop excluded charts before the matrix is built (#231). Two parsers would be two chances to select different charts, and the disagreement would be silent in either direction. So the script grows a --list-excluded mode and the workflow will call it instead of re-implementing the parsing.
A line carrying only a chart name and no justification is deliberately not an exclusion: the README requires the reason, and a bare name would drop a chart out of CI with nothing to review. The reason lookup matches the name exactly instead of as a regex, so a chart name is never read as a pattern.
The workflow side is not part of this commit.
jklein
7e168da492