diff --git a/bin/cmd.generate.js b/bin/cmd.generate.js
deleted file mode 100644
index af6e96c..0000000
--- a/bin/cmd.generate.js
+++ /dev/null
@@ -1,86 +0,0 @@
-const path = require('path');
-const fs = require('fs');
-const linter = require('./linter');
-const prompt = require('./prompt');
-const os = require('os')
-
-const it_root_questions = [
-    { question: 'Service name', name: 'name', validator: linter.regex.NAME_REGEX, error: "Name must only contain lowercase letters, numbers or '-_'!" },
-    { question: 'Service description', name: 'description', validator: linter.regex.DESCRIPTION_REGEX, error: "Description must be a descriptive sentence starting with a uppercase letter and ending with a '.'!" },
-    { question: 'Template', name: 'template', default: defaultTemplatePath},
-    { question: 'Output', name: 'output', default: results => defaultOutputPath(results.name) },
-    { question: 'Namespace', name: 'namespace' },
-    { question: 'Base URL', name: 'base_url'}
-];
-
-function userTemplatePath(name) {
-    let templatePath = path.join(os.homedir(), '.api', 'templates', name)
-    if(fs.existsSync(templatePath)) {
-        return templatePath;
-    }
-    return false;
-}
-
-function defaultTemplatePath() {
-    return userTemplatePath('default.json') ||  path.join(__dirname, '..', 'templates', 'default.json')
-}
-
-function defaultOutputPath(name) {
-    return path.join(process.cwd(), `${name}.json`)
-}
-
-
-function doInteractiveGeneration(args) {
-    prompt.start([
-        ...it_root_questions
-    ], results => {
-        generateTemplate(results);
-    });
-
-}
-
-function doSilentGeneration(args) {
-    let config = {};
-    config.template = args.template || defaultTemplatePath();
-    config.name = args.name;
-    config.description = args.description;
-    config.output = args.output || defaultOutputPath(args.name) 
-    config.namespace = args.namespace || undefined
-    config.base_url = args.base_url || undefined
-    config.info = userTemplatePath('info.json') || undefined
-
-    generateTemplate(config);
-}
-
-function generateTemplate(config) {
-    console.log(`Generate Service Spec for service '${config.name}' to ${config.output}`)
-    let template = require(config.template);
-
-    template.name = config.name
-    template.description = config.description
-    template.namespace = config.namespace
-    template.base_url = config.base_url
-
-    if(config.info) {
-        template.info = require(config.info)
-    }
-
-    let messages = linter.lint(template);
-    if(messages.length) {
-        console.error("Failed to generate service spec:");
-        messages.forEach(message => console.log(`\t${message}`));
-        process.exit(-1)
-    }
-
-    let output = JSON.stringify(template, null, '\t');
-    fs.writeFileSync(config.output, output);
-}
-
-
-module.exports = function(args) {
-    if(args.silent) {
-        return doSilentGeneration(args);
-    }
-    return doInteractiveGeneration(args);
-
-}
\ No newline at end of file
diff --git a/bin/cmd.version.js b/bin/cmd.version.js
deleted file mode 100644
index 6cfa296..0000000
--- a/bin/cmd.version.js
+++ /dev/null
@@ -1,6 +0,0 @@
-module.exports = function(args) {
-
-    let { name, description, version } = require('../package.json');
-    console.log({ name, description, version });
-
-}
\ No newline at end of file
diff --git a/bin/index.js b/bin/index.js
deleted file mode 100644
index 73f6b5e..0000000
--- a/bin/index.js
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/usr/bin/env node
-
-const path = require('path');
-const fs = require('fs');
-
-let required_command = process.argv[2]
-let args = require('args-parser')(process.argv);
-
-let cmds = fs.readdirSync(__dirname)
-            .filter(file => file.startsWith("cmd"))
-            .reduce((result, item) => {
-                let name = item.replace(/^cmd\./, '').replace(/\.js$/, '');
-                result[name] = path.join(__dirname, item);
-                return result
-            }, {})
-
-if(!cmds[required_command]) {
-    console.error(`Command '${required_command}' not found!`);
-    console.log("Available commands:")
-    Object.keys(cmds).forEach(item => console.log(`\t${item}`))
-    process.exit(-1);
-}
-
-require(cmds[required_command])(args);
\ No newline at end of file
diff --git a/bin/linter.js b/bin/linter.js
deleted file mode 100644
index 4a0053f..0000000
--- a/bin/linter.js
+++ /dev/null
@@ -1,54 +0,0 @@
-const objectPath = require('object-path');
-
-const NAME_REGEX = /^[a-z0-9_-]+$/;
-const DESCRIPTION_REGEX = /^[A-Z]{1}.+\.$/
-
-function required() {
-    return (path, input, msgs) => {
-        if(!input) {
-            msgs.push(`Property '${path}' must be set! value=${input}`)
-        }
-    }
-}
-
-function length(min, max=-1) {
-    return (path, input, msgs) => {
-        if(min > 0 && input.length < min) {
-            msgs.push(`Property '${path}' must have at least ${min} characters! actual=${input.length}`)
-        }
-        if(max > 0 && input.length > max) {
-            msgs.push(`Property '${path}' must not have more than ${max} characters! actual=${input.length}`)
-        }  
-    }
-}
-
-function regex(regex) {
-    return (path, input, msgs) => {
-        if(!input.match(regex)) {
-            msgs.push(`Property '${path}' must only comply to pattern ${regex}! value=${input}`)
-        }
-    }
-}
-
-
-const linterMappings = [
