diff --git a/src/cross.ts b/src/cross.ts
new file mode 100644
index 0000000..9185b34
--- /dev/null
+++ b/src/cross.ts
@@ -0,0 +1,35 @@
+export interface NumericVersion {
+  readonly major: number;
+  readonly minor: number;
+  readonly patch: number;
+}
+
+export function parseNumericVersion(value: string): NumericVersion | null {
+  const match = /^(\d+)\.(\d+)\.(\d+)(?:[-+].*)?$/.exec(value.trim());
+
+  if (!match) return null;
+
+  const major = Number(match[1]);
+  const minor = Number(match[2]);
+  const patch = Number(match[3]);
+
+  if (![major, minor, patch].every(Number.isSafeInteger)) return null;
+
+  return { major, minor, patch };
+}
+
+export function compareVersions(
+  left: NumericVersion,
+  right: NumericVersion,
+): number {
+  if (left.major !== right.major) return left.major - right.major;
+  if (left.minor !== right.minor) return left.minor - right.minor;
+  return left.patch - right.patch;
+}
+
+export function isAtLeast(
+  actual: NumericVersion,
+  minimum: NumericVersion,
+): boolean {
+  return compareVersions(actual, minimum) >= 0;
+}
diff --git a/src/validate.ts b/src/validate.ts
new file mode 100644
index 0000000..693f6c9
--- /dev/null
+++ b/src/validate.ts
@@ -0,0 +1,24 @@
+import type {
+  ProjectGenerationResult,
+  ProjectGeneratorInput,
+  ProjectGeneratorServices,
+} from './types.js';
+
+export function orchestrateProjectGeneration(
+  input: ProjectGeneratorInput,
+  services: ProjectGeneratorServices,
+): ProjectGenerationResult {
+  const validated = services.validate(input);
+  const destination = services.planDestination(validated);
+  const template = services.selectTemplate(validated, destination);
+  const result = services.generate({
+    input: validated,
+    destination,
+    template,
+  });
+
+  services.install?.(result);
+  services.initializeGit?.(result);
+
+  return result;
+}