diff --git a/package.json b/package.json
index 8dc6fcb73814b..31ec022ab52d6 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
   "devDependencies": {
     "conventional-changelog-cli": "^2.1.1",
     "fs-extra": "^9.1.0",
-    "graceful-fs": "^4.2.5",
+    "graceful-fs": "^4.2.6",
     "jest-junit": "^12.0.0",
     "jsii-diff": "^1.20.1",
     "jsii-pacmak": "^1.20.1",
diff --git a/packages/@aws-cdk/core/.vscode/tasks.json b/packages/@aws-cdk/core/.vscode/tasks.json
new file mode 100644
index 0000000000000..3726d98503637
--- /dev/null
+++ b/packages/@aws-cdk/core/.vscode/tasks.json
@@ -0,0 +1,16 @@
+{
+	"version": "2.0.0",
+	"tasks": [
+		{
+			"type": "npm",
+			"script": "watch",
+			"problemMatcher": [
+				"$tsc-watch"
+			],
+			"group": "build",
+			"label": "npm: watch",
+			"detail": "cdk-watch",
+			"isBackground": true
+		}
+	]
+}
\ No newline at end of file
diff --git a/yarn.lock b/yarn.lock
index ab1053c15fecb..8edfd60d28959 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2048,6 +2048,11 @@ anymatch@^3.0.3:
     normalize-path "^3.0.0"
     picomatch "^2.0.4"
 
+app-root-path@^2.2.1:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/app-root-path/-/app-root-path-2.2.1.tgz#d0df4a682ee408273583d43f6f79e9892624bc9a"
+  integrity sha512-91IFKeKk7FjfmezPKkwtaRvSpnUc4gDwPAjA1YZ9Gn0q0PPeW+vbeUsZuyDwjI7+QTHhcLen2v25fi/AmhvbJA==
+
 append-transform@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/append-transform/-/append-transform-1.0.0.tgz#046a52ae582a228bd72f58acfbe2967c678759ab"
@@ -2288,7 +2293,7 @@ aws-sdk-mock@^5.1.0:
     sinon "^9.0.1"
     traverse "^0.6.6"
 
-aws-sdk@^2.637.0, aws-sdk@^2.842.0:
+aws-sdk@^2.596.0, aws-sdk@^2.637.0, aws-sdk@^2.842.0:
   version "2.842.0"
   resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.842.0.tgz#2673f72c0981c4697f8ed5dc39061cff98d9057f"
   integrity sha512-9vjVDxsLzNI79JChUgEHDUpv2obkTe35F3oGFGViKsf4C7xlOexzKOCfTRNcgzh0MON6rVDFpYBtF2LlEyDGKg==
@@ -3711,6 +3716,16 @@ dot-prop@^5.1.0:
   dependencies:
     is-obj "^2.0.0"
 
+dotenv-json@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/dotenv-json/-/dotenv-json-1.0.0.tgz#fc7f672aafea04bed33818733b9f94662332815c"
+  integrity sha512-jAssr+6r4nKhKRudQ0HOzMskOFFi9+ubXWwmrSGJFgTvpjyPXCXsCsYbjif6mXp7uxA7xY3/LGaiTQukZzSbOQ==
+
+dotenv@^8.0.0:
+  version "8.2.0"
+  resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-8.2.0.tgz#97e619259ada750eea3e4ea3e26bceea5424b16a"
+  integrity sha512-8sJ78ElpbDJBHNeBzUbUVLsqKdccaa/BXF1uPTw3GrvQTBgrQrtObr2mUrE38vzYd8cEv+m/JBfDLioYcfXoaw==
+
 dotgitignore@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/dotgitignore/-/dotgitignore-2.1.0.tgz#a4b15a4e4ef3cf383598aaf1dfa4a04bcc089b7b"
@@ -3919,6 +3934,11 @@ escodegen@^1.14.1, escodegen@^1.8.1:
   optionalDependencies:
     source-map "~0.6.1"
 
