docs: add v1.0.0 release notes

Author: yaochao

CHANGELOG.en.md

@@ -0,0 +1,39 @@
+# Changelog
+
+[中文变更日志](./CHANGELOG.md)
+
+## v1.0.0
+
+Release date: 2026-04-04
+
+This is the first formal release of the repository. At this point the project has moved from “proved on this machine” to “versioned, verifiable, and repeatable.”
+
+### Major Capabilities
+
+- build the Linux 0.12 boot image and system image from `vendor/src/linux-0.12.tar.gz`, repo-owned patches, manifests, and minimal userland source
+- boot Linux 0.12 under QEMU, enter the shell, and run `ls` automatically
+- provide the minimal userland binaries `/bin/sh` and `/bin/ls`
+- provide shell built-ins for `cd`, `pwd`, `echo`, `cat`, `uname`, and `exit`
+- support macOS arm64, Ubuntu 22.04, and Windows 10 as host platforms
+- provide one-command terminal and visible-window launch scripts
+- provide one-command rebuild-and-run launch scripts
+- provide `verify` and `verify-userland` automated verification entrypoints
+
+### Engineering Outcome
+
+- the repository does not depend on third-party runtime images
+- committed runtime snapshots are self-built, and the hard disk image is stored in compressed form as `images/hdc-0.12.img.xz`
+- runtime launch automatically unpacks that snapshot into `out/repo-images/hdc-0.12.img`
+- GitHub Actions automatically runs unit tests, source builds, and QEMU boot verification on `ubuntu-22.04`
+- the CI workflow has been upgraded to official action versions compatible with Node 24
+
+### Release Assets
+
+- `images/bootimage-0.12-hd`
+- `images/hdc-0.12.img.xz`
+
+### Known Boundaries
+
+- the current goal is a minimal runnable Linux 0.12 system, not a full historical distribution
+- real host validation has been completed primarily on the current macOS host and on the GitHub Ubuntu runner
+- Ubuntu 22.04 and Windows 10 host entrypoints are implemented, but more real-machine regression coverage is still recommended

CHANGELOG.md

@@ -0,0 +1,39 @@
+# 变更日志
+
+[English CHANGELOG](./CHANGELOG.en.md)
+
+## v1.0.0
+
+发布日期：2026-04-04
+
+这是这个仓库的第一个正式发布版本。到这个版本为止，项目已经从“在当前机器上实验性跑通”收敛成“可提交、可验证、可重复启动”的状态。
+
+### 主要能力
+
+- 从 `vendor/src/linux-0.12.tar.gz` 和仓库内补丁、清单、最小用户态源码出发，构建 Linux 0.12 所需的启动镜像和系统镜像
+- 在 QEMU 中启动进入 shell，并自动执行 `ls`
+- 提供最小用户态 `/bin/sh` 和 `/bin/ls`
+- shell 内建支持 `cd`、`pwd`、`echo`、`cat`、`uname`、`exit`
+- 支持 macOS arm64、Ubuntu 22.04、Windows 10 作为宿主机
+- 提供终端版和可见窗口版的一键启动脚本
+- 提供从编译阶段开始的一键启动脚本
+- 提供 `verify` 和 `verify-userland` 自动验证入口
+
+### 工程化结果
+
+- 仓库不依赖第三方运行时镜像
+- 仓库内提交的是自编译运行快照，其中系统镜像以压缩形式保存为 `images/hdc-0.12.img.xz`
+- 运行时会自动解包到 `out/repo-images/hdc-0.12.img`
+- GitHub Actions 已在 `ubuntu-22.04` 上自动执行单元测试、源码构建和 QEMU 启动验证
+- CI workflow 已升级到 Node 24 兼容的官方 action 版本
+
+### 发布资产
+
+- `images/bootimage-0.12-hd`
+- `images/hdc-0.12.img.xz`
+
+### 已知边界
+
+- 当前目标是“最小可运行 Linux 0.12 系统”，不是完整历史发行版
+- 真实宿主机验证主要已在当前 macOS 主机和 GitHub Ubuntu runner 上完成
+- Windows 10 与 Ubuntu 22.04 的入口脚本和平台分支已经落地，但仍建议继续补真实主机回归

README.en.md

@@ -1,6 +1,7 @@
 # Linux 0.12 on QEMU
 
 [中文 README](./README.md)
+[Changelog](./CHANGELOG.en.md)
 
 This repository does one specific thing: on a modern host, it builds the two runtime images required to boot Linux 0.12 under QEMU from source and repo-owned manifests, enters the shell, and verifies the result by running `ls`.
 
@@ -30,6 +31,8 @@ The build and runtime flow is:
 
 This is not a “download a historical image and boot it” repo. It is a “rebuild the runtime images locally and boot them” repo.
 
+Current formal release: `v1.0.0`
+
 ## Supported Hosts
 
 - macOS arm64

README.md

@@ -1,6 +1,7 @@
 # Linux 0.12 on QEMU
 
 [English README](./README.en.md)
+[变更日志](./CHANGELOG.md)
 
 这个仓库的目标很直接：在现代宿主机上，从源码和仓库内清单出发，构建出 Linux 0.12 运行所需的两张 QEMU 镜像，启动进入 shell，并成功执行 `ls`。
 
@@ -30,6 +31,8 @@
 
 这不是“导入历史镜像再启动”的项目，而是“本地重建运行镜像再启动”的项目。
 
+当前正式发布版本：`v1.0.0`
+
 ## 支持的宿主机
 
 - macOS arm64