Add MVP footstep audio placeholders

Scripts/verify_footstep_placeholders.py

@@ -0,0 +1,59 @@
+#!/usr/bin/env python3
+"""Verify MVP footstep placeholder hooks are present."""
+
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+CHAR_H = ROOT / "Source" / "AgrarianGame" / "AgrarianGameCharacter.h"
+CHAR_CPP = ROOT / "Source" / "AgrarianGame" / "AgrarianGameCharacter.cpp"
+TDD = ROOT / "Docs" / "TechnicalDesignDocument.md"
+ROADMAP = ROOT / "AGRARIAN_DEVELOPMENT_ROADMAP.md"
+
+REQUIRED = {
+    CHAR_H: [
+        "UAudioComponent* FootstepAudioComponent;",
+        "TObjectPtr<USoundBase> WalkFootstepSound;",
+        "TObjectPtr<USoundBase> SprintFootstepSound;",
+        "TObjectPtr<USoundBase> CrouchFootstepSound;",
+        "TObjectPtr<USoundBase> ProneFootstepSound;",
+        "WalkFootstepIntervalSeconds",
+        "SprintFootstepIntervalSeconds",
+        "CrouchFootstepIntervalSeconds",
+        "ProneFootstepIntervalSeconds",
+        "void UpdateFootstepAudio(float DeltaSeconds);",
+    ],
+    CHAR_CPP: [
+        "#include \"Components/AudioComponent.h\"",
+        "FootstepAudioComponent = CreateDefaultSubobject<UAudioComponent>",
+        "FootstepAudioComponent->bAllowSpatialization = true",
+        "UpdateFootstepAudio(DeltaSeconds);",
+        "GetCurrentFootstepSound()",
+        "GetCurrentFootstepIntervalSeconds()",
+        "GetCharacterMovement()->IsFalling()",
+    ],
+    TDD: [
+        "native footstep placeholders",
+        "`FootstepAudioComponent`",
+        "walk, sprint, crouch, and prone sound",
+    ],
+    ROADMAP: [
+        "[x] Add footstep placeholders.",
+    ],
+}
+
+
+def main() -> None:
+    missing = []
+    for path, snippets in REQUIRED.items():
+        text = path.read_text(encoding="utf-8")
+        for snippet in snippets:
+            if snippet not in text:
+                missing.append(f"{path.relative_to(ROOT)} missing {snippet!r}")
+    if missing:
+        raise SystemExit("FAILED: " + "; ".join(missing))
+    print("OK: footstep placeholder hooks are implemented.")
+
+
+if __name__ == "__main__":
+    main()