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--- a/README.md
+++ b/README.md
@@ -67,3 +67,7 @@ for text streams.
 ## Documentation
 
 The [`pw` man page](../tree/pw.1) has all the usage details.
+
+## High Level State Diagram
+
+![PipeWatch State Diagram](https://www.plantuml.com/plantuml/png/ZLHFRzi-3BthKn0v_D3-bWOz3Xam55qNeCEm0kjssRe3Qp6nK5ioI3bPjlMxJx8Znuupf0S34lduXu_FkXAFxEkoK99XGV3wyX8sHljSgU___u2BYxTmZTdJYbrjDSnXahcon73y0zK6_fjqg8LZEewQADLpHkm7ztXVIqLMKqI_yrnSV5DgO1vNVbo5J3tJkEeo8aPPJc7cO9q7hgqrTgNK07xlqTS2ahkDVGFQI5NW5kfAeoU1sXOamPjIpPII443zahyLmB2Vhp4wb0hftrjFh61lYlv-P_SLPXHuOALWwF1eDR86OwlQ0nE6waF8RUEfK2HSVSwkNkMmk5tS7G8_qGR4OXMczDAGuV69R2pPZjEr5uT9nXiZ6R8EvfvnOOeYMg8fNU9GFJJCcoOQhpnOxpfQnVoYMHEQu2awPPeFi0_Ms8m9XKAUirUm4zqq92KkWIc2pXN0e9jstd0awRAPiYHjq5EnFS0ohP1risQt1CzcjI8EPmPlIdArb-b1H9GzCW7goAvtaDNCP7r7yNZ4ETmLUjVIabtP4gJPLHNfCHW5R3S2CfjrecsucRIms1uJVQwjJOH-QGU9wqz3dSav27crY-WG4J-8xo84ie8mG5BC47Mp8vTfoIGvwKXDOY5fx5YWi_14sqSNvOsPDslZjzD6uedqwV4uXiA5audxNsC1zBCol9sDHZheBISvqjeuQ9EJfJLnkvxCMK_M2vJeipnnCcl2dbNydfKQl60VZQMkI5knVLuwKTTLnIJIUqbw2U8kTyRUXb5WihzEzfYeo0Hepj6he7EqB-pB_qk05DpzHKKa49DoKVzRxjSlLtl4dXRxQIPssa-u99M4xDqd0-1U-17MtHhkO9WeliC3pO2p0vsca9VBjD_0A7iIu1XuGf5HYrTaTLqMVm40.png)