diff --git a/packages/codemode/README.md b/packages/codemode/README.md
index 37bde2d8696..2cc67fe36a4 100644
--- a/packages/codemode/README.md
+++ b/packages/codemode/README.md
@@ -237,8 +237,8 @@ A host cannot define its own `$codemode` top-level namespace.
 
 CodeMode executes a deliberately bounded JavaScript subset. It supports:
 
-- Plain data literals, property access, assignment, and destructuring.
-- `if`, conditional expressions, `switch`, `for`, `for...of` (arrays, strings, Maps, Sets), `for...in` (own keys of plain objects, index strings of arrays, and namespace/tool names of `tools` references - anything else is an error suggesting `for...of` or `Object.keys`, rather than real JS's surprising behavior of indices for strings and zero iterations for Maps/Sets), `while`, and `do...while`.
+- Plain data literals, property access, assignment, destructuring, and sequence expressions (the comma operator, evaluated left to right with the final value returned).
+- `if`, conditional expressions, `switch`, `for`, `for...of` (arrays, strings, Maps, Sets, including assignment-form destructuring such as `for ([key, value] of entries)`), `for...in` (own keys of plain objects, index strings of arrays, and namespace/tool names of `tools` references - anything else is an error suggesting `for...of` or `Object.keys`, rather than real JS's surprising behavior of indices for strings and zero iterations for Maps/Sets), `while`, and `do...while`.
 - Arrow functions and function declarations with closures, defaults, rest parameters, and destructuring.
 - Optional chaining, nullish coalescing, templates, spread (arrays, strings, Maps, Sets), and `try`/`catch`.
 - Common array, string, number, `Object`, `Math`, and `JSON` operations. Mutating array methods include `push`/`pop`/`shift`/`unshift`/`splice` (removes in place and returns the removed elements)/`fill`/`copyWithin`; array `keys`/`values`/`entries` return **arrays** (matching the Map/Set convention) and work with `for...of` and spread. String methods include `localeCompare` (locale/options arguments ignored), `normalize`, and the `trimLeft`/`trimRight` aliases. `Object.keys` also accepts arrays (index strings, as in JS) and tool references: `Object.keys(tools)` lists the top-level namespaces, including `$codemode`, and `Object.keys(tools.ns)` lists the names at that node (a callable tool enumerates as `[]`; an unknown path is an `UnknownTool` diagnostic). `Object.values`/`Object.entries` on a tool reference fail with a pointer at `Object.keys(tools)` and `tools.$codemode.search`.