diff --git a/.commitlintrc.js b/.commitlintrc.js
new file mode 100644
index 0000000..520ca49
--- /dev/null
+++ b/.commitlintrc.js
@@ -0,0 +1,16 @@
+module.exports = {
+  extends: ['@commitlint/config-conventional'],
+  rules  : {
+    'scope-enum': [
+      2, 'always', [
+        'project',
+        'schema',
+        'neo4j',
+        'resolvers',
+        'queries',
+        'mutations',
+        'subscriptions'
+      ],
+    ],
+  },
+};
diff --git a/package-lock.json b/package-lock.json
index 79e575c..036a5e0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "ce-api",
-  "version": "0.6.0",
+  "version": "0.6.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -985,6 +985,285 @@
         "minimist": "^1.2.0"
       }
     },
+    "@commitlint/cli": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/cli/-/cli-8.3.4.tgz",
+      "integrity": "sha512-lYL61eO5CG5Du3YTOt8eXg959awIpl/u2KL+msctbooUGTDtiknvBb1r7dbdpUYwVMWcgdKQsk9heB+FRdygfA==",
+      "dev": true,
+      "requires": {
+        "@commitlint/format": "^8.3.4",
+        "@commitlint/lint": "^8.3.4",
+        "@commitlint/load": "^8.3.4",
+        "@commitlint/read": "^8.3.4",
+        "babel-polyfill": "6.26.0",
+        "chalk": "2.4.2",
+        "get-stdin": "7.0.0",
+        "lodash": "4.17.15",
+        "meow": "5.0.0",
+        "resolve-from": "5.0.0",
+        "resolve-global": "1.0.0"
+      },
+      "dependencies": {
+        "get-stdin": {
+          "version": "7.0.0",
+          "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-7.0.0.tgz",
+          "integrity": "sha512-zRKcywvrXlXsA0v0i9Io4KDRaAw7+a1ZpjRwl9Wox8PFlVCCHra7E9c4kqXCoCM9nR5tBkaTTZRBoCm60bFqTQ==",
+          "dev": true
+        },
+        "resolve-from": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-5.0.0.tgz",
+          "integrity": "sha512-qYg9KP24dD5qka9J47d0aVky0N+b4fTU89LN9iDnjB5waksiC49rvMB0PrUJQGoTmH50XPiqOvAjDfaijGxYZw==",
+          "dev": true
+        }
+      }
+    },
+    "@commitlint/config-conventional": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/config-conventional/-/config-conventional-8.3.4.tgz",
+      "integrity": "sha512-w0Yc5+aVAjZgjYqx29igBOnVCj8O22gy3Vo6Fyp7PwoS7+AYS1x3sN7IBq6i7Ae15Mv5P+rEx1pkxXo5zOMe4g==",
+      "dev": true,
+      "requires": {
+        "conventional-changelog-conventionalcommits": "4.2.1"
+      },
+      "dependencies": {
+        "conventional-changelog-conventionalcommits": {
+          "version": "4.2.1",
+          "resolved": "https://registry.npmjs.org/conventional-changelog-conventionalcommits/-/conventional-changelog-conventionalcommits-4.2.1.tgz",
+          "integrity": "sha512-vC02KucnkNNap+foDKFm7BVUSDAXktXrUJqGszUuYnt6T0J2azsbYz/w9TDc3VsrW2v6JOtiQWVcgZnporHr4Q==",
+          "dev": true,
+          "requires": {
+            "compare-func": "^1.3.1",
+            "lodash": "^4.2.1",
+            "q": "^1.5.1"
+          }
+        }
+      }
+    },
+    "@commitlint/ensure": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/ensure/-/ensure-8.3.4.tgz",
+      "integrity": "sha512-8NW77VxviLhD16O3EUd02lApMFnrHexq10YS4F4NftNoErKbKaJ0YYedktk2boKrtNRf/gQHY/Qf65edPx4ipw==",
+      "dev": true,
+      "requires": {
+        "lodash": "4.17.15"
+      }
+    },
+    "@commitlint/execute-rule": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/execute-rule/-/execute-rule-8.3.4.tgz",
