feat: Native PowerShell integration with shared shell abstraction

crates/forge_app/src/transformers/strip_working_dir.rs

@@ -347,7 +347,7 @@ mod tests {
 
         // On Windows, paths are recognized and stripped
         #[cfg(windows)]
-        let expected = ContextSummary::new(vec![SummaryMessage::new(
+        let expected = ContextSummary::new(vec![SummaryBlock::new(
             Role::Assistant,
             vec![
                 SummaryToolCall::read(r"src\main.rs").into(),
@@ -402,7 +402,7 @@ mod tests {
         let actual = StripWorkingDir::new(r"C:\Users\user\project").transform(fixture);
 
         #[cfg(windows)]
-        let expected = ContextSummary::new(vec![SummaryMessage::new(
+        let expected = ContextSummary::new(vec![SummaryBlock::new(
             Role::Assistant,
             vec![
                 SummaryToolCall::read(r"src\main.rs").into(),
@@ -435,7 +435,7 @@ mod tests {
         let actual = StripWorkingDir::new(r"C:\Users\user\project").transform(fixture);
 
         #[cfg(windows)]
-        let expected = ContextSummary::new(vec![SummaryMessage::new(
+        let expected = ContextSummary::new(vec![SummaryBlock::new(
             Role::Assistant,
             vec![
                 SummaryToolCall::read(r"src\main.rs").into(),
@@ -469,7 +469,7 @@ mod tests {
         let actual = StripWorkingDir::new(r"\\server\share\project").transform(fixture);
 
         #[cfg(windows)]
-        let expected = ContextSummary::new(vec![SummaryMessage::new(
+        let expected = ContextSummary::new(vec![SummaryBlock::new(
             Role::Assistant,
             vec![
                 SummaryToolCall::read(r"src\main.rs").into(),
@@ -498,7 +498,7 @@ mod tests {
         let actual = StripWorkingDir::new(r"C:\Users\user\project\").transform(fixture);
 
         #[cfg(windows)]
-        let expected = ContextSummary::new(vec![SummaryMessage::new(
+        let expected = ContextSummary::new(vec![SummaryBlock::new(
             Role::Assistant,
             vec![SummaryToolCall::read(r"src\main.rs").into()],
         )]);
@@ -529,7 +529,7 @@ mod tests {
         // On Unix: case-sensitive matching, neither path strips (Windows paths not
         // recognized)
         #[cfg(windows)]
-        let expected = ContextSummary::new(vec![SummaryMessage::new(
+        let expected = ContextSummary::new(vec![SummaryBlock::new(
             Role::Assistant,
             vec![
                 SummaryToolCall::read(r"src\main.rs").into(),
@@ -572,18 +572,18 @@ mod tests {
 
         #[cfg(windows)]
         let expected = ContextSummary::new(vec![
-            SummaryMessage::new(
+            SummaryBlock::new(
                 Role::User,
                 vec![SummaryToolCall::read(r"src\main.rs").into()],
             ),
-            SummaryMessage::new(
+            SummaryBlock::new(
                 Role::Assistant,
                 vec![
                     SummaryToolCall::read(r"src\lib.rs").into(),
                     SummaryToolCall::update("README.md").into(),
                 ],
             ),
-            SummaryMessage::new(Role::User, vec![SummaryToolCall::remove("old.rs").into()]),
+            SummaryBlock::new(Role::User, vec![SummaryToolCall::remove("old.rs").into()]),
         ]);
 
         #[cfg(not(windows))]

crates/forge_app/src/workspace_status.rs

@@ -136,7 +136,10 @@ fn absolutize(base_dir: &Path, path: &str) -> String {
     if p.is_absolute() {
         path.to_owned()
     } else {
-        base_dir.join(p).to_string_lossy().into_owned()
+        // Use forward slashes for joined paths to ensure consistent path
+        // separators across platforms (workspace paths are not OS-specific).
+        let joined = base_dir.join(p).to_string_lossy().into_owned();
+        joined.replace('\\', "/")
     }
 }
 

crates/forge_domain/src/snapshot.rs

@@ -116,7 +116,10 @@ mod tests {
 
     #[test]
     fn test_create_with_nonexistent_absolute_path() {
-        // Test with a non-existent absolute path
+        // Test with a non-existent absolute path (platform-appropriate)
+        #[cfg(windows)]
+        let nonexistent_path = PathBuf::from(r"C:\this\path\does\not\exist\file.txt");
+        #[cfg(not(windows))]
         let nonexistent_path = PathBuf::from("/this/path/does/not/exist/file.txt");
         let snapshot = Snapshot::create(nonexistent_path.clone()).unwrap();
 

crates/forge_infra/src/executor.rs

@@ -269,7 +269,8 @@ mod tests {
         };
 
         if cfg!(target_os = "windows") {
-            expected.stdout = format!("'{}'", expected.stdout);
+            // cmd.exe does not strip single quotes, so they appear in the output
+            expected.stdout = "'hello world'\n".to_string();
         }
 
         assert_eq!(actual.stdout.trim(), expected.stdout.trim());
@@ -411,7 +412,8 @@ mod tests {
         };
 
         if cfg!(target_os = "windows") {
-            expected.stdout = format!("'{}'", expected.stdout);
+            // cmd.exe does not strip single quotes, so they appear in the output
+            expected.stdout = "'silent test'\n".to_string();
         }
 
         // The output should still be captured in the CommandOutput

crates/forge_main/src/cli.rs

@@ -86,6 +86,10 @@ pub enum TopLevelCommand {
     #[command(subcommand, alias = "extension")]
     Zsh(ZshCommandGroup),
 
+    /// PowerShell integration (native on Windows).
+    #[command(subcommand, alias = "pwsh")]
+    Powershell(PowershellCommandGroup),
+
     /// List agents, models, providers, tools, or MCP servers.
     List(ListCommandGroup),
 
@@ -388,6 +392,28 @@ pub enum ZshCommandGroup {
     Keyboard,
 }
 
+/// PowerShell integration commands (native on Windows).
+#[derive(Subcommand, Debug, Clone)]
+pub enum PowershellCommandGroup {
+    /// Generate shell plugin script for eval.
+    Plugin,
+
+    /// Generate shell theme script for eval.
+    Theme,
+
+    /// Run diagnostics on PowerShell environment.
+    Doctor,
+
+    /// Get rprompt information (ANSI colors for PowerShell prompt).
+    Rprompt,
+
+    /// Setup PowerShell integration by updating $PROFILE.
+    Setup,
+
+    /// Show keyboard shortcuts for PowerShell.
+    Keyboard,
+}
+
 /// Command group for MCP server management.
 #[derive(Parser, Debug, Clone)]
 pub struct McpCommandGroup {

crates/forge_main/src/lib.rs

@@ -8,8 +8,10 @@ mod info;
 mod input;
 mod model;
 mod porcelain;
+mod powershell;
 mod prompt;
 mod sandbox;
+mod shell;
 mod state;
 mod stream_renderer;
 mod sync_display;

crates/forge_main/src/powershell/mod.rs

@@ -0,0 +1,16 @@
+//! PowerShell shell integration.
+//!
+//! This module provides PowerShell-specific functionality including:
+//! - Plugin generation and installation
+//! - Theme generation
+//! - Shell diagnostics
+//! - Right prompt (rprompt) display using ANSI escape codes
+
+mod plugin;
+mod rprompt;
+
+pub use plugin::{
+    generate_powershell_plugin, generate_powershell_theme, run_powershell_doctor,
+    run_powershell_keyboard, setup_powershell_integration,
+};
+pub use rprompt::PowerShellRPrompt;