Merge pull request #204 from Tencent/release/0.2.1

Release/0.2.1

.github/workflows/ci.yml

@@ -38,7 +38,7 @@ jobs:
         run: cargo test --workspace --locked
 
   windows-daemon:
-    name: Windows daemon and update regression tests
+    name: Windows daemon, installer and cancellation regression tests
     runs-on: windows-latest
 
     steps:
@@ -55,8 +55,16 @@ jobs:
       - name: Run Windows update tests
         run: cargo test -p bsk --lib --locked cli::update::tests
 
-      - name: Run Windows update process tests
-        run: cargo test -p bsk --test windows_update --locked
+      - name: Run Windows update and cancellation process tests
+        run: cargo test -p bsk --test windows_update --test windows_parent_cancel --locked
+
+      - name: Run installer tests (Windows PowerShell 5.1)
+        shell: powershell
+        run: ./scripts/install-windows.test.ps1
+
+      - name: Run installer tests (PowerShell 7)
+        shell: pwsh
+        run: ./scripts/install-windows.test.ps1
 
   frontend:
     name: Frontend lint, typecheck, tests, build

CHANGELOG.md

@@ -5,7 +5,24 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/).
 
 Starting from 0.2.0, CLI / Extension / DSH Plugin share the same version number.
 
-## [Unreleased]
+## [0.2.1] - 2026-09-09
+
+### Changed
+- DSH Plugin: clarified installation, configuration, profile restart, and upgrade instructions
+
+### Fixed
+- CLI: reliable Windows self-updates, including executable replacement and daemon restart
+- CLI: Windows named-pipe connection continuity and stale daemon process detection
+- Windows installer: PowerShell 5.1 compatibility, path quoting, and staged executable replacement
+- CLI / DSH Plugin: cancellation propagation and upload/download cleanup when the parent process exits
+- Extension: tab ownership and session cleanup when agent tabs fail to open or borrowed tabs are returned or closed
+- Extension: navigation recovery when other extensions restrict Chrome DevTools Protocol access
+- Extension: background input filling, automatic append behavior, and verification of field values before reporting success
+- Extension: match observed form state to the correct element after page changes
+- Extension: UUID generation fallback for recording and overlays on insecure origins
+- Browser locale matching for regional language variants
+- DSH Plugin: observation state synchronization, thumbnail capture lifecycle, and stale preview cleanup
+- DSH Plugin: removed the obsolete client runtime host dependency
 
 ## [0.2.0] - 2026-09-02
 

Cargo.lock

@@ -134,7 +134,7 @@ dependencies = [
 
 [[package]]
 name = "bsk"
-version = "0.2.0"
+version = "0.2.1"
 dependencies = [
  "anyhow",
  "base64",
@@ -169,7 +169,7 @@ dependencies = [
 
 [[package]]
 name = "bsk-protocol"
-version = "0.2.0"
+version = "0.2.1"
 dependencies = [
  "schemars",
  "semver",

Cargo.toml

@@ -7,7 +7,7 @@ members = [
 default-members = ["crates/bsk-cli"]
 
 [workspace.package]
-version = "0.2.0"
+version = "0.2.1"
 edition = "2024"
 rust-version = "1.85"
 license = "MIT"
@@ -43,7 +43,7 @@ rand = "0.8"
 uuid = { version = "1", features = ["v4", "serde"] }
 
 # Workspace crates (version required for `cargo publish` of dependents)
-bsk-protocol = { version = "0.2.0", path = "crates/bsk-protocol" }
+bsk-protocol = { version = "0.2.1", path = "crates/bsk-protocol" }
 
 [profile.release]
 strip = "symbols"

README.md

@@ -147,20 +147,26 @@ Start a new Agent session and write a prompt that needs the browser, for example
 Using [DeepSeek Harness](https://github.com/deepseek-ai/deepseek-harness) (`dsh`)?
 BrowserSkill ships a first-class dsh plugin on npm as
 [`@wxg-prc-cpg/browser-skill-dsh-plugin`](https://www.npmjs.com/package/@wxg-prc-cpg/browser-skill-dsh-plugin).
-It injects native `browser_*` tools (no shelling out to `bsk`) and a live Web UI
-overlay of each Agent Window.
+It gives the agent native `browser_*` tools and a live view of its browser sessions
+in the Web UI. The plugin runs `bsk` on the agent's behalf.
 
-Add it to a dsh profile, then start that profile:
+Install the `bsk` CLI and connect the browser extension first. Then add the plugin
+to a dsh profile and start it (replace `web` with your profile name):
 
 ```sh
 dsh plugin --profile web add @wxg-prc-cpg/browser-skill-dsh-plugin
 dsh --profile web
 ```
 
-The plugin carries its own copy of the skill, so `bsk install-skill` is not needed
-for dsh — but the `bsk` CLI and the browser extension are still prerequisites. See
-the [plugin README](packages/dsh-plugin-browserskill/README.md) for the tool list,
-configuration, and the observation overlay.
+The plugin includes the `browser-skill` skill, so `bsk install-skill` is not needed
+for dsh. Installed plugins do not update automatically. To upgrade this plugin:
+
+```sh
+dsh plugin --profile web update @wxg-prc-cpg/browser-skill-dsh-plugin --latest
+```
+
+Restart the profile after upgrading. See the
+[plugin README](packages/dsh-plugin-browserskill/README.md) for usage and configuration.
 
 ## How It Works
 

README.zh-CN.md

@@ -125,16 +125,22 @@ bsk install-skill
 
 ## DeepSeek Harness 插件
 
-在用 [DeepSeek Harness](https://github.com/deepseek-ai/deepseek-harness)（`dsh`）？BrowserSkill 提供了官方 dsh 插件，已发布到 npm：[`@wxg-prc-cpg/browser-skill-dsh-plugin`](https://www.npmjs.com/package/@wxg-prc-cpg/browser-skill-dsh-plugin)。它会注入原生 `browser_*` 工具（无需再通过 Shell 调用 `bsk`），并在 Web UI 中实时观察每个 Agent Window。
+在用 [DeepSeek Harness](https://github.com/deepseek-ai/deepseek-harness)（`dsh`）？BrowserSkill 提供了官方 dsh 插件，已发布到 npm：[`@wxg-prc-cpg/browser-skill-dsh-plugin`](https://www.npmjs.com/package/@wxg-prc-cpg/browser-skill-dsh-plugin)。它为 Agent 提供原生 `browser_*` 工具，由插件代为调用 `bsk`，并在 Web UI 中实时展示浏览器会话。
 
-把它装进某个 dsh profile，然后启动该 profile：
+先安装 `bsk` CLI 并连接浏览器扩展，再将插件装进 dsh profile 并启动（将 `web` 替换为你的 profile 名称）：
 
 ```sh
 dsh plugin --profile web add @wxg-prc-cpg/browser-skill-dsh-plugin
 dsh --profile web
 ```
 
-插件自带 skill，所以在 dsh 下无需执行 `bsk install-skill`；但 `bsk` CLI 和浏览器扩展仍是前置条件。工具清单、配置项与观察浮层见[插件 README](packages/dsh-plugin-browserskill/README.md)。
+插件自带 `browser-skill` skill，所以在 dsh 下无需执行 `bsk install-skill`。已安装的插件不会自动更新；升级此插件请运行：
+
+```sh
+dsh plugin --profile web update @wxg-prc-cpg/browser-skill-dsh-plugin --latest
+```
+
+升级后重启该 profile。用法与配置见[插件 README](packages/dsh-plugin-browserskill/README.md)。
 
 ## 工作原理
 

apps/extension/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@browser-skill/extension",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "private": true,
   "type": "module",
   "scripts": {

crates/bsk-cli/src/cli/business_rpc.rs

@@ -73,6 +73,14 @@ where
     P: Serialize + Send + 'static,
     R: DeserializeOwned + Send + 'static,
 {
+    let parent_cancel = stdin_cancellation();
+    if parent_cancel.as_ref().is_some_and(|rx| *rx.borrow()) {
+        return Err(CliError::from_rpc(RpcError {
+            code: ErrorCode::Cancelled,
+            message: "parent closed the cancellation pipe".into(),
+            data: Some(serde_json::json!({"reason": "cancelled_before_dispatch"})),
+        }));
+    }
     let rpc_id: RpcId = format!("{}-{}", rpc_id_prefix, random_short_id());
     let mut client = IpcClient::connect(sock.clone()).await?;
     let rpc_id_for_call = rpc_id.clone();
@@ -88,16 +96,16 @@ where
     let outcome = tokio::select! {
         biased;
         res = &mut main_fut => res?,
-        sig = wait_for_sigint() => {
-            sig.context("install SIGINT handler").map_err(CliError::Local)?;
-            debug!(rpc_id = %rpc_id_for_cancel, "SIGINT: forwarding cancel to daemon");
+        sig = wait_for_cancel(parent_cancel) => {
+            sig.context("wait for cancellation").map_err(CliError::Local)?;
+            debug!(rpc_id = %rpc_id_for_cancel, "forwarding cancel to daemon");
             let _ = send_cancel(&sock, &rpc_id_for_cancel).await;
             match tokio::time::timeout(CANCEL_RESPONSE_GRACE, &mut main_fut).await {
                 Ok(res) => res?,
                 Err(_) => {
                     debug!(
                         rpc_id = %rpc_id_for_cancel,
-                        "SIGINT: cancel grace elapsed; synthesising cancelled error"
+                        "cancel grace elapsed; synthesising cancelled error"
                     );
                     return Err(CliError::from_rpc(RpcError {
                         code: ErrorCode::Cancelled,
@@ -112,6 +120,46 @@ where
     outcome.map_err(CliError::from_rpc)
 }
 
