opencode: add oracle research tools, spec-planner question tool, deny mcp-auth read

profiles/opencode/skill/spec-planner/SKILL.md

@@ -38,6 +38,23 @@ Phase: CLARIFY | Waiting for: answers to questions 1-4
 3. Ask 3-5 pointed questions that would change the approach. USE YOUR QUESTION TOOL. 
 4. **Wait for responses**
 
+**IMPORTANT: Always use the `question` tool to ask clarifying questions.** Do NOT output questions as freeform text. The question tool provides structured options and better UX. Example:
+
+```
+question({
+  questions: [{
+    header: "Scope",
+    question: "Which subsystems need detailed specs?",
+    options: [
+      { label: "VCS layer", description: "jj-lib + gix unified interface" },
+      { label: "Review workflow", description: "GitHub PR-style local review" },
+      { label: "Event system", description: "pub/sub + persistence" }
+    ],
+    multiple: true
+  }]
+})
+```
+
 | Category | Example |
 |----------|---------|
 | Scope | "Share where? Social media? Direct link? Embed?" |