+eslint-config-standard@^14.1.1:
+  version "14.1.1"
+  resolved "https://registry.yarnpkg.com/eslint-config-standard/-/eslint-config-standard-14.1.1.tgz#830a8e44e7aef7de67464979ad06b406026c56ea"
+  integrity sha512-Z9B+VR+JIXRxz21udPTL9HpFMyoMUEeX1G251EQ6e05WD9aPVtVBn09XUmZ259wCMlCDmYDSZG62Hhm+ZTJcUg==
+
 eslint-import-resolver-node@^0.3.4:
   version "0.3.4"
   resolved "https://registry.yarnpkg.com/eslint-import-resolver-node/-/eslint-import-resolver-node-0.3.4.tgz#85ffa81942c25012d8231096ddf679c03042c717"
@@ -3946,6 +3966,14 @@ eslint-module-utils@^2.6.0:
     debug "^2.6.9"
     pkg-dir "^2.0.0"
 
+eslint-plugin-es@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-es/-/eslint-plugin-es-3.0.1.tgz#75a7cdfdccddc0589934aeeb384175f221c57893"
+  integrity sha512-GUmAsJaN4Fc7Gbtl8uOBlayo2DqhwWvEzykMHSCZHU3XdJ+NSzzZcVhXh3VxX5icqQ+oQdIEawXX8xkR3mIFmQ==
+  dependencies:
+    eslint-utils "^2.0.0"
+    regexpp "^3.0.0"
+
 eslint-plugin-import@^2.22.1:
   version "2.22.1"
   resolved "https://registry.yarnpkg.com/eslint-plugin-import/-/eslint-plugin-import-2.22.1.tgz#0896c7e6a0cf44109a2d97b95903c2bb689d7702"
@@ -3972,11 +4000,33 @@ eslint-plugin-jest@^24.1.3:
   dependencies:
     "@typescript-eslint/experimental-utils" "^4.0.1"
 
+eslint-plugin-node@^11.1.0:
+  version "11.1.0"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-node/-/eslint-plugin-node-11.1.0.tgz#c95544416ee4ada26740a30474eefc5402dc671d"
+  integrity sha512-oUwtPJ1W0SKD0Tr+wqu92c5xuCeQqB3hSCHasn/ZgjFdA9iDGNkNf2Zi9ztY7X+hNuMib23LNGRm6+uN+KLE3g==
+  dependencies:
+    eslint-plugin-es "^3.0.0"
+    eslint-utils "^2.0.0"
+    ignore "^5.1.1"
+    minimatch "^3.0.4"
+    resolve "^1.10.1"
+    semver "^6.1.0"
+
+eslint-plugin-promise@^4.2.1:
+  version "4.3.1"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-promise/-/eslint-plugin-promise-4.3.1.tgz#61485df2a359e03149fdafc0a68b0e030ad2ac45"
+  integrity sha512-bY2sGqyptzFBDLh/GMbAxfdJC+b0f23ME63FOE4+Jao0oZ3E1LEwFtWJX/1pGMJLiTtrSSern2CRM/g+dfc0eQ==
+
 eslint-plugin-rulesdir@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/eslint-plugin-rulesdir/-/eslint-plugin-rulesdir-0.1.0.tgz#ad144d7e98464fda82963eff3fab331aecb2bf08"
   integrity sha1-rRRNfphGT9qClj7/P6szGuyyvwg=
 
+eslint-plugin-standard@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-standard/-/eslint-plugin-standard-4.1.0.tgz#0c3bf3a67e853f8bbbc580fb4945fbf16f41b7c5"
+  integrity sha512-ZL7+QRixjTR6/528YNGyDotyffm5OQst/sGxKDwGb9Uqs4In5Egi4+jbobhqJoyoCM6/7v/1A5fhQ7ScMtDjaQ==
+
 eslint-scope@^5.0.0, eslint-scope@^5.1.1:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-5.1.1.tgz#e786e59a66cb92b3f6c1fb0d508aab174848f48c"
@@ -4850,10 +4900,10 @@ globby@^9.2.0:
     pify "^4.0.1"
     slash "^2.0.0"
 
