diff --git a/selected/compilers.md b/selected/compilers.md
index b961643..a9b77e2 100644
--- a/selected/compilers.md
+++ b/selected/compilers.md
@@ -20,24 +20,24 @@ motivation / goals / what questions are we trying to answer:
 ok what do we want to cover
 - classical compiler structure (lexer -> parser -> codegen)
 
-| Title                        | Page |
-|------------------------------|------|
-| Phases of a Compiler         | https://www.geeksforgeeks.org/phases-of-a-compiler/ |
-| Compiler Architecture        | https://cs.lmu.edu/~ray/notes/compilerarchitecture/ |
-| Compiler Design              | https://www.tutorialspoint.com/compiler_design/compiler_design_phases_of_compiler.htm |
-| Structure of a Compiler      | https://www.csd.uwo.ca/~mmorenom/CS447/Lectures/Introduction.html/node10.html |
-| The Structure of a Compiler  | https://www.brainkart.com/article/The-Structure-of-a-Compiler_8121/ |
-| Wikipedia: Compiler          | https://en.wikipedia.org/wiki/Compiler |
-| Compiler Phases              | https://www.javatpoint.com/compiler-phases |
-| The Structure of a Compiler  | https://pages.cs.wisc.edu/~fischer/cs536.s08/lectures/Lecture04.4up.pdf |
-| Phases of a Compiler         | https://www.guru99.com/compiler-design-phases-of-compiler.html |
-| Writing a C Compiler (Pt. 1) | https://norasandler.com/2017/11/29/Write-a-Compiler.html |
-| V: Structure of a Compiler   | https://www.youtube.com/watch?v=RH02jcUiPI0 |
-| V: Phases of a Compiler      | https://www.youtube.com/watch?v=jE7f3sGLGVk |
-| V: Compiler Design           | https://www.youtube.com/watch?v=OZSGjRSHYUk |
-| V: Different Phases of Comp  | https://www.youtube.com/watch?v=TApMNhQPaCM |
-| V: Phases of Compiler        | https://www.youtube.com/watch?v=r2BRNodqbgI |
-| V: Parser and Lexer (Pt. 1)  | https://www.youtube.com/watch?v=eF9qWbuQLuw |
+|Star| Title                        | Page |
+|----|------------------------------|------|
+|    | Phases of a Compiler         | https://www.geeksforgeeks.org/phases-of-a-compiler/ |
+|    | Compiler Architecture        | https://cs.lmu.edu/~ray/notes/compilerarchitecture/ |
+|    | Compiler Design              | https://www.tutorialspoint.com/compiler_design/compiler_design_phases_of_compiler.htm |
+|    | Structure of a Compiler      | https://www.csd.uwo.ca/~mmorenom/CS447/Lectures/Introduction.html/node10.html |
+|    | The Structure of a Compiler  | https://www.brainkart.com/article/The-Structure-of-a-Compiler_8121/ |
+|    | Wikipedia: Compiler          | https://en.wikipedia.org/wiki/Compiler |
+|    | Compiler Phases              | https://www.javatpoint.com/compiler-phases |
+|    | The Structure of a Compiler  | https://pages.cs.wisc.edu/~fischer/cs536.s08/lectures/Lecture04.4up.pdf |
+|    | Phases of a Compiler         | https://www.guru99.com/compiler-design-phases-of-compiler.html |
+|    | Writing a C Compiler (Pt. 1) | https://norasandler.com/2017/11/29/Write-a-Compiler.html |
+|    | V: Structure of a Compiler   | https://www.youtube.com/watch?v=RH02jcUiPI0 |
+|    | V: Phases of a Compiler      | https://www.youtube.com/watch?v=jE7f3sGLGVk |
+|    | V: Compiler Design           | https://www.youtube.com/watch?v=OZSGjRSHYUk |
+|    | V: Different Phases of Comp  | https://www.youtube.com/watch?v=TApMNhQPaCM |
+|    | V: Phases of Compiler        | https://www.youtube.com/watch?v=r2BRNodqbgI |
+|    | V: Parser and Lexer (Pt. 1)  | https://www.youtube.com/watch?v=eF9qWbuQLuw |
 
 - semantic analysis / type checking
 
@@ -148,12 +148,22 @@ experts / consultants:
     - Mention WASM?
 - The terrors of the real world
     - Executables, linkers, and debug info
+    - Also debug info
     - The C ABI and FFI
-    - Register allocation
-- C is not the only language
-    - LISP
-    - Forth
-    - This could be a whole topic maybe
+    - Debug info
+    - Codegen
+        - Specifically: machine code generation, of reasonable quality
+            - Note: not necessary for all "compilers"
+        - Topics: register allocation, instruction selection, instruction scheduling
+        - Some examples of optimization passes
+        - There are not a lot of resources for this. Place a public TODO here?
+- Appendix:
+    - Grammar basics (BNF, EBNF)
+        - Need not go into exhaustive detail on categories of grammars
+    - C is not the only language
+        - LISP
+        - Forth
+        - This could be a whole topic maybe
 
 ## Link dump
 
@@ -188,4 +198,9 @@ experts / consultants:
 - Lecture Notes on Static Single Assignment Form: https://www.cs.cmu.edu/~rjsimmon/15411-f15/lec/10-ssa.pdf
 - Simple and Efficient Construction of Static Single Assignment Form: https://pp.info.uni-karlsruhe.de/uploads/publikationen/braun13cc.pdf
 - LLVM Greedy Register Allocator – Improving Region Split Decisions: https://llvm.org/devmtg/2018-04/slides/Yatsina-LLVM%20Greedy%20Register%20Allocator.pdf
-- NULLSTONE Optimization Categories: ttp://www.nullstone.com/htmls/category.htm
\ No newline at end of file
+- NULLSTONE Optimization Categories: ttp://www.nullstone.com/htmls/category.htm
+
+## Articles that we need to write
+
+- Codegen (needs more details)
+- Debug info
\ No newline at end of file