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+++ b/README.md
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-# osr-package-template
-
-Package basics
\ No newline at end of file
+## Components
+
+- [ ] joints
+  - [ ] stationary
+  - [ ] compats
+  - [ ] fasteners
+- [ ] base
+- [ ] axial
+- [ ] linear
+- [ ] glide
+
+## Moulds
+
+- [ ] beam
+- [ ] quad
+- [ ] continous
+- [ ] inserts
+
+## Research
+
+- [ ] Spacing
+- [ ] Language
+  - [ ] [Structural formula](https://en.wikipedia.org/wiki/Structural_formula) (2D)
+    - [ ] [Fischer Projection](https://en.wikipedia.org/wiki/Fischer_projection)
+  - [ ] [Skeletal formula](https://en.wikipedia.org/wiki/Skeletal_formula) (3D)
+    - [ ] Simplified Representation | Nodes and Connectors | Angles and Bonds | Types of Joints | Planar vs. Spatial Diagrams
+    - [ ] ```   □───○  (1,1)   (4,5) ``` (sphere->shaft->box)
+    - [ ] https://en.wikipedia.org/wiki/ACD/ChemSketch
+  - [ ] [BPML](https://en.wikipedia.org/wiki/Business_Process_Modeling_Language)
+    - [ ] [BPMN - Editor Web](https://bpmn.io/)
+
+## Resources
+
+- https://www.123rodamiento.es/rodamiento-cojinete/transmision-lineal/rodamiento-linear/lbbr25-skf
diff --git a/cad/readme.md b/cad/readme.md
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--- a/cad/readme.md
+++ b/cad/readme.md
@@ -1,5 +1,7 @@
 ## Components
 
+### Base
+
 - [ ] joints
   - [ ] stationary
   - [ ] compats
@@ -9,6 +11,10 @@
 - [ ] linear
 - [ ] glide
 
+### Extensions
+
+- [ ] supports for shields
+
 ## Moulds
 
 - [ ] beam
@@ -29,6 +35,21 @@
   - [ ] [BPML](https://en.wikipedia.org/wiki/Business_Process_Modeling_Language)
     - [ ] [BPMN - Editor Web](https://bpmn.io/)
 
+## Design
+
+- bases : preferably cubic, otherwise matching proportions of connected components (golden ratio, at least on one plane)
+- core size + extension space (bolts, washers - max.), starting from 40x40, bounding box must be in even numbers
+- up and down compatible by at least one size
+
+## Implmentation
+
+- SCAD tests (equation->render|step)
+- OSR-AI tests & templates (NPL)
+
+## Stock Sizes
+
+- raw : 50x50 | 70x70 | 90x90 | 130x130
+
 ## Resources
 
 - https://www.123rodamiento.es/rodamiento-cojinete/transmision-lineal/rodamiento-linear/lbbr25-skf
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