feat(codemode): math parity (#35609)

packages/codemode/codemode.md

@@ -155,12 +155,10 @@ current omissions to implement, not intentional product boundaries.
       collection values, then extend it to bounded host streams when a stream boundary exists.
 - [ ] Support callback-bearing standard-library variants that models commonly generate: the mapper argument to
       `Array.from(...)` and replacers for `JSON.stringify(...)`, including Effect-aware callbacks where needed.
-- [ ] Close basic `Object` parity gaps: let `Object.values`/`Object.entries` accept arrays, make `Object.assign` validate
-      and mutate its target, add `Object.is`, and let `Object.fromEntries` consume every supported iterable.
+- [ ] Add `Object.is` after runtime method and tool references have stable identity semantics.
 - [ ] Add deterministic modern collection conveniences where they improve orchestration: `Object.groupBy`, Set
       composition methods, and `Array.prototype.toSpliced`.
-- [ ] Complete the deterministic `Math` surface beyond the current arithmetic, rounding, root, power, and logarithm
-      helpers. Decide separately whether nondeterministic `Math.random` belongs in the runtime.
+- [ ] Decide whether nondeterministic `Math.random` and iterable `Math.sumPrecise` belong in the runtime.
 - [ ] Refine diagnostics so user throws, expected tool failures, unexpected host/tool defects, and genuine interpreter
       defects are distinguishable without leaking private causes.