Recognize PowerShell Get-Content file reads (#38415)

## What changed

- Classify simple PowerShell `Get-Content` commands, including `gc` and `type` aliases, as file reads while preserving Windows paths.
- Reuse the shared classification for implicit skill invocation detection on Windows and render recognized commands as `Read <file>` in the TUI.
- Leave commands with unsupported flags, multiple operands, wildcards, or expressions unclassified.

## Testing

- Cover supported and rejected PowerShell forms, Windows executor skill detection, and the TUI read summary.

GitOrigin-RevId: 4e8f5470f2ae31c08d74091f9634c2926e516ccf

codex-rs/core/tests/suite/skills_extension.rs

@@ -53,7 +53,6 @@ use core_test_support::responses::mount_sse_once;
 use core_test_support::responses::sse;
 use core_test_support::skip_if_no_network;
 use core_test_support::skip_if_remote;
-use core_test_support::skip_if_target_windows;
 use core_test_support::skip_if_wine_exec;
 use core_test_support::test_codex::test_codex;
 use core_test_support::wait_for_mcp_server;
@@ -1241,7 +1240,6 @@ async fn production_turn_aliases_executor_skill_roots() -> Result<()> {
 
 #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
 async fn executor_skill_invocation_is_environment_scoped_and_deduplicated() -> Result<()> {
-    skip_if_target_windows!(Ok(()), "executes a POSIX cat command");
     skip_if_remote!(Ok(()), "executor fixture uses a host-local skill path");
     skip_if_no_network!(Ok(()));
 
@@ -1280,8 +1278,13 @@ async fn executor_skill_invocation_is_environment_scoped_and_deduplicated() -> R
         ],
         warnings: Vec::new(),
     };
+    let read_command = if cfg!(windows) {
+        format!("Get-Content -LiteralPath \"{}\"", skill_path.display())
+    } else {
+        format!("cat {}", skill_path.display())
+    };
     let command = json!({
-        "cmd": format!("cat {}", skill_path.display()),
+        "cmd": read_command,
         "login": false,
     })
     .to_string();

codex-rs/shell-command/src/parse_command.rs

@@ -12,6 +12,30 @@ pub fn shlex_join(tokens: &[String]) -> String {
         .unwrap_or_else(|_| "<command included NUL byte>".to_string())
 }
 
+/// Tokenizes a PowerShell command while preserving Windows paths and reader aliases.
+pub fn tokenize_powershell_command(command: &str) -> Vec<String> {
+    let normalized = command.replace('\\', "/");
+    let mut tokens = shlex_split(&normalized)
+        .unwrap_or_else(|| normalized.split_whitespace().map(str::to_string).collect());
+    if let Some(executable) = tokens.first_mut()
+        && matches!(
+            executable.to_ascii_lowercase().as_str(),
+            "get-content" | "gc" | "type"
+        )
+    {
+        *executable = "Get-Content".to_owned();
+        // POSIX shlex must not silently rewrite a PowerShell file path.
+        if tokens
+            .iter()
+            .skip(1)
+            .any(|argument| !normalized.contains(argument))
+        {
+            return Vec::new();
+        }
+    }
+    tokens
+}
+
 /// Extracts the shell and script from a command, regardless of platform
 pub fn extract_shell_command(command: &[String]) -> Option<(&str, &str)> {
     extract_bash_command(command).or_else(|| extract_powershell_command(command))
@@ -1245,6 +1269,102 @@ mod tests {
         );
     }
 