+/// Release caller-owned staging even after cancellation. This deliberately
+/// exposes only transfer.release, not a general bypass for business RPCs.
+/// The entire batch, including connection setup, shares one bounded budget.
+pub fn release_transfers<'a>(
+    sock: &Path,
+    transfer_ids: impl IntoIterator<Item = &'a str>,
+) -> Result<(), CliError> {
+    use bsk_protocol::tools::{TransferIdParams, TransferReleaseResult};
+    const CLEANUP_TIMEOUT: Duration = Duration::from_secs(5);
+    let ids: Vec<_> = transfer_ids.into_iter().collect();
+    if ids.is_empty() {
+        return Ok(());
+    }
+    let rt = tokio::runtime::Builder::new_current_thread()
+        .enable_all()
+        .build()
+        .context("build runtime for transfer cleanup")?;
+    rt.block_on(async {
+        tokio::time::timeout(CLEANUP_TIMEOUT, async {
+            let mut client = IpcClient::connect(sock).await?;
+            for id in ids {
+                client
+                    .call::<_, TransferReleaseResult>(
+                        "transfer-release",
+                        Method::TransferRelease,
+                        Some(TransferIdParams {
+                            transfer_id: id.to_string(),
+                        }),
+                        CLEANUP_TIMEOUT,
+                    )
+                    .await?
+                    .map_err(CliError::from_rpc)?;
+            }
+            Ok::<_, CliError>(())
+        })
+        .await
+        .context("transfer cleanup exceeded its total time budget")?
+    })
+}
+
 /// Send a `cancel { rpc_id }` frame over a fresh connection so it
 /// lands on the daemon while the original call is still parked.
 ///
@@ -146,8 +194,57 @@ fn random_short_id() -> String {
     bytes.iter().map(|b| format!("{b:02x}")).collect()
 }
 
-/// Wait for either Ctrl-C or process SIGTERM. Returning here means
-/// the user has asked us to stop.
+/// Opt-in control pipe for parent processes that cannot send Ctrl-C (Node on
+/// Windows). One reader survives the short-lived runtimes used by multi-RPC
+/// commands such as upload. Ordinary CLI stdin and terminal Ctrl-C are unchanged.
+fn stdin_cancellation() -> Option<tokio::sync::watch::Receiver<bool>> {
+    if std::env::var("BSK_CANCEL_ON_STDIN_CLOSE").as_deref() != Ok("1") {
+        return None;
+    }
+    static CANCEL: std::sync::OnceLock<tokio::sync::watch::Receiver<bool>> =
+        std::sync::OnceLock::new();
+    Some(
+        CANCEL
+            .get_or_init(|| {
+                let (tx, rx) = tokio::sync::watch::channel(false);
+                std::thread::spawn(move || {
+                    use std::io::Read;
+                    let mut stdin = std::io::stdin().lock();
+                    let mut buf = [0; 64];
+                    loop {
+                        match stdin.read(&mut buf) {
+                            Ok(0) => break,
+                            Ok(_) => {}
+                            Err(err) if err.kind() == std::io::ErrorKind::Interrupted => continue,
+                            Err(_) => break,
+                        }
+                    }
+                    let _ = tx.send(true);
+                });
+                rx
+            })
+            .clone(),
+    )
+}
+
+async fn wait_for_cancel(
+    parent_cancel: Option<tokio::sync::watch::Receiver<bool>>,
+) -> anyhow::Result<()> {
+    let parent_closed = async move {
+        match parent_cancel {
+            Some(mut rx) => {
+                let _ = rx.wait_for(|closed| *closed).await;
+            }
+            None => std::future::pending::<()>().await,
+        }
+    };
+    tokio::select! {
+        result = wait_for_sigint() => result,
+        _ = parent_closed => Ok(()),
+    }
+}
+
+/// Wait for terminal Ctrl-C.
 async fn wait_for_sigint() -> anyhow::Result<()> {
     tokio::signal::ctrl_c().await.context("listen for SIGINT")?;
     Ok(())

crates/bsk-cli/src/cli/download.rs

@@ -9,8 +9,7 @@ use anyhow::Context;
 use base64::Engine;
 use bsk_protocol::Method;
 use bsk_protocol::tools::{
-    DownloadParams, DownloadResult, TransferChunkParams, TransferChunkResult, TransferIdParams,
-    TransferReleaseResult,
+    DownloadParams, DownloadResult, TransferChunkParams, TransferChunkResult,
 };
 use clap::Args;
 use uuid::Uuid;
@@ -70,13 +69,7 @@ pub fn dispatch(args: DownloadArgs, format: Format) -> Result<(), CliError> {
         CliError::Local(anyhow::anyhow!("daemon returned no download transfer id"))
     })?;
     let write_result = write_transfer(&info.sock_path, &transfer_id, &args.out, args.overwrite);
-    let _: Result<TransferReleaseResult, CliError> = crate::cli::business_rpc::call(
-        info.sock_path,
-        "transfer-release",
-        Method::TransferRelease,
-        Some(TransferIdParams { transfer_id }),
-        Duration::from_secs(5),
-    );
+    let _ = crate::cli::business_rpc::release_transfers(&info.sock_path, [transfer_id.as_str()]);
     write_result?;
     match format {
         Format::Json => {

crates/bsk-cli/src/cli/upload.rs

@@ -10,8 +10,7 @@ use base64::Engine;
 use bsk_protocol::Method;
 use bsk_protocol::tools::{
     TransferBeginParams, TransferBeginResult, TransferChunkParams, TransferChunkResult,
-    TransferIdParams, TransferReadyResult, TransferReleaseResult, UploadFile, UploadMode,
-    UploadParams, UploadResult,
+    TransferIdParams, TransferReadyResult, UploadFile, UploadMode, UploadParams, UploadResult,
 };
 use clap::{Args, ValueEnum};
 
@@ -69,14 +68,12 @@ pub fn dispatch(args: UploadArgs, format: Format) -> Result<(), CliError> {
     let (ref_, selector) = split_target(args.target, args.ref_, args.selector)?;
     let mut staged = Vec::new();
     for path in &args.files {
-        match stage_file(&info.sock_path, &args.session, path) {
-            Ok(file) => staged.push(file),
-            Err(err) => {
-                for (id, _) in &staged {
-                    let _ = release(&info.sock_path, id);
-                }
-                return Err(err);
-            }
+        if let Err(err) = stage_file(&info.sock_path, &args.session, path, &mut staged) {
+            let _ = crate::cli::business_rpc::release_transfers(
+                &info.sock_path,
+                staged.iter().map(|(id, _)| id.as_str()),
+            );
+            return Err(err);
         }
     }
     let params = UploadParams {
@@ -102,6 +99,17 @@ pub fn dispatch(args: UploadArgs, format: Format) -> Result<(), CliError> {
         Some(params),
         ipc_timeout(args.timeout),
     );
+    // The helper can reject cancellation before handing any request to the
+    // daemon. In that case staging still belongs to this CLI.
+    if result.as_ref().is_err_and(|err| {
+        err.data()
+            .is_some_and(|data| data["reason"] == "cancelled_before_dispatch")
+    }) {
+        let _ = crate::cli::business_rpc::release_transfers(
+            &info.sock_path,
+            staged.iter().map(|(id, _)| id.as_str()),
+        );
+    }
     // Once tool.upload is dispatched, staging ownership belongs to the
     // session. A transport timeout cannot prove that Chrome did not attach
     // the file, so releasing here could invalidate a late successful attach.
@@ -118,7 +126,12 @@ pub fn dispatch(args: UploadArgs, format: Format) -> Result<(), CliError> {
     Ok(())
 }
 
-fn stage_file(sock: &Path, session: &str, path: &PathBuf) -> Result<(String, String), CliError> {
+fn stage_file(
+    sock: &Path,
+    session: &str,
+    path: &PathBuf,
+    staged: &mut Vec<(String, String)>,
+) -> Result<(), CliError> {
     let mut file = File::open(path)
         .with_context(|| format!("open upload file {}", path.display()))
         .map_err(CliError::Local)?;
@@ -149,55 +162,39 @@ fn stage_file(sock: &Path, session: &str, path: &PathBuf) -> Result<(String, Str
         }),
         Duration::from_secs(10),
     )?;
-    let staged = (|| {
-        let mut offset = 0u64;
-        let mut buf = vec![0u8; begin.chunk_size as usize];
-        loop {
-            let n = file.read(&mut buf).map_err(|e| CliError::Local(e.into()))?;
-            if n == 0 {
-                break;
-            }
-            let reply: TransferChunkResult = crate::cli::business_rpc::call(
-                sock.to_path_buf(),
-                "transfer-chunk",
-                Method::TransferChunk,
-                Some(TransferChunkParams {
-                    transfer_id: begin.transfer_id.clone(),
-                    offset,
-                    data_base64: base64::engine::general_purpose::STANDARD.encode(&buf[..n]),
-                }),
-                Duration::from_secs(30),
-            )?;
-            offset = reply.next_offset;
+    // Record ownership immediately so one error path releases both completed
+    // files and the current partially staged file.
+    staged.push((begin.transfer_id.clone(), name));
+    let mut offset = 0u64;
+    let mut buf = vec![0u8; begin.chunk_size as usize];
+    loop {
+        let n = file.read(&mut buf).map_err(|e| CliError::Local(e.into()))?;
+        if n == 0 {
+            break;
         }
-        let _: TransferReadyResult = crate::cli::business_rpc::call(
+        let reply: TransferChunkResult = crate::cli::business_rpc::call(
             sock.to_path_buf(),
-            "transfer-finish",
-            Method::TransferFinish,
-            Some(TransferIdParams {
+            "transfer-chunk",
+            Method::TransferChunk,
+            Some(TransferChunkParams {
                 transfer_id: begin.transfer_id.clone(),
+                offset,
+                data_base64: base64::engine::general_purpose::STANDARD.encode(&buf[..n]),
             }),
-            Duration::from_secs(10),
+            Duration::from_secs(30),
         )?;
-        Ok::<_, CliError>(())
-    })();
-    if let Err(err) = staged {
-        let _ = release(sock, &begin.transfer_id);
-        return Err(err);
+        offset = reply.next_offset;
     }
-    Ok((begin.transfer_id, name))
-}
-
-fn release(sock: &Path, id: &str) -> Result<TransferReleaseResult, CliError> {
-    crate::cli::business_rpc::call(
+    let _: TransferReadyResult = crate::cli::business_rpc::call(
         sock.to_path_buf(),
-        "transfer-release",
-        Method::TransferRelease,
+        "transfer-finish",
+        Method::TransferFinish,
         Some(TransferIdParams {
-            transfer_id: id.to_string(),
+            transfer_id: begin.transfer_id.clone(),
         }),
-        Duration::from_secs(5),
-    )
+        Duration::from_secs(10),
+    )?;
+    Ok(())
 }
 
