fix(junie): force allowPromptArgument: true in frontmatter when $prompt is used

AI-assisted (Claude Code).

Author: chelsealong

src/specify_cli/integrations/junie/__init__.py

@@ -144,13 +144,15 @@ def _adapt_argument_placeholders(content: str) -> str:
         """
         content = content.replace(" or `$speckit-...`", "")
         content = content.replace("$ARGUMENTS", "$prompt")
-        if "$prompt" in content and "allowPromptArgument:" not in content:
-            content = re.sub(
-                r"\A---(\r?\n)",
-                lambda m: f"---{m.group(1)}allowPromptArgument: true{m.group(1)}",
-                content,
-                count=1,
+        fm = re.match(r"\A---(\r?\n)(.*?)(\r?\n)---(?=\r?\n|\Z)", content, re.S)
+        if "$prompt" in content and fm:
+            nl, block = fm.group(1), fm.group(2)
+            block, n = re.subn(
+                r"(?m)^allowPromptArgument:[^\r\n]*", "allowPromptArgument: true", block
             )
+            if not n:
+                block = f"allowPromptArgument: true{nl}{block}"
+            content = f"---{nl}{block}{content[fm.end(2):]}"
         return content
 
     def post_process_command_content(self, content: str) -> str:

tests/integrations/test_integration_junie.py

@@ -122,6 +122,15 @@ def test_junie_argument_placeholders_adapted(self):
         assert "$ARGUMENTS" not in out
         assert "$speckit" not in out
 
+    def test_junie_allow_prompt_argument_false_is_enabled(self):
+        junie = get_integration("junie")
+        content = "---\nallowPromptArgument: false\n---\n$ARGUMENTS\n"
+        out = junie.post_process_command_content(content)
+        assert out == "---\nallowPromptArgument: true\n---\n$prompt\n"
+        body = "---\ndescription: x\n---\nallowPromptArgument: no\n$ARGUMENTS\n"
+        out = junie.post_process_command_content(body)
+        assert out.startswith("---\nallowPromptArgument: true\ndescription: x\n---\n")
+
     def test_junie_setup_leaves_no_stray_dollar_arguments(self, tmp_path):
         """Installed commands only reference Junie's own ``$prompt`` token."""
         import re