sync local pi changes

.pi/agent/extensions/tmux-subagent/prompts/implement.md

@@ -0,0 +1,10 @@
+---
+description: Scout, plan, and implement using tmux-backed subagents
+---
+Use the `subagent` tool to handle this request in three stages:
+
+1. Run `scout` to inspect the codebase for: $@
+2. Run `planner` in chain mode, using `{previous}` from the scout output to produce a concrete implementation plan
+3. Run `worker` in chain mode, using `{previous}` from the planner output to implement the approved plan
+
+User request: $@