-    { path: 'name', linters: [ required(), length(4), regex(NAME_REGEX) ] },
-    { path: 'description', linters: [ required(), length(4), regex(DESCRIPTION_REGEX) ] }
-] 
-
-
-module.exports.lint = function(spec) {
-    let messages = [];
-    linterMappings.forEach(element => {
-        let value = objectPath.get(spec, element.path);
-        element.linters.forEach(linter => {
-            linter(element.path, value, messages);
-        });
-    });
-    return messages;
-}
-
-module.exports.regex = {
-    NAME_REGEX,
-    DESCRIPTION_REGEX
-}
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 59086f4..d2d24f7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -656,6 +656,11 @@
       "resolved": "https://nexus.nclazz.de/repository/npm_public/@types/uuid/-/uuid-8.3.1.tgz",
       "integrity": "sha512-Y2mHTRAbqfFkpjldbkHGY8JIzRN6XqYRliG8/24FcHm2D2PwW24fl5xMRTVGdrb7iMrwCaIEbLWerGIkXuFWVg=="
     },
+    "@ungap/promise-all-settled": {
+      "version": "1.1.2",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/@ungap/promise-all-settled/-/promise-all-settled-1.1.2.tgz",
+      "integrity": "sha512-sL/cEvJWAnClXw0wHk85/2L0G6Sj8UB0Ctc1TEMbKSsmpRosqhwj9gWgFRZSrBr2f9tiXISwNhCPmlfqUqyb9Q=="
+    },
     "@yarnpkg/core": {
       "version": "2.4.0",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/@yarnpkg/core/-/core-2.4.0.tgz",
@@ -929,6 +934,11 @@
         }
       }
     },
+    "ansi-colors": {
+      "version": "4.1.1",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/ansi-colors/-/ansi-colors-4.1.1.tgz",
+      "integrity": "sha512-JoX0apGbHaUJBNl6yF+p6JAFYZ666/hhCGKN5t9QFjbJQKUU/g8MNbFDbvfrgKXvI1QpZplPOnwIo99lX/AAmA=="
+    },
     "ansi-escapes": {
       "version": "3.2.0",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/ansi-escapes/-/ansi-escapes-3.2.0.tgz",
@@ -957,6 +967,15 @@
       "resolved": "https://nexus.nclazz.de/repository/npm_public/any-promise/-/any-promise-1.3.0.tgz",
       "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8="
     },
+    "anymatch": {
+      "version": "3.1.2",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/anymatch/-/anymatch-3.1.2.tgz",
+      "integrity": "sha512-P43ePfOAIupkguHUycrc4qJ9kz8ZiuOUijaETwX7THt0Y/GNK7v0aa8rY816xWjZ7rJdA5XdMcpVFTKMq+RvWg==",
+      "requires": {
+        "normalize-path": "^3.0.0",
+        "picomatch": "^2.0.4"
+      }
+    },
     "aproba": {
       "version": "1.2.0",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/aproba/-/aproba-1.2.0.tgz",
@@ -1031,6 +1050,11 @@
       "resolved": "https://nexus.nclazz.de/repository/npm_public/assert-plus/-/assert-plus-1.0.0.tgz",
       "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
     },
+    "assertion-error": {
+      "version": "1.1.0",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/assertion-error/-/assertion-error-1.1.0.tgz",
+      "integrity": "sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw=="
+    },
     "async": {
       "version": "3.2.0",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/async/-/async-3.2.0.tgz",
@@ -1077,6 +1101,11 @@
         "tweetnacl": "0.14.5"
       }
     },
+    "binary-extensions": {
+      "version": "2.2.0",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/binary-extensions/-/binary-extensions-2.2.0.tgz",
+      "integrity": "sha512-jDctJ/IVQbZoJykoeHbhXpOlNBqGNcwXJKJog42E5HDPUwQTSdjCHdihjj0DlnheQ7blbT6dHOafNAiS8ooQKA=="
+    },
     "binjumper": {
       "version": "0.1.4",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/binjumper/-/binjumper-0.1.4.tgz",
@@ -1205,6 +1234,11 @@
         "fill-range": "7.0.1"
       }
     },
+    "browser-stdout": {
+      "version": "1.3.1",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/browser-stdout/-/browser-stdout-1.3.1.tgz",
+      "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw=="
+    },
     "browserify-zlib": {
       "version": "0.1.4",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/browserify-zlib/-/browserify-zlib-0.1.4.tgz",
@@ -1280,6 +1314,19 @@
       "resolved": "https://nexus.nclazz.de/repository/npm_public/caseless/-/caseless-0.12.0.tgz",
       "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw="
     },
+    "chai": {
+      "version": "4.3.4",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/chai/-/chai-4.3.4.tgz",
+      "integrity": "sha512-yS5H68VYOCtN1cjfwumDSuzn/9c+yza4f3reKXlE5rUg7SFcCEy90gJvydNgOYtblyf4Zi6jIWRnXOgErta0KA==",
+      "requires": {
+        "assertion-error": "^1.1.0",
+        "check-error": "^1.0.2",
+        "deep-eql": "^3.0.1",
+        "get-func-name": "^2.0.0",
+        "pathval": "^1.1.1",
+        "type-detect": "^4.0.5"
+      }
+    },
     "chalk": {
       "version": "2.4.2",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/chalk/-/chalk-2.4.2.tgz",
@@ -1331,11 +1378,31 @@
       "resolved": "https://nexus.nclazz.de/repository/npm_public/chardet/-/chardet-0.7.0.tgz",
       "integrity": "sha512-mT8iDcrh03qDGRRmoA2hmBJnxpllMR+0/0qlzjqZES6NdiWDcZkCNAk4rPFZ9Q85r27unkiNNg8ZOiwZXBHwcA=="
     },
+    "check-error": {
+      "version": "1.0.2",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/check-error/-/check-error-1.0.2.tgz",
+      "integrity": "sha1-V00xLt2Iu13YkS6Sht1sCu1KrII="
+    },
     "child-process": {
       "version": "1.0.2",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/child-process/-/child-process-1.0.2.tgz",
       "integrity": "sha1-mJdNx+0e5MYin44wX6cxOmiFp/I="
     },
+    "chokidar": {
