🔖 chore: establish the 1.x legacy-decorator maintenance line

The 2.x README tells projects on an oxc-based toolchain to stay on 1.x, but no
such line existed — this branch point was version 0.1.0, so the advice pointed
at nothing installable.

- version 1.0.0
- CI runs on this branch as well as main and develop
- README opens with a maintenance-line notice pointing new projects at 2.x and
  naming the one reason to stay here: oxc does not implement the TC39 standard
  decorator transform, while tsc and esbuild do
- CHANGELOG names the release

No functional change: the code is exactly the state merged as PR #3.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SAcqrz3FcadkYr3xG32CjK

.github/workflows/ci.yml

@@ -2,9 +2,9 @@ name: CI
 
 on:
   push:
-    branches: [ main, develop ]
+    branches: [ main, develop, 1.x ]
   pull_request:
-    branches: [ main, develop ]
+    branches: [ main, develop, 1.x ]
 
 jobs:
   verify:

CHANGELOG.md

@@ -5,7 +5,13 @@ All notable changes to this project are documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [1.0.0] - 2026-08-05
+
+The legacy-decorator line, promoted from 0.1.0 and now maintained in parallel with 2.x.
+Functionally identical to the previous unreleased state; only the version and the
+maintenance-line notice changed. See the 2.x branch for standard decorators and
+compile-time rule checking.
+
 
 ### Added
 

README.md

@@ -1,5 +1,15 @@
 # Cereale
 
+> **This is the 1.x maintenance line**, which uses TypeScript's legacy
+> `experimentalDecorators`. It is feature-complete and supported for bug fixes.
+>
+> **New projects should use 2.x**, which moves to TC39 standard decorators and gains
+> compile-time checking of validation rules against field types — `@IsString() age: number`
+> becomes a compile error rather than a runtime surprise.
+>
+> Stay on 1.x if your toolchain transpiles with **oxc**, which does not yet implement the
+> standard decorator transform. `tsc` and esbuild both do, so most projects can move.
+
 Cereale is a lightweight TypeScript library that provides Spring-like decorators for JSON mapping and validation. Built with ZERO external dependencies, it simplifies the process of converting between plain JSON and class instances with full validation support.
 
 ## Features

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "cereale",
-  "version": "0.1.0",
+  "version": "1.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "cereale",
-      "version": "0.1.0",
+      "version": "1.0.0",
       "license": "MIT",
       "devDependencies": {
         "@eslint/js": "^10.0.1",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "cereale",
-  "version": "0.1.0",
+  "version": "1.0.0",
   "description": "Spring-like decorators for JSON mapping and validation in TypeScript",
   "type": "module",
   "main": "./dist/cjs/index.js",