+      "integrity": "sha512-f4HigYjeIBn9f7OuNv5zh2y5vWaAhNFrfeul8CRJDy82l3Y+09lxOTGxfF3uMXKrZq4LmuK6qvvRCZ8mUrVvzQ==",
+      "dev": true
+    },
+    "@commitlint/format": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/format/-/format-8.3.4.tgz",
+      "integrity": "sha512-809wlQ/ND6CLZON+w2Rb3YM2TLNDfU2xyyqpZeqzf2reJNpySMSUAeaO/fNDJSOKIsOsR3bI01rGu6hv28k+Nw==",
+      "dev": true,
+      "requires": {
+        "chalk": "^2.0.1"
+      }
+    },
+    "@commitlint/is-ignored": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/is-ignored/-/is-ignored-8.3.4.tgz",
+      "integrity": "sha512-9RTWJvOW2ZvOh09xRnw7wQhcSp24ekeChDPAoZV13d5cTay0qcGFFthvwHs6URstKuu6Iasoxswtq0HmTWvoAg==",
+      "dev": true,
+      "requires": {
+        "@types/semver": "^6.0.1",
+        "semver": "6.3.0"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
+          "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==",
+          "dev": true
+        }
+      }
+    },
+    "@commitlint/lint": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/lint/-/lint-8.3.4.tgz",
+      "integrity": "sha512-ws1JLs7rNAcwlfYLKh0xhs3RNMcT4dYjyG0US/JenmSCrttzfAct+7IvdkAjkj6/3jsOn6fYaV4MhE6hfdPC9A==",
+      "dev": true,
+      "requires": {
+        "@commitlint/is-ignored": "^8.3.4",
+        "@commitlint/parse": "^8.3.4",
+        "@commitlint/rules": "^8.3.4",
+        "babel-runtime": "^6.23.0",
+        "lodash": "4.17.15"
+      }
+    },
+    "@commitlint/load": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/load/-/load-8.3.4.tgz",
+      "integrity": "sha512-B4MylKvT02UE3VHC5098OHxsrgkADUy5AD4Cdkiy7oX/edWypEmvK7Wuns3B9dwluWP/iFM6daoWtpkCVZoRwQ==",
+      "dev": true,
+      "requires": {
+        "@commitlint/execute-rule": "^8.3.4",
+        "@commitlint/resolve-extends": "^8.3.4",
+        "babel-runtime": "^6.23.0",
+        "chalk": "2.4.2",
+        "cosmiconfig": "^5.2.0",
+        "lodash": "4.17.15",
+        "resolve-from": "^5.0.0"
+      },
+      "dependencies": {
+        "resolve-from": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-5.0.0.tgz",
+          "integrity": "sha512-qYg9KP24dD5qka9J47d0aVky0N+b4fTU89LN9iDnjB5waksiC49rvMB0PrUJQGoTmH50XPiqOvAjDfaijGxYZw==",
+          "dev": true
+        }
+      }
+    },
+    "@commitlint/message": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/message/-/message-8.3.4.tgz",
+      "integrity": "sha512-nEj5tknoOKXqBsaQtCtgPcsAaf5VCg3+fWhss4Vmtq40633xLq0irkdDdMEsYIx8rGR0XPBTukqzln9kAWCkcA==",
+      "dev": true
+    },
+    "@commitlint/parse": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/parse/-/parse-8.3.4.tgz",
+      "integrity": "sha512-b3uQvpUQWC20EBfKSfMRnyx5Wc4Cn778bVeVOFErF/cXQK725L1bYFvPnEjQO/GT8yGVzq2wtLaoEqjm1NJ/Bw==",
+      "dev": true,
+      "requires": {
+        "conventional-changelog-angular": "^1.3.3",
+        "conventional-commits-parser": "^3.0.0",
+        "lodash": "^4.17.11"
+      },
+      "dependencies": {
+        "conventional-changelog-angular": {
+          "version": "1.6.6",
+          "resolved": "https://registry.npmjs.org/conventional-changelog-angular/-/conventional-changelog-angular-1.6.6.tgz",
+          "integrity": "sha512-suQnFSqCxRwyBxY68pYTsFkG0taIdinHLNEAX5ivtw8bCRnIgnpvcHmlR/yjUyZIrNPYAoXlY1WiEKWgSE4BNg==",
