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diff --git a/starts/meaning-vm/habit-starts/learning-parts.hpp b/starts/meaning-vm/habit-starts/learning-parts.hpp
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+++ b/starts/meaning-vm/habit-starts/learning-parts.hpp
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+#pragma once
+
+#include "common.hpp"
+
+namespace habitstarts {
+
+// first need ability to trigger on stuff.
+// whenever A happens, do B.
+// stop doing B whenever A happens.
+// when A happens, do B once.
+
+decl(action, happens, context);
+decl(happened); // happened-habit(ctx) performs actions associated with ctx[happens]
+decl(whenever); // whenever-habit(ctx) stores to do ctx[action] when ctx[happens] happens
+                // providing ctx[action-context]
+decl(stop); decl(when); // stop-when-habit(ctx) removes doing ctx[happens] on ctx[event]
+decl(once); // once-habit(ctx) stores to do ctx[action] the next time ctx[happens] happens
+            // providing ctx[action-context]
+
+/*
+	Testing metric: runs when event is fired, measures time between
+	  event and right time.  if [usual] time is less than ever before, success.
+	  if time is significantly more than behavior's norm, failure.
+	Convert to English: try to have the event happen at the right time.
+*/
+// starting out by making a judgement habit that occasionally provides 'good' or 'bad' to things, to lead how to develop
+	// for fairness, seems reasonable to provide a pattern showing reason for good or bad
+// 
+
+// set to do 1ce at goal time:
+// 	ctx X
+// 	set to do 1ce on goal time:
+// 		set next-happened (local)
+// 	delay (a sequence of habits that do nothing)
+// 	if next-happened is set
+// 		remove something from delay
+// 	otherwise
+// 		add something to delay (wait for unspecified user-perceptible time, selected from discrete set)
+// 	provide adjusted delay to next context
+
+}