Default workflows to SDXL CyberRealistic; ship empty model preseed

Drops the SD 1.5 placeholder. The shipped txt2img/img2img workflows now
reference CyberRealisticXLPlay_V8.0_FP16.safetensors (the checkpoint
figment used in production), and comfyui-init-models.sh ships with no
active fetches — operators uncomment examples or add their own URLs.

The script + workflow filenames have to line up; README explains.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

deployments/ai-stack/README.md

@@ -63,9 +63,11 @@ Then edit:
   Check sizes at <https://ollama.com/library> first; the host needs disk
   for everything listed.
 - **`comfyui-init-models.sh`** — checkpoints/VAEs/LoRAs to preseed into
-  ComfyUI. Default ships SD 1.5 only (matches the workflow placeholder).
-  Uncomment the SDXL/Flux/upscaler examples or add your own. Set `HF_TOKEN`
-  in `.env` if any are gated repos.
+  ComfyUI. Ships empty (no active fetches) — uncomment the SDXL/Flux/
+  upscaler examples or add your own. Whatever filename you pick should
+  match the `ckpt_name` field in `workflows/*.json` (default expects
+  `CyberRealisticXLPlay_V8.0_FP16.safetensors`). Set `HF_TOKEN` in
+  `.env` if any are gated repos.
 
 ## 3. Bring it up
 
@@ -91,10 +93,13 @@ ComfyUI ships no models. Three ways to get one in:
 
 1. **Preseed via the sidecar (default).** `comfyui-model-init` runs once
    on `compose up`, downloads everything `comfyui-init-models.sh` lists,
-   and exits. The default list pulls SD 1.5 to match the workflow
-   placeholder. Edit the script to add SDXL, Flux, LoRAs, upscalers, etc.
-   Re-run with `docker compose up -d comfyui-model-init` after edits;
-   already-present files are skipped.
+   and exits. The script ships empty — uncomment one of the examples or
+   add your own `fetch` calls (SDXL, Flux, LoRAs, upscalers, etc.). At
+   least one checkpoint should be named
+   `CyberRealisticXLPlay_V8.0_FP16.safetensors` to match the workflow
+   default, or update `ckpt_name` in `workflows/*.json` to whatever you
+   pull. Re-run with `docker compose up -d comfyui-model-init` after
+   script edits; already-present files are skipped.
 2. **ComfyUI-Manager UI.** Open `https://comfyui.example.com` (after
    basic-auth login), click **Manager**, then **Model Manager**, install
    from the catalogue.
@@ -126,7 +131,7 @@ In Open WebUI: **Admin Panel -> Settings -> Images**.
 4. **ComfyUI Workflow Nodes** -> paste the contents of
    [`../../workflows/txt2img.nodes.json`](../../workflows/txt2img.nodes.json).
 5. **Default Model** -> the filename of the checkpoint you dropped in
-   step 4 (e.g. `v1-5-pruned-emaonly.safetensors`).
+   step 4 (e.g. `CyberRealisticXLPlay_V8.0_FP16.safetensors`).
 6. Save.
 
 For image editing (img2img), scroll to the **Image Editing** section in

deployments/ai-stack/comfyui-init-models.sh

@@ -39,10 +39,13 @@ fetch() {
 
 # ─── Edit the list below to choose what gets preseeded ──────────────────────
 # Format: fetch <subdir under /models> <filename to save as> <direct URL>
-
-# SD 1.5 base — matches the placeholder filename in workflows/*.json
-fetch checkpoints v1-5-pruned-emaonly.safetensors \
-    https://huggingface.co/stable-diffusion-v1-5/stable-diffusion-v1-5/resolve/main/v1-5-pruned-emaonly.safetensors
+#
+# No checkpoints are downloaded by default — the deployment ships expecting
+# you to point at your own model mirror or the public examples below.
+# Whatever filename you pick should match the `ckpt_name` field in
+# workflows/txt2img.json and workflows/img2img.json (the shipped default
+# is CyberRealisticXLPlay_V8.0_FP16.safetensors); update either the
+# script or the workflows so they line up.
 
 # Examples — uncomment what you want.
 

workflows/img2img.json

@@ -17,7 +17,7 @@
   "4": {
     "class_type": "CheckpointLoaderSimple",
     "inputs": {
-      "ckpt_name": "v1-5-pruned-emaonly.safetensors"
+      "ckpt_name": "CyberRealisticXLPlay_V8.0_FP16.safetensors"
     }
   },
   "6": {

workflows/txt2img.json

@@ -17,7 +17,7 @@
   "4": {
     "class_type": "CheckpointLoaderSimple",
     "inputs": {
-      "ckpt_name": "v1-5-pruned-emaonly.safetensors"
+      "ckpt_name": "CyberRealisticXLPlay_V8.0_FP16.safetensors"
     }
   },
   "5": {