 fn ipc_timeout(timeout_ms: u32) -> Duration {

crates/bsk-cli/tests/windows_parent_cancel.rs

@@ -0,0 +1,342 @@
+//! Real Windows CLI cancellation, including caller-owned transfer cleanup.
+#![cfg(windows)]
+
+use std::path::Path;
+use std::sync::{Arc, Mutex};
+use std::time::{Duration, Instant};
+
+use bsk::daemon::{file_transfer::TransferRegistry, info::DaemonInfo};
+use bsk_protocol::tools::{TransferBeginParams, TransferIdParams};
+use bsk_protocol::{ErrorCode, Frame, Method, ResponseBody, ResponseFrame, RpcError};
+use serde_json::json;
+use tokio::io::{AsyncBufReadExt, AsyncWriteExt, BufReader};
+use tokio::net::windows::named_pipe::ServerOptions;
+use tokio::process::Command;
+use tokio::sync::{Notify, watch};
+
+fn response<T: serde::Serialize>(result: Result<T, RpcError>) -> ResponseBody {
+    match result {
+        Ok(value) => ResponseBody::Ok(serde_json::to_value(value).unwrap()),
+        Err(err) => ResponseBody::Err(err),
+    }
+}
+
+#[test]
+fn stdin_close_cancels_business_but_releases_resources_with_a_bounded_budget() {
+    // Resolve the production registry's root before starting any runtime threads.
+    let registry_home = tempfile::tempdir().unwrap();
+    let original_home = std::env::var_os("BSK_HOME");
+    unsafe {
+        std::env::set_var("BSK_HOME", registry_home.path());
+    }
+    let transfers = Arc::new(TransferRegistry::new().unwrap());
+    unsafe {
+        match original_home {
+            Some(value) => std::env::set_var("BSK_HOME", value),
+            None => std::env::remove_var("BSK_HOME"),
+        }
+    }
+    transfers.initialize().unwrap();
+    tokio::runtime::Builder::new_current_thread()
+        .enable_all()
+        .build()
+        .unwrap()
+        .block_on(exercise(
+            transfers,
+            &registry_home.path().join("run/transfers"),
+        ));
+}
+
+async fn exercise(transfers: Arc<TransferRegistry>, staging_root: &Path) {
+    for mode in [
+        "wait",
+        "upload",
+        "upload-multi",
+        "upload-before-dispatch",
+        "download",
+        "upload-multi-stall",
+        "ordinary",
+    ] {
+        let home = tempfile::tempdir().unwrap();
+        let pipe_name = format!(r"\\.\pipe\bsk-parent-cancel-{}", uuid::Uuid::new_v4());
+        let info = DaemonInfo::now(std::process::id(), (&pipe_name).into(), 0, "0.2.0");
+        std::fs::write(
+            home.path().join("daemon.json"),
+            serde_json::to_vec(&info).unwrap(),
+        )
+        .unwrap();
+        let mut pipe = ServerOptions::new()
+            .first_pipe_instance(true)
+            .create(&pipe_name)
+            .unwrap();
+        let registered = Arc::new(Notify::new());
+        let pending = Arc::new(Mutex::new(None::<String>));
+        let ids = Arc::new(Mutex::new(Vec::<String>::new()));
+        let released = Arc::new(Mutex::new(Vec::<String>::new()));
+        let received = Arc::new(Mutex::new(Vec::<Method>::new()));
+        let download_id = if mode == "download" {
+            let staging = transfers.begin_download("fixture").unwrap();
+            let browser_dir = home.path().join("BrowserSkill").join(&staging.transfer_id);
+            std::fs::create_dir_all(&browser_dir).unwrap();
+            let file = browser_dir.join("download.txt");
+            std::fs::write(&file, b"download fixture").unwrap();
+            transfers
+                .import_download(&staging.transfer_id, &file)
+                .unwrap();
+            ids.lock().unwrap().push(staging.transfer_id.clone());
+            Some(staging.transfer_id)
+        } else {
+            None
+        };
+        let (cancel, cancelled) = watch::channel(false);
+        let ready = Arc::clone(&registered);
+        let name = pipe_name.clone();
+        let registry = Arc::clone(&transfers);
+        let server_ids = Arc::clone(&ids);
+        let server_released = Arc::clone(&released);
+        let server_received = Arc::clone(&received);
+        let server = tokio::spawn(async move {
+            let mut connections = tokio::task::JoinSet::new();
+            loop {
+                pipe.connect().await.unwrap();
+                let next = ServerOptions::new().create(&name).unwrap();
+                let connection = std::mem::replace(&mut pipe, next);
+                let ready = Arc::clone(&ready);
+                let pending = Arc::clone(&pending);
+                let cancel = cancel.clone();
+                let mut cancelled = cancelled.clone();
+                let name = name.clone();
+                let registry = Arc::clone(&registry);
+                let ids = Arc::clone(&server_ids);
+                let released = Arc::clone(&server_released);
+                let received = Arc::clone(&server_received);
+                let download_id = download_id.clone();
+                connections.spawn(async move {
+                    let (read, mut write) = tokio::io::split(connection);
+                    let mut reader = BufReader::new(read);
+                    let mut line = String::new();
+                    while reader.read_line(&mut line).await.unwrap_or(0) > 0 {
+                        let Frame::Request(req) = serde_json::from_str::<Frame>(&line).unwrap()
+                        else {
+                            panic!("expected request");
+                        };
+                        line.clear();
+                        received.lock().unwrap().push(req.method.clone());
+                        let params = req.params.clone().unwrap_or_default();
+                        let body = match req.method {
+                            Method::SystemStatus => ResponseBody::Ok(json!({
+                                "daemon_version": "0.2.0", "protocol_version": "1.1",
+                                "pid": std::process::id(), "uptime_secs": 0,
+                                "ws_port": 0, "sock_path": name,
+                                "browsers": [], "sessions": [], "version_skew_browsers": []
+                            })),
+                            Method::TransferBegin => {
+                                let begin = registry
+                                    .begin_upload(serde_json::from_value(params).unwrap())
+                                    .unwrap();
+                                ids.lock().unwrap().push(begin.transfer_id.clone());
+                                response(Ok(begin))
+                            }
+                            Method::ToolDownload => ResponseBody::Ok(json!({
+                                "tab_id": 1, "suggested_filename": "download.txt",
+                                "byte_size": 16, "transfer_id": download_id,
+                            })),
+                            Method::ToolWaitMs if mode == "ordinary" => {
+                                ResponseBody::Ok(json!({"waited_ms": 1}))
+                            }
+                            Method::TransferChunk
+                                if mode == "upload-before-dispatch"
+                                    || (mode.contains("multi")
+                                        && ids.lock().unwrap().len() == 1) =>
+                            {
+                                response(
+                                    registry.write_chunk(serde_json::from_value(params).unwrap()),
+                                )
+                            }
+                            Method::TransferFinish if mode != "upload-before-dispatch" => response(
+                                registry.finish_upload(serde_json::from_value(params).unwrap()),
+                            ),
+                            Method::ToolWaitMs
+                            | Method::TransferChunk
+                            | Method::TransferRead
+                            | Method::TransferFinish => {
+                                *pending.lock().unwrap() = Some(req.id.clone());
+                                ready.notify_one();
+                                cancelled.wait_for(|value| *value).await.unwrap();
+                                if mode == "upload-before-dispatch" {
+                                    // Finish won the race with cancellation, but tool.upload must
+                                    // not be dispatched and the CLI still owns the staging.
+                                    response(
+                                        registry
+                                            .finish_upload(serde_json::from_value(params).unwrap()),
+                                    )
+                                } else {
+                                    ResponseBody::Err(RpcError {
+                                        code: ErrorCode::Cancelled,
+                                        message: "parent cancellation reached daemon".into(),
+                                        data: None,
+                                    })
+                                }
+                            }
+                            Method::Cancel => {
+                                let target = params["rpc_id"].as_str().unwrap();
+                                assert_eq!(pending.lock().unwrap().as_deref(), Some(target));
+                                cancel.send(true).unwrap();
+                                ResponseBody::Ok(json!({"cancelled": true}))
+                            }
+                            Method::TransferRelease => {
+                                let params: TransferIdParams =
+                                    serde_json::from_value(params).unwrap();
+                                released.lock().unwrap().push(params.transfer_id.clone());
+                                if mode.contains("stall") {
+                                    std::future::pending::<()>().await;
+                                }
+                                response(Ok(registry.release(params)))
+                            }
+                            other => panic!("unexpected request after cancellation: {other:?}"),
+                        };
+                        let response = Frame::Response(ResponseFrame { id: req.id, body });
+                        let mut bytes = serde_json::to_vec(&response).unwrap();
+                        bytes.push(b'\n');
+                        if write.write_all(&bytes).await.is_err() {
+                            break;
+                        }
+                    }
+                });
+            }
+        });
+
+        let mut cmd = Command::new(env!("CARGO_BIN_EXE_bsk"));
+        cmd.env("BSK_HOME", home.path())
+            .env("BSK_AUTO_UPDATE", "off")
+            .env_remove("BSK_CANCEL_ON_STDIN_CLOSE")
+            .stdout(std::process::Stdio::piped())
+            .stderr(std::process::Stdio::piped())
+            .creation_flags(0x0800_0000)
+            .kill_on_drop(true);
+        if mode.starts_with("upload") {
+            let source = home.path().join("upload.txt");
+            // Declare 300 MiB without allocating or transferring that much data.
+            std::fs::File::create(&source)
+                .unwrap()
+                .set_len(if mode == "upload-before-dispatch" {
+                    16
+                } else {
+                    300 * 1024 * 1024
+                })
+                .unwrap();
+            cmd.args(["upload", "--session", "fixture", "--selector", "input"]);
+            if mode.contains("multi") {
+                let first = home.path().join("first.txt");
+                std::fs::write(&first, b"first file").unwrap();
+                cmd.arg("--file").arg(first);
+            }
+            cmd.arg("--file").arg(source);
+        } else if mode == "download" {
+            let out = home.path().join("out.txt");
+            std::fs::write(&out, b"existing output").unwrap();
+            cmd.args([
+                "download",
+                "--session",
+                "fixture",
+                "--selector",
+                "a",
+                "--overwrite",
+                "--out",
+            ])
+            .arg(out);
+        } else {
+            cmd.args(["wait-ms", if mode == "ordinary" { "1ms" } else { "60s" }]);
+        }
+        cmd.arg("--json");
+        if mode == "ordinary" {
+            cmd.stdin(std::process::Stdio::null());
+        } else {
+            cmd.env("BSK_CANCEL_ON_STDIN_CLOSE", "1")
+                .stdin(std::process::Stdio::piped());
+        }
+        let mut child = cmd.spawn().unwrap();
+        if mode != "ordinary" {
+            tokio::time::timeout(Duration::from_secs(10), registered.notified())
+                .await
+                .expect("CLI registered business RPC");
+            child
+                .stdin
+                .as_mut()
+                .unwrap()
+                .write_all(b"still connected")
+                .await
+                .unwrap();
+            drop(child.stdin.take());
+        }
+        let start = Instant::now();
+        let output = tokio::time::timeout(Duration::from_secs(8), child.wait_with_output())
+            .await
+            .expect("CLI must settle promptly, including cleanup")
+            .unwrap();
+        server.abort();
+        let _ = server.await;
+        assert_eq!(
+            output.status.code(),
+            Some(if mode == "ordinary" { 0 } else { 2 }),
+            "{mode}: stdout={} stderr={}",
+            String::from_utf8_lossy(&output.stdout),
+            String::from_utf8_lossy(&output.stderr)
+        );
+        if mode != "ordinary" {
+            let body: serde_json::Value = serde_json::from_slice(&output.stdout).unwrap();
+            assert_eq!(body["code"], "cancelled");
+            if mode != "upload-before-dispatch" {
+                assert_eq!(body["message"], "parent cancellation reached daemon");
+            }
+            let received = received.lock().unwrap();
+            let cancel = received.iter().position(|m| *m == Method::Cancel).unwrap();
+            assert!(
+                received[cancel + 1..]
+                    .iter()
+                    .all(|m| *m == Method::TransferRelease),
+                "only cleanup may follow cancellation: {received:?}"
+            );
+        }
+        let ids = ids.lock().unwrap();
+        if mode.contains("stall") {
+            assert_eq!(released.lock().unwrap().len(), 1);
+            assert!(start.elapsed() >= Duration::from_secs(4));
+            // The CLI cannot force an unresponsive daemon to clean up.
+            transfers.release_session("fixture");
+        } else {
+            assert_eq!(
+                *released.lock().unwrap(),
+                *ids,
+                "{mode}: every allocation must be released"
+            );
+            for id in ids.iter() {
+                assert!(!staging_root.join(id).exists(), "staging leaked: {id}");
+            }
+            if mode.starts_with("upload") {
+                let retry = transfers
+                    .begin_upload(TransferBeginParams {
+                        session_id: "fixture".into(),
+                        name: "retry.txt".into(),
+                        byte_size: 300 * 1024 * 1024,
+                    })
+                    .expect("same session must have room for another 300 MiB upload");
+                transfers.release(TransferIdParams {
+                    transfer_id: retry.transfer_id,
+                });
+            }
+        }
+        if mode == "download" {
+            assert_eq!(
+                std::fs::read(home.path().join("out.txt")).unwrap(),
+                b"existing output"
+            );
+            assert!(
+                !std::fs::read_dir(home.path())
+                    .unwrap()
+                    .flatten()
+                    .any(|entry| entry.file_name().to_string_lossy().ends_with(".part"))
+            );
+        }
+    }
+}