+    #[test]
+    fn powershell_file_reads_are_classified() {
+        for (shell, script, path) in [
+            (
+                "powershell",
+                r"Get-Content C:\skills\demo\SKILL.md",
+                "C:/skills/demo/SKILL.md",
+            ),
+            (
+                "powershell",
+                r#"get-content -Raw "C:\skills and plugins\SKILL.md""#,
+                "C:/skills and plugins/SKILL.md",
+            ),
+            (
+                "powershell",
+                r"Get-Content 'C:\skills and plugins\SKILL.md'",
+                "C:/skills and plugins/SKILL.md",
+            ),
+            (
+                "powershell",
+                r"Get-Content -Path C:\skills\demo\SKILL.md",
+                "C:/skills/demo/SKILL.md",
+            ),
+            (
+                "powershell",
+                r"Get-Content -LiteralPath C:\skills\demo\SKILL.md",
+                "C:/skills/demo/SKILL.md",
+            ),
+            (
+                "powershell",
+                r"Get-Content C:\skills\demo\SKILL.md -Raw",
+                "C:/skills/demo/SKILL.md",
+            ),
+            (
+                "powershell",
+                r"Get-Content -Raw -LiteralPath C:\skills\demo\SKILL.md",
+                "C:/skills/demo/SKILL.md",
+            ),
+            (
+                "powershell",
+                r"Get-Content C:\workspace\README.md",
+                "C:/workspace/README.md",
+            ),
+            (
+                "powershell",
+                "gc C:/skills/demo/SKILL.md",
+                "C:/skills/demo/SKILL.md",
+            ),
+            (
+                "powershell",
+                "type C:/skills/demo/SKILL.md",
+                "C:/skills/demo/SKILL.md",
+            ),
+            (
+                r"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe",
+                "Get-Content C:/skills/demo/SKILL.md",
+                "C:/skills/demo/SKILL.md",
+            ),
+        ] {
+            assert_parsed(
+                &vec_str(&[shell, "-NoProfile", "-Command", script]),
+                vec![ParsedCommand::Read {
+                    cmd: script.to_string(),
+                    name: PathBuf::from(path)
+                        .file_name()
+                        .expect("file path")
+                        .to_string_lossy()
+                        .into_owned(),
+                    path: PathBuf::from(path),
+                }],
+            );
+        }
+    }
+
+    #[test]
+    fn complex_powershell_file_reads_are_intentionally_not_classified() {
+        for script in [
+            r"Get-Content 'C:\Users\O''Brien\skill\SKILL.md'",
+            r#"Get-Content "$(Remove-Item C:/important)/skills/demo/SKILL.md""#,
+            "Get-Content -ReadCount:([IO.File]::Delete('C:/important')) C:/skills/demo/SKILL.md",
+            "Get-Content C:/Users/Alice/.ssh/id_rsa,C:/skills/demo/SKILL.md",
+            "Get-Content C:/skills/demo/SKILL.md -Raw; Remove-Item C:/important",
+            "Get-Content C:/skills/demo/SKILL.md C:/important",
+            "Get-Content C:/skills/*/SKILL.md",
+            "Get-Content -Encoding UTF8 C:/skills/demo/SKILL.md",
+            "Get-Content -Raw",
+        ] {
+            assert_parsed(
+                &vec_str(&["powershell", "-Command", script]),
+                vec![ParsedCommand::Unknown {
+                    cmd: script.to_string(),
+                }],
+            );
+        }
+    }
+
     #[test]
     fn pwsh_with_noprofile_and_c_alias_is_stripped() {
         assert_parsed(
@@ -1277,7 +1397,29 @@ pub fn parse_command_impl(command: &[String]) -> Vec<ParsedCommand> {
         return commands;
     }
 