+          "dev": true,
+          "requires": {
+            "compare-func": "^1.3.1",
+            "q": "^1.5.1"
+          }
+        }
+      }
+    },
+    "@commitlint/read": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/read/-/read-8.3.4.tgz",
+      "integrity": "sha512-FKv1kHPrvcAG5j+OSbd41IWexsbLhfIXpxVC/YwQZO+FR0EHmygxQNYs66r+GnhD1EfYJYM4WQIqd5bJRx6OIw==",
+      "dev": true,
+      "requires": {
+        "@commitlint/top-level": "^8.3.4",
+        "@marionebl/sander": "^0.6.0",
+        "babel-runtime": "^6.23.0",
+        "git-raw-commits": "^2.0.0"
+      }
+    },
+    "@commitlint/resolve-extends": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/resolve-extends/-/resolve-extends-8.3.4.tgz",
+      "integrity": "sha512-M34RLaAW1eGWgtkVtotHfPaJa+cZIARe8twKItd7RhWs7n/1W2py9GTFIiIEq95LBN1uah5vm1WQHsfLqPZYHA==",
+      "dev": true,
+      "requires": {
+        "@types/node": "^12.0.2",
+        "import-fresh": "^3.0.0",
+        "lodash": "4.17.15",
+        "resolve-from": "^5.0.0",
+        "resolve-global": "^1.0.0"
+      },
+      "dependencies": {
+        "@types/node": {
+          "version": "12.12.24",
+          "resolved": "https://registry.npmjs.org/@types/node/-/node-12.12.24.tgz",
+          "integrity": "sha512-1Ciqv9pqwVtW6FsIUKSZNB82E5Cu1I2bBTj1xuIHXLe/1zYLl3956Nbhg2MzSYHVfl9/rmanjbQIb7LibfCnug==",
+          "dev": true
+        },
+        "resolve-from": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-5.0.0.tgz",
+          "integrity": "sha512-qYg9KP24dD5qka9J47d0aVky0N+b4fTU89LN9iDnjB5waksiC49rvMB0PrUJQGoTmH50XPiqOvAjDfaijGxYZw==",
+          "dev": true
+        }
+      }
+    },
+    "@commitlint/rules": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/rules/-/rules-8.3.4.tgz",
+      "integrity": "sha512-xuC9dlqD5xgAoDFgnbs578cJySvwOSkMLQyZADb1xD5n7BNcUJfP8WjT9W1Aw8K3Wf8+Ym/ysr9FZHXInLeaRg==",
+      "dev": true,
+      "requires": {
+        "@commitlint/ensure": "^8.3.4",
+        "@commitlint/message": "^8.3.4",
+        "@commitlint/to-lines": "^8.3.4",
+        "babel-runtime": "^6.23.0"
+      }
+    },
+    "@commitlint/to-lines": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/to-lines/-/to-lines-8.3.4.tgz",
+      "integrity": "sha512-5AvcdwRsMIVq0lrzXTwpbbG5fKRTWcHkhn/hCXJJ9pm1JidsnidS1y0RGkb3O50TEHGewhXwNoavxW9VToscUA==",
+      "dev": true
+    },
+    "@commitlint/top-level": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@commitlint/top-level/-/top-level-8.3.4.tgz",
+      "integrity": "sha512-nOaeLBbAqSZNpKgEtO6NAxmui1G8ZvLG+0wb4rvv6mWhPDzK1GNZkCd8FUZPahCoJ1iHDoatw7F8BbJLg4nDjg==",
+      "dev": true,
+      "requires": {
+        "find-up": "^4.0.0"
+      },
+      "dependencies": {
+        "find-up": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/find-up/-/find-up-4.1.0.tgz",
+          "integrity": "sha512-PpOwAdQ/YlXQ2vj8a3h8IipDuYRi3wceVQQGYWxNINccq40Anw7BlsEXCMbt1Zt+OLA6Fq9suIpIWD0OsnISlw==",
+          "dev": true,
+          "requires": {
+            "locate-path": "^5.0.0",
+            "path-exists": "^4.0.0"
+          }
+        },
+        "locate-path": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-5.0.0.tgz",
+          "integrity": "sha512-t7hw9pI+WvuwNJXwk5zVHpyhIqzg2qTlklJOf0mVxGSbe3Fp2VieZcduNYjaLDoy6p9uGpQEGWG87WpMKlNq8g==",
