diff --git a/packages/graphql/mixin.core.js b/packages/graphql/mixin.core.js
index 92f0f43c8..b9a3adc6f 100644
--- a/packages/graphql/mixin.core.js
+++ b/packages/graphql/mixin.core.js
@@ -1,3 +1,4 @@
+const { existsSync } = require('fs');
 const { Mixin } = require('hops-mixin');
 const strip = require('strip-indent');
 const {
@@ -109,6 +110,17 @@ class GraphQLMixin extends Mixin {
       );
     }
   }
+
+  diagnose() {
+    if (!existsSync(this.config.fragmentsFile)) {
+      return [
+        `Could not find a graphql introspection query result at "${
+          this.config.fragmentsFile
+        }".`,
+        'You might need to execute "hops graphql introspect"',
+      ];
+    }
+  }
 }
 
 module.exports = GraphQLMixin;
diff --git a/packages/graphql/mixin.server.js b/packages/graphql/mixin.server.js
index 39d774681..eafe16205 100644
--- a/packages/graphql/mixin.server.js
+++ b/packages/graphql/mixin.server.js
@@ -18,7 +18,6 @@ const {
 const fetch = require('cross-fetch');
 
 let introspectionResult = undefined;
-let warned = false;
 
 class GraphQLMixin extends Mixin {
   constructor(config, element, { graphql: options = {} } = {}) {
@@ -31,13 +30,6 @@ class GraphQLMixin extends Mixin {
         if (existsSync(config.fragmentsFile)) {
           const fileContent = readFileSync(config.fragmentsFile, 'utf-8');
           introspectionResult = JSON.parse(fileContent);
-        } else if (!warned) {
-          warned = true;
-          console.warn(
-            'Could not find a graphql introspection query result at %s.',
-            config.fragmentsFile,
-            'You might need to execute `hops graphql introspect`'
-          );
         }
       } catch (_) {
         introspectionResult = null;
diff --git a/packages/lambda/lib/aws-config.js b/packages/lambda/lib/aws-config.js
index 6ca071709..579c4889a 100644
--- a/packages/lambda/lib/aws-config.js
+++ b/packages/lambda/lib/aws-config.js
@@ -1,10 +1,7 @@
 'use strict';
 
-const semver = require('semver');
 const { trimSlashes } = require('pathifist');
 
-const MAX_NODE_VERSION = '8.10';
-
 module.exports = function getAWSConfig(hopsConfig) {
   const awsConfig = hopsConfig._aws || hopsConfig.aws || {};
 
@@ -27,48 +24,5 @@ module.exports = function getAWSConfig(hopsConfig) {
     exclude: [...(awsConfig.exclude || [])],
   };
 
-  const targetNodeVersion =
-    !hopsConfig.node || hopsConfig.node === 'current'
-      ? process.version
-      : hopsConfig.node;
-
-  if (
-    semver.gt(semver.coerce(targetNodeVersion), semver.coerce(MAX_NODE_VERSION))
-  ) {
-    console.warn(
-      'AWS Lambda only supports Node.js up to version:',
-      MAX_NODE_VERSION
-    );
-    console.warn(
-      'Please specify or use a Node.js version lower than or equal to this',
-      'version in your Hops config (hops.node) to tell Babel for which version',
-      'it should transpile for.'
-    );
-  }
-
-  if (
-    !config.domainName &&
-    config.basePath.indexOf(config.stageName) !== 0 &&
-    trimSlashes(hopsConfig.assetPath).indexOf(config.stageName) !== 0
-  ) {
-    console.warn(
-      'When no custom domain is configured, the stageName (' +
-        config.stageName +
-        ') should be the first path segment in basePath (' +
-        config.basePath +
-        ') and assetPath (' +
-        hopsConfig.assetPath +
-        ').'
-    );
-  }
-
-  if (config.domainName && !config.certificateArn) {
-    console.error(
-      'Setting a custom domain name also requires to specify the ACM',
-      'certificate ARN.'
-    );
-    process.exit(1);
-  }
-
   return config;
 };
diff --git a/packages/lambda/lib/deploy.js b/packages/lambda/lib/deploy.js
index 7b737a498..9d351d5de 100755
--- a/packages/lambda/lib/deploy.js
+++ b/packages/lambda/lib/deploy.js
@@ -3,7 +3,6 @@
 var fs = require('fs');
 var path = require('path');
 var AWS = require('aws-sdk');
-var getAWSConfig = require('./aws-config');
 var createLambdaBundle = require('./create-lambda-bundle');
 var progressWriter = require('./progress-writer');
 var fsUtils = require('./fs-utils');
@@ -140,14 +139,19 @@ function createOrUpdateStack(cloudformation, stackName, templateUrl, params) {
     });
 }
 
-module.exports = function deploy(config, options, parametersOverrides) {
-  var awsConfig = getAWSConfig(config);
-
-  if (!fs.existsSync(config.buildDir)) {
-    console.error(
-      'Could not find build directory. Please make sure that you ' +
-        'have executed "hops build" before trying to deploy your application.'
-    );
+module.exports = function deploy(
+  { hopsConfig, awsConfig },
+  options,
+  parametersOverrides,
+  logger
+) {
+  if (!fs.existsSync(hopsConfig.buildDir)) {
+    if (logger) {
+      logger.error(
+        'Could not find build directory. Please make sure that you ' +
+          'have executed "hops build" before trying to deploy your application.'
+      );
+    }
     return process.exit(1);
   }
 
