fix(ClaudeAdapter): strip surrounding quotes from scalar frontmatter values

ClaudeAdapter.parseFrontmatter stripped quotes only from array items, never
from scalar values, so a quoted scalar like `name: "SubAgent"` parsed to the
literal `"SubAgent"` (embedded quotes). The adapter's own
generateClaudeAgentMarkdown emits every scalar quoted, so a subagent
fromOAC -> toOAC round-trip mangled name/description/model. The sibling
CursorAdapter.parseFrontmatter already does value.replace(/^["']|["']$/g, ""),
proving the intended behavior. Apply the same scalar quote-strip. Add a
regression test.

Author: Osamaali313

packages/compatibility-layer/src/adapters/ClaudeAdapter.ts

@@ -276,6 +276,11 @@ export class ClaudeAdapter extends BaseAdapter {
             .slice(1, -1)
             .split(",")
             .map((v) => v.trim().replace(/"/g, ""));
+        } else if (typeof value === "string") {
+          // Strip surrounding quotes from scalar values (matches
+          // CursorAdapter.parseFrontmatter, and undoes the quoting that
+          // generateClaudeAgentMarkdown adds, e.g. name: "...").
+          value = value.replace(/^["']|["']$/g, "");
         }
 
         frontmatter[key] = value;

packages/compatibility-layer/tests/unit/adapters/ClaudeAdapter.test.ts

@@ -235,6 +235,24 @@ This is the system prompt for the agent.`;
       expect(result.systemPrompt).toBe("This is the system prompt for the agent.");
     });
 
+    it("strips surrounding quotes from scalar frontmatter values", async () => {
+      // generateClaudeAgentMarkdown emits quoted scalars (name: "..."), so a
+      // fromOAC -> toOAC round-trip must not leave the embedded quotes.
+      const source = `---
+name: "SubAgent"
+description: "A subagent"
+model: "claude-opus-4"
+---
+
+Prompt body`;
+
+      const result = await adapter.toOAC(source);
+
+      expect(result.frontmatter.name).toBe("SubAgent");
+      expect(result.frontmatter.description).toBe("A subagent");
+      expect(result.frontmatter.model).toBe("claude-opus-4");
+    });
+
     it("parses agent.md with model in frontmatter", async () => {
       const source = `---
 name: Agent