+      "version": "3.5.2",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/chokidar/-/chokidar-3.5.2.tgz",
+      "integrity": "sha512-ekGhOnNVPgT77r4K/U3GDhu+FQ2S8TnK/s2KbIGXi0SZWuwkZ2QNyfWdZW+TVfn84DpEP7rLeCt2UI6bJ8GwbQ==",
+      "requires": {
+        "anymatch": "~3.1.2",
+        "braces": "~3.0.2",
+        "fsevents": "~2.3.2",
+        "glob-parent": "~5.1.2",
+        "is-binary-path": "~2.1.0",
+        "is-glob": "~4.0.1",
+        "normalize-path": "~3.0.0",
+        "readdirp": "~3.6.0"
+      }
+    },
     "chownr": {
       "version": "2.0.0",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/chownr/-/chownr-2.0.0.tgz",
@@ -1384,6 +1451,56 @@
       "resolved": "https://nexus.nclazz.de/repository/npm_public/clipanion/-/clipanion-2.6.2.tgz",
       "integrity": "sha512-0tOHJNMF9+4R3qcbBL+4IxLErpaYSYvzs10aXuECDbZdJOuJHdagJMAqvLdeaUQTI/o2uSCDRpet6ywDiKOAYw=="
     },
+    "cliui": {
+      "version": "7.0.4",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/cliui/-/cliui-7.0.4.tgz",
+      "integrity": "sha512-OcRE68cOsVMXp1Yvonl/fzkQOyjLSu/8bhPDfQt0e0/Eb283TKP20Fs2MqoPsr9SwA595rRCA+QMzYc9nBP+JQ==",
+      "requires": {
+        "string-width": "^4.2.0",
+        "strip-ansi": "^6.0.0",
+        "wrap-ansi": "^7.0.0"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "5.0.0",
+          "resolved": "https://nexus.nclazz.de/repository/npm_public/ansi-regex/-/ansi-regex-5.0.0.tgz",
+          "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg=="
+        },
+        "is-fullwidth-code-point": {
+          "version": "3.0.0",
+          "resolved": "https://nexus.nclazz.de/repository/npm_public/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
+          "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg=="
+        },
+        "string-width": {
+          "version": "4.2.2",
+          "resolved": "https://nexus.nclazz.de/repository/npm_public/string-width/-/string-width-4.2.2.tgz",
+          "integrity": "sha512-XBJbT3N4JhVumXE0eoLU9DCjcaF92KLNqTmFCnG1pf8duUxFGwtP6AD6nkjw9a3IdiRtL3E2w3JDiE/xi3vOeA==",
+          "requires": {
+            "emoji-regex": "^8.0.0",
+            "is-fullwidth-code-point": "^3.0.0",
+            "strip-ansi": "^6.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "6.0.0",
+          "resolved": "https://nexus.nclazz.de/repository/npm_public/strip-ansi/-/strip-ansi-6.0.0.tgz",
+          "integrity": "sha512-AuvKTrTfQNYNIctbR1K/YGTR1756GycPsg7b9bdV9Duqur4gv6aKqHXah67Z8ImS7WEz5QVcOtlfW2rZEugt6w==",
+          "requires": {
+            "ansi-regex": "^5.0.0"
+          }
+        },
+        "wrap-ansi": {
+          "version": "7.0.0",
+          "resolved": "https://nexus.nclazz.de/repository/npm_public/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
+          "integrity": "sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==",
+          "requires": {
+            "ansi-styles": "^4.0.0",
+            "string-width": "^4.1.0",
+            "strip-ansi": "^6.0.0"
+          }
+        }
+      }
+    },
     "clone": {
       "version": "1.0.4",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/clone/-/clone-1.0.4.tgz",
@@ -1500,6 +1617,11 @@
         "ms": "2.1.2"
       }
     },
+    "decamelize": {
+      "version": "4.0.0",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/decamelize/-/decamelize-4.0.0.tgz",
+      "integrity": "sha512-9iE1PgSik9HeIIw2JO94IidnE3eBoQrFJ3w7sFuzSX4DpmZ3v5sZpUiV5Swcf6mQEF+Y0ru8Neo+p+nyh2J+hQ=="
+    },
     "decompress-response": {
       "version": "6.0.0",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/decompress-response/-/decompress-response-6.0.0.tgz",
@@ -1515,6 +1637,14 @@
         }
       }
     },
+    "deep-eql": {
+      "version": "3.0.1",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/deep-eql/-/deep-eql-3.0.1.tgz",
+      "integrity": "sha512-+QeIQyN5ZuO+3Uk5DYh6/1eKO0m0YmJFGNmFHGACpf1ClL1nmlV/p4gNgbl2pJGxgXb4faqo6UE+M5ACEMyVcw==",
+      "requires": {
+        "type-detect": "^4.0.0"
+      }
+    },
     "deep-extend": {
       "version": "0.6.0",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/deep-extend/-/deep-extend-0.6.0.tgz",
@@ -1708,6 +1838,11 @@
       "resolved": "https://nexus.nclazz.de/repository/npm_public/es6-error/-/es6-error-4.1.1.tgz",
       "integrity": "sha512-Um/+FxMr9CISWh0bi5Zv0iOD+4cFh5qLeks1qhAopKVAJw3drgKbKySikp7wGhDL0HPeaja0P5ULZrxLkniUVg=="
     },
+    "escalade": {
+      "version": "3.1.1",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/escalade/-/escalade-3.1.1.tgz",
+      "integrity": "sha512-k0er2gUkLf8O0zKJiAhmkTnJlTvINGv7ygDNPbeIsX/TJjGJZHuh9B2UxbsaEkmlEo9MfhrSzmhIlhRlI2GXnw=="
+    },
     "escape-goat": {
       "version": "2.1.1",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/escape-goat/-/escape-goat-2.1.1.tgz",
@@ -1829,6 +1964,20 @@
         "to-regex-range": "5.0.1"
       }
     },
+    "find-up": {
+      "version": "5.0.0",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/find-up/-/find-up-5.0.0.tgz",
+      "integrity": "sha512-78/PXT1wlLLDgTzDs7sjq9hzz0vXD+zn+7wypEe4fXQxCmdmqfGsEPQxmiCSQI3ajFV91bVSsvNtrJRiW6nGng==",
+      "requires": {
+        "locate-path": "^6.0.0",
+        "path-exists": "^4.0.0"
+      }
+    },
+    "flat": {
+      "version": "5.0.2",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/flat/-/flat-5.0.2.tgz",
+      "integrity": "sha512-b6suED+5/3rTpUBdG1gupIl8MPFCAMA0QXwmljLhvCUKcUvdE4gWky9zpuGCcXHOsz4J9wPGNWq6OKpmIzz3hQ=="
+    },