install.ps1

@@ -21,6 +21,7 @@ $ErrorActionPreference = "Stop"
 
 $Repo = if ($env:BSK_REPO) { $env:BSK_REPO } else { "Tencent/BrowserSkill" }
 $InstallDir = if ($env:BSK_INSTALL_DIR) { $env:BSK_INSTALL_DIR } else { Join-Path $HOME ".local\bin" }
+$InstallDir = $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath($InstallDir)
 $GitHub = "https://github.com/${Repo}"
 
 function Write-Log {
@@ -64,7 +65,7 @@ function Get-PlatformTriple {
 function Add-ToUserPath {
     param([string]$Dir)
 
-    $currentUserPath = [Environment]::GetEnvironmentVariable("PATH", "User") -split ";" | Where-Object { $_ }
+    $currentUserPath = @([Environment]::GetEnvironmentVariable("PATH", "User") -split ";" | Where-Object { $_ })
 
     if ($currentUserPath -contains $Dir) {
         Write-Log "$Dir is already in your user PATH"
@@ -90,30 +91,59 @@ function Add-ToSessionPath {
 # ── Git Bash (bash environment) PATH helper ──────────────────────────────────
 
 function Add-ToBashProfile {
-    param([string]$Dir)
+    param([string]$Dir, [string]$BashRc = (Join-Path $HOME ".bashrc"))
 
     # Convert Windows path (e.g. C:\Users\foo\.local\bin) to Git-Bash Unix-style (/c/Users/foo/.local/bin)
     $unixPath = $Dir -replace '\\', '/'
     if ($unixPath -match '^([A-Z]):(.*)$') {
         $unixPath = '/' + $matches[1].ToLower() + $matches[2]
     }
-    $bashRc = Join-Path $HOME ".bashrc"
-    $exportLine = "export PATH=""${unixPath}:`$PATH""  # bsk CLI"
+    # Single-quote the literal directory; only the existing PATH is expanded.
+    $shellQuote = "'" + [char]34 + "'" + [char]34 + "'"
+    $quotedPath = "'" + $unixPath.Replace("'", $shellQuote) + "'"
+    $exportLine = "export PATH=${quotedPath}:`"`$PATH`"  # bsk CLI"
 
-    if (Test-Path $bashRc) {
-        $content = Get-Content $bashRc -Raw -ErrorAction SilentlyContinue
-        if ($content -match [regex]::Escape($unixPath)) {
+    if (Test-Path -LiteralPath $BashRc) {
+        $content = [System.IO.File]::ReadAllText($BashRc)
+        if ($content.Contains($exportLine)) {
             Write-Log "$unixPath is already in ~/.bashrc"
             return
         }
     }
 
-    Add-Content $bashRc "`n$exportLine" -Encoding ASCII
+    # Explicit BOM-less UTF-8 also works in Windows PowerShell 5.1.
+    [System.IO.File]::AppendAllText($BashRc, "`n$exportLine`n", (New-Object System.Text.UTF8Encoding($false)))
     Write-Log "added ${unixPath} to ~/.bashrc"
 }
 
 # ── Main ──────────────────────────────────────────────────────────────────────
 
+# Stage on the destination volume before stopping the daemon. Never truncate
+# the installed executable: failed replacement must leave it usable.
+function Install-Binary {
+    param([string]$Source, [string]$Target)
+
+    $staged = "$Target.install-$([Guid]::NewGuid().ToString('N'))"
+    try {
+        [System.IO.File]::Copy($Source, $staged)
+        if ([System.IO.File]::Exists($Target)) {
+            # Use the downloaded CLI: older versions have broken Windows
+            # liveness checks. Stop verifies daemon identity before terminating it.
+            & $Source daemon stop
+            if ($LASTEXITCODE -ne 0) { throw "could not stop bsk daemon; existing installation was not replaced" }
+            # PowerShell 5.1 converts $null to an empty path for string parameters.
+            [System.IO.File]::Replace($staged, $Target, [NullString]::Value)
+            Write-Log "daemon will restart automatically on the next browser command"
+        }
+        else {
+            [System.IO.File]::Move($staged, $Target)
+        }
+    }
+    finally {
+        if ([System.IO.File]::Exists($staged)) { [System.IO.File]::Delete($staged) }
+    }
+}
+
 function Main {
     $platform = Get-PlatformTriple
 
@@ -184,7 +214,7 @@ function Main {
             New-Item -ItemType Directory -Path $InstallDir -Force | Out-Null
         }
 
-        Copy-Item -Path (Join-Path $tempDir "bsk.exe") -Destination (Join-Path $InstallDir "bsk.exe") -Force
+        Install-Binary -Source (Join-Path $tempDir "bsk.exe") -Target (Join-Path $InstallDir "bsk.exe")
 
         Write-Log "installed bsk to $InstallDir\bsk.exe"
 
@@ -199,12 +229,8 @@ function Main {
 
         # Verify
         $bskPath = Join-Path $InstallDir "bsk.exe"
-        if (Get-Command bsk -ErrorAction SilentlyContinue) {
-            & bsk --version
-        }
-        else {
-            Write-Log "verify install: & ""$bskPath"" --version"
-        }
+        & $bskPath --version
+        if ($LASTEXITCODE -ne 0) { throw "installed bsk failed verification" }
 
         Write-Log "done"
         Write-Host ""

packages/dsh-plugin-browserskill/README.md

@@ -1,13 +1,51 @@
-# dsh-plugin-browserskill
+# BrowserSkill for DeepSeek Harness
 
-npm: [`@wxg-prc-cpg/browser-skill-dsh-plugin`](https://www.npmjs.com/package/@wxg-prc-cpg/browser-skill-dsh-plugin)
+[![npm version](https://img.shields.io/npm/v/@wxg-prc-cpg/browser-skill-dsh-plugin)](https://www.npmjs.com/package/@wxg-prc-cpg/browser-skill-dsh-plugin)
 
-A [DeepSeek Harness](https://github.com/deepseek-ai/deepseek-harness) (dsh) tool plugin that exposes
-[BrowserSkill](https://github.com/Tencent/BrowserSkill) (`bsk`) browser automation to the model.
+Use [BrowserSkill](https://github.com/Tencent/BrowserSkill) in
+[DeepSeek Harness](https://github.com/deepseek-ai/deepseek-harness) (`dsh`) to browse
+websites, fill forms, and capture screenshots through native `browser_*` tools.
+Browser tasks run in Agent Windows, with a live view in the dsh Web UI.
 
