TaskManager refactor

.specify/scripts/bash/check-prerequisites.sh

@@ -115,13 +115,15 @@ fi
 
 # Check for task files if required
 if $REQUIRE_TASKS; then
-    if [[ ! -f "$TASKS_ARCH" ]]; then
-        echo "ERROR: tasks-arch.md not found in $FEATURE_DIR" >&2
-        echo "Run /speckit.tasks first to create the task lists." >&2
-        exit 1
-    fi
-    if [[ ! -f "$TASKS_DEV" ]]; then
-        echo "ERROR: tasks-dev.md not found in $FEATURE_DIR" >&2
+    # Check for split tasks first
+    if [[ -f "$TASKS_ARCH" ]] && [[ -f "$TASKS_DEV" ]]; then
+        : # Split tasks exist, proceed
+    # Fallback to unified tasks.md
+    elif [[ -f "$TASKS" ]]; then
+        : # Unified tasks exist, proceed
+    else
+        echo "ERROR: No valid task files found in $FEATURE_DIR" >&2
+        echo "Expected 'tasks-arch.md' AND 'tasks-dev.md' (split) OR 'tasks.md' (unified)" >&2
         echo "Run /speckit.tasks first to create the task lists." >&2
         exit 1
     fi
@@ -143,8 +145,12 @@ fi
 
 # Include task files if requested and they exist
 if $INCLUDE_TASKS; then
-    [[ -f "$TASKS_ARCH" ]] && docs+=("tasks-arch.md")
-    [[ -f "$TASKS_DEV" ]] && docs+=("tasks-dev.md")
+    if [[ -f "$TASKS_ARCH" ]] || [[ -f "$TASKS_DEV" ]]; then
+        [[ -f "$TASKS_ARCH" ]] && docs+=("tasks-arch.md")
+        [[ -f "$TASKS_DEV" ]] && docs+=("tasks-dev.md")
+    elif [[ -f "$TASKS" ]]; then
+        docs+=("tasks.md")
+    fi
 fi
 
 # Output results
@@ -170,7 +176,11 @@ else
     check_file "$QUICKSTART" "quickstart.md"
     
     if $INCLUDE_TASKS; then
-        check_file "$TASKS_ARCH" "tasks-arch.md"
-        check_file "$TASKS_DEV" "tasks-dev.md"
+        if [[ -f "$TASKS_ARCH" ]] || [[ -f "$TASKS_DEV" ]]; then
+            check_file "$TASKS_ARCH" "tasks-arch.md"
+            check_file "$TASKS_DEV" "tasks-dev.md"
+        else
+            check_file "$TASKS" "tasks.md"
+        fi
     fi
 fi