document functino nr args

CLAUDE.md

@@ -22,6 +22,7 @@ All code uses 2 spaces for indentation. K&R style for C and Javascript.
 - No classes — only objects and prototypes (`meme()`, `proto()`, `isa()`)
 - No `for...in`, `for...of`, spread (`...`), rest params, or default params
 - No named function declarations — use `var fn = function() {}` or arrow functions
+- Functions have a maximum of 4 parameters — use a record for more
 - Variables must be declared at function body level only (not in if/while/for/blocks)
 - All variables must be initialized at declaration (`var x` alone is an error; use `var x = null`)
 - No `try`/`catch`/`throw` — use `disrupt`/`disruption`

docs/language.md

@@ -398,6 +398,8 @@ fn2()               // 1
 
 ### Arguments
 
+Functions can have at most **4 parameters**. Use a record to pass more values.
+
 Extra arguments are ignored. Missing arguments are `null`.
 
 ```javascript
@@ -406,6 +408,11 @@ fn(1, 2, 3)        // 3 (extra arg ignored)
 
 var fn2 = function(a, b) { return a }
 fn2(1)              // 1 (b is null)
+
+// More than 4 parameters — use a record
+var draw = function(shape, opts) {
+  // opts.x, opts.y, opts.color, ...
+}
 ```
 
 ### Immediately Invoked Function Expression