Prepare Effect HttpApi backend parity (#24853)

packages/opencode/src/util/named-schema-error.ts

@@ -26,10 +26,17 @@ export function namedSchemaError<Tag extends string, Fields extends Schema.Struc
     })
     .meta({ ref: tag })
 
+  // Effect Schema for the wire shape — used by HttpApi OpenAPI generation.
+  const effectSchema = Schema.Struct({
+    name: Schema.Literal(tag),
+    data: dataSchema,
+  }).annotate({ identifier: tag })
+
   type Data = Schema.Schema.Type<typeof dataSchema>
 
   class NamedSchemaError extends Error {
     static readonly Schema = wire
+    static readonly EffectSchema = effectSchema
     static readonly tag = tag
     public static isInstance(input: unknown): input is NamedSchemaError {
       return typeof input === "object" && input !== null && "name" in input && (input as { name: unknown }).name === tag

packages/opencode/src/util/schema.ts

@@ -11,6 +11,8 @@ export const PositiveInt = Schema.Int.check(Schema.isGreaterThan(0))
  */
 export const NonNegativeInt = Schema.Int.check(Schema.isGreaterThanOrEqualTo(0))
 
+
+
 /**
  * Optional public JSON field that can hold explicit `undefined` on the type
  * side but encodes it as an omitted key, matching legacy `JSON.stringify`.