-graceful-fs@^4.1.11, graceful-fs@^4.1.15, graceful-fs@^4.1.2, graceful-fs@^4.1.6, graceful-fs@^4.2.0, graceful-fs@^4.2.2, graceful-fs@^4.2.4, graceful-fs@^4.2.5:
-  version "4.2.5"
-  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.5.tgz#bc18864a6c9fc7b303f2e2abdb9155ad178fbe29"
-  integrity sha512-kBBSQbz2K0Nyn+31j/w36fUfxkBW9/gfwRWdUY1ULReH3iokVJgddZAFcD1D0xlgTmFxJCbUkUclAlc6/IDJkw==
+graceful-fs@^4.1.11, graceful-fs@^4.1.15, graceful-fs@^4.1.2, graceful-fs@^4.1.6, graceful-fs@^4.2.0, graceful-fs@^4.2.2, graceful-fs@^4.2.4, graceful-fs@^4.2.6:
+  version "4.2.6"
+  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.6.tgz#ff040b2b0853b23c3d31027523706f1885d76bee"
+  integrity sha512-nTnJ528pbqxYanhpDYsi4Rd8MAeaBA67+RZ10CM1m3bTAVFEDcd5AuA4a6W5YkGZ1iNXHzZz8T6TBKLeBuNriQ==
 
 growly@^1.3.0:
   version "1.3.0"
@@ -5103,7 +5153,7 @@ ignore@^4.0.3, ignore@^4.0.6:
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-4.0.6.tgz#750e3db5862087b4737ebac8207ffd1ef27b25fc"
   integrity sha512-cyFDKrqc/YdcWFniJhzI42+AzS+gNwmUzOSFcRCQYwySuBBBy/KjuxWLZ/FHEH6Moq1NizMOBWyTcv8O4OZIMg==
 
-ignore@^5.1.4, ignore@^5.1.8, ignore@~5.1.8:
+ignore@^5.1.1, ignore@^5.1.4, ignore@^5.1.8, ignore@~5.1.8:
   version "5.1.8"
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-5.1.8.tgz#f150a8b50a34289b33e22f5889abd4d8016f0e57"
   integrity sha512-BMpfD7PpiETpBl/A6S498BaIJ6Y/ABT93ETbby2fP00v4EbvPBXWEoaR1UBPKs3iR53pJY7EtZk5KACI57i1Uw==
@@ -5293,7 +5343,7 @@ is-ci@^2.0.0:
   dependencies:
     ci-info "^2.0.0"
 
-is-core-module@^2.1.0:
+is-core-module@^2.1.0, is-core-module@^2.2.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/is-core-module/-/is-core-module-2.2.0.tgz#97037ef3d52224d85163f5597b2b63d9afed981a"
   integrity sha512-XRAfAdyyY5F5cOXn7hYQDqh2Xmii+DEfIcQGxK/uNwMHhIkPWO0g8msXcbzLe+MpGoR951MlqM/2iIlU4vKDdQ==
@@ -6385,6 +6435,24 @@ kleur@^3.0.3:
   resolved "https://registry.yarnpkg.com/kleur/-/kleur-3.0.3.tgz#a79c9ecc86ee1ce3fa6206d1216c501f147fc07e"
   integrity sha512-eTIzlVOSUR+JxdDFepEYcBMtZ9Qqdef+rnzWdRZuMbOywu5tO2w2N7rqjoANZ5k9vywhL6Br1VRjUIgTQx4E8w==
 
