diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index af0d6f8..d186d73 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,3 +35,6 @@ jobs:
 
       - name: Build
         run: yarn run build
+
+      - name: Check package contents
+        run: yarn check:package
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 9451d1c..f13cf4a 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -56,5 +56,7 @@ jobs:
         run: yarn check
       - name: Build
         run: yarn build
+      - name: Check package contents
+        run: yarn check:package
       - name: Publish package
         run: yarn npm publish --access public --provenance
diff --git a/package.json b/package.json
index 30ed4cf..859186f 100644
--- a/package.json
+++ b/package.json
@@ -1,8 +1,13 @@
 {
   "name": "@huskly/cli",
-  "version": "1.2.6",
+  "version": "1.2.7",
   "description": "Terminal-based trading tools for Schwab and IBKR through the IBKR gateway",
   "type": "module",
+  "files": [
+    "dist",
+    "README.md",
+    "LICENSE"
+  ],
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "repository": "https://github.com/huskly/cli",
@@ -25,6 +30,7 @@
   },
   "scripts": {
     "build": "tsc -p tsconfig.build.json",
+    "check:package": "node scripts/checkPackageFiles.mjs",
     "start": "node dist/index.js",
     "dev": "tsx src/index.ts",
     "test": "node --conditions=tsx --import tsx --test \"test/**/*.test.ts\"",
diff --git a/scripts/checkPackageFiles.mjs b/scripts/checkPackageFiles.mjs
new file mode 100644
index 0000000..b1c1943
--- /dev/null
+++ b/scripts/checkPackageFiles.mjs
@@ -0,0 +1,20 @@
+import { execFileSync } from "node:child_process";
+import { readdir } from "node:fs/promises";
+
+const built = (await readdir("dist", { recursive: true }))
+  .filter((path) => path.endsWith(".js"))
+  .map((path) => `dist/${path}`);
+const packed = execFileSync("yarn", ["pack", "--dry-run", "--json"], {
+  encoding: "utf8",
+})
+  .trimEnd()
+  .split("\n")
+  .map((line) => JSON.parse(line).location)
+  .filter((path) => typeof path === "string");
+const missing = built.filter((path) => !packed.includes(path));
+
+if (built.length === 0 || missing.length > 0) {
+  throw new Error(`Package is missing built JavaScript files: ${missing.join(", ")}`);
+}
+
+console.log(`Package includes all ${built.length} built JavaScript files.`);