pi subagents and workflow skill plus HA

pi/.pi/agent/prompts/plan.md

@@ -0,0 +1,15 @@
+---
+description: "Scout + plan + Opus plan review — no implementation"
+---
+
+Use the subagent tool with a chain to plan (but NOT implement) the following:
+
+```
+{ chain: [
+  { agent: "scout", task: "Find all code relevant to: $@" },
+  { agent: "planner", task: "Create a detailed implementation plan for: $@\n\nContext from scout:\n\n{previous}" },
+  { agent: "plan-reviewer", task: "Review this implementation plan. Verify file paths and line numbers against the actual codebase.\n\n{previous}" }
+]}
+```
+
+Present the plan and the review to me. Do NOT proceed to implementation.