Added additional functions and readme,

README.md

@@ -1,2 +1,53 @@
 # sidekick
 dicebot
+
+This bot rolls dice and evaluates simple math expressions in Discord messages
+
+You interact with it by sending messages in a channel the bot can see
+
+Requires you to update .env with a private DISCORD_TOKEN if you want to host your own
+
+## Commands
+- Short form:
+  - `/r <expression>`
+  - `.r <expression>`
+  - `!r <expression>`
+- Long form:
+  - `/roll <expression>`
+  - `.roll <expression>`
+  - `!roll <expression>`
+
+## Expression Syntax
+
+Supported pieces of an expression:
+
+- **Dice**
+  - `NdM` → roll N, M-sided dice (e.g. `3d6`)
+  - `dM`  → shorthand for `1dM` (e.g. `d20`)
+- **Integers**
+  - Whole numbers (e.g. `5`, `-2`)
+- **Operators** (integer arithmetic)
+  - `+` addition  
+  - `-` subtraction  
+  - `*` multiplication  
+  - `/` division (truncating, **DICE DON'T ROLL DECIMALS!**)  
+  - `^` exponent (non-negative, limited size)
+- **Parentheses**
+  - `(` and `)` to control order of operations
+
+Operator precedence: `^` > `*` `/` > `+` `-`.  
+
+## Exploding Dice (Unbound DRNs)
+
+You can make dice “explode” – when a die meets a condition, it rolls again and adds to that die’s total.
+
+- Add `!` after a dice term:
+
+- `NdM!`    → explode on **max** (e.g. `d6!` explodes on 6)
+- `NdM!<X` – explode if a roll is **less than X** (e.g. `d6!<3` explodes on 1–2)
+- `NdM!=X` – explode if a roll is **equal to X** (e.g. `d10!=1` explodes on 1)
+
+Each die may roll multiple times; all rolls for that die are **summed**, and only the final total per die is shown.
+- There is a hard cap on explosion chains of 512 rerolls to avoid infinite loops.
+
+