📝 Note the gate in changelog and backlog

Close the broad-universe type-hole task and cancel the widened-literal
test task, since arbitrary strings no longer fall through to a fallback.

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- reject broad universes (`string`, `number`, template literals) and
+  value/stringification collisions (`true | "true"`, `1 | "1"`) at the factory
+- type handler parameters by the matched member (`Member<T, K>`), so a
+  standalone `"true"` universe is typed `"true"` rather than `true`
+
 ## [0.6.0] - 2026-09-22
 
 - add `getTaggedUnionMatcher` / `getTaggedUnionMatcherW` for discriminated unions