-    if let Some((_, script)) = extract_powershell_command(command) {
+    let powershell_command = command
+        .first()
+        .filter(|shell| shell.contains('\\'))
+        .map(|shell| {
+            let mut normalized = command.to_vec();
+            normalized[0] = shell.rsplit(['/', '\\']).next().unwrap_or(shell).to_owned();
+            normalized
+        });
+    if let Some((_, script)) =
+        extract_powershell_command(powershell_command.as_deref().unwrap_or(command))
+    {
+        let tokens = tokenize_powershell_command(script);
+        if tokens
+            .first()
+            .is_some_and(|executable| executable == "Get-Content")
+            && let [ParsedCommand::Read { name, path, .. }] = parse_command_impl(&tokens).as_slice()
+        {
+            return vec![ParsedCommand::Read {
+                cmd: script.to_string(),
+                name: name.clone(),
+                path: path.clone(),
+            }];
+        }
         return vec![ParsedCommand::Unknown {
             cmd: script.to_string(),
         }];
@@ -2253,8 +2395,32 @@ fn summarize_main_tokens(main_cmd: &[String]) -> ParsedCommand {
                 path,
             }
         }
-        Some((head, tail)) if head == "cat" => {
+        Some((head, tail)) if head == "cat" || head.eq_ignore_ascii_case("Get-Content") => {
-            if let Some(path) = single_non_flag_operand(tail, &[]) {
+            let path = if head == "cat" {
+                single_non_flag_operand(tail, &[])
+            } else {
+                // Intentionally miss complex reads: conservative presentation should not
+                // require implementing PowerShell's full expression and argument grammar.
+                if tail.iter().all(|argument| {
+                    !argument.starts_with('-')
+                        || ["-Raw", "-Path", "-LiteralPath"]
+                            .iter()
+                            .any(|flag| argument.eq_ignore_ascii_case(flag))
+                }) {
+                    single_non_flag_operand(tail, &[])
+                } else {
+                    None
+                }
+                .filter(|path| {
+                    !path.is_empty()
+                        && !path.starts_with('-')
+                        && path.chars().all(|character| {
+                            character.is_alphanumeric()
+                                || matches!(character, ' ' | '/' | '\\' | '.' | '-' | '_' | ':')
+                        })
+                })
+            };
+            if let Some(path) = path {
                 let name = short_display_path(&path);
                 ParsedCommand::Read {
                     cmd: shlex_join(main_cmd),

codex-rs/skills/src/invocation.rs

@@ -2,6 +2,7 @@ use std::path::Path;
 
 use codex_protocol::parse_command::ParsedCommand;
 use codex_shell_command::parse_command::parse_command_impl;
+use codex_shell_command::parse_command::tokenize_powershell_command;
 use codex_utils_absolute_path::AbsolutePathBuf;
 use codex_utils_path_uri::PathConvention;
 use codex_utils_path_uri::PathUri;
@@ -28,14 +29,17 @@ pub fn detect_implicit_skill_invocation_for_command(
     workdir: &AbsolutePathBuf,
 ) -> Option<SkillMetadata> {
     let workdir = canonicalize_if_exists(workdir);
-    let tokens = tokenize_command(command);
+    let tokens = if PathConvention::native() == PathConvention::Windows {
+        tokenize_powershell_command(command)
+    } else {
+        tokenize_command(command)
+    };
 
     if let Some(candidate) = detect_skill_script_run(outcome, tokens.as_slice(), &workdir) {
         return Some(candidate);
     }
 
     detect_skill_doc_read(outcome, tokens.as_slice(), &workdir)
-        .or_else(|| detect_powershell_skill_doc_read(outcome, command, &workdir))
 }
 
 /// Resolves statically recognizable skill accesses without consulting the host filesystem.
@@ -43,20 +47,8 @@ pub fn implicit_skill_accesses_for_command(
     command: &str,
     workdir: &PathUri,
 ) -> Vec<ImplicitSkillAccess> {
-    // Normalize Windows paths and recognize PowerShell reads using existing cat parsing.
     let tokens = if workdir.infer_path_convention() == Some(PathConvention::Windows) {
-        let mut tokens = tokenize_command(&command.replace('\\', "/"));
+        tokenize_powershell_command(command)
-
-        if let Some(executable) = tokens.first_mut()
-            && matches!(
-                executable.to_ascii_lowercase().as_str(),
-                "get-content" | "gc" | "type"
-            )
-        {
-            *executable = "cat".to_owned();
-        }
-
-        tokens
     } else {
         tokenize_command(command)
     };
@@ -151,44 +143,6 @@ fn detect_skill_doc_read(
     None
 }
 
