Create BIRS-workshop-debrief.md

misc/BIRS-workshop-debrief.md

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+- intro video + hands on sesh was a good format
+- presentation: work a bit bring the big picture together (based on 1:1 discussions with participants afterwards)
+- current challenge: how to connect bookkeeping stuff to the dynamics (expressions/how people simulate models), which i understand—-what the vignette tries to start explaining without getting into expressions per se
+    - make a *real* quickstart (simulate an SIR)
+    - change the name of the current quickstart + add a section at the end explaining the suppressed expressions list, initial vecs, unstructured matrices
+    - follow up with a more structured model, calibration, and ideally forecasting (generating ensembles in the future)
+- dev focus: making macpan2 friendlier (it's powerful, but is it friendly)
+    - making the interface simpler for basic models so people don't *have* to get into the specifics of Euler, RK4, etc, but they can if they want to, maybe this involves writing friendly wrappers that don’t expose *everything* to the user to start
+    - connected to coming up with a real quickstart
+- ideas for a “friendlier” interface
+    - make reproducible chunks (modules) for components of the expression list and/or an expression list shared between models (classify models based on this)
+    - modules for transmission, post-processing delays, etc.
+    - think about reducing the naming burden (unique column names in ledgers for different expressions)
+        - expression list that doesn’t directly reference the ledgers but just expresses the logic… e.g. `lambda = beta*S` vs `rate[force_of_infection] ~ rate[transmission_rate]*state[from_state]`
+        - make the expression list look more like deSolve