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setup-ai-studio.sh's director download honored MODEL_DIR, but the ComfyUI assets (image/video/audio) defaulted to a hardcoded /mnt/models/comfyui — so any rig whose models don't live under /mnt failed mid-download with "mkdir: Permission denied" (sumo Discord report, 2026-06-27). Two more walls behind it: the disk-space preflight checked the hardcoded /mnt path and had no override (an idempotent resume under-threshold was blocked), and gpu-mode.sh — which setup calls at step 3 — hardcoded CLUB3090_DIR=/opt/ai/github/club-3090, breaking on any other clone. - New services/comfyui/comfyui-paths.sh: derive COMFYUI_ROOT / COMFYUI_MODELS_DIR as a "comfyui" sibling of MODEL_DIR (read from repo-root .env when unset). Backward-compatible on the rig (/mnt/models/huggingface -> /mnt/models/comfyui); explicit overrides respected. Sourced by setup-ai-studio.sh, download_studio_models.sh, and gpu-mode.sh so the download target, the disk check, and the container mounts all agree. - setup-ai-studio.sh: disk check uses the derived path; add SKIP_DISK_CHECK=1 to bypass the free-space preflight independently of SKIP_DOWNLOAD. - gpu-mode.sh: auto-detect CLUB3090_DIR from the script's real location (resolving the /usr/local/bin symlink), overridable via env — removes the hardcoded path. - The 3 legacy hardcoded download scripts (flux2/hunyuan_llava/models) honor COMFYUI_MODELS_DIR. - New test-comfyui-paths.sh guards the derivation; docs/ai-studio config note. Full suite green (59/59). Claude-Session: https://claude.ai/code/session_01EfF565T9eSLaqGzidyJ1Pm Co-authored-by: noonghunna <[email protected]> Co-authored-by: Claude Opus 4.8 <[email protected]>