     "follow-redirects": {
       "version": "1.14.1",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/follow-redirects/-/follow-redirects-1.14.1.tgz",
@@ -1867,6 +2016,12 @@
       "resolved": "https://nexus.nclazz.de/repository/npm_public/fs.realpath/-/fs.realpath-1.0.0.tgz",
       "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8="
     },
+    "fsevents": {
+      "version": "2.3.2",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/fsevents/-/fsevents-2.3.2.tgz",
+      "integrity": "sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==",
+      "optional": true
+    },
     "function-bind": {
       "version": "1.1.1",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/function-bind/-/function-bind-1.1.1.tgz",
@@ -1888,6 +2043,16 @@
         "wide-align": "1.1.3"
       }
     },
+    "get-caller-file": {
+      "version": "2.0.5",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/get-caller-file/-/get-caller-file-2.0.5.tgz",
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+    "nanoid": {
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+      "resolved": "https://nexus.nclazz.de/repository/npm_public/nanoid/-/nanoid-3.1.23.tgz",
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@@ -2843,6 +3142,11 @@
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@@ -3060,6 +3364,24 @@
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+      "resolved": "https://nexus.nclazz.de/repository/npm_public/p-locate/-/p-locate-5.0.0.tgz",
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+          "requires": {
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@@ -3213,6 +3535,11 @@
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+      "resolved": "https://nexus.nclazz.de/repository/npm_public/path-exists/-/path-exists-4.0.0.tgz",
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@@ -3397,6 +3729,14 @@
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+      "requires": {
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@@ -3436,6 +3776,14 @@
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+      "requires": {
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@@ -3484,6 +3832,11 @@
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@@ -3622,6 +3975,14 @@
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@@ -4952,6 +5317,11 @@
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       "resolved": "https://nexus.nclazz.de/repository/npm_public/yallist/-/yallist-4.0.0.tgz",
@@ -5080,6 +5455,78 @@
       "version": "0.3.0",
       "resolved": "https://nexus.nclazz.de/repository/npm_public/yaml-js/-/yaml-js-0.3.0.tgz",
       "integrity": "sha512-JbTUdsPiCkOyz+JOSqAVc19omTnUBnBQglhuclYov5HpWbEOz8y+ftqWjiMa9Pe/eF/dmCUeNgVs/VWg53GlgQ=="
+    },
+    "yargs": {
+      "version": "16.2.0",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/yargs/-/yargs-16.2.0.tgz",
+      "integrity": "sha512-D1mvvtDG0L5ft/jGWkLpG1+m0eQxOfaBvTNELraWj22wSVUMWxZUvYgJYcKh6jGGIkJFhH4IZPQhR4TKpc8mBw==",
+      "requires": {
+        "cliui": "^7.0.2",
+        "escalade": "^3.1.1",
+        "get-caller-file": "^2.0.5",
+        "require-directory": "^2.1.1",
+        "string-width": "^4.2.0",
+        "y18n": "^5.0.5",
+        "yargs-parser": "^20.2.2"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "5.0.0",
+          "resolved": "https://nexus.nclazz.de/repository/npm_public/ansi-regex/-/ansi-regex-5.0.0.tgz",
+          "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg=="
+        },
+        "is-fullwidth-code-point": {
+          "version": "3.0.0",
+          "resolved": "https://nexus.nclazz.de/repository/npm_public/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
+          "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg=="
+        },
+        "string-width": {
+          "version": "4.2.2",
+          "resolved": "https://nexus.nclazz.de/repository/npm_public/string-width/-/string-width-4.2.2.tgz",
+          "integrity": "sha512-XBJbT3N4JhVumXE0eoLU9DCjcaF92KLNqTmFCnG1pf8duUxFGwtP6AD6nkjw9a3IdiRtL3E2w3JDiE/xi3vOeA==",
+          "requires": {
+            "emoji-regex": "^8.0.0",
+            "is-fullwidth-code-point": "^3.0.0",
+            "strip-ansi": "^6.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "6.0.0",
+          "resolved": "https://nexus.nclazz.de/repository/npm_public/strip-ansi/-/strip-ansi-6.0.0.tgz",
+          "integrity": "sha512-AuvKTrTfQNYNIctbR1K/YGTR1756GycPsg7b9bdV9Duqur4gv6aKqHXah67Z8ImS7WEz5QVcOtlfW2rZEugt6w==",
+          "requires": {
+            "ansi-regex": "^5.0.0"
+          }
+        }
+      }
+    },
+    "yargs-parser": {
+      "version": "20.2.4",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/yargs-parser/-/yargs-parser-20.2.4.tgz",
+      "integrity": "sha512-WOkpgNhPTlE73h4VFAFsOnomJVaovO8VqLDzy5saChRBFQFBoMYirowyW+Q9HB4HFF4Z7VZTiG3iSzJJA29yRA=="
+    },
+    "yargs-unparser": {
+      "version": "2.0.0",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/yargs-unparser/-/yargs-unparser-2.0.0.tgz",
+      "integrity": "sha512-7pRTIA9Qc1caZ0bZ6RYRGbHJthJWuakf+WmHK0rVeLkNrrGhfoabBNdue6kdINI6r4if7ocq9aD/n7xwKOdzOA==",
+      "requires": {
+        "camelcase": "^6.0.0",
+        "decamelize": "^4.0.0",
+        "flat": "^5.0.2",
+        "is-plain-obj": "^2.1.0"
+      },
+      "dependencies": {
+        "camelcase": {
+          "version": "6.2.0",
+          "resolved": "https://nexus.nclazz.de/repository/npm_public/camelcase/-/camelcase-6.2.0.tgz",
