fix(convert): quote YAML frontmatter values (#778)

Signed-off-by: Mr-Neutr0n <harikp2002@gmail.com>

scripts/convert.sh

@@ -106,6 +106,13 @@ toml_escape_string() {
   '
 }
 
+# Quote a single-line value for a YAML frontmatter scalar. Single-quoted YAML
+# strings keep colons, hashes, backslashes, and Unicode literal, while doubling
+# an apostrophe is the only escaping rule required here.
+yaml_quote() {
+  printf "'%s'" "$(printf '%s' "$1" | sed "s/'/''/g")"
+}
+
 # --- Per-tool converters ---
 
 convert_antigravity() {
@@ -127,8 +134,8 @@ convert_antigravity() {
   # valid Agent-Skills skill for any host (and deterministic — no date stamp).
   cat > "$outfile" <<HEREDOC
 ---
-name: ${slug}
-description: ${description}
+name: $(yaml_quote "$slug")
+description: $(yaml_quote "$description")
 ---
 ${body}
 HEREDOC
@@ -154,8 +161,8 @@ convert_osaurus() {
   # Kept to the standard fields so it stays compatible with any Agent-Skills host.
   cat > "$outfile" <<HEREDOC
 ---
-name: ${slug}
-description: ${description}
+name: $(yaml_quote "$slug")
+description: $(yaml_quote "$description")
 ---
 ${body}
 HEREDOC
@@ -199,8 +206,8 @@ convert_gemini_cli() {
 
   cat > "$outfile" <<HEREDOC
 ---
-name: ${slug}
-description: ${description}
+name: $(yaml_quote "$slug")
+description: $(yaml_quote "$description")
 ---
 ${body}
 HEREDOC
@@ -267,8 +274,8 @@ convert_opencode() {
   # Named colors are resolved to hex via resolve_opencode_color().
   cat > "$outfile" <<HEREDOC
 ---
-name: ${name}
-description: ${description}
+name: $(yaml_quote "$name")
+description: $(yaml_quote "$description")
 mode: subagent
 color: '${color}'
 ---
@@ -291,7 +298,7 @@ convert_cursor() {
   # Cursor .mdc format: description + globs + alwaysApply frontmatter
   cat > "$outfile" <<HEREDOC
 ---
-description: ${description}
+description: $(yaml_quote "$description")
 globs: ""
 alwaysApply: false
 ---
@@ -409,17 +416,17 @@ convert_qwen() {
   if [[ -n "$tools" ]]; then
     cat > "$outfile" <<HEREDOC
 ---
-name: ${slug}
-description: ${description}
-tools: ${tools}
+name: $(yaml_quote "$slug")
+description: $(yaml_quote "$description")
+tools: $(yaml_quote "$tools")
 ---
 ${body}
 HEREDOC
   else
     cat > "$outfile" <<HEREDOC
 ---
-name: ${slug}
-description: ${description}
+name: $(yaml_quote "$slug")
+description: $(yaml_quote "$description")
 ---
 ${body}
 HEREDOC
@@ -446,17 +453,17 @@ convert_zcode() {
   if [[ -n "$tools" ]]; then
     cat > "$outfile" <<HEREDOC
 ---
-name: ${slug}
-description: ${description}
-tools: ${tools}
+name: $(yaml_quote "$slug")
+description: $(yaml_quote "$description")
+tools: $(yaml_quote "$tools")
 ---
 ${body}
 HEREDOC
   else
     cat > "$outfile" <<HEREDOC
 ---
-name: ${slug}
-description: ${description}
+name: $(yaml_quote "$slug")
+description: $(yaml_quote "$description")
 ---
 ${body}
 HEREDOC