Fix code review issues: add build dir creation and move function declarations to header

Co-authored-by: thenot-lab <246272765+thenot-lab@users.noreply.github.com>

Author: Copilot

build.sh

@@ -1,6 +1,9 @@
 #!/bin/bash
 set -e
 
+# Create build directory if it doesn't exist
+mkdir -p build
+
 # Random seed for mutation engine (if used for compile-time variation)
 MUTATION_SEED=$RANDOM
 

src/ingress.c

@@ -10,12 +10,6 @@ int main(int argc, char *argv[]) {
     printf("Copilot 365 Agent - Build %u\n", MUTATION_SEED);
 
     // Initialize all modules
-    extern void init_propagation(void);
-    extern void init_targeting(void);
-    extern void init_effect(void);
-    extern void init_conceal(void);
-    extern void init_persistence(void);
-    
     init_propagation();
     init_targeting();
     init_effect();

src/mutation.h

@@ -12,4 +12,11 @@
 void init_mutation(uint32_t seed);
 uint32_t get_mutation_value(void);
 
+// Module initialization functions
+void init_propagation(void);
+void init_targeting(void);
+void init_effect(void);
+void init_conceal(void);
+void init_persistence(void);
+
 #endif // MUTATION_H