+          "integrity": "sha512-c7wVvbw3f37nuobQNtgsgG9POC9qMbNuMQmTCqZv23b6MIz0fcYpBiOlv9gEN/hdLdnZTDQhg6e9Dq5M1vKvfg=="
+        }
+      }
+    },
+    "yocto-queue": {
+      "version": "0.1.0",
+      "resolved": "https://nexus.nclazz.de/repository/npm_public/yocto-queue/-/yocto-queue-0.1.0.tgz",
+      "integrity": "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q=="
     }
   }
 }
diff --git a/package.json b/package.json
index 9b0d270..4c2b411 100644
--- a/package.json
+++ b/package.json
@@ -2,11 +2,14 @@
   "name": "@nclazz/apicli",
   "version": "1.0.1",
   "description": "Commandline interface for generating and linting api-specs.",
-  "main": "./bin/index.js",
-  "bin": "./bin/index.js",
+  "main": "./src/index.js",
+  "bin": "./src/index.js",
   "publishConfig": {
     "registry": "https://nexus.nclazz.de/repository/npm_releases/"
   },
+  "scripts": {
+    "test": "mocha ./tests"
+  },
   "keywords": [
     "api",
     "apispec",
@@ -17,6 +20,8 @@
   "license": "MIT",
   "dependencies": {
     "args-parser": "1.2.0",
+    "chai": "^4.3.4",
+    "mocha": "^9.0.2",
     "npm-cli-login": "0.1.1",
     "object-path": "0.11.5",
     "readline": "1.3.0"
diff --git a/src/cmd/cmd.gen.js b/src/cmd/cmd.gen.js
new file mode 100644
index 0000000..0cf9040
--- /dev/null
+++ b/src/cmd/cmd.gen.js
@@ -0,0 +1,138 @@
+const path = require('path')
+const fs = require('fs')
+const os = require('os')
+const linter = require('../linter')
+
+const internal_templates = [
+    'default.json',
+    'info.json',
+    'annotations.json'
+]
+
+function prepareUserDir(config) {
+    console.trace('cmd.gen.prepareUserDir')
+    let user = {}
+    let apicli_dir = path.join(os.homedir(), '.apicli')
+    user.dir = apicli_dir
+    user.templatedir = path.join(apicli_dir, 'templates')
+    user.template = (name) => path.join(user.templatedir, name)
+
+    if(!fs.existsSync(apicli_dir)) {
+        console.debug(`Create user directory at ${apicli_dir}`)
+        fs.mkdirSync(user.templatedir, { recursive: true })
+    }
+    internal_templates.forEach(template_name => {
+        console.debug('Copy template files to user dir')
+        let local_path = path.join(__dirname, '..', '..', 'templates', template_name)
+        let target_path = user.template(template_name)
+        if(!fs.existsSync(target_path)) {
+            console.trace(`Copy ${local_path} to ${target_path}`)
+            fs.copyFileSync(local_path, target_path)
+        }
+    })
+    config.user = user
+}
+
+function prepareData(config) {
+    console.trace('cmd.gen.prepareData')
+    let data = {}
+    let templates = {}
+
+    data.name = config.args.name || undefined
+    data.description = config.args.description || undefined
+    data.base_url = config.args.baseurl || undefined
+    data.namespace = config.args.namespace || undefined
+
+    templates.base = config.args.template || config.user.template('default.json')
+    templates.info = config.args.info || config.user.template('info.json')
+    templates.annotations = config.args.annotations || config.user.template('annotations.json')
+    
+    config.output = config.args.out || path.join(process.cwd(), `${data.name}.json`)
+
+    config.data = data
+    config.templates = templates
+}
+
+function checkPreconditions(config) {
+    console.trace('gen.cmd.checkPreconditions')
+    if(!config.data.name) {
+        throw `Name must not be empty!`
+    }
+    if(!config.data.description) {
+        throw `Description must not be empty!`
+    }
+}
+
+function generateTemplate(config) {
+    console.trace('cmd.gen.generateTemplate')
+    console.log(`Generate Service spec for service ${config.data.name} to ${config.output}`)
+
+    let template = require(config.templates.base)
+    let info = require(config.templates.info)
+    let annotations = require(config.templates.annotations)
+
+    template = {
+        ...template,
+        ...config.data,
+        info,
+        annotations
+    }
+
+    console.trace(template)
+    return template   
+}
+
+function writeToFile(config, template) {
+    console.trace('cmd.gen.writeToFile')
+    console.debug(`Write to ${config.output}`)
+
+    fs.writeFileSync(config.output, JSON.stringify(template, null, '\t'))
+}
+
+function prepare(config) {
+    console.trace('cmd.gen.prepare')
+    prepareUserDir(config)
+    prepareData(config)
+    checkPreconditions(config)
+    console.trace('config:', config)
+    return config
+}
+
+
+
+module.exports = {
+    description: 'Generate a new api spec from a template.',
+    usage: {
+        options: {
+            '--interactive, -i': 'Interactive mode. Generate spec with interactive input from user. (optional)',
+            '--name <name>': 'Name of the service.',
+            '--description <description>': 'Description of the service.',
+            '--namespace <namespace>': 'Namespace of the service. (optional)',
+            '--baseurl <baseurl>': 'Base URL of the service. (optional)',
+            '--store-default': 'Store the generated spec as new user template. (optional)',
+            '--template <template-path>': 'Path to a template spec to use for generation. (optional)',
+            '--info <info-path>': "Path to an info template. (optional)",
+            '--annotations <annotations-path>': "Path to an annotations template. (optional)",
+            '--out <output-path>': "Path to output the generated template. (optional)",
