diff --git a/api-v3/test/unit/f3-1-chronological-merge.test.ts b/api-v3/test/unit/f3-1-chronological-merge.test.ts
new file mode 100644
index 0000000..8f9b96c
--- /dev/null
+++ b/api-v3/test/unit/f3-1-chronological-merge.test.ts
@@ -0,0 +1,54 @@
+import 'reflect-metadata';
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { readFileSync } from 'node:fs';
+
+const migration = readFileSync(
+  'src/database/migrations/1789844600000-phase-f3-1-asset-chronological-merge.ts',
+  'utf8',
+);
+const service = readFileSync('src/asset-master/inventory-merge.service.ts', 'utf8');
+const controller = readFileSync('src/asset-master/inventory-merge.controller.ts', 'utf8');
+
+test('F3.1 registra cada fusión como evento append-only con snapshots', () => {
+  assert.match(migration, /CREATE TABLE asset_merges/);
+  assert.match(migration, /source_snapshot jsonb NOT NULL/);
+  assert.match(migration, /canonical_snapshot jsonb NOT NULL/);
+  assert.match(migration, /UNIQUE \(source_asset_id\)/);
+  assert.match(migration, /BEFORE UPDATE OR DELETE ON asset_merges/);
+  assert.match(migration, /append-only/);
+});
+
+test('F3.1 sólo permite fusionar Instalaciones o Subinstalaciones compatibles', () => {
+  assert.match(service, /MERGEABLE_TYPES = new Set\(\['instalacion', 'subinstalacion'\]\)/);
+  assert.match(service, /INVENTORY_MERGE_TYPE_INVALID/);
+  assert.match(service, /INVENTORY_MERGE_CONTEXT_MISMATCH/);
+  assert.match(service, /INVENTORY_MERGE_PARENT_MISMATCH/);
+  assert.match(service, /INVENTORY_MERGE_CHILD_FAMILY_CONFLICT/);
+});
+
+test('F3.1 preserva referencias históricas y sólo reubica hijos actuales', () => {
+  assert.match(service, /historyPolicy: 'HISTORICAL_REFERENCES_PRESERVED'/);
+  assert.match(service, /historicalReferencesRewritten: false/);
+  assert.doesNotMatch(service, /UPDATE\s+inspection_findings/i);
+  assert.doesNotMatch(service, /UPDATE\s+inspection_act_assets/i);
+  assert.doesNotMatch(service, /UPDATE\s+inspection_visit_assets/i);
+  assert.match(service, /Reparentado por fusión cronológica/);
+  assert.match(service, /AssetVersionChangeType\.UPDATED/);
+});
+
+test('F3.1 expone estado/merge en WEB y conciliación de alta nacida en la inspección para APK', () => {
+  assert.match(controller, /:id\/merge-status/);
+  assert.match(controller, /:id\/merge/);
+  assert.match(controller, /:assetId\/merge/);
+  assert.match(controller, /assets\.create/);
+  assert.match(controller, /inspections\.execute/);
+  assert.match(service, /FIELD_MERGE_SOURCE_MUST_BE_DISCOVERY/);
+  assert.match(service, /assertMobileInspector\(principal\)/);
+});
+
+test('F3.1 resuelve cadenas de merge hacia un canónico final y detecta ciclos', () => {
+  assert.match(service, /WITH RECURSIVE chain/);
+  assert.match(service, /INVENTORY_MERGE_CYCLE/);
+  assert.match(service, /aliasesFor/);
+});