comfyui_therock_gpu_test.py --generate-cat derives checkpoint dir from 'folder:' instead of 'models path:' → checkpoint never found

Current behavior

scripts/comfyui_therock_gpu_test.py --generate-cat puts (or looks for) the test checkpoint in the wrong directory, so ComfyUI never lists it and the image-generation step fails:

• After rocm comfyui install (default flow) it downloads the 2 GB checkpoint to ~/.rocm/envs/<runtime>/apps/comfyui/models/checkpoints/ and then fails with
  RuntimeError: ComfyUI does not list checkpoint 'sd-v1-5-tiny.safetensors'. ... Available checkpoints: []
• With --skip-install it looks in ~/.rocm/envs/<runtime>/models/checkpoints/ and fails with
  RuntimeError: checkpoint is missing and downloads are disabled: ~/.rocm/envs/<runtime>/models/checkpoints/sd-v1-5-tiny.safetensors

ComfyUI's actual models folder, printed by both rocm comfyui install and rocm comfyui status, is ~/.rocm/envs/<runtime>/apps/comfyui/source/models.

Expected behavior

The harness should place the checkpoint under the models path: the product reports (<models path>/checkpoints/), so the default --generate-cat flow works without --comfyui-root.

Steps to reproduce

# 1. default flow (downloads 2 GB, then fails)
python scripts/comfyui_therock_gpu_test.py --rocm target/release/rocm --runtime-id <key> --generate-cat --timeout 1200

# 2. cheaper reproduction of the path derivation
python scripts/comfyui_therock_gpu_test.py --rocm target/release/rocm --runtime-id <key> --skip-install --generate-cat --no-download-checkpoint

Reproduced on a6fa76dbca5d767c1190ee47b765d16bad0e4a53 (current main).

Root cause (script)

parse_comfyui_root (line 479) takes the folder: line of the CLI output and ensure_checkpoint (line 544) assumes <folder>/models/checkpoints. But folder: is not the ComfyUI source folder:

• rocm comfyui install prints folder: <env>/apps/comfyui (apps/rocm/src/comfyui.rs:287, app_root), and the source lives in <app_root>/source;
• rocm comfyui status prints folder: <env> (apps/rocm/src/comfyui.rs:135, manifest.runtime_root).

The models path: line, which both commands print right after folder: and which is the correct location, is ignored by the harness. (The inconsistency of folder: itself is filed as #391.)

Possible solution

Parse models path: (^\s*models path:\s*(.+?)\s*$) and use <models path>/checkpoints for ensure_checkpoint; keep --comfyui-root as the override. Workaround today: pass --comfyui-root <env>/apps/comfyui/source explicitly.

Your environment

• rocm-cli channel: nightly (TheRock 10.1.0a20260822, gfx120X-all)
• rocm-cli version (rocm --version): rocm 0.1.0, built from a6fa76dbca5d767c1190ee47b765d16bad0e4a53
• Platform: Linux
• OS / Distro: CachyOS (Arch), kernel 7.2
• GPU/APU: AMD Radeon AI PRO R9700 (gfx1201)
• ComfyUI 0.34.0 installed by rocm comfyui install

Relevant log output

ComfyUI
  action: install
  ROCm install: 10.1.0a20260822 (build 2026-08-22)
  folder: ~/.rocm/envs/therock-10.1.0a20260822/apps/comfyui
  models path: ~/.rocm/envs/therock-10.1.0a20260822/apps/comfyui/source/models
  installed: yes
  AMD GPU: ready (2 devices)
[comfyui-gpu-test] Downloading checkpoint for the cat workflow (2.0 GB expected).
[comfyui-gpu-test] Using checkpoint ~/.rocm/envs/therock-10.1.0a20260822/apps/comfyui/models/checkpoints/sd-v1-5-tiny.safetensors.
...
RuntimeError: ComfyUI does not list checkpoint `sd-v1-5-tiny.safetensors`. If it was just downloaded, restart ComfyUI and run this test again.
Available checkpoints: []

ComfyUI

  installed: yes
  folder: ~/.rocm/envs/therock-10.1.0a20260822
  models path: ~/.rocm/envs/therock-10.1.0a20260822/apps/comfyui/source/models
...
RuntimeError: checkpoint is missing and downloads are disabled: ~/.rocm/envs/therock-10.1.0a20260822/models/checkpoints/sd-v1-5-tiny.safetensors

Additional context

With --comfyui-root <env>/apps/comfyui/source the harness gets past this step. On this machine it then fails inside ComfyUI with hipErrorInvalidValue in the CLIP text encoder; that is a separate problem in the TheRock nightly torch wheel (torch-2.15.0a0+rocm10.1.0a20260822 ships libaotriton_v2.so.0.13.0 without aotriton.images/, so flash/mem-efficient SDPA output is unusable on gfx1201; SDPBackend.MATH and ComfyUI --use-split-cross-attention work). Mentioned only so the GPU lane's red status is not attributed to this script bug; it is not a rocm-cli defect. Related harness issue: #389.

Start in scripts/comfyui_therock_gpu_test.py at parse_comfyui_root (line 479) and ensure_checkpoint (line 544), then review the install and status output showing folder: and models path:. Reproduce with --skip-install --generate-cat --no-download-checkpoint. Done means the checkpoint uses the reported models path/checkpoints directory while --comfyui-root remains an override and the harness reaches the ComfyUI generation step.