diff --git a/comfyui-mcp/Dockerfile b/comfyui-mcp/Dockerfile
index e035259..e290cea 100644
--- a/comfyui-mcp/Dockerfile
+++ b/comfyui-mcp/Dockerfile
@@ -32,9 +32,12 @@ if "_bi.print" not in t:
     s.write_text(t)
 PY
 
-# Ordo AI Stack: remove upstream bundled workflows — agents compose their own via queue_prompt.
-# The upstream generate_image.json hardcodes v1-5-pruned-emaonly.ckpt which doesn't exist.
-RUN rm -f workflows/generate_image.json workflows/basic_api_test.json
+# Ordo AI Stack: remove ALL upstream bundled workflows — nothing is baked here. Skills/agents
+# compose their own graph and submit it via queue_prompt(workflow_json=...). In particular the
+# song workflow lives in Hermes' private data
+# (data/hermes/skills/creative/song-generation/generate_song.workflow.json) so it can be edited
+# without an image rebuild. (generate_image.json also hardcoded a nonexistent checkpoint.)
+RUN rm -f workflows/generate_image.json workflows/basic_api_test.json workflows/generate_song.json
 
 # Ordo AI Stack: accept flat run_workflow args + optional default workflow_id (see tools/workflow.py)
 COPY tools/workflow.py tools/workflow.py
diff --git a/docker-compose.yml b/docker-compose.yml
index fcb7d31..7367f50 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -496,6 +496,10 @@ services:
 
   comfyui:
     image: ${COMFYUI_IMAGE:-yanwk/comfyui-boot:cpu}
+    # NOTE: this image supplies only the Python/CUDA runtime. The ComfyUI application code is
+    # the git checkout bind-mounted from data/comfyui-storage/ComfyUI (see volumes below).
+    # It must be >= v0.19.0 for ACE-Step 1.5 XL support (local song generation via generate_song);
+    # roll back with `git -C data/comfyui-storage/ComfyUI checkout <ref>` if a version breaks a node.
     # No fixed container_name — avoids "name already in use" when another project
     # owns `comfyui`; Docker DNS still resolves the service name `comfyui` on this network.
     restart: unless-stopped