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June 16, 2026 Eight releases (v0.9.5 through v0.13.0) shipped this week. Headline: channels mode — your own Claude Code session drives a live ComfyUI sidebar panel over MCP, with no LLM API keys and no per-token billing — and that panel, comfyui-mcp-panel, is now live on the Comfy Registry and ComfyUI-Manager.

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New features

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Channels mode — your own session drives the panel, no API keys

comfyui-mcp --channels hosts a loopback WebSocket bridge (default port 9101, set via COMFYUI_MCP_BRIDGE_PORT) that the comfyui-mcp-panel pack connects to, and registers a family of panel_* MCP tools. The agent — your existing Claude Code (or any MCP client) session, subscription-billed — edits the graph you’re looking at through its normal MCP connection. Every mutation goes through LiteGraph’s change tracking, so ComfyUI’s native Ctrl+Z reverts an agent edit exactly like your own.
The plugin ships --channels on by default, so /plugin install comfy wires the bridge and panel_* tools automatically. See Sidebar Panel and Channels mode configuration.

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The panel grew up — and shipped to the Comfy Registry

The graph-control surface went from “add/remove/wire” to full command of the open tab. New panel_* tools this week: move_node, canvas (fit / center-on-node / pan / zoom), run (queue the open workflow with live widget values), get_errors (last execution error + node validation errors), save_workflow (Ctrl+S or save-as/duplicate), clear (whole-canvas wipe as a single undo), and get_subgraph (drill into a subgraph node). panel_get_graph now reports which graph you’re viewing and summarizes subgraphs shallowly. A multi-tab bridge means each ComfyUI browser tab holds its own identified connection — panel_status lists every tab, and every graph tool accepts an optional tab_id. Previously a second tab silently stole the single connection. The pack itself (v0.3.0) landed its polished public release: a native ComfyUI design-system restyle (PrimeVue semantic tokens, theme-tracking), activity cards for every agent edit, empty-state onboarding, and a “Claude is working…” indicator — now installable by searching comfyui-mcp-panel in ComfyUI-Manager.

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generate_audio — music and SFX from a prompt

A new generate_audio tool generates audio from text, supporting ACE Step 1.5 (music with lyrics, structure, key, language) and Stable Audio 3 (music, instruments, SFX). It builds the right workflow graph, auto-selects local models, and enqueues through the existing pipeline, with two new create_workflow templates (ace_step_15, stable_audio_3). Requires a ComfyUI build with the built-in audio nodes (≥0.11.1). The tool reference now documents all 89 tools. Contributed by @x-yahya997.

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Pairs with the official Civitai MCP

A new civitai plugin skill (16 skills total) pairs the official Civitai MCP with comfyui-mcp instead of proxying it: Claude discovers models on Civitai, hands the model-version id to download_civitai_model, then installs/wires/generates locally. The plugin’s .mcp.json now declares the Civitai MCP directly, so /plugin install comfy auto-wires mcp__civitai__* with no claude mcp add and no API key for browsing (set CIVITAI_API_TOKEN to unlock gated downloads).

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Updates

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Remote-mode guards for local-only tools

A new requireLocalComfyUI() guard and RemoteModeError make local-only operations fail loudly instead of silently writing to a stale local install when you’re targeting a remote ComfyUI. install_comfyui, start_comfyui, stop_comfyui, and restart_comfyui now throw a clear error against a non-loopback --comfyui-url. Contributed by @x-yahya997.

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Faster validation, resumable downloads, provenance locks

A batch of reliability work seeded by josephoibrahim/comfy-cozy:
  • /object_info is memoized for the life of the server process — repeat validate_workflow / dependency-extraction / lock_workflow calls serve from cache (comfy-cozy reports a re-validate dropping from ~7 s to ~0.5 s); the cache resets on stop_comfyui / restart_comfyui.
  • Resumable model downloads — big checkpoint fetches now write to a .partial file and send Range: bytes=N- on retry, so a dropped 40 GB download resumes instead of restarting from byte 0.
  • lock_workflow + verify_workflow_lock — provenance sidecars that SHA-256 every referenced model, record each custom-node pack’s git commit, and surface structured drift on re-verify.
  • Long jobs no longer killed at 10 minutes — the watcher timeout is now COMFYUI_JOB_TIMEOUT_S (default 1800 s), so a 15-minute LTX/WAN render keeps its completion notification.

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model-registry skill + discoverability

A new model-registry skill consolidates download URLs + target models/ subdirs for every model the skills reference (Flux, WAN, LTX, Qwen, Z-Image, shared VAEs/text-encoders). The README, npm description, keywords, and GitHub topics were corrected to the real asset counts (88 tools / 16 skills), and a new /plugin docs page documents the full skill/command/agent/hook surface.

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Fixes

  • Panel messages now reach Claude Code for real. The server was missing the experimental claude/channel capability and sent a flat custom param shape, so the host silently dropped every panel message and only panel_inbox polling worked. It now declares the capability and sends notifications/claude/channel with the expected { content, meta } shape. (The fuller story — and how the panel later moved to an autonomous background agent — is in this post.)
  • list_local_models sees extra_model_paths.yaml redirects and works against remote/cloud ComfyUI — it now queries ComfyUI’s /models/<dir> REST endpoint first instead of only scanning ${COMFYUI_PATH}/models/. Seeded by @joaolvivas.
  • search_custom_nodes returns registry results again.

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Thanks

This week leaned heavily on the community — fork work pulled upstream from @x-yahya997 (audio + remote guards), josephoibrahim/comfy-cozy (memoization, resumable downloads, provenance locks, job-timeout fix), and @joaolvivas (list_local_models). Thank you.
Questions, bugs, or wishlist items? Drop an issue at artokun/comfyui-mcp.