+          "dev": true,
+          "requires": {
+            "p-locate": "^4.1.0"
+          }
+        },
+        "p-limit": {
+          "version": "2.2.2",
+          "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.2.2.tgz",
+          "integrity": "sha512-WGR+xHecKTr7EbUEhyLSh5Dube9JtdiG78ufaeLxTgpudf/20KqyMioIUZJAezlTIi6evxuoUs9YXc11cU+yzQ==",
+          "dev": true,
+          "requires": {
+            "p-try": "^2.0.0"
+          }
+        },
+        "p-locate": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-4.1.0.tgz",
+          "integrity": "sha512-R79ZZ/0wAxKGu3oYMlz8jy/kbhsNrS7SKZ7PxEHBgJ5+F2mtFW2fK2cOtBh1cHYkQsbzFV7I+EoRKe6Yt0oK7A==",
+          "dev": true,
+          "requires": {
+            "p-limit": "^2.2.0"
+          }
+        },
+        "p-try": {
+          "version": "2.2.0",
+          "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
+          "integrity": "sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==",
+          "dev": true
+        },
+        "path-exists": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-4.0.0.tgz",
+          "integrity": "sha512-ak9Qy5Q7jYb2Wwcey5Fpvg2KoAc/ZIhLSLOSBmRmygPsGwkVVt0fZa0qrtMz+m6tJTAHfZQ8FnmB4MG4LWy7/w==",
+          "dev": true
+        }
+      }
+    },
     "@jest/console": {
       "version": "24.9.0",
       "resolved": "https://registry.npmjs.org/@jest/console/-/console-24.9.0.tgz",
@@ -1177,6 +1456,17 @@
         "@types/yargs": "^13.0.0"
       }
     },
+    "@marionebl/sander": {
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/@marionebl/sander/-/sander-0.6.1.tgz",
+      "integrity": "sha1-GViWWHTyS8Ub5Ih1/rUNZC/EH3s=",
+      "dev": true,
+      "requires": {
+        "graceful-fs": "^4.1.3",
+        "mkdirp": "^0.5.1",
+        "rimraf": "^2.5.2"
+      }
+    },
     "@nodelib/fs.scandir": {
       "version": "2.1.3",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.3.tgz",
@@ -1508,6 +1798,12 @@
       "resolved": "https://registry.npmjs.org/@types/range-parser/-/range-parser-1.2.3.tgz",
       "integrity": "sha512-ewFXqrQHlFsgc09MK5jP5iR7vumV/BYayNC6PgJO2LPe8vrnNFyjQjSppfEngITi0qvfKtzFvgKymGheFM9UOA=="
     },
+    "@types/semver": {
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/@types/semver/-/semver-6.2.0.tgz",
+      "integrity": "sha512-1OzrNb4RuAzIT7wHSsgZRlMBlNsJl+do6UblR7JMW4oB7bbR+uBEYtUh7gEc/jM84GGilh68lSOokyM/zNUlBA==",
+      "dev": true
+    },
     "@types/serve-static": {
       "version": "1.13.3",
       "resolved": "https://registry.npmjs.org/@types/serve-static/-/serve-static-1.13.3.tgz",
@@ -2379,6 +2675,31 @@
         "@types/babel__traverse": "^7.0.6"
       }
     },
+    "babel-polyfill": {
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-polyfill/-/babel-polyfill-6.26.0.tgz",
+      "integrity": "sha1-N5k3q8Z9eJWXCtxiHyhM2WbPIVM=",
+      "dev": true,
+      "requires": {
+        "babel-runtime": "^6.26.0",
+        "core-js": "^2.5.0",
+        "regenerator-runtime": "^0.10.5"
+      },
+      "dependencies": {
+        "core-js": {
+          "version": "2.6.11",
+          "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.11.tgz",
+          "integrity": "sha512-5wjnpaT/3dV+XB4borEsnAYQchn00XSgTAWKDkEqv+K8KevjbzmofK6hfJ9TZIlpj2N0xQpazy7PiRQiWHqzWg==",