+lambda-leak@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/lambda-leak/-/lambda-leak-2.0.0.tgz#771985d3628487f6e885afae2b54510dcfb2cd7e"
+  integrity sha1-dxmF02KEh/boha+uK1RRDc+yzX4=
+
+lambda-tester@^3.6.0:
+  version "3.6.0"
+  resolved "https://registry.yarnpkg.com/lambda-tester/-/lambda-tester-3.6.0.tgz#ceb7d4f4f0da768487a05cff37dcd088508b5247"
+  integrity sha512-F2ZTGWCLyIR95o/jWK46V/WnOCFAEUG/m/V7/CLhPJ7PCM+pror1rZ6ujP3TkItSGxUfpJi0kqwidw+M/nEqWw==
+  dependencies:
+    app-root-path "^2.2.1"
+    dotenv "^8.0.0"
+    dotenv-json "^1.0.0"
+    lambda-leak "^2.0.0"
+    semver "^6.1.1"
+    uuid "^3.3.2"
+    vandium-utils "^1.1.1"
+
 lazystream@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/lazystream/-/lazystream-1.0.0.tgz#f6995fe0f820392f61396be89462407bb77168e4"
@@ -8587,6 +8655,14 @@ resolve@^1.1.6, resolve@^1.10.0, resolve@^1.11.1, resolve@^1.13.1, resolve@^1.17
     is-core-module "^2.1.0"
     path-parse "^1.0.6"
 
+resolve@^1.10.1:
+  version "1.20.0"
+  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.20.0.tgz#629a013fb3f70755d6f0b7935cc1c2c5378b1975"
+  integrity sha512-wENBPt4ySzg4ybFQW2TT1zMQucPK95HSh/nq2CFTZVOGut2+pQvSsgtda4d26YrYcr067wjbmzOG8byDPBX63A==
+  dependencies:
+    is-core-module "^2.2.0"
+    path-parse "^1.0.6"
+
 restore-cursor@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/restore-cursor/-/restore-cursor-2.0.0.tgz#9f7ee287f82fd326d4fd162923d62129eee0dfaf"
@@ -8731,7 +8807,7 @@ semver@7.x, semver@^7.1.1, semver@^7.2.1, semver@^7.3.2, semver@^7.3.4:
   dependencies:
     lru-cache "^6.0.0"
 
-semver@^6.0.0, semver@^6.2.0, semver@^6.3.0:
+semver@^6.0.0, semver@^6.1.0, semver@^6.1.1, semver@^6.2.0, semver@^6.3.0:
   version "6.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
   integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
@@ -9741,7 +9817,7 @@ trivial-deferred@^1.0.1:
   resolved "https://registry.yarnpkg.com/trivial-deferred/-/trivial-deferred-1.0.1.tgz#376d4d29d951d6368a6f7a0ae85c2f4d5e0658f3"
   integrity sha1-N21NKdlR1jaKb3oK6FwvTV4GWPM=
 
-ts-jest@^26.5.1:
+ts-jest@^26.5.0, ts-jest@^26.5.1:
   version "26.5.1"
   resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-26.5.1.tgz#4d53ee4481552f57c1624f0bd3425c8b17996150"
   integrity sha512-G7Rmo3OJMvlqE79amJX8VJKDiRcd7/r61wh9fnvvG8cAjhA9edklGw/dCxRSQmfZ/z8NDums5srSVgwZos1qfg==
@@ -10091,6 +10167,11 @@ validate-npm-package-name@^3.0.0:
   dependencies:
     builtins "^1.0.3"
 
+vandium-utils@^1.1.1:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/vandium-utils/-/vandium-utils-1.2.0.tgz#44735de4b7641a05de59ebe945f174e582db4f59"
+  integrity sha1-RHNd5LdkGgXeWevpRfF05YLbT1k=
+
 verror@1.10.0:
   version "1.10.0"
   resolved "https://registry.yarnpkg.com/verror/-/verror-1.10.0.tgz#3a105ca17053af55d6e270c1f8288682e18da400"