+            '--quiet, -q': "Do not create the spec file, just output it to stdout. (optional)",
+            '--skip-linting': "Skip the linting process. (optional)"
+        }
+    },
+    run(args) {
+        let config = prepare({ args })
+        let spec = generateTemplate(config)
+
+        if(!args['skip-linting']) {
+            if(!linter.lint(spec).success) {
+                throw 'Lintin Error!'
+            }
+        }
+
+        if(!args.q && !args.quiet) {
+            writeToFile(config, spec)
+        }
+
+        return spec
+    }
+
+}
\ No newline at end of file
diff --git a/src/cmd/cmd.lint.js b/src/cmd/cmd.lint.js
new file mode 100644
index 0000000..fc6eac2
--- /dev/null
+++ b/src/cmd/cmd.lint.js
@@ -0,0 +1,22 @@
+const linter = require('../linter')
+const path = require('path')
+
+module.exports = {
+    run(args) {
+        if(!args.spec) {
+            throw 'No spec provided!'
+        }
+
+        let spec = require(path.resolve(process.cwd(), args.spec))
+        let result = linter.lint(spec)
+        if(!result.success) {
+            console.error('Errors while linting!')
+            process.exit(-1)
+        }
+    },
+    usage: {
+        options: {
+            '--spec <spec-path>': "path to the api spec to lint."
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/cmd/cmd.version.js b/src/cmd/cmd.version.js
new file mode 100644
index 0000000..1e97606
--- /dev/null
+++ b/src/cmd/cmd.version.js
@@ -0,0 +1,14 @@
+function printVersion(verbose) {
+    let { version, description, name } = require('../../package.json');
+    console.log({ name, description, version });
+}
+
+function run(args) {
+    return printVersion(args.v || args.verbose)
+}
+
+module.exports = {
+    name: 'version',
+    description: 'Output the current version of apicli.',
+    run,
+}
\ No newline at end of file
diff --git a/src/index.js b/src/index.js
new file mode 100644
index 0000000..2669fd8
--- /dev/null
+++ b/src/index.js
@@ -0,0 +1,22 @@
+#!/usr/bin/env node
+const logging = require('./logging')
+const loader = require('./loader')
+
+let required_command = process.argv[2]
+let args = require('args-parser')(process.argv);
+let commands = loader.load()
+let command = commands[required_command]
+
+if(!command) {
+    console.error(`Command '${required_command}' not found!`);
+    command = commands.help
+}
+
+logging.init(args.v ? 1 : args.vv ? 2 : 0)
+
+try {
+    command.run(args)
+}catch(err) {
+    console.error(`\n[error] ${err}`)
+    command.printUsage(command)
+}
diff --git a/src/linter.js b/src/linter.js
new file mode 100644
index 0000000..29aca58
--- /dev/null
+++ b/src/linter.js
@@ -0,0 +1,86 @@
+const objectPath = require('object-path');
+const utils = require('./utils')
+
+const NAME_REGEX = /^[a-z0-9_-]+$/;
+const DESCRIPTION_REGEX = /^[A-Z]{1}.+\.$/
+
+function required() {
+    return (path, input) => {
+        input = input && input.trim()
+        if(!input) {
+            return `Property '${path}' must be set! value=${input}`
+        }
+    }
+}
+
+function length(opts) {
+    return (path, input) => {
+        input = input && input.trim() || ''
+        if(opts.min && input.length < opts.min) {
+            return `Property '${path}' must have at least ${opts.min} characters! actual=${input.length}`
+        }
+        if(opts.max  && input.length > opts.max) {
+            return `Property '${path}' must not have more than ${opts.max} characters! actual=${input.length}`
+        }  
+    }
+}
+
+function regex(regex) {
+    return (path, input, msgs) => {
+        input = input && input.trim()
+        if(!input.match(regex)) {
+            return `Property '${path}' must comply to pattern ${regex}! value=${input}`
+        }
+    }
+}
+
+
+const linterMappings = [
+    { 
+        path: 'name', 
+        linters: [ 
+            { label: 'is set', validator: required() }, 
+            { label: 'has at least 4 characters', validator: length({ min: 4 }) }, 
+            { label: 'format is valid', validator: regex(NAME_REGEX) } 
+        ] 
+    },
+    { 
+        path: 'description', 
+        linters: [ 
+            { label: 'is set', validator: required() }, 
+            { label: 'has at least 4 characters', validator: length({ min: 4 }) }, 
+            { label: 'format is valid', validator: regex(DESCRIPTION_REGEX) }  
+        ] 
+    }
+] 
+
+
+module.exports.lint = function(spec) {
+    let results = {
+        success: true
+    }
+    linterMappings.forEach(element => {
+        let value = objectPath.get(spec, element.path);
+        element.linters.forEach(linter => {
+            let msg = linter.validator(element.path, value)
+            if(msg) {
+                results.success = false
+            }
+            msg = msg || 'OK'
+            results[element.path] = msg;
+            console.log(utils.formatColumns(utils.formatColumns(element.path, linter.label, 12), msg))
+        });
+    });
+    return results;
+}
+
+module.exports.regex = {
+    NAME_REGEX,
+    DESCRIPTION_REGEX
+}
+
+module.exports.validators = {
+    required,
+    length,
+    regex,
+}
\ No newline at end of file
diff --git a/src/loader.js b/src/loader.js
new file mode 100644
index 0000000..0e29a82
--- /dev/null
+++ b/src/loader.js
@@ -0,0 +1,63 @@
+const fs = require('fs')
+const path = require('path')
+const utils = require('./utils')
+
+const default_options = {
+    '-v': 'Verbose output level=debug.',
+    '-vv': 'Verbose output level=trace.'