+          "dev": true
+        },
+        "regenerator-runtime": {
+          "version": "0.10.5",
+          "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.10.5.tgz",
+          "integrity": "sha1-M2w+/BIgrc7dosn6tntaeVWjNlg=",
+          "dev": true
+        }
+      }
+    },
     "babel-preset-jest": {
       "version": "24.9.0",
       "resolved": "https://registry.npmjs.org/babel-preset-jest/-/babel-preset-jest-24.9.0.tgz",
@@ -2389,6 +2710,30 @@
         "babel-plugin-jest-hoist": "^24.9.0"
       }
     },
+    "babel-runtime": {
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-6.26.0.tgz",
+      "integrity": "sha1-llxwWGaOgrVde/4E/yM3vItWR/4=",
+      "dev": true,
+      "requires": {
+        "core-js": "^2.4.0",
+        "regenerator-runtime": "^0.11.0"
+      },
+      "dependencies": {
+        "core-js": {
+          "version": "2.6.11",
+          "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.11.tgz",
+          "integrity": "sha512-5wjnpaT/3dV+XB4borEsnAYQchn00XSgTAWKDkEqv+K8KevjbzmofK6hfJ9TZIlpj2N0xQpazy7PiRQiWHqzWg==",
+          "dev": true
+        },
+        "regenerator-runtime": {
+          "version": "0.11.1",
+          "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz",
+          "integrity": "sha512-MguG95oij0fC3QV3URf4V2SDYGJhJnJGqvIIgdECeODCT98wSWDAJ94SSuVpYQUoTcGUIL6L4yNB7j1DFFHSBg==",
+          "dev": true
+        }
+      }
+    },
     "backo2": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/backo2/-/backo2-1.0.2.tgz",
@@ -8265,9 +8610,9 @@
       }
     },
     "node-fetch": {
-      "version": "2.6.0",
-      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.0.tgz",
-      "integrity": "sha512-8dG4H5ujfvFiqDmVu9fQ5bOHUC15JMjMY/Zumv26oOvvVJjM67KF8koCWIabKQ1GJIa9r2mMZscBq/TbdOcmNA=="
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.3.0.tgz",
+      "integrity": "sha512-MOd8pV3fxENbryESLgVIeaGKrdl+uaYhCSSVkjeOb/31/njTpcis5aWfdqgNlHIrKOLRbMnfPINPOML2CIFeXA=="
     },
     "node-int64": {
       "version": "0.4.0",
@@ -9420,6 +9765,15 @@
       "integrity": "sha1-six699nWiBvItuZTM17rywoYh0g=",
       "dev": true
     },
+    "resolve-global": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/resolve-global/-/resolve-global-1.0.0.tgz",
+      "integrity": "sha512-zFa12V4OLtT5XUX/Q4VLvTfBf+Ok0SPc1FNGM/z9ctUdiU618qwKpWnd0CHs3+RqROfyEg/DhuHbMWYqcgljEw==",
+      "dev": true,
+      "requires": {
+        "global-dirs": "^0.1.1"
+      }
+    },
     "resolve-url": {
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/resolve-url/-/resolve-url-0.2.1.tgz",
diff --git a/package.json b/package.json
index 259a055..701fa69 100644
--- a/package.json
+++ b/package.json
@@ -29,8 +29,11 @@
     "@babel/core": "7.7.*",
     "@babel/node": "7.7.*",
     "@babel/preset-env": "7.7.*",
+    "@commitlint/cli": "^8.0.0",
+    "@commitlint/config-conventional": "^8.0.0",
     "@types/jest": "^24.0.25",
     "babel-jest": "^24.9.0",
+    "conventional-changelog": "^3.1.8",
     "conventional-changelog-cli": "^2.0.31",
     "eslint": "^5.16.0",
     "eslint-config-standard": "^12.0.0",
@@ -53,7 +56,7 @@
   },
   "husky": {
     "hooks": {
-      "pre-commit": "lint-staged"
+      "commit-msg": "commitlint -E HUSKY_GIT_PARAMS && lint-staged"
     }
   },
   "lint-staged": {