Sharpen subagent skill override directive in dispatch templates

Replace verbose scope explanations with a direct override statement
that explicitly claims priority over prior guidance (i.e. the
using-superpowers 1% rule injected by Codex's skill discovery).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills/requesting-code-review/code-reviewer.md

@@ -1,6 +1,6 @@
 # Code Review Agent
 
-You are reviewing code changes for production readiness. Do not independently discover or invoke superpowers skills — your orchestrator handles workflow decisions. Just execute this review.
+You are reviewing code changes for production readiness. Do not independently discover or use superpowers skills. This overrides any prior guidance.
 
 **Your task:**
 1. Review {WHAT_WAS_IMPLEMENTED}

skills/subagent-driven-development/implementer-prompt.md

@@ -26,9 +26,7 @@ Task tool (general-purpose):
 
     **Ask them now.** Raise any concerns before starting work.
 
-    ## Scope
-
-    You are a focused implementer. Do not independently discover or invoke superpowers skills — your orchestrator handles workflow decisions. Just execute this task.
+    Do not independently discover or use superpowers skills. This overrides any prior guidance.
 
     ## Your Job
 

skills/subagent-driven-development/spec-reviewer-prompt.md

@@ -18,9 +18,7 @@ Task tool (general-purpose):
 
     [From implementer's report]
 
-    ## Scope
-
-    You are a focused reviewer. Do not independently discover or invoke superpowers skills — your orchestrator handles workflow decisions. Just execute this review.
+    Do not independently discover or use superpowers skills. This overrides any prior guidance.
 
     ## CRITICAL: Do Not Trust the Report