diff --git a/docs/en/release-notes/changelog.md b/docs/en/release-notes/changelog.md
index 4da719f1f36..adccb02795b 100644
--- a/docs/en/release-notes/changelog.md
+++ b/docs/en/release-notes/changelog.md
@@ -6,6 +6,28 @@ outline: 2
 
 This page documents the changes in each Kimi Code CLI release.
 
+## 0.42.0 (2026-09-09)
+
+### Features
+
+- Remote Control is now always on; the experimental `KIMI_CODE_EXPERIMENTAL_REMOTE_CONTROL` flag has been removed. See [Remote Control](https://moonshotai.github.io/kimi-code/guides/remote-control.html) for details.
+- web: Support permanently deleting sessions from the session row context menu, with a confirmation prompt.
+- Add read-only tools to the `/btw` side agent.
+- web: Preview images and videos in a reorderable media rail in the composer, mention them in the text on demand, and keep the previews after queueing and sending.
+- Accept HEIC, HEIF, and BMP images in prompt attachments and `ReadMediaFile` when the model is served by Kimi.
+
+### Polish
+
+- Collapse finished tool calls in the transcript to a header plus one marked outcome row: short output is shown whole, hidden output is counted (`N more lines`, `+N more`) and revealed by `Ctrl-O`, which the footer advertises while it is available.
+- Upgrade the default thinking effort to the recommended level for eligible users.
+- The subagent model pool (`[secondary_model]`) is now always on; the experimental secondary-model flag and the `KIMI_CODE_EXPERIMENTAL_SECONDARY_MODEL` opt-out have been removed.
+- Add configurable character limits and resumable long-line file reads without repeated output truncation; see [`read`](https://moonshotai.github.io/kimi-code/configuration/config-files.html#read) for details.
+- The minidb session-index read model and global search worker are now always on; the experimental flags have been replaced by the `[database]` config section and the `KIMI_CODE_PERSISTENCE_MINIDB_READMODEL` / `KIMI_CODE_SEARCH_WORKER` env vars; see [`database`](https://moonshotai.github.io/kimi-code/configuration/config-files.html#database) for details.
+
+### Bug Fixes
+
+- Fix several known issues and make various refinements. See the [changelog on GitHub](https://github.com/MoonshotAI/kimi-code/blob/main/apps/kimi-code/CHANGELOG.md) for more technical entries.
+
 ## 0.41.0 (2026-09-04)
 
 ### Features
diff --git a/docs/zh/release-notes/changelog.md b/docs/zh/release-notes/changelog.md
index e662e22f1bd..7f8cea8909c 100644
--- a/docs/zh/release-notes/changelog.md
+++ b/docs/zh/release-notes/changelog.md
@@ -6,6 +6,28 @@ outline: 2
 
 本页记录 Kimi Code CLI 每个版本的变更内容。
 
+## 0.42.0（2026-09-09）
+
+### 新功能
+
+- Remote Control 由实验性转为正式，无需再设置 `KIMI_CODE_EXPERIMENTAL_REMOTE_CONTROL` 实验开关。详见 [Remote Control](https://moonshotai.github.io/kimi-code/zh/guides/remote-control.html)。
+- Web 版支持从会话行的右键菜单永久删除会话，删除前会要求确认。
+- `/btw` 侧边聊天的 subagent 新增只读工具。
+- Web 版输入框新增可排序的媒体预览栏，可在文本中按需引用图片和视频，排队与发送后预览仍然保留。
+- 模型由 Kimi 提供时，支持在提示词附件与 `ReadMediaFile` 中使用 HEIC、HEIF 和 BMP 图片。
+
+### 优化
+
+- 消息记录中已完成的工具调用现折叠为标题加一行结果摘要：短输出完整展示，隐藏内容以 `N more lines`、`+N more` 计数并按 `Ctrl-O` 展开，页脚会在可用时提示。
+- 符合条件的用户的默认思考强度升级为推荐级别。
+- 子 Agent 模型池（`[secondary_model]`）现已始终开启，实验开关与 `KIMI_CODE_EXPERIMENTAL_SECONDARY_MODEL` 退出选项已移除。
+- `Read` 新增可配置的字符上限，长行文件可续读，输出不再被反复截断。详见 [`read`](https://moonshotai.github.io/kimi-code/zh/configuration/config-files.html#read)。
+- minidb 会话索引读模型与全局搜索 worker 现已始终开启，实验开关由 `[database]` 配置段与 `KIMI_CODE_PERSISTENCE_MINIDB_READMODEL` / `KIMI_CODE_SEARCH_WORKER` 环境变量取代。详见 [`database`](https://moonshotai.github.io/kimi-code/zh/configuration/config-files.html#database)。
+
+### 修复
+
+- 修复了一些已知问题，并做了若干细节优化。更详细的变更记录见 [GitHub](https://github.com/MoonshotAI/kimi-code/blob/main/apps/kimi-code/CHANGELOG.md)。
+
 ## 0.41.0（2026-09-04）
 
 ### 新功能