+}
+
+function printCommandUsage(command) {
+    if(command.name === '?' || command.name === 'help') {
+        return
+    }
+    console.log(`\n[${command.name}]\n${command.description || ''}`)
+    if(command.usage && command.usage.options) {
+        Object.entries(command.usage.options)
+            .forEach(entry => console.log(`\t ${utils.formatColumns(entry[0], entry[1], 48, '.')}`))
+    }   
+}
+
+
+function printCompleteUsage(commands) {
+    Object.values(commands).sort((a, b) => a.name.localeCompare(b.name)).forEach(printCommandUsage)
+}
+
+function load() {
+
+    let commands = fs.readdirSync(path.join(__dirname, 'cmd'))
+            .filter(file => file.startsWith("cmd"))
+            .reduce((result, item) => {
+                let name = item.replace(/^cmd\./, '').replace(/\.js$/, '');
+                let command_path = path.join(__dirname, 'cmd', item); 
+                let command = require(command_path)
+                
+                command.name = result.name || name
+                command.usage = command.usage || {}
+                command.usage.options = command.usage.options || {}
+                command.usage.options = {
+                    ...command.usage.options,
+                    ... default_options
+                }
+                command.printUsage = () => printCommandUsage(command)
+                let run_command = command.run
+                command.run = (args) => {
+                    if(args['?'] || args.help) {
+                        printCommandUsage(command)
+                        return
+                    }
+                    return run_command(args)
+                }
+
+                result[name] = command
+                return result
+            }, {})
+
+    commands.help = { name: 'help', run: () => printCompleteUsage(commands) }
+    commands['?'] = { name: '?', run: () => printCompleteUsage(commands) }
+
+
+    return commands
+}
+
+module.exports.load = load
\ No newline at end of file
diff --git a/src/logging.js b/src/logging.js
new file mode 100644
index 0000000..21a38e2
--- /dev/null
+++ b/src/logging.js
@@ -0,0 +1,10 @@
+function log(logger, prefix, data) {
+    logger(`[${prefix}]`, ...data)
+}
+
+
+module.exports.init = (loglevel) => {
+    console.log = loglevel >= 0 ? console.log: () => {}
+    console.debug = loglevel >= 1 ? function() { log(console.log, 'debug', arguments) } : () => {}
+    console.trace = loglevel >= 2 ? function() { log(console.log, 'trace', arguments) } : () => {}
+}
\ No newline at end of file
diff --git a/bin/prompt.js b/src/prompt.js
similarity index 100%
rename from bin/prompt.js
rename to src/prompt.js
diff --git a/src/utils.js b/src/utils.js
new file mode 100644
index 0000000..2c6dd92
--- /dev/null
+++ b/src/utils.js
@@ -0,0 +1,9 @@
+module.exports.formatColumns = (left, right, size=48, symbol=' ') =>  {
+    let indent = size - left.length
+    let result = left + '  ';
+    for(let i = 0; i < indent; i++) {
+        result += symbol
+    }
+    result += '  ' + right
+    return result
+}
\ No newline at end of file
diff --git a/templates/annotations.json b/templates/annotations.json
new file mode 100644
index 0000000..fc2241e
--- /dev/null
+++ b/templates/annotations.json
@@ -0,0 +1,5 @@
+{
+    "personal_data": {
+        "description": "Identifies a field that contains Personal Data, as defined by GDPR."
+    }
+}
\ No newline at end of file
diff --git a/templates/default.json b/templates/default.json
index 06028ec..e339a74 100644
--- a/templates/default.json
+++ b/templates/default.json
@@ -1,6 +1,6 @@
 {
   "name": "",
-  "description": "Common resources to be implemented by all other services. This spec can be used as a template for other services.",
+  "description": "",
   "info": {},
   "imports": [],
   "headers": [],
diff --git a/templates/info.json b/templates/info.json
new file mode 100644
index 0000000..49872c8
--- /dev/null
+++ b/templates/info.json
@@ -0,0 +1,4 @@
+{
+    "contact": {},
+    "license": {}
+}
\ No newline at end of file
diff --git a/tests/cmd.gen.test.js b/tests/cmd.gen.test.js
new file mode 100644
index 0000000..c906966
--- /dev/null
+++ b/tests/cmd.gen.test.js
@@ -0,0 +1,84 @@
+const assert = require('assert').strict
+const loader = require('../src/loader')
+const logging = require('../src/logging')
+const expect = require('chai').expect
+const fs = require('fs')
+const path = require('path')
+
+logging.init(-1)
+const commands = loader.load()
+
+
+describe("gen command", () => {
+
+    const test_spec = { 
+        name: 'test-service', 
+        description: 'Description for service.',
+        baseurl: 'https://nclazz.de',
+        namespace: 'de.nclazz' ,
+        quiet: true
+    }
+
+    it('throws an error on missing name', () => {
+        expect(() => commands.gen.run({ quiet: true })).to.throw('Name must not be empty!')
