diff --git a/tk_comfyui_batch_image/examples/workflows/m1_basic_vertical_stack.json b/tk_comfyui_batch_image/examples/workflows/m1_basic_vertical_stack.json
new file mode 100644
index 0000000..9373bfb
--- /dev/null
+++ b/tk_comfyui_batch_image/examples/workflows/m1_basic_vertical_stack.json
@@ -0,0 +1,53 @@
+{
+  "last_node_id": 7,
+  "last_link_id": 8,
+  "nodes": [
+    { "id": 1, "type": "CheckpointLoaderSimple", "pos": [40, 100],
+      "inputs": [], "outputs": [{"name":"MODEL","type":"MODEL","links":[1]},
+                                 {"name":"CLIP","type":"CLIP","links":[2]},
+                                 {"name":"VAE","type":"VAE","links":[3]}],
+      "widgets_values": ["realistic_vision.safetensors"] },
+    { "id": 2, "type": "ComicScriptLoader", "pos": [40, 300],
+      "inputs": [],
+      "outputs": [{"name":"comic_script","type":"COMIC_SCRIPT","links":[4]},
+                  {"name":"summary","type":"STRING","links":null}],
+      "widgets_values": ["file", "comics/basic.json", "", ""] },
+    { "id": 3, "type": "ComicBatchGenerator", "pos": [400, 150],
+      "inputs": [
+        {"name":"comic_script","type":"COMIC_SCRIPT","link":4},
+        {"name":"model","type":"MODEL","link":1},
+        {"name":"clip","type":"CLIP","link":2},
+        {"name":"vae","type":"VAE","link":3}
+      ],
+      "outputs": [
+        {"name":"generated_panels","type":"IMAGE","links":[5]},
+        {"name":"comic_script","type":"COMIC_SCRIPT","links":[6]},
+        {"name":"generation_log","type":"STRING","links":null}
+      ],
+      "widgets_values": ["euler","normal",25,7.0,1.0,"retry_then_skip",2,"",""] },
+    { "id": 4, "type": "ComicPageComposer", "pos": [800, 150],
+      "inputs": [
+        {"name":"generated_panels","type":"IMAGE","link":5},
+        {"name":"comic_script","type":"COMIC_SCRIPT","link":6}
+      ],
+      "outputs": [
+        {"name":"composed_pages","type":"IMAGE","links":[7]},
+        {"name":"panel_bboxes_json","type":"STRING","links":null},
+        {"name":"individual_panels","type":"IMAGE","links":null}
+      ],
+      "widgets_values": [false] },
+    { "id": 5, "type": "SaveImage", "pos": [1200, 150],
+      "inputs": [{"name":"images","type":"IMAGE","link":7}],
+      "widgets_values": ["comic/page"] }
+  ],
+  "links": [
+    [1,1,0,3,1,"MODEL"],
+    [2,1,1,3,2,"CLIP"],
+    [3,1,2,3,3,"VAE"],
+    [4,2,0,3,0,"COMIC_SCRIPT"],
+    [5,3,0,4,0,"IMAGE"],
+    [6,3,1,4,1,"COMIC_SCRIPT"],
+    [7,4,0,5,0,"IMAGE"]
+  ],
+  "version": 0.4
+}
diff --git a/tk_comfyui_batch_image/tests/test_integration_e2e.py b/tk_comfyui_batch_image/tests/test_integration_e2e.py
new file mode 100644
index 0000000..37aef46
--- /dev/null
+++ b/tk_comfyui_batch_image/tests/test_integration_e2e.py
@@ -0,0 +1,66 @@
+"""End-to-end: loader → generator → composer with the basic.json fixture."""
+from pathlib import Path
+
+import numpy as np
+import torch
+
+from tk_comfyui_batch_image.core.sampler_runner import SamplerBackend
+from tk_comfyui_batch_image.nodes.batch_generator import ComicBatchGenerator
+from tk_comfyui_batch_image.nodes.page_composer import ComicPageComposer
+from tk_comfyui_batch_image.nodes.script_loader import ComicScriptLoader
+
+FIXTURES = Path(__file__).parent / "fixtures" / "scripts"
+
+
+class GreyBackend(SamplerBackend):
+    def encode(self, clip, text):
+        return ("c", text)
+
+    def empty_latent(self, w, h, batch_size=1):
+        return {"w": w, "h": h}
+
+    def sample(self, model, seed, steps, cfg, sampler_name, scheduler,
+               cond_pos, cond_neg, latent, denoise):
+        return latent
+
+    def vae_decode(self, vae, samples):
+        h, w = samples["h"], samples["w"]
+        return np.full((h, w, 3), 0.5, dtype=np.float32)
+
+
+def test_full_pipeline_basic_script(tmp_path: Path):
+    loader = ComicScriptLoader()
+    text = (FIXTURES / "basic.json").read_text(encoding="utf-8")
+    script, summary = loader.load(mode="inline", json_text=text,
+                                  json_file="", json_path="")
+
+    gen = ComicBatchGenerator()
+    panels, pass_script, log = gen.generate(
+        comic_script=script, model="M", clip="C", vae="V",
+        sampler_name="euler", scheduler="normal", steps=10, cfg=7.0, denoise=1.0,
+        on_failure="halt", retries=0,
+        positive_suffix="", negative_suffix="",
+        _backend=GreyBackend(), _out_dir=tmp_path,
+    )
+
+    composer = ComicPageComposer()
+    pages, bboxes_json, pass_panels = composer.compose(
+        generated_panels=panels, comic_script=pass_script, debug_overlay=False,
+    )
+
+    # 2 pages of same size
+    assert pages.shape[0] == 2
+    # all panels generated
+    assert panels.shape[0] == 4
+    # rerun without changes → everything cached
+    gen2 = ComicBatchGenerator()
+    panels2, _, log2 = gen2.generate(
+        comic_script=script, model="M", clip="C", vae="V",
+        sampler_name="euler", scheduler="normal", steps=10, cfg=7.0, denoise=1.0,
+        on_failure="halt", retries=0,
+        positive_suffix="", negative_suffix="",
+        _backend=GreyBackend(), _out_dir=tmp_path,
+    )
+    assert "cached" in log2
+    # PNG round-trip introduces ≤1/255 quantisation; use atol accordingly
+    assert torch.allclose(panels, panels2, atol=1.0 / 255)