@@ -173,7 +177,7 @@ module.exports = function deploy(config, options, parametersOverrides) {
 
       return Promise.all([
         createLambdaBundle(
-          config.rootDir,
+          hopsConfig.rootDir,
           zippedBundleLocation,
           awsConfig.include,
           awsConfig.exclude,
diff --git a/packages/lambda/lib/destroy.js b/packages/lambda/lib/destroy.js
index 67184dbc8..ce6a5861b 100644
--- a/packages/lambda/lib/destroy.js
+++ b/packages/lambda/lib/destroy.js
@@ -2,7 +2,6 @@
 
 var AWS = require('aws-sdk');
 var prompt = require('./prompt');
-var getAWSConfig = require('./aws-config');
 
 function emptyBucket(s3, bucketName) {
   console.log('Deleting objects in S3 bucket');
@@ -57,9 +56,7 @@ function deleteStack(cloudFormation, stackName) {
     });
 }
 
-module.exports = function destroy(config, options) {
-  var awsConfig = getAWSConfig(config);
-
+module.exports = function destroy({ awsConfig }, options, logger) {
   AWS.config.update({ region: awsConfig.region });
 
   AWS.config.apiVersions = {
diff --git a/packages/lambda/mixin.core.js b/packages/lambda/mixin.core.js
index cf0b73507..aad523cac 100644
--- a/packages/lambda/mixin.core.js
+++ b/packages/lambda/mixin.core.js
@@ -4,19 +4,35 @@ const {
     async: { callable: callableAsync },
   },
 } = require('hops-mixin');
+const { trimSlashes } = require('pathifist');
+const semver = require('semver');
 const strip = require('strip-indent');
 
+const MAX_NODE_VERSION = '8.10';
+const getAWSConfig = require('./lib/aws-config');
+
 class LambdaMixin extends Mixin {
+  constructor(config, ...args) {
+    super(config, ...args);
+
+    this.awsConfig = getAWSConfig(this.config);
+  }
+
   deployLambda(parameterOverrides) {
     return require('./lib/deploy')(
-      this.config,
+      { hopsConfig: this.config, awsConfig: this.awsConfig },
       this.options,
-      parameterOverrides
+      parameterOverrides,
+      typeof this.getLogger === 'function' ? this.getLogger() : null
     );
   }
 
   destroyLambda() {
-    return require('./lib/destroy')(this.config, this.options);
+    return require('./lib/destroy')(
+      { hopsConfig: this.config, awsConfig: this.awsConfig },
+      this.options,
+      typeof this.getLogger === 'function' ? this.getLogger() : null
+    );
   }
 
   registerCommands(yargs) {
@@ -69,6 +85,50 @@ class LambdaMixin extends Mixin {
   handleArguments(argv) {
     this.options = { ...this.options, ...argv };
   }
+
+  diagnose() {
+    const warnings = [];
+    const targetNodeVersion =
+      !this.config.node || this.config.node === 'current'
+        ? process.version
+        : this.config.node;
+
+    if (
+      semver.gt(
+        semver.coerce(targetNodeVersion),
+        semver.coerce(MAX_NODE_VERSION)
+      )
+    ) {
+      warnings.push(
+        [
+          `AWS Lambda only supports Node.js up to version: ${MAX_NODE_VERSION}.`,
+          'Please specify or use a Node.js version lower than or equal to this',
+          'version in your Hops config (hops.node) to tell Babel for which version',
+          'it should transpile for.',
+        ].join('\n')
+      );
+    }
+
+    if (
+      !this.awsConfig.domainName &&
+      this.awsConfig.basePath.indexOf(this.awsConfig.stageName) !== 0 &&
+      trimSlashes(this.config.assetPath).indexOf(this.awsConfig.stageName) !== 0
+    ) {
+      warnings.push(
+        `When no custom domain is configured, the stageName (${
+          this.awsConfig.stageName
+        }) should be the first path segment in basePath (${
+          this.awsConfig.basePath
+        }) and assetPath (${this.config.assetPath}).`
+      );
+    }
+
+    if (this.awsConfig.domainName && !this.awsConfig.certificateArn) {
+      warnings.push(
+        'Setting a custom domain name also requires to specify the ACM certificate ARN.'
+      );
+    }
+  }
 }
 
 LambdaMixin.strategies = {
diff --git a/packages/typescript/mixin.core.js b/packages/typescript/mixin.core.js
index 0972a252b..8ddec3183 100644
--- a/packages/typescript/mixin.core.js
+++ b/packages/typescript/mixin.core.js
@@ -1,3 +1,5 @@
+const { existsSync } = require('fs');
+const { join } = require('path');
 const { Mixin } = require('hops-mixin');
 
 class TypescriptMixin extends Mixin {
@@ -19,6 +21,20 @@ class TypescriptMixin extends Mixin {
     });
     webpackConfig.resolve.extensions.push('.ts', '.tsx');
   }
+
+  diagnose() {
+    const tsConfigPath = join(this.config.rootDir, 'tsconfig.json');
+    const exampleTsConfigPath = require.resolve(
+      'hops-typescript/tsconfig.json'
+    );
+    if (!existsSync(tsConfigPath)) {
+      return `No "tsconfig.json" file found in your project root directory ("${
+        this.config.rootDir
+      }").\nAs a starting point you can copy our minimal example config file: "cp ${exampleTsConfigPath} ${
+        this.config.rootDir
+      }/tsconfig.json"`;
+    }
+  }
 }
 
 module.exports = TypescriptMixin;