diff --git a/.changeset/plugin-cli-kebab-flags.md b/.changeset/plugin-cli-kebab-flags.md
new file mode 100644
index 000000000..0db1e90b2
--- /dev/null
+++ b/.changeset/plugin-cli-kebab-flags.md
@@ -0,0 +1,10 @@
+---
+"@emdash-cms/plugin-cli": patch
+---
+
+Renames the multi-word flags on `build`, `dev`, and `bundle` from camelCase to kebab-case for consistency with `publish` and standard Unix CLI convention.
+
+- `--outDir` -> `--out-dir`
+- `--validateOnly` -> `--validate-only`
+
+The short alias `-o` for `--out-dir` is unchanged.
diff --git a/packages/plugin-cli/src/build/command.ts b/packages/plugin-cli/src/build/command.ts
index 342f64677..c6b93be22 100644
--- a/packages/plugin-cli/src/build/command.ts
+++ b/packages/plugin-cli/src/build/command.ts
@@ -30,7 +30,7 @@ export const buildCommand = defineCommand({
 			description: "Plugin directory (default: current directory)",
 			default: process.cwd(),
 		},
-		outDir: {
+		"out-dir": {
 			type: "string",
 			alias: "o",
 			description: "Output directory (default: ./dist)",
@@ -49,7 +49,7 @@ export const buildCommand = defineCommand({
 		try {
 			result = await buildPlugin({
 				dir: args.dir,
-				outDir: args.outDir,
+				outDir: args["out-dir"],
 				logger,
 			});
 		} catch (error) {
diff --git a/packages/plugin-cli/src/bundle/command.ts b/packages/plugin-cli/src/bundle/command.ts
index 382e95177..d76c3920b 100644
--- a/packages/plugin-cli/src/bundle/command.ts
+++ b/packages/plugin-cli/src/bundle/command.ts
@@ -26,13 +26,13 @@ export const bundleCommand = defineCommand({
 			description: "Plugin directory (default: current directory)",
 			default: process.cwd(),
 		},
-		outDir: {
+		"out-dir": {
 			type: "string",
 			alias: "o",
 			description: "Output directory for the tarball (default: ./dist)",
 			default: "dist",
 		},
-		validateOnly: {
+		"validate-only": {
 			type: "boolean",
 			description: "Run validation only, skip tarball creation",
 			default: false,
@@ -50,8 +50,8 @@ export const bundleCommand = defineCommand({
 		try {
 			result = await bundlePlugin({
 				dir: args.dir,
-				outDir: args.outDir,
-				validateOnly: args.validateOnly,
+				outDir: args["out-dir"],
+				validateOnly: args["validate-only"],
 				logger,
 			});
 		} catch (error) {
@@ -67,7 +67,7 @@ export const bundleCommand = defineCommand({
 		// hosts the artifact (GitHub release asset, R2, S3, their own server)
 		// and the registry indexes the URL. Spell out the next step so users
 		// don't have to dig for it.
-		if (!args.validateOnly && result.tarballPath) {
+		if (!args["validate-only"] && result.tarballPath) {
 			console.log();
 			consola.info("Next steps:");
 			console.log(`  1. Upload ${pc.cyan(result.tarballPath)} to a public URL.`);
diff --git a/packages/plugin-cli/src/dev/command.ts b/packages/plugin-cli/src/dev/command.ts
index 4e1e002e5..6335abcae 100644
--- a/packages/plugin-cli/src/dev/command.ts
+++ b/packages/plugin-cli/src/dev/command.ts
@@ -58,7 +58,7 @@ export const devCommand = defineCommand({
 			description: "Plugin directory (default: current directory)",
 			default: process.cwd(),
 		},
-		outDir: {
+		"out-dir": {
 			type: "string",
 			alias: "o",
 			description: "Output directory (default: ./dist)",
@@ -93,7 +93,7 @@ export const devCommand = defineCommand({
 			try {
 				await buildPlugin({
 					dir: args.dir,
-					outDir: args.outDir,
+					outDir: args["out-dir"],
 					logger,
 				});
 			} catch (error) {
@@ -146,10 +146,10 @@ export const devCommand = defineCommand({
 		await runBuild("initial build");
 
 		// Resolve outDir relative to the plugin dir so the ignore
-		// pattern matches whatever the user passed for `--outDir`.
+		// pattern matches whatever the user passed for `--out-dir`.
 		// chokidar wants forward-slash globs even on Windows, so
 		// normalise the platform separator (path.sep) to "/".
-		const resolvedOutDir = resolve(args.dir, args.outDir);
+		const resolvedOutDir = resolve(args.dir, args["out-dir"]);
 		const cwdAbs = resolve(args.dir);
 		const outDirRel = relative(cwdAbs, resolvedOutDir);
 		// `outDirGlob` is the ignore pattern only when outDir is
diff --git a/packages/plugin-cli/tests/bundle.test.ts b/packages/plugin-cli/tests/bundle.test.ts
index 632e8c8c1..ca11f255b 100644
--- a/packages/plugin-cli/tests/bundle.test.ts
+++ b/packages/plugin-cli/tests/bundle.test.ts
@@ -15,7 +15,7 @@ const BAD_FIXTURE = fileURLToPath(new URL("./fixtures/bad-plugin", import.meta.u
  * directory, assert the resulting tarball + manifest match expectations.
  *
  * Each test runs the bundler at a different `outDir` under a fresh tempdir so
- * concurrent runs don't collide, and so `--outDir` resolution works as
+ * concurrent runs don't collide, and so `--out-dir` resolution works as
  * advertised (it can be either absolute or relative to `dir`).
  */
 describe("bundlePlugin", () => {