-Each action maps to one `bsk <cmd> --json` invocation: the plugin spawns the bsk CLI, parses its
-structured JSON output, and returns a canonical typed value. The bsk daemon, browser, and browser
-extension keep owning the actual browser control — this package is a thin, well-typed bridge.
+## Installation
+
+Before installing the plugin:
+
+- Install [DeepSeek Harness](https://github.com/deepseek-ai/deepseek-harness) and
+  [pnpm](https://pnpm.io/installation), which dsh uses to manage plugins.
+- Install the `bsk` CLI and connect the BrowserSkill extension in Chrome or Edge.
+  Follow the [BrowserSkill setup guide](https://github.com/Tencent/BrowserSkill#quick-start).
+- Make sure `bsk` is on the `PATH` used to start dsh, or set `bskPath` in the plugin configuration.
+
+Install the plugin into the `web` profile, then start it:
+
+```sh
+dsh plugin --profile web add @wxg-prc-cpg/browser-skill-dsh-plugin
+dsh --profile web
+```
+
+Replace `web` with your profile name if you use a different profile. The plugin
+includes the `browser-skill` skill; no separate `bsk install-skill` step is needed.
+
+In a conversation, try:
+
+```text
+/browser-skill open example.com and summarize the page.
+```
+
+By default, the browser tools become available when the skill is invoked.
+
+## Updating
+
+Installed plugins do not update automatically. To upgrade this plugin to npm's
+`latest` version, including versions outside the profile's saved dependency range:
+
+```sh
+dsh plugin --profile web update @wxg-prc-cpg/browser-skill-dsh-plugin --latest
+```
+
+Restart that dsh profile after upgrading. This command updates the plugin; update
+the `bsk` CLI and browser extension separately when a release requires it.
 
 ## Tools
 
@@ -20,23 +58,7 @@ extension keep owning the actual browser control — this package is a thin, wel
 | `browser_tabs` | `list`, `create`, `select`, `close`, `borrow`, `return` | Manage Agent Window tabs and temporarily borrow user tabs. |
 | `browser_assist` | `resize`, `emulate`, `request-help` | Resize or emulate the browser and pause for human-only steps. |
 
-`bsk evaluate` and `bsk record` are intentionally not exposed by this plugin: arbitrary page
-evaluation is a higher-risk capability, while recording is long-running and needs a dedicated
-DeepSeek Harness lifecycle before it can be added safely.
-
-## Agent skill (progressive disclosure)
-
-Beyond the tools, the plugin publishes the **`browser-skill` agent skill** through the harness's
-official skill seam (`ctx.skills.register`): the catalog entry (name + routing description) is
-resident in `<available_skills>`, and the body is loaded only when the model invokes the `skill`
-tool. Its single source is the DSH-specific `skill/SKILL.md`, which documents only structured
-`browser_*` calls and their plugin semantics. The repository-root CLI skill is intentionally not
-concatenated: its command examples belong to a different execution interface and would bypass
-the plugin's ownership, live observation UI, cancellation, and cleanup path if followed directly.
-The build rejects internal CLI-name leakage, command-line code blocks, unknown browser tools, and
-missing supported browser tools before embedding the Markdown. Registration and every pre-step
-catalog snapshot are pure in-memory reads (no disk/process/daemon); compositions without the skill
-seam degrade silently.
+Arbitrary page-script evaluation and interaction recording are not supported.
 
 ## Multi-session model
 
@@ -55,136 +77,73 @@ an explicit `session` argument naming a foreign or unknown id is rejected, the `
 `browser_session` shows plugin-created sessions only (no daemon-wide view), and stop/unload cleanup
 can never touch a session owned by another program.
 
-## Installation
-
-The plugin follows the standard dsh bundle layout (`dsh.bundle` manifest + `cordis.patch.yml`):
-
-```sh
-dsh plugin --profile <name> add @wxg-prc-cpg/browser-skill-dsh-plugin
-dsh --profile <name>
-```
-
-Prerequisite: the `bsk` CLI must be installed and on `PATH`, and the BrowserSkill browser extension
-(Chrome or Edge) must be connected — see the
-[BrowserSkill README](https://github.com/Tencent/BrowserSkill). When bsk is missing, tool calls fail
-with install guidance instead of a bare spawn error.
-
 ## Configuration
 
-All fields are optional and validated through the plugin's Schemastery `Config`:
+After installing the plugin, edit your profile's `cordis.patch.yml`. For the `web`
+profile, the default location is `~/.dsh/profiles/web/cordis.patch.yml`. If you set
+`DSH_HOME`, use `$DSH_HOME/profiles/web/cordis.patch.yml` instead. Replace `web` with
+your profile name as needed.
+
+If the file contains only comments and `[]`, keep the comments and replace `[]`
+with the YAML below. If it already contains patch entries, add this entry to the
+existing list or edit its existing `id: browserskill` entry. Keep a single
+top-level YAML list. This overrides the plugin registered by the installed bundle:
 
 ```yaml
-# cordis.patch.yml override example
-- insert:
-    - id: browserskill
-      name: "@wxg-prc-cpg/browser-skill-dsh-plugin"
-      config:
-        bskPath: bsk          # path to the bsk binary (default: resolve from PATH)
-        defaultTimeoutMs: 120000
-        maxSessions: 5
-        # observationEnabled: true     # live PiP/overlay observation (below)
-        # thumbnailIntervalMs: 1500    # frame cadence while a session is active
-        # idleIntervalMs: 8000         # idle cadence / recent-activity window
-        # lazyTools: true              # reveal browser_* tools only after the skill is invoked
+- id: browserskill
+  config:
+    bskPath: bsk
+    defaultTimeoutMs: 120000
+    maxSessions: 5
+    observationEnabled: true
+    thumbnailIntervalMs: 1500
+    idleIntervalMs: 8000
+    lazyTools: true
 ```
 
-- **`lazyTools` (default `true`)** — the final progressive-disclosure stage: the six
-  `browser_*` tool schemas stay OUT of the system prompt (zero schema tokens) until the
-  `browser-skill` skill is actually invoked — the skill catalog entry is the only
-  advertisement. One successful invocation (model tool call, or a `/browser-skill` user
-  gesture) registers the whole suite for the rest of the process; repeated invocations are
-  no-ops, and sessions resumed with a past invocation in their durable log reveal the suite
-  on entry. Set `false` for the legacy always-on registration.
+Change `bskPath` to the full path of your CLI binary if it is not on dsh's `PATH`.
+A patch replaces the entry's entire `config` object, so keep all overrides you need
+together in that object.
 
-## Observation overlay (PiP mini-window)
+Configuration changes follow `dsh.profile.patchReload` in the profile's
+`package.json`: `live` (the default for `web`) applies changes when you save the
+patch file; `startup` requires restarting the profile. Restart after upgrading
+the plugin in either case.
 
-When the plugin runs inside the dsh Web UI, an **observation overlay** floats over the app
-(registered into the `shell.overlay` seat): a breathing thumbnail per owned session plus its
-current action and elapsed time. The card docks at the top-right of the content area (clear of
-the composer and the shell's header controls) and wears the **BrowserSkill product family's own
-look**: the overlay reuses `@browser-skill/ui` components (`Button`, `cn`) and its oklch design
-tokens (`--card`, `--primary`, `--destructive`, `--ring`, …), status dots spec'd after the
-extension popup's connection indicator, and Remix icons. The BSK utility sheet is compiled
-scoped under the `.bsk-obs` root class (`scripts/build-client-css.mjs`), so the overlay looks
-like the BrowserSkill extension without leaking a single selector into the host shell — and the
-shell's theme cannot bleed back in.
+All fields are optional; omitted fields use the defaults below:
 
-- **Lifecycle**: hidden while the plugin owns no sessions; appears on the first
-  `browser_session` start action; disappears when all sessions stop (or the plugin unloads).
-- **Focus view**: status row (green/idle/red dot + session + action + mm:ss), the latest page
-  frame (while viewed, refreshes every ~1.5s while active, ~8s when idle; the last good frame stays on
-  stage while the next one loads, and is kept on errors so the card does not flash),
-  and a compact icon toolbar (Interrupt + Pop out, hover for the label).
-- **Interrupt**: one click kills the in-flight bsk command of the focus session (same semantics
-  as the chat Stop button — the current action fails, the agent run may continue). Strip items
-  carry their own hover interrupt button.
-- **Multi-session strip**: every session gets a tile (mini frame + id + status dot); focus
-  auto-follows the most recently active session; clicking a tile pins focus (pin badge, click
-  again to release); errored sessions get a red edge without stealing focus; sessions the daemon
-  lost are greyed out; prolonged daemon/browser outage shows "browser unavailable" and greys
-  the interrupt button until captures recover.
-- **Drag & resize**: drag the header to move the card; drag any of the four
-  corners to resize (min 240×180, max 80% of the viewport; no visible grip).
-  Both are remembered for the page lifetime.
-- **Pop out (PiP)**: upgrades the card into a native Document PiP window (requires a user
-  gesture, per browser rules), sized from the current card; closing the PiP falls back to the
-  in-page card with state intact. Browsers without Document PiP simply hide the button.
-- **Screenshot demand**: the client requests periodic screenshots while an observation view is
-  visible, using the PiP document's visibility when popped out. Hidden or collapsed views can
-  keep subscribing to state without requesting screenshots. The first screenshot subscriber
-  starts capture scheduling; the last one's departure cancels timers and skips queued captures.
-  An already running capture may finish. Demand applies to the service's owned sessions, not just
-  the selected session.
-- **Wire**: `GET /bsk-observation/events` is the live synchronization channel (SSE). Every connection,
-  including reconnects, starts with `{ type: "snapshot", sessions, available }`, followed by
-  `upsert`, `remove`, `reset`, and `availability` events on the same stream. Replace local state
-  with each snapshot before applying subsequent events. Use `?thumbnails=0` for state-only
-  subscriptions or `?thumbnails=1` to request screenshots; omitting the parameter defaults to
-  requesting screenshots for compatibility. Closing the stream releases its screenshot demand.
-  `GET /bsk-observation/state` remains a one-time `{ sessions, available }` read and does not
-  request screenshots. It has no ordering guarantee relative to a separate SSE connection;
-  live clients should initialize and resynchronize from the stream's snapshot instead.
-  The host also serves `POST /bsk-observation/interrupt`, `POST /bsk-observation/stop`, and
-  `GET /bsk-observation/thumbnail/<attachmentId>` through the dsh `webServer` route seam
-  (dsh 0.1's Typert Remote pipeline is closed to out-of-tree packages). All commands for one
-  session — tool calls and frame captures alike — run through a per-session FIFO, because the
-  daemon accepts only one unfinished command per session.
-- **Programmatic subscription**: `ObservationService.subscribe(listener, { thumbnails: false })`
-  subscribes to state without requesting screenshots. On an active service, the listener receives
-  the initial `snapshot` synchronously, before `subscribe` returns, then receives subsequent
-  changes. `thumbnails` defaults to `true`, so callers should choose it explicitly. The returned
-  unsubscribe function is safe to call repeatedly and releases this subscription's screenshot
-  demand. Subscribing after service disposal is a no-op.
-- **Trust model**: these routes expose live screenshots (and an interrupt write), so they
-  replicate the browser-trust fence dsh applies to its own `/api` routes: the request Host
-  must be a loopback authority (`localhost`, `127.0.0.0/8`, `[::1]`), a present Origin must
-  match the Host, `sec-fetch-site: cross-site` is refused, and POST requires an
-  `application/json` body (cross-site simple requests can never satisfy that). The channel is
-  therefore built for **loopback-only serving** — binding the dsh web server to `0.0.0.0` and
-  reaching it through a LAN address will (deliberately) fail the fence; do not put these
-  routes behind a non-loopback reverse proxy without adding your own authentication.
-- Configure with `observationEnabled` / `thumbnailIntervalMs` / `idleIntervalMs`.
+| Option | Default | Purpose |
+| --- | --- | --- |
+| `bskPath` | `bsk` | Path to the CLI binary. |
+| `defaultTimeoutMs` | `120000` | Default command timeout in milliseconds. |
+| `maxSessions` | `5` | Maximum concurrent sessions started by this plugin. |
+| `observationEnabled` | `true` | Enable live browser observation. |
+| `thumbnailIntervalMs` | `1500` | Screenshot interval for active sessions, in milliseconds. |
+| `idleIntervalMs` | `8000` | Screenshot interval for idle sessions and the recent-activity window, in milliseconds. |
+| `lazyTools` | `true` | Reveal the browser tools when the skill is invoked. Set `false` to register them at startup. |
 
