diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f995684..309a3d78 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,12 +11,11 @@
   
 ### **HEAD -> main** 2021/09/13 mandic00@live.com
 
+- enhanced automated tests
 - enable canvas patching for nodejs
 - full ts strict typechecks
 - fix multiple memory leaks
-
-### **origin/main** 2021/09/12 mandic00@live.com
-
+- modularize human class and add model validation
 - add dynamic kernel op detection
 - added human.env diagnostic class
 - minor typos
diff --git a/test/build.log b/test/build.log
index fa632b3b..bfd4e698 100644
--- a/test/build.log
+++ b/test/build.log
@@ -12254,3 +12254,26 @@
 2021-09-13 13:34:27 STATE: Lint: {"locations":["*.json","src/**/*.ts","test/**/*.js","demo/**/*.js"],"files":82,"errors":0,"warnings":0} 
 2021-09-13 13:34:27 STATE: ChangeLog: {"repository":"https://github.com/vladmandic/human","branch":"main","output":"CHANGELOG.md"} 
 2021-09-13 13:34:27 INFO:  Done... 
+2021-09-13 13:53:14 INFO:  @vladmandic/human version 2.2.0 
+2021-09-13 13:53:14 INFO:  User: vlado Platform: linux Arch: x64 Node: v16.5.0 
+2021-09-13 13:53:14 INFO:  Application: {"name":"@vladmandic/human","version":"2.2.0"} 
+2021-09-13 13:53:14 INFO:  Environment: {"profile":"production","config":"build.json","tsconfig":true,"eslintrc":true,"git":true} 
+2021-09-13 13:53:14 INFO:  Toolchain: {"build":"0.4.1","esbuild":"0.12.27","typescript":"4.4.3","typedoc":"0.21.9","eslint":"7.32.0"} 
+2021-09-13 13:53:14 INFO:  Build: {"profile":"production","steps":["clean","compile","typings","typedoc","lint","changelog"]} 
+2021-09-13 13:53:14 STATE: Clean: {"locations":["dist/*","types/*","typedoc/*"]} 
+2021-09-13 13:53:14 STATE: Compile: {"name":"tfjs/nodejs/cpu","format":"cjs","platform":"node","input":"tfjs/tf-node.ts","output":"dist/tfjs.esm.js","files":1,"inputBytes":102,"outputBytes":1416} 
+2021-09-13 13:53:14 STATE: Compile: {"name":"human/nodejs/cpu","format":"cjs","platform":"node","input":"src/human.ts","output":"dist/human.node.js","files":50,"inputBytes":474561,"outputBytes":403826} 
+2021-09-13 13:53:14 STATE: Compile: {"name":"tfjs/nodejs/gpu","format":"cjs","platform":"node","input":"tfjs/tf-node-gpu.ts","output":"dist/tfjs.esm.js","files":1,"inputBytes":110,"outputBytes":1424} 
+2021-09-13 13:53:14 STATE: Compile: {"name":"human/nodejs/gpu","format":"cjs","platform":"node","input":"src/human.ts","output":"dist/human.node-gpu.js","files":50,"inputBytes":474569,"outputBytes":403830} 
+2021-09-13 13:53:14 STATE: Compile: {"name":"tfjs/nodejs/wasm","format":"cjs","platform":"node","input":"tfjs/tf-node-wasm.ts","output":"dist/tfjs.esm.js","files":1,"inputBytes":149,"outputBytes":1491} 
+2021-09-13 13:53:14 STATE: Compile: {"name":"human/nodejs/wasm","format":"cjs","platform":"node","input":"src/human.ts","output":"dist/human.node-wasm.js","files":50,"inputBytes":474636,"outputBytes":403902} 
+2021-09-13 13:53:14 STATE: Compile: {"name":"tfjs/browser/esm/nobundle","format":"esm","platform":"browser","input":"tfjs/tf-browser.ts","output":"dist/tfjs.esm.js","files":1,"inputBytes":2168,"outputBytes":1590} 
+2021-09-13 13:53:14 STATE: Compile: {"name":"human/browser/esm/nobundle","format":"esm","platform":"browser","input":"src/human.ts","output":"dist/human.esm-nobundle.js","files":50,"inputBytes":474735,"outputBytes":406054} 
+2021-09-13 13:53:15 STATE: Compile: {"name":"tfjs/browser/esm/bundle","format":"esm","platform":"browser","input":"tfjs/tf-browser.ts","output":"dist/tfjs.esm.js","files":7,"inputBytes":2168,"outputBytes":2343983} 
+2021-09-13 13:53:15 STATE: Compile: {"name":"human/browser/iife/bundle","format":"iife","platform":"browser","input":"src/human.ts","output":"dist/human.js","files":50,"inputBytes":2817128,"outputBytes":1395892} 
+2021-09-13 13:53:16 STATE: Compile: {"name":"human/browser/esm/bundle","format":"esm","platform":"browser","input":"src/human.ts","output":"dist/human.esm.js","files":50,"inputBytes":2817128,"outputBytes":2591282} 
+2021-09-13 13:53:31 STATE: Typings: {"input":"src/human.ts","output":"types","files":94} 
+2021-09-13 13:53:38 STATE: TypeDoc: {"input":"src/human.ts","output":"typedoc","objects":29,"index":true} 
+2021-09-13 13:54:03 STATE: Lint: {"locations":["*.json","src/**/*.ts","test/**/*.js","demo/**/*.js"],"files":82,"errors":0,"warnings":0} 
+2021-09-13 13:54:03 STATE: ChangeLog: {"repository":"https://github.com/vladmandic/human","branch":"main","output":"CHANGELOG.md"} 
+2021-09-13 13:54:03 INFO:  Done...