🐐 String indexing and slicing

README.md

@@ -70,6 +70,21 @@ Any expression can appear inside `{}`. Values are coerced to strings the same wa
 
 Single-quoted strings do **not** interpolate — `'{nomen}'` is the literal text `{nomen}`. Use `{{` and `}}` for literal braces in double-quoted strings: `"use {{braces}}"` → `use {braces}`.
 
+#### String Indexing and Slicing
+
+Strings support the same indexing and slicing syntax as arrays. Indexing is 1-based and returns a single-character string:
+
+```
+"SALVTE"[I]             @> "S"
+"SALVTE"[III]           @> "L"
+```
+
+Slicing uses `VSQVE` with inclusive bounds, returning a substring:
+
+```
+"SALVTE"[II VSQVE IV]   @> "ALV"
+```
+
 Integer modulo is `RELIQVVM`: `VII RELIQVVM III` evaluates to `I`. Under the `FRACTIO` module it returns a fraction, so `IIIS RELIQVVM IS` is `S` (i.e. 1/2).
 
 ### Integers