-## Behavior notes
+With `lazyTools: true`, only the skill's catalog entry is initially advertised to
+the model. The six `browser_*` tool schemas are added to the system prompt after
+the `browser-skill` skill is successfully invoked, either by the model or through
+`/browser-skill`. Set `lazyTools: false` to make the tools available immediately.
 
-- **Cancellation**: aborting a tool call (`exec.signal`) kills the underlying bsk child process,
-  matching BrowserSkill's cooperative tool-cancellation model.
-- **UI cards**: calls render as terminal cards (command line as title, output as the completed
-  card). Screenshots additionally attach the image itself when the host mounts an attachment store
-  and the active model route declares image input; otherwise the PNG path is returned.
-- **Web UI toolview (browser half)**: the package is dual-face. `dsh.client` (platform `web`) ships
-  `lib/client.cjs`, which registers a keyed `tool.call.toolview` view for `browser_inspect`. The
-  custom view keeps a terminal block for every inspect action and, when a screenshot result carries
-  an image block, resolves the durable attachment through the client session's authorized
-  `readAttachment` RPC and renders it with the shared `MessageImage` thumbnail/lightbox atoms.
-  The other five tools keep the stock terminal card. The bundle follows the dsh client
-  contract: a CJS closure factory handed to `window.__ModuleLoader__.load`, platform modules
-  (`react`, `dsh-client-ui-*`) external, everything else inlined, CSS Modules compiled by
-  lightningcss.
-- **Errors**: non-zero bsk exits surface the CLI's JSON error envelope (`code`, `message`, `hint`)
-  so the model gets the daemon's actionable guidance.
-- **Long-running work** (e.g. `bsk record`) is not backgrounded via `ctx.jobs` yet — tracked as a
-  follow-up.
+## Live browser view
+
+The dsh Web UI shows the plugin's browser sessions in a floating panel. If your
+profile provides the `dsh-better-sidebar` integration, the view appears in a
+**Browser Skill** sidebar tab instead.
+
+- See the current action, elapsed time, and recent screenshot for each session.
+- Select a session to focus on it. The sidebar view follows the current conversation.
+- Use **Interrupt** to cancel the current browser command. The agent may continue
+  with another action afterward.
+- Drag or resize the floating panel, or use **Pop out** to open a Picture-in-Picture
+  window in browsers that support it.
+- Periodic screenshots are requested while a browser observation view is visible.
+  Configure the active and idle intervals with the options above.
+
+The observation endpoints require a loopback address such as `localhost` or
+`127.0.0.1`. Access through a LAN hostname or non-loopback reverse proxy is not supported.
 