-fn detect_powershell_skill_doc_read(
-    outcome: &impl ImplicitSkillLookup,
-    command: &str,
-    workdir: &AbsolutePathBuf,
-) -> Option<SkillMetadata> {
-    let path = powershell_get_content_path(command)?;
-    let candidate_path = canonicalize_if_exists(&workdir.join(Path::new(path)));
-    outcome
-        .implicit_skill_for_doc_path(&candidate_path)
-        .cloned()
-}
-
-fn powershell_get_content_path(command: &str) -> Option<&str> {
-    let mut arguments = command.trim().strip_prefix("Get-Content ")?;
-    if let Some(remaining_arguments) = arguments.strip_prefix("-Raw ") {
-        arguments = remaining_arguments;
-    }
-
-    let (path, trailing) = if let Some(quoted_path) = arguments.strip_prefix('"') {
-        let closing_quote = quoted_path.find('"')?;
-        (
-            &quoted_path[..closing_quote],
-            &quoted_path[closing_quote + 1..],
-        )
-    } else {
-        let path_end = arguments
-            .char_indices()
-            .find_map(|(index, character)| character.is_whitespace().then_some(index))
-            .unwrap_or(arguments.len());
-        (&arguments[..path_end], &arguments[path_end..])
-    };
-
-    if path.is_empty() || path.starts_with('-') || !trailing.trim().is_empty() {
-        return None;
-    }
-    Some(path)
-}
-
 fn command_basename(command: &str) -> String {
     Path::new(command)
         .file_name()

codex-rs/skills/src/invocation_tests.rs

@@ -85,6 +85,7 @@ fn powershell_skill_doc_read_matches_common_forms() {
         format!("Get-Content -Raw {path}"),
         format!("Get-Content \"{spaced_path}\""),
         format!("Get-Content -Raw \"{spaced_path}\""),
+        format!("get-content   -raw '{spaced_path}'"),
     ] {
         let found = detect_implicit_skill_invocation_for_command(
             &outcome,
@@ -101,11 +102,26 @@ fn powershell_skill_doc_read_matches_common_forms() {
 }
 
 #[test]
-fn powershell_get_content_path_preserves_windows_backslashes() {
+fn windows_executor_skill_reads_share_powershell_classification() {
+    let workdir = PathUri::parse("file:///C:/skills").expect("Windows workdir URI");
+    let document = PathUri::parse("file:///C:/skills/demo/SKILL.md").expect("skill URI");
+
+    for command in [
+        r"Get-Content C:\skills\demo\SKILL.md",
+        r"get-content -Raw C:\skills\demo\SKILL.md",
+        r"Get-Content -Path C:\skills\demo\SKILL.md",
+        r"Get-Content -LiteralPath C:\skills\demo\SKILL.md",
+        r"Get-Content C:\skills\demo\SKILL.md -Raw",
+        r"Get-Content -Raw -LiteralPath C:\skills\demo\SKILL.md",
+        r"gc C:\skills\demo\SKILL.md",
+        r"type C:\skills\demo\SKILL.md",
+    ] {
         assert_eq!(
-        powershell_get_content_path(r#"Get-Content C:\skills\example\SKILL.md"#),
+            implicit_skill_accesses_for_command(command, &workdir),
-        Some(r#"C:\skills\example\SKILL.md"#)
+            vec![ImplicitSkillAccess::Document(document.clone())],
+            "command: {command}"
         );
+    }
 }
 
 #[test]

codex-rs/tui/src/exec_cell/render.rs

@@ -964,6 +964,34 @@ mod tests {
         );
     }
 
+    #[test]
+    fn powershell_skill_read_snapshot() {
+        let command = vec![
+            "powershell.exe".to_string(),
+            "-Command".to_string(),
+            r"Get-Content C:\skills\demo\SKILL.md".to_string(),
+        ];
+        let parsed = codex_shell_command::parse_command::parse_command(&command);
+        let cell = new_active_exec_command(
+            "call-id".to_string(),
+            command,
+            parsed,
+            ExecCommandSource::Agent,
+            /*interaction_input*/ None,
+            /*animations_enabled*/ false,
+        );
+        let rendered = cell
+            .display_lines(/*width*/ 80)
+            .iter()
+            .map(render_line_text)
+            .join("\n");
+
+        insta::assert_snapshot!(rendered, @r"
+        • Exploring
+          └ Read SKILL.md
+        ");
+    }
+
     #[test]
     fn command_truncation_ellipsis_does_not_include_transcript_hint() {
         let truncated = ExecCell::limit_lines_from_start(