fix(hooks): match superpowers pattern exactly

- Add matcher: startup|clear|compact to SessionStart hook
- Inject only engineering-principles as foundational skill (19KB)
- Strip emoji, use plain text everywhere
- Remove 55KB of verbosity, keep focused primer

hooks/scripts/detect-file-type.sh

@@ -10,24 +10,24 @@ EXT="${FILE_PATH##*.}"
 
 case "$EXT" in
   ts|tsx)
-    echo "📐 [hub-guide] TypeScript file — apply typescript skill rules (strict types, no-any, proper generics)"
+    echo "[hub-guide] TypeScript file — apply typescript skill rules (strict types, no-any, proper generics)"
     ;;
   py)
-    echo "📐 [hub-guide] Python file — apply python skill rules (type hints, PEP 8, no wildcard imports)"
+    echo "[hub-guide] Python file — apply python skill rules (type hints, PEP 8, no wildcard imports)"
     ;;
   rs)
-    echo "📐 [hub-guide] Rust file — apply rust skill rules (ownership, error handling, clippy clean)"
+    echo "[hub-guide] Rust file — apply rust skill rules (ownership, error handling, clippy clean)"
     ;;
   go)
-    echo "📐 [hub-guide] Go file — apply go skill rules (idiomatic Go, interfaces, error handling)"
+    echo "[hub-guide] Go file — apply go skill rules (idiomatic Go, interfaces, error handling)"
     ;;
   js|jsx)
-    echo "📐 [hub-guide] JavaScript file — apply typescript skill rules (ESM, modern JS)"
+    echo "[hub-guide] JavaScript file — apply typescript skill rules (ESM, modern JS)"
     ;;
   dockerfile|Dockerfile)
-    echo "📐 [hub-guide] Dockerfile — apply docker skill rules (multi-stage, minimal layers, no root)"
+    echo "[hub-guide] Dockerfile — apply docker skill rules (multi-stage, minimal layers, no root)"
     ;;
   yml|yaml)
-    echo "📐 [hub-guide] YAML file — check ci-cd and docker skill rules"
+    echo "[hub-guide] YAML file — check ci-cd and docker skill rules"
     ;;
 esac