diff --git a/insns/README.md b/insns/README.md
index d9a0ebd..a8ca67e 100644
--- a/insns/README.md
+++ b/insns/README.md
@@ -30,9 +30,11 @@
 | CL-type (32 bit version) | C\_LW |
 | CL-type (64 bit version) | C\_LD |
 
-## File Synopsis
+## Class Synopsis
 
-TODO
+_Note: This section is under development and will be updated as more classes are implemented._
+
+- `Insn`: General RISC-V instruction
 
 ## Parameters