Check in project plan

plan.txt

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+							 STUDY SYSTEM
+
+GOALS
+
+	1. Support consistent and balanced study across multiple subjects
+	2. Help prioritize what to study when time/energy is available
+	3. Low friction of usage
+	4. Apply cybernetic principles to self-directed education
+
+NON-GOALS
+
+	1. Setting targets for time spent studying
+	2. Measuring effectiveness of studies
+	3. Simplicity of set-up for non-technical users
+	4. Reading mail
+
+CORE FEATURES
+
+Priority System:
+
+	- Prioritized list of potential study activities
+	- Separate tracking of reading and exercises
+	- Neglected subjects increase in priority
+	- Balance maintenance between reading and exercises
+
+Study health monitoring:
+
+	- Subject-level algedonic signals indicating consistency and
+	  balance between reading and exercises
+	- System-wide algedonic signal indicating balance across subjects
+
+IMPLEMENTATION DECISIONS
+
+	- Client/server to enable consistency across multiple devices
+	- Simple over-the-wire protocol so that future client
+      implementations for different platforms are feasible
+      (e.g. Android app)
+	- TCP with TLS for persistent connection
+	- Client authentication via certificates (mTLS) for simplicity of
+	  implementation and security
+	- Server implementation in Erlang/OTP as it's very cool and I want
+      more practise with it
+	- ASN.1/DER for message serialization as it's flexible and reasonably
+      compact and has good Erlang integration
+	- Native Linux client because I hate the web
+	- Client implementation in GTK+Vala because it's boring