> ## Documentation Index > Fetch the complete documentation index at: https://comfyui-mcp.artokun.io/docs/llms.txt > Use this file to discover all available pages before exploring further. # Week of May 25: v0.6.0 → v0.8.0 > Media uploads, hosted docs, model-download hardening, custom-node authoring + verification, declarative setup, image conversion, and cloud storage I/O. *May 29, 2026* A big week — four releases (`v0.6.0`, `v0.6.1`, `v0.7.0`, `v0.8.0`) landed back to back. Here's what changed for you. ## New features ### Declarative environment setup with `apply_manifest` Spin up a reