Ensure scrape output ends with newline

Normalize non-empty scrape output before it is written to stdout or an --output file, so generated text content behaves like a regular POSIX text stream.

Constraint: Preserve empty output as empty and avoid duplicating an existing trailing newline.

Rejected: Per-path stdout/file special cases because a single normalization point covers both sinks.

Confidence: High.

Scope-risk: Low; affects only scrape command output formatting plus test imports.

Directive: PlatformNetwork/bounty-challenge#53315.

Tested: cargo test -p cortex-cli.

Tested: Local smoke verified stdout and --output bytes end in 0a.

Not-tested: Full workspace test suite.

Author: BoSuY0

src/cortex-cli/src/agent_cmd/tests.rs

@@ -3,10 +3,9 @@
 #[cfg(test)]
 mod tests {
     use crate::agent_cmd::cli::{CopyArgs, ExportArgs};
-    use crate::agent_cmd::loader::{
-        load_builtin_agents, parse_frontmatter, read_file_with_encoding,
-    };
+    use crate::agent_cmd::loader::{load_builtin_agents, parse_frontmatter};
     use crate::agent_cmd::types::AgentMode;
+    use crate::utils::file::read_file_with_encoding;
 
     #[test]
     fn test_read_file_with_utf8() {

src/cortex-cli/src/scrape_cmd/command.rs

@@ -306,6 +306,7 @@ impl ScrapeCommand {
             // Parse and convert HTML
             self.process_html(&body, format)?
         };
+        let output = ensure_trailing_newline(output);
 
         // Write output
         match &self.output {
@@ -373,3 +374,10 @@ impl ScrapeCommand {
         Ok(output)
     }
 }
+
+pub(super) fn ensure_trailing_newline(mut output: String) -> String {
+    if !output.is_empty() && !output.ends_with('\n') {
+        output.push('\n');
+    }
+    output
+}

src/cortex-cli/src/scrape_cmd/tests.rs

@@ -6,7 +6,7 @@ mod tests {
 
     use cortex_engine::create_client_builder;
 
-    use crate::scrape_cmd::command::ScrapeCommand;
+    use crate::scrape_cmd::command::{ScrapeCommand, ensure_trailing_newline};
     use crate::scrape_cmd::html::{html_to_markdown, html_to_text, normalize_whitespace};
     use crate::scrape_cmd::http::parse_headers;
     use crate::scrape_cmd::types::OutputFormat;
@@ -145,6 +145,19 @@ mod tests {
         assert!("invalid".parse::<OutputFormat>().is_err());
     }
 
+    #[test]
+    fn test_ensure_trailing_newline() {
+        assert_eq!(
+            ensure_trailing_newline("scraped content".to_string()),
+            "scraped content\n"
+        );
+        assert_eq!(
+            ensure_trailing_newline("already terminated\n".to_string()),
+            "already terminated\n"
+        );
+        assert_eq!(ensure_trailing_newline(String::new()), "");
+    }
+
     #[test]
     fn test_normalize_whitespace() {
         // normalize_whitespace collapses multiple whitespace into single space