installable through a Package Control channel

repository.json describes vDiff itself; "tags": true means a release is a
pushed git tag. channel.json is the file users add to their "channels"
setting - it holds nothing but repository URLs, so packages added to it
later reach existing users without them changing anything.

The two are easy to confuse: Package Control rejects a file under
"channels" unless it has a top-level "repositories" key, so a repository
file belongs in "repositories". The README spells that out.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

.gitattributes

@@ -0,0 +1,11 @@
+# Keep the release archive to what Sublime actually loads. Package Control
+# installs whatever the tag's zip contains, and GitHub builds that zip with
+# git archive, which honours export-ignore.
+.claude/            export-ignore
+tests/              export-ignore
+.gitattributes      export-ignore
+.gitignore          export-ignore
+diff.sublime-project export-ignore
+TODO.txt            export-ignore
+channel.json        export-ignore
+repository.json     export-ignore