+    })
+    it('throws an error on missing description', () => {
+        expect(() => commands.gen.run({ name: 'testename', quiet: true })).to.throw('Description must not be empty!')
+    })
+    it('generates a spec', () => {
+        let spec = commands.gen.run(test_spec); 
+        expect(spec).to.not.equal(null)
+        expect(spec).to.not.equal(undefined)
+        expect(spec).to.not.equal({})
+    })
+    it('includes [name, description, base_url, namespace] as top level properties', () => {
+        let spec = commands.gen.run(test_spec); 
+        expect(spec).to.have.ownProperty('name')
+        expect(spec).to.have.ownProperty('description')
+        expect(spec).to.have.ownProperty('base_url')
+        expect(spec).to.have.ownProperty('namespace')
+    })
+    it('correctly propagates [name, description, base_url, namespace] to spec', () => {
+        let spec = commands.gen.run(test_spec); 
+        expect(spec.name).to.equal('test-service')
+        expect(spec.description).to.equal('Description for service.')
+        expect(spec.base_url).to.equal('https://nclazz.de')
+        expect(spec.namespace).to.equal('de.nclazz')
+    })
+    it('does not creates a file in quiet mode', () => {
+        let spec = commands.gen.run({
+            ...test_spec,
+            out: './test-spec.json'
+        }); 
+        expect(fs.existsSync('./test-spec.json')).to.equal(false)
+    })
+    it('creates a file with valid json spec', () => {
+        let spec_path = path.join(__dirname, 'test-spec.json')
+        commands.gen.run({
+            ...test_spec,
+            out: spec_path,
+            quiet: false
+        }); 
+        expect(fs.existsSync(spec_path)).to.equal(true)
+        let spec_json = require(spec_path) 
+        expect(spec_json).to.have.ownProperty('name')
+        expect(spec_json).to.have.ownProperty('description')
+        expect(spec_json).to.have.ownProperty('base_url')
+        expect(spec_json).to.have.ownProperty('namespace')
+        fs.unlinkSync(spec_path)
+    })
+    it('fails on invalid linting properties', () => {
+        expect(() => commands.gen.run({
+            ...test_spec,
+            name: 'Test'
+        })).to.throw()
+    })
+    it('does not fail on invalid linting properties when lintin disabled', () => {
+        expect(() => commands.gen.run({
+            ...test_spec,
+            name: 'Test',
+            'skip-linting': true
+        })).to.not.throw()
+    })
+
+})
\ No newline at end of file
diff --git a/tests/lint.test.js b/tests/lint.test.js
new file mode 100644
index 0000000..67b4556
--- /dev/null
+++ b/tests/lint.test.js
@@ -0,0 +1,53 @@
+const assert = require('assert').strict
+const logging = require('../src/logging')
+const expect = require('chai').expect
+const linter = require('../src/linter')
+
+logging.init(-1)
+
+describe('linter validators', () => {
+    it('creates an error on required property', () => {
+        expect(linter.validators.required()('path', '')).to.not.be.empty
+        expect(linter.validators.required()('path', null)).to.not.be.empty
+        expect(linter.validators.required()('path', undefined)).to.not.be.empty
+        expect(linter.validators.required()('path', '      ')).to.not.be.empty
+    })
+    it('creates an error on to small strings for length validator', () => {
+        expect(linter.validators.length({ min: 4 })('path', '')).to.not.be.empty
+        expect(linter.validators.length({ min: 4 })('path', null)).to.not.be.empty
+        expect(linter.validators.length({ min: 4 })('path', undefined)).to.not.be.empty
+        expect(linter.validators.length({ min: 4 })('path', '123')).to.not.be.empty
+    })
+    it('creates an error on too large strings for length validator', () => {
+        expect(linter.validators.length({ max: 4 })('path', '')).to.be.undefined
+        expect(linter.validators.length({ max: 4 })('path', null)).to.be.undefined
+        expect(linter.validators.length({ max: 4 })('path', undefined)).to.be.undefined
+        expect(linter.validators.length({ max: 4 })('path', '12345')).to.not.be.empty
+        expect(linter.validators.length({ max: 4 })('path', '  1     ')).to.be.undefined
+    })
+    it('creates an error when string does not match regex', () => {
+        expect(linter.validators.regex(/[0-9]+/)('path', 'abcdef')).to.not.be.empty
+        expect(linter.validators.regex(/[0-9]+/)('path', '   ')).to.not.be.empty
+        expect(linter.validators.regex(/.+/)('path', '  ')).to.not.be.empty
+    })
+})
+
+
+describe('linter for spec', () => {
+    it('fails on invalid name property', () => {
+        let result = linter.lint({
+            name: "Test",
+            description: "Test."
+        }) 
+        expect(result.success).to.equal(false)
+        expect(result.name).to.not.equal('OK')
+    })
+    it('fails on invalid description property', () => {
+        let result = linter.lint({
+            name: "test-service",
+            description: "test."
+        }) 
+        expect(result.success).to.equal(false)
+        expect(result.description).to.not.equal('OK')
+    })  
+})
\ No newline at end of file