fix: use line-anchored scan for skills frontmatter delimiter

Replace raw split('---', 2) with line-anchored scan for the closing
delimiter to prevent embedded --- values in descriptions from
truncating metadata or spilling into the skill body.

Author: Quratulain-bilal

src/specify_cli/integrations/base.py

@@ -1630,10 +1630,18 @@ def setup(
             # Parse frontmatter for description
             frontmatter: dict[str, Any] = {}
             if raw.startswith("---"):
-                parts = raw.split("---", 2)
-                if len(parts) >= 3:
+                fm_lines = raw.split("\n")
+                fm_close = next(
+                    (
+                        i
+                        for i in range(1, len(fm_lines))
+                        if fm_lines[i].rstrip() == "---"
+                    ),
+                    None,
+                )
+                if fm_close is not None:
                     try:
-                        fm = yaml.safe_load(parts[1])
+                        fm = yaml.safe_load("\n".join(fm_lines[1:fm_close]))
                         if isinstance(fm, dict):
                             frontmatter = fm
                     except yaml.YAMLError:
@@ -1650,9 +1658,17 @@ def setup(
             # output byte-for-byte (the template body starts with \n after
             # the closing ---).
             if processed_body.startswith("---"):
-                parts = processed_body.split("---", 2)
-                if len(parts) >= 3:
-                    processed_body = parts[2]
+                body_lines = processed_body.split("\n")
+                body_close = next(
+                    (
+                        i
+                        for i in range(1, len(body_lines))
+                        if body_lines[i].rstrip() == "---"
+                    ),
+                    None,
+                )
+                if body_close is not None:
+                    processed_body = "\n".join(body_lines[body_close + 1 :])
 
             # Select description — use the original template description
             # to stay byte-for-byte identical with release ZIP output.