diff --git a/.github/ensureManifests.js b/.github/ensureManifests.js
new file mode 100644
index 00000000..5c1dcc8b
--- /dev/null
+++ b/.github/ensureManifests.js
@@ -0,0 +1,30 @@
+import { findWorkspaces } from 'find-workspaces'
+import { existsSync } from 'node:fs'
+
+let result = 0
+
+for (const workspace of findWorkspaces()) {
+  if(workspace.package.private) {
+    continue
+  }
+
+  if (!(existsSync(workspace.location + '/manifest.ttl'))) {
+    console.log(`⚠️ ${workspace.package.name} - no manifest.ttl`)
+    continue
+  }
+
+  if(!workspace.package.files) {
+    console.log(`✅ ${workspace.package.name} - all files included in package`)
+    continue
+  }
+
+  if(workspace.package.files.includes('manifest.ttl')) {
+    console.log(`✅ ${workspace.package.name} - manifest.ttl file listed`)
+    continue
+  }
+
+  console.error(`❌ ${workspace.package.name} - manifest.ttl file not listed`)
+  result += 1
+}
+
+process.exit(result)
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index fa705a27..dcfa0f90 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -77,6 +77,14 @@ jobs:
       - run: npm ci
       - run: npm run lint
 
+  ensure-manifests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+      - run: npm ci
+      - run: node .github/ensure-manifests.js
+
   smoke-test-cli:
     strategy:
       fail-fast: false
diff --git a/package-lock.json b/package-lock.json
index 461e45ac..8dc9da5e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,6 +21,7 @@
         "c8": "^7.6.0",
         "chai": "^4.3.10",
         "eslint-import-resolver-typescript": "^3.6.1",
+        "find-workspaces": "^0.3.1",
         "husky": "^8.0.3",
         "lint-staged": "^13.2.2",
         "mocha": "^10.2.0",
@@ -7316,9 +7317,10 @@
       }
     },
     "node_modules/acorn": {
-      "version": "8.8.2",
+      "version": "8.12.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.12.0.tgz",
+      "integrity": "sha512-RTvkC4w+KNXrM39/lWCUaG0IbRkWdCv7W/IOW9oU6SawyxulvkQy5HQPVTKxEjczcUvapcrw3cFx/60VN/NRNw==",
       "dev": true,
-      "license": "MIT",
       "bin": {
         "acorn": "bin/acorn"
       },
@@ -10589,6 +10591,12 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/confbox": {
+      "version": "0.1.7",
+      "resolved": "https://registry.npmjs.org/confbox/-/confbox-0.1.7.tgz",
+      "integrity": "sha512-uJcB/FKZtBMCJpK8MQji6bJHgu1tixKPxRLeGkNzBoOZzpnZUJm0jm2/sBDWcuBx1dYgxV4JU+g5hmNxCyAmdA==",
+      "dev": true
+    },
     "node_modules/content-disposition": {
       "version": "0.5.4",
       "dev": true,
@@ -13679,6 +13687,17 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/find-workspaces": {
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/find-workspaces/-/find-workspaces-0.3.1.tgz",
+      "integrity": "sha512-UDkGILGJSA1LN5Aa7McxCid4sqW3/e+UYsVwyxki3dDT0F8+ym0rAfnCkEfkL0rO7M+8/mvkim4t/s3IPHmg+w==",
+      "dev": true,
+      "dependencies": {
+        "fast-glob": "^3.3.2",
+        "pkg-types": "^1.0.3",
+        "yaml": "^2.3.4"
+      }
+    },
     "node_modules/find-yarn-workspace-root2": {
       "version": "1.2.16",
       "dev": true,
@@ -21324,6 +21343,18 @@
         "mkdirp": "bin/cmd.js"
       }
     },
+    "node_modules/mlly": {
+      "version": "1.7.1",
+      "resolved": "https://registry.npmjs.org/mlly/-/mlly-1.7.1.tgz",
+      "integrity": "sha512-rrVRZRELyQzrIUAVMHxP97kv+G786pHmOKzuFII8zDYahFBS7qnHh2AlYSl1GAHhaMPCz6/oHjVMcfFYgFYHgA==",
+      "dev": true,
+      "dependencies": {
+        "acorn": "^8.11.3",
+        "pathe": "^1.1.2",
+        "pkg-types": "^1.1.1",
+        "ufo": "^1.5.3"
+      }
+    },
     "node_modules/mocha": {
       "version": "10.2.0",
       "dev": true,
@@ -22745,6 +22776,12 @@
         "node": ">=8"
       }
     },
+    "node_modules/pathe": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/pathe/-/pathe-1.1.2.tgz",
+      "integrity": "sha512-whLdWMYL2TwI08hn8/ZqAbrVemu0LNaNNJZX73O6qaIdCTfXutsLhMkjdENX0qhsQ9uIimo4/aQOmXkoon2nDQ==",
+      "dev": true
+    },
     "node_modules/pathval": {
       "version": "1.1.1",
       "license": "MIT",
@@ -22876,6 +22913,17 @@
         "node": ">=8"
       }
     },
+    "node_modules/pkg-types": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/pkg-types/-/pkg-types-1.1.1.tgz",
+      "integrity": "sha512-ko14TjmDuQJ14zsotODv7dBlwxKhUKQEhuhmbqo1uCi9BB0Z2alo/wAXg6q1dTR5TyuqYyWhjtfe/Tsh+X28jQ==",
+      "dev": true,
+      "dependencies": {
+        "confbox": "^0.1.7",
+        "mlly": "^1.7.0",
+        "pathe": "^1.1.2"
+      }
+    },
     "node_modules/pkgscan": {
       "version": "1.0.24",
       "license": "MIT",
@@ -26466,6 +26514,12 @@
         "node": ">=14.17"
       }
     },
+    "node_modules/ufo": {
+      "version": "1.5.3",
+      "resolved": "https://registry.npmjs.org/ufo/-/ufo-1.5.3.tgz",
+      "integrity": "sha512-Y7HYmWaFwPUmkoQCUIAYpKqkOf+SbVj/2fJJZ4RJMCfZp0rTGwRbzQD+HghfnhKOjL9E01okqz+ncJskGYfBNw==",
+      "dev": true
+    },
     "node_modules/unbox-primitive": {
       "version": "1.0.2",
       "dev": true,
@@ -27319,9 +27373,13 @@
       "license": "ISC"
     },
     "node_modules/yaml": {
-      "version": "2.3.1",
+      "version": "2.4.5",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.4.5.tgz",
+      "integrity": "sha512-aBx2bnqDzVOyNKfsysjA2ms5ZlnjSAW2eG3/L5G/CSujfjLJTJsEw1bGw8kCf04KodQWk1pxlGnZ56CRxiawmg==",
       "dev": true,
-      "license": "ISC",
+      "bin": {
+        "yaml": "bin.mjs"
+      },
       "engines": {
         "node": ">= 14"
       }
diff --git a/package.json b/package.json
index 048c2d70..27d95964 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
     "c8": "^7.6.0",
     "chai": "^4.3.10",
     "eslint-import-resolver-typescript": "^3.6.1",
+    "find-workspaces": "^0.3.1",
     "husky": "^8.0.3",
     "lint-staged": "^13.2.2",
     "mocha": "^10.2.0",