Record segmented node smoke tests

docs/todo.md

@@ -98,6 +98,8 @@ from scaffold to a working Gradio app.
 - [ ] Start Space and confirm Gradio loads.
 - [ ] Start ComfyUI from the Space process.
 - [ ] Submit a minimal prompt to ComfyUI and receive a response.
+- [x] Run a DeepSeek LLM node smoke test.
+- [x] Run a MelBand RoFormer smoke test.
 - [ ] Run a tiny TTS-only workflow.
 - [ ] Run a short ASR-only workflow.
 - [ ] Run SRT split -> VoxCPM -> SRT merge.

docs/work-log.md

@@ -282,6 +282,65 @@ Output reported by ComfyUI:
 audio/api_smoke_voicegate_00001.mp3
 ```
 
+## Segmented Workflow Smoke Tests
+
+### DeepSeek LLM Node
+
+On 2026-06-05, `RH_LLMAPI_NODE` was tested through ComfyUI in Dev Mode using
+the Space `DEEPSEEK_API_KEY` secret. The key was not printed.
+
+Minimal workflow:
+
+```text
+RH_LLMAPI_NODE -> easy showAnything
+```
+
+Prompt:
+
+```text
+Translate to Simplified Chinese: VoiceGate smoke test.
+```
+
+Result:
+
+```text
+status_str: success
+output: VoiceGate 冒烟测试。
+```
+
+This confirms the RunningHub LLM node can read the Space secret and call the
+DeepSeek-compatible API endpoint.
+
+### MelBand RoFormer
+
+On 2026-06-05, `MelBandRoFormerModelLoader` and `MelBandRoFormerSampler` were
+tested through ComfyUI in CPU mode.
+
+Input:
+
+```text
+1 second synthetic 440 Hz WAV generated with ffmpeg
+```
+
+Minimal workflow:
+
+```text
+LoadAudio -> MelBandRoFormerModelLoader -> MelBandRoFormerSampler
+  -> SaveAudioMP3(vocals)
+  -> SaveAudioMP3(instruments)
+```
+
+Result:
+
+```text
+status_str: success
+audio/melband_smoke_vocals_00001.mp3
+audio/melband_smoke_instruments_00001.mp3
+```
+
+CPU-mode runtime for the 1 second smoke input was about 51 seconds. Real runs
+should execute inside a `@spaces.GPU` function.
+
 ## Secrets and API Keys
 
 `DEEPSEEK_API_KEY` should be stored only as a Hugging Face Space Secret.