Merge commit '3c60637c1a27da8ba66888de518d58d5707801f2' as 'repos/effect-smol'

repos/effect-smol/.changeset/unify-error-defect-stack-options.md

@@ -0,0 +1,23 @@
+---
+"effect": patch
+---
+
+Replace the `Schema.Error` and `Schema.Defect` schema constants with constructor
+functions, `Schema.Error()` and `Schema.Defect()`.
+
+Unify `Schema.ErrorWithStack` into `Schema.Error({ includeStack: true })` and
+`Schema.DefectWithStack` into `Schema.Defect({ includeStack: true })`.
+
+Error causes are encoded by default using the same JSON defect encoding
+semantics used by `Schema.Defect`; pass `{ excludeCause: true }` to omit nested
+cause data.
+
+Equivalent `Schema.Error` and `Schema.Defect` options are canonicalized, so
+repeated constructor calls with the same option values reuse the same schema.
+
+`Schema.Defect()` now models defects as `unknown` values with a JSON encoded
+form. Error-shaped JSON objects with a string `message` decode to JavaScript
+`Error` values, so non-`Error` objects such as `{ message: "boom" }` do not
+round-trip unchanged. Other non-`Error` values are normalized through JSON
+serialization, with non-JSON values falling back to Effect's formatted string
+representation.