 ## Development
 
@@ -195,22 +154,47 @@ pnpm --filter @wxg-prc-cpg/browser-skill-dsh-plugin test     # unit tests mock b
 pnpm --filter @wxg-prc-cpg/browser-skill-dsh-plugin build    # tsdown -> lib/
 ```
 
+See the [development notes](https://github.com/Tencent/BrowserSkill/blob/main/packages/dsh-plugin-browserskill/docs/development.md)
+for skill registration, tool results, and observation APIs in the current source.
+
 ## Publishing
 
-The GitHub Actions workflow **Release dsh plugin** publishes this package to npm
-as `@wxg-prc-cpg/browser-skill-dsh-plugin`. The Cordis plugin id, client
-bundle registration, and `cordis.patch.yml` name are the same specifier so
-dsh can import and materialize the plugin without a ModuleLoader id mismatch.
+The [Release dsh plugin workflow](https://github.com/Tencent/BrowserSkill/blob/main/.github/workflows/release-dsh-plugin.yml)
+publishes the package and this README to npm. Pushing a `dsh-plugin-vX.Y.Z` tag
+triggers it; ordinary commits to `main` do not.
 
-Trigger it by pushing a tag that matches `package.json`'s `version`:
+1. Commit this README and any other changes intended for the release.
+2. From the repository root, run the
+   [release script](https://github.com/Tencent/BrowserSkill/blob/main/scripts/release.mjs)
+   with a new stable version, replacing `<version>` below. The script updates the
+   CLI, extension, and DSH plugin versions, commits the version changes, and creates
+   their release tags:
 
-```sh
-git tag dsh-plugin-v0.1.2
-git push origin dsh-plugin-v0.1.2
-```
+   ```sh
+   node scripts/release.mjs <version>
+   ```
 
-Or run the workflow from the Actions tab (`workflow_dispatch`). The job reads the
-`NPM_TOKEN` secret from the `npm-publish` GitHub Environment.
+3. Push the version commit to the release branch, then push the DSH plugin tag
+   created by the script, using the same `<version>`:
+
+   ```sh
+   git push origin HEAD
+   git push origin dsh-plugin-v<version>
+   ```
+
+   This publishes the DSH plugin. Push the CLI and extension tags separately when
+   those components are ready for release.
+
+The workflow checks the version, runs typechecks and tests, builds the package,
+and publishes it to npm.
+
+You can also run the workflow manually from GitHub Actions on the intended release
+ref. Both triggers require an unpublished version and the `NPM_TOKEN` secret in the
+`npm-publish` GitHub Environment.
+
+npm updates the package README only when a new version is published, including
+for documentation-only changes. Published versions cannot be overwritten. See
+[npm's README update rules](https://docs.npmjs.com/about-package-readme-files/).
 
 ## License
 

packages/dsh-plugin-browserskill/docs/development.md

@@ -0,0 +1,90 @@
+# DSH plugin development notes
+
+For installation, usage, and configuration, see the [plugin README](../README.md).
+These notes describe the current source on this branch; a published npm version may
+not include later changes.
+
+## Tool execution
+
+The plugin runs the `bsk` CLI and parses its JSON output. The daemon and browser
+extension perform the browser operations. The published package name is also the
+Cordis plugin id, client bundle registration id, and `cordis.patch.yml` plugin name.
+Keep these identifiers aligned so dsh can load both halves of the plugin.
+
+## Agent skill
+
+Beyond the tools, the plugin publishes the **`browser-skill` agent skill** through the harness's
+official skill seam (`ctx.skills.register`): the catalog entry (name + routing description) is
+resident in `<available_skills>`, and the body is loaded only when the model invokes the `skill`
+tool. Its single source is the DSH-specific `skill/SKILL.md`, which documents only structured
+`browser_*` calls and their plugin semantics. The repository-root CLI skill is intentionally not
+concatenated: its command examples belong to a different execution interface and would bypass
+the plugin's ownership, live observation UI, cancellation, and cleanup path if followed directly.
+The build rejects internal CLI-name leakage, command-line code blocks, unknown browser tools, and
+missing supported browser tools before embedding the Markdown. Registration and every pre-step
+catalog snapshot are pure in-memory reads (no disk/process/daemon); compositions without the skill
+seam degrade silently.
+
+With `lazyTools: true`, the six tool schemas stay out of the system prompt until
+the skill is successfully invoked. Registration happens once and lasts until the
+plugin is unloaded. Repeated invocations do not register duplicate tools. Entering
+a resumed conversation whose history contains a successful skill invocation also
+registers the tools. Setting `lazyTools: false` registers them at plugin startup.
+
+## Observation subscriptions and routes
+
+- **Screenshot demand**: the client requests periodic screenshots while an observation view is
+  visible, using the PiP document's visibility when popped out. Hidden or collapsed views can
+  keep subscribing to state without requesting screenshots. The first screenshot subscriber
+  starts capture scheduling; the last one's departure cancels timers and skips queued captures.
+  An already running capture may finish. Demand applies to the service's owned sessions, not just
+  the selected session.
+- **Wire**: `GET /bsk-observation/events` is the live synchronization channel (SSE). Every connection,
+  including reconnects, starts with `{ type: "snapshot", sessions, available }`, followed by
+  `upsert`, `remove`, `reset`, and `availability` events on the same stream. Replace local state
+  with each snapshot before applying subsequent events. Use `?thumbnails=0` for state-only
+  subscriptions or `?thumbnails=1` to request screenshots; omitting the parameter defaults to
+  requesting screenshots for compatibility. Closing the stream releases its screenshot demand.
+  `GET /bsk-observation/state` remains a one-time `{ sessions, available }` read and does not
+  request screenshots. It has no ordering guarantee relative to a separate SSE connection;
+  live clients should initialize and resynchronize from the stream's snapshot instead.
+  The host also serves `POST /bsk-observation/interrupt`, `POST /bsk-observation/stop`, and
+  `GET /bsk-observation/thumbnail/<attachmentId>` through the dsh `webServer` route seam
+  (dsh 0.1's Typert Remote pipeline is closed to out-of-tree packages). All commands for one
+  session — tool calls and frame captures alike — run through a per-session FIFO, because the
+  daemon accepts only one unfinished command per session.
+- **Programmatic subscription**: `ObservationService.subscribe(listener, { thumbnails: false })`
+  subscribes to state without requesting screenshots. On an active service, the listener receives
+  the initial `snapshot` synchronously, before `subscribe` returns, then receives subsequent
+  changes. `thumbnails` defaults to `true`, so callers should choose it explicitly. The returned
+  unsubscribe function is safe to call repeatedly and releases this subscription's screenshot
+  demand. Subscribing after service disposal is a no-op.
+- **Trust model**: these routes expose live screenshots (and an interrupt write), so they
+  replicate the browser-trust fence dsh applies to its own `/api` routes: the request Host
+  must be a loopback authority (`localhost`, `127.0.0.0/8`, `[::1]`), a present Origin must
+  match the Host, `sec-fetch-site: cross-site` is refused, and POST requires an
+  `application/json` body (cross-site simple requests can never satisfy that). The channel is
+  therefore built for **loopback-only serving** — binding the dsh web server to `0.0.0.0` and
+  reaching it through a LAN address will (deliberately) fail the fence; do not put these
+  routes behind a non-loopback reverse proxy without adding your own authentication.
+
+## Tool results and cancellation
+
+- **Cancellation**: aborting a tool call (`exec.signal`) kills the underlying bsk child process,
+  matching BrowserSkill's cooperative tool-cancellation model.
+- **UI cards**: calls render as terminal cards (command line as title, output as the completed
+  card). Screenshots additionally attach the image itself when the host mounts an attachment store
+  and the active model route declares image input; otherwise the PNG path is returned.
+- **Web UI toolview (browser half)**: the package is dual-face. `dsh.client` (platform `web`) ships
+  `lib/client.cjs`, which registers a keyed `tool.call.toolview` view for `browser_inspect`. The
+  custom view keeps a terminal block for every inspect action and, when a screenshot result carries
+  an image block, resolves the durable attachment through the client session's authorized
+  `readAttachment` RPC and renders it with the shared `MessageImage` thumbnail/lightbox atoms.
+  The other five tools keep the stock terminal card. The bundle follows the dsh client
+  contract: a CJS closure factory handed to `window.__ModuleLoader__.load`, platform modules
+  (`react`, `dsh-client-ui-*`) external, everything else inlined, CSS Modules compiled by
+  lightningcss.
+- **Errors**: non-zero bsk exits surface the CLI's JSON error envelope (`code`, `message`, `hint`)
+  so the model gets the daemon's actionable guidance.
+- **Long-running work** (e.g. `bsk record`) is not backgrounded via `ctx.jobs` yet — tracked as a
+  follow-up.

packages/dsh-plugin-browserskill/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@wxg-prc-cpg/browser-skill-dsh-plugin",
   "description": "DeepSeek Harness tool plugin that exposes BrowserSkill browser automation (browser_* tools) to the model",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "license": "MIT",
   "publishConfig": {
     "access": "public",

packages/dsh-plugin-browserskill/src/runner.ts

@@ -5,7 +5,7 @@
  * map the CLI's JSON error envelope onto a thrown `BskError`.
  */
 
-import { type ChildProcess, spawn } from "node:child_process";
+import { type ChildProcess, type SpawnOptionsWithoutStdio, spawn } from "node:child_process";
 
 /** Shape of the JSON error envelope `bsk --json` prints on failure. */
 export interface BskErrorBody {
@@ -53,7 +53,11 @@ export interface BskRunOptions {
 }
 
 /** Minimal spawn signature so tests can substitute a fake child process. */
-export type SpawnImpl = (command: string, args: string[]) => ChildProcess;
+export type SpawnImpl = (
+  command: string,
+  args: string[],
+  options?: SpawnOptionsWithoutStdio,
+) => ChildProcess;
 
 export interface BskRunner {
   /** Run `bsk <args...> --json` and collect its output. */
@@ -64,29 +68,66 @@ export interface BskRunner {
   killFor(tag: string): number;
 }
 
-// Business RPCs translate SIGINT into the daemon's cancel(rpc_id) protocol.
-// Give that bounded reconciliation path time to settle before the hard kill.
+// Business RPCs translate Ctrl-C / opt-in stdin EOF into cancel(rpc_id).
+// Allow reconciliation before hard-killing an old or unresponsive CLI.
 const KILL_GRACE_MS = 3000;
+// Windows IPC may spend 5s connecting, 2s cancelling, 2s settling,
+// and up to 5s releasing the entire batch of caller-owned transfers.
+const WINDOWS_KILL_GRACE_MS = 15_000;
 const SESSION_BUSY_RETRY_DELAY_MS = 100;
 
 export function createBskRunner(bskPath: string, spawnImpl: SpawnImpl = spawn): BskRunner {
   const live = new Map<ChildProcess, string | undefined>();
+  const windows = process.platform === "win32";
+  const cancelling = new Set<ChildProcess>();
 
   function killChild(child: ChildProcess): void {
-    if (child.exitCode !== null || child.signalCode !== null) return;
-    child.kill("SIGINT");
-    const force = setTimeout(() => {
-      if (child.exitCode === null && child.signalCode === null) child.kill("SIGKILL");
-    }, KILL_GRACE_MS);
+    if (child.exitCode !== null || child.signalCode !== null || cancelling.has(child)) return;
+    cancelling.add(child);
+    // Node kills Windows children outright for SIGINT. EOF asks the CLI to
+    // send its existing cancel RPC and wait for browser reconciliation.
+    if (windows && child.stdin) child.stdin.end();
+    else child.kill("SIGINT");
+    const force = setTimeout(
+      () => {
+        if (child.exitCode === null && child.signalCode === null) child.kill("SIGKILL");
+      },
+      windows ? WINDOWS_KILL_GRACE_MS : KILL_GRACE_MS,
+    );
     force.unref();
+    child.once("close", () => {
+      clearTimeout(force);
+      cancelling.delete(child);
+    });
   }
 
   return {
     run(args, options = {}) {
+      if (options.signal?.aborted) {
+        return Promise.resolve({
+          code: null,
+          stdout: "",
+          stderr: "",
