@@ -0,0 +1,5 @@
+---
+"@changesets/cli": minor
+---
+
+Allow comma-separated values in array-valued CLI flags: the `--major`, `--minor`, and `--patch` flags of the `add` command, and the `--ignore` flag of the `version` command. For example, `--minor pkg-a,pkg-b` is now equivalent to `--minor pkg-a --minor pkg-b`. Surrounding whitespace is trimmed and empty entries are ignored.
@@ -87,6 +87,28 @@ const tests: CommandTest[] = [
           patch: ["pkg-c", "pkg-d"],
         },
       },
+      {
+        args: [
+          "--minor",
+          "pkg-a, pkg-b",
+          "--patch",
+          "pkg-c,pkg-d",
+          "--patch",
+          "pkg-e",
+        ],
+        options: {
+          minor: ["pkg-a", "pkg-b"],
+          patch: ["pkg-c", "pkg-d", "pkg-e"],
+        },
+      },
+      {
+        // Surrounding whitespace is trimmed and empty entries (from repeated
+        // or trailing commas) are dropped via `.filter(Boolean)`.
+        args: ["--patch", " pkg-a , , pkg-b , "],
+        options: {
+          patch: ["pkg-a", "pkg-b"],
+        },
+      },
     ],
   },
   {
@@ -103,6 +125,20 @@ const tests: CommandTest[] = [
           ignore: ["pkg-a", "pkg-b"],
         },
       },
+      {
+        // The same comma-separated expansion applies to `--ignore`.
+        args: ["--ignore", "pkg-a,pkg-b"],
+        options: {
+          ignore: ["pkg-a", "pkg-b"],
+        },
+      },
+      {
+        // ...including trimming and dropping empty entries.
+        args: ["--ignore", " pkg-a , , pkg-b , "],
+        options: {
+          ignore: ["pkg-a", "pkg-b"],
+        },
+      },
       {
         args: ["--snapshot"],
         options: {
 
@@ -31,15 +31,23 @@ function normalizeOptions(
     }
 
     // If the flag is expected to be an array, ensure it's an array.
+    // Also expand comma-separated values so that e.g. `--minor pkg1,pkg2`
+    // is treated the same as `--minor pkg1 --minor pkg2`.
     if (array?.includes(key)) {
       const v = options[key];
-      options[key] = Array.isArray(v)
+      const values = Array.isArray(v)
         ? v.map(String)
         : [
             // those won't actually be objects and we want to stringify other primitive types
             // eslint-disable-next-line @typescript-eslint/no-base-to-string
             String(v),
           ];
+      options[key] = values.flatMap((value) =>
+        value
+          .split(",")
+          .map((part) => part.trim())
+          .filter(Boolean),
+      );
     }
     // If a flag is passed multiple times (becoming an array), only take the last value.
     else if (Array.isArray(options[key])) {
@@ -83,9 +91,9 @@ cli
     "Detect changed packages since the provided git ref",
   )
   .option("-m, --message <text>", "Directly provide a message to the changeset")
-  .option("--major <pkg>", "Package to major bump")
-  .option("--minor <pkg>", "Package to minor bump")
-  .option("--patch <pkg>", "Package to patch bump")
+  .option("--major <pkg>", "Package(s) to major bump (comma-separated)")
+  .option("--minor <pkg>", "Package(s) to minor bump (comma-separated)")
+  .option("--patch <pkg>", "Package(s) to patch bump (comma-separated)")
   .action(async (options) => {
     normalizeOptions(options, { array: ["major", "minor", "patch"] });
     const { add } = await import("./commands/add/index.ts");
-Original file line number
+Diff line change
@@ @@ -0,0 +1,5 @@ @@
 +---
 +"@changesets/cli": minor
 +---
++
 +Allow comma-separated values in array-valued CLI flags: the `--major`, `--minor`, and `--patch` flags of the `add` command, and the `--ignore` flag of the `version` command. For example, `--minor pkg-a,pkg-b` is now equivalent to `--minor pkg-a --minor pkg-b`. Surrounding whitespace is trimmed and empty entries are ignored.