+          timedOut: false,
+          aborted: true,
+        });
+      }
       return new Promise<BskRunResult>((resolve, reject) => {
         let child: ChildProcess;
         try {
-          child = spawnImpl(bskPath, [...args, "--json"]);
+          child = spawnImpl(
+            bskPath,
+            [...args, "--json"],
+            windows
+              ? {
+                  windowsHide: true,
+                  env: { ...process.env, BSK_CANCEL_ON_STDIN_CLOSE: "1" },
+                }
+              : undefined,
+          );
+          // A child exiting while cancellation closes stdin may report EPIPE.
+          // Its close/error event remains the authority for the run result.
+          child.stdin?.on("error", () => {});
         } catch (error) {
           reject(error);
           return;

packages/dsh-plugin-browserskill/tests/runner.test.ts

@@ -1,6 +1,7 @@
 import type { ChildProcess } from "node:child_process";
 import { EventEmitter } from "node:events";
-import { describe, expect, it } from "vitest";
+import { PassThrough } from "node:stream";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import {
   type BskRunResult,
   createBskRunner,
@@ -92,6 +93,77 @@ describe("createBskRunner", () => {
   });
 });
 
+describe("Windows parent cancellation", () => {
+  const originalPlatform = Object.getOwnPropertyDescriptor(process, "platform")!;
+  beforeEach(() => Object.defineProperty(process, "platform", { value: "win32" }));
+  afterEach(() => {
+    Object.defineProperty(process, "platform", originalPlatform);
+    vi.useRealTimers();
+  });
+
+  it("opts in to stdin cancellation and waits for CLI reconciliation", async () => {
+    const child = Object.assign(new FakeChild(), { stdin: new PassThrough() });
+    const spawn = vi.fn(() => child as unknown as ChildProcess);
+    const runner = createBskRunner("bsk", spawn);
+    const abort = new AbortController();
+    const result = runner.run(["snapshot"], { signal: abort.signal });
+    expect(spawn.mock.calls[0]).toEqual([
+      "bsk",
+      ["snapshot", "--json"],
+      {
+        windowsHide: true,
+        env: { ...process.env, BSK_CANCEL_ON_STDIN_CLOSE: "1" },
+      },
+    ]);
+    abort.abort();
+    expect(child.stdin.writableEnded).toBe(true);
+    expect(child.killedWith).toEqual([]);
+    // Closing an already-exited child's pipe must not crash the host.
+    child.stdin.emit("error", Object.assign(new Error("closed"), { code: "EPIPE" }));
+    child.finish(2, '{"code":"cancelled"}');
+    expect(await result).toMatchObject({ code: 2, aborted: true });
+  });
+
+  it("bounds cancellation of an old or unresponsive CLI", async () => {
+    vi.useFakeTimers();
+    const child = Object.assign(new FakeChild(), { stdin: new PassThrough() });
+    const runner = createBskRunner("bsk", fakeSpawn([child]));
+    const result = runner.run(["snapshot"], { timeoutMs: 5 });
+    await vi.advanceTimersByTimeAsync(5);
+    expect(child.stdin.writableEnded).toBe(true);
+    expect(child.killedWith).toEqual([]);
+    await vi.advanceTimersByTimeAsync(10_000);
+    expect(child.killedWith).toEqual([]);
+    await vi.advanceTimersByTimeAsync(5_000);
+    expect(child.killedWith).toEqual(["SIGKILL"]);
+    expect(await result).toMatchObject({ timedOut: true });
+  });
+
+  it("cancels only the requested tag and clears the fallback after exit", async () => {
+    vi.useFakeTimers();
+    const a = Object.assign(new FakeChild(), { stdin: new PassThrough() });
+    const b = Object.assign(new FakeChild(), { stdin: new PassThrough() });
+    const runner = createBskRunner("bsk", fakeSpawn([a, b]));
+    const first = runner.run(["snapshot"], { tag: "a" });
+    const second = runner.run(["snapshot"], { tag: "b" });
+    expect(runner.killFor("a")).toBe(1);
+    expect(a.stdin.writableEnded).toBe(true);
+    expect(b.stdin.writableEnded).toBe(false);
+    a.finish(2);
+    b.finish(0);
+    await Promise.all([first, second]);
+    expect(vi.getTimerCount()).toBe(0);
+  });
+
+  it("does not start work for an already-aborted call", async () => {
+    const spawn = vi.fn();
+    const runner = createBskRunner("bsk", spawn);
+    const signal = AbortSignal.abort();
+    expect(await runner.run(["snapshot"], { signal })).toMatchObject({ aborted: true });
+    expect(spawn).not.toHaveBeenCalled();
+  });
+});
+
 describe("parseBskJson", () => {
   const base: BskRunResult = { code: 0, stdout: "", stderr: "", timedOut: false, aborted: false };
 

scripts/install-windows.test.ps1

@@ -0,0 +1,135 @@
+#Requires -Version 5.1
+param([string]$BskPath = (Join-Path $PSScriptRoot "../target/debug/bsk.exe"))
+$ErrorActionPreference = "Stop"
+
+# Load definitions, never Main: no downloads or changes to the real user PATH.
+$installer = Join-Path $PSScriptRoot "../install.ps1"
+$tokens = $null
+$errors = $null
+$ast = [System.Management.Automation.Language.Parser]::ParseFile($installer, [ref]$tokens, [ref]$errors)
+if ($errors.Count) { throw ($errors | Out-String) }
+foreach ($statement in $ast.EndBlock.Statements) {
+    if ($statement -is [System.Management.Automation.Language.FunctionDefinitionAst]) {
+        $definition = $statement.Extent.Text
+        if ($statement.Name -eq "Add-ToUserPath") {
+            $definition = $definition.Replace('[Environment]::GetEnvironmentVariable("PATH", "User")', '$script:UserPath')
+            $definition = $definition.Replace('[Environment]::SetEnvironmentVariable("PATH", $newUserPath, "User")', '$script:UserPath = $newUserPath')
+        }
+        Invoke-Expression $definition
+    }
+}
+function Assert-Equal($Actual, $Expected) {
+    if ($Actual -cne $Expected) { throw "expected [$Expected], got [$Actual]" }
+}
+function Assert-Fails([scriptblock]$Action) {
+    $failed = $false
+    try { & $Action } catch { $failed = $true }
+    if (-not $failed) { throw "expected failure" }
+}
+
+$dir = 'C:\Users\Alice\.local\bin'
+foreach ($existing in @('', 'C:\WindowsApps', 'C:\A;C:\B')) {
+    $script:UserPath = $existing
+    Add-ToUserPath $dir
+    $expected = if ($existing) { "$existing;$dir" } else { $dir }
+    Assert-Equal $script:UserPath $expected
+    Add-ToUserPath $dir
+    Assert-Equal $script:UserPath $expected
+}
+
+$root = Join-Path ([IO.Path]::GetTempPath()) ("bsk-install-test-" + [Guid]::NewGuid().ToString('N'))
+[IO.Directory]::CreateDirectory($root) | Out-Null
+$oldBskHome = $env:BSK_HOME
+$oldAutoUpdate = $env:BSK_AUTO_UPDATE
+$daemon = $null
+try {
+    $utf8 = New-Object System.Text.UTF8Encoding($false)
+    $bashRc = Join-Path $root ".bashrc"
+    $existing = "# existing 中文 configuration" + [char]10
+    [IO.File]::WriteAllText($bashRc, $existing, $utf8)
+    $special = 'C:\Users\张三 space $HOME $(echo unsafe) ! & [x] O''Brien\.local\bin'
+    Add-ToBashProfile $special $bashRc
+    $first = [IO.File]::ReadAllText($bashRc)
+    if (-not $first.StartsWith($existing)) { throw "existing bashrc content changed" }
+    if (-not $first.Contains('张三')) { throw "Unicode path was lost" }
+    Add-ToBashProfile $special $bashRc
+    Assert-Equal ([IO.File]::ReadAllText($bashRc)) $first
+    $bytes = [IO.File]::ReadAllBytes($bashRc)
+    if ($bytes[0] -eq 0xEF) { throw "unexpected UTF-8 BOM" }
+
+    $bash = [IO.Path]::GetFullPath((Join-Path (Split-Path (Get-Command git).Source -Parent) "../bin/bash.exe"))
+    if (-not (Test-Path -LiteralPath $bash)) { throw "Git Bash is required for quoting regression" }
+    $env:BSK_TEST_RC = $bashRc
+    $probe = Join-Path $root 'probe.sh'
+    [IO.File]::WriteAllText($probe, 'source "$BSK_TEST_RC"; printf "%s\n" "${PATH%%:*}"', $utf8)
+    $actual = & $bash --noprofile --norc $probe
+    if ($LASTEXITCODE -ne 0) { throw "Git Bash failed" }
+    Assert-Equal $actual ('/c' + $special.Substring(2).Replace('\', '/'))
+
+    $env:BSK_HOME = Join-Path $root "home"
+    $env:BSK_AUTO_UPDATE = "off"
+    [IO.Directory]::CreateDirectory($env:BSK_HOME) | Out-Null
+    $sourceDir = Join-Path $root "download"
+    [IO.Directory]::CreateDirectory($sourceDir) | Out-Null
+    $source = Join-Path $sourceDir "bsk.exe"
+    [IO.File]::Copy((Resolve-Path -LiteralPath $BskPath).Path, $source)
+    $targetDir = Join-Path $root "中文 space [x] & install"
+    [IO.Directory]::CreateDirectory($targetDir) | Out-Null
+    $target = Join-Path $targetDir "bsk.exe"
+    Install-Binary $source $target
+    Assert-Equal (Get-FileHash -LiteralPath $target).Hash (Get-FileHash -LiteralPath $source).Hash
+
+    $daemon = Start-Process -FilePath $target -ArgumentList @('daemon', 'start', '--foreground', '--port', '0') -WindowStyle Hidden -PassThru
+    $infoPath = Join-Path $env:BSK_HOME "daemon.json"
+    $deadline = [DateTime]::UtcNow.AddSeconds(15)
+    while (-not [IO.File]::Exists($infoPath)) {
+        if ($daemon.HasExited -or [DateTime]::UtcNow -gt $deadline) { throw "daemon failed to start" }
+        Start-Sleep -Milliseconds 50
+    }
+    # PE overlays distinguish old/new executables without another build.
+    $stream = [IO.File]::OpenWrite($source)
+    try {
+        $stream.Seek(0, [IO.SeekOrigin]::End) | Out-Null
+        $marker = $utf8.GetBytes("installer replacement regression")
+        $stream.Write($marker, 0, $marker.Length)
+    } finally { $stream.Dispose() }
+    Install-Binary $source $target
+    if (-not $daemon.WaitForExit(5000)) { throw "old daemon still running" }
+    Assert-Equal (Get-FileHash -LiteralPath $target).Hash (Get-FileHash -LiteralPath $source).Hash
+    & $target --version
+    if ($LASTEXITCODE -ne 0) { throw "replacement is not executable" }
+
+    # Refuse replacement when daemon identity cannot be verified.
+    [IO.File]::WriteAllText($infoPath, 'invalid daemon metadata')
+    $before = (Get-FileHash -LiteralPath $target).Hash
+    Assert-Fails { Install-Binary $source $target }
+    Assert-Equal (Get-FileHash -LiteralPath $target).Hash $before
+    [IO.File]::Delete($infoPath)
+
+    # A remaining lock must fail without truncation or staging debris.
+    $lock = [IO.File]::Open($target, [IO.FileMode]::Open, [IO.FileAccess]::Read, [IO.FileShare]::None)
+    try { Assert-Fails { Install-Binary $source $target } } finally { $lock.Dispose() }
+    Assert-Equal (Get-FileHash -LiteralPath $target).Hash $before
+    if (@(Get-ChildItem -LiteralPath $targetDir -Filter "*.install-*").Count) { throw "staging files leaked" }
+    Write-Host "Windows installer regressions passed ($($PSVersionTable.PSVersion))"
+}
+catch {
+    Write-Host ($_ | Out-String)
+    Write-Host $_.ScriptStackTrace
+    throw
+}
+finally {
+    if ($daemon -and -not $daemon.HasExited) {
+        Stop-Process -Id $daemon.Id -Force
+        $daemon.WaitForExit(5000) | Out-Null
+    }
+    $env:BSK_HOME = $oldBskHome
+    $env:BSK_AUTO_UPDATE = $oldAutoUpdate
+    Remove-Item Env:BSK_TEST_RC -ErrorAction SilentlyContinue
+    # Resolve and verify before recursive cleanup; only this fixture is removed.
+    $resolvedRoot = [IO.Path]::GetFullPath($root)
+    $tempRoot = [IO.Path]::GetFullPath([IO.Path]::GetTempPath()).TrimEnd('\') + '\'
+    if (-not $resolvedRoot.StartsWith($tempRoot, [StringComparison]::OrdinalIgnoreCase) -or
+        -not ([IO.Path]::GetFileName($resolvedRoot)).StartsWith('bsk-install-test-')) { throw "invalid cleanup path" }
+    Remove-Item -LiteralPath $resolvedRoot -Recurse -Force
+}

scripts/release.mjs

@@ -174,16 +174,22 @@ function updateChangelog(version) {
 
   const today = new Date().toISOString().slice(0, 10);
   const escapedVer = version.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
+  const versionHeading = new RegExp(`^## \\[${escapedVer}\\](?:\\s|$)`, "m");
 
   // First: fill in any date-placeholder line for this version (e.g. "## [0.2.0] - 2026-09-XX")
   const versionPlaceholder = new RegExp(`^## \\[${escapedVer}\\]\\s*-\\s*\\d{4}-\\d{2}-XX`, "m");
   if (versionPlaceholder.test(content)) {
     content = content.replace(versionPlaceholder, `## [${version}] - ${today}`);
-  } else {
-    // Otherwise: insert a new section after [Unreleased]
+  } else if (!versionHeading.test(content)) {
+    // Preserve prepared release entries; new versions go before the release history.
+    const heading = `## [${version}] - ${today}`;
     const unreleased = /^## \[Unreleased\]/m;
     if (unreleased.test(content)) {
-      content = content.replace(unreleased, `## [Unreleased]\n\n## [${version}] - ${today}`);
+      content = content.replace(unreleased, `## [Unreleased]\n\n${heading}`);
+    } else if (/^## /m.test(content)) {
+      content = content.replace(/^## /m, `${heading}\n\n## `);
+    } else {
+      content = `${content.trimEnd()}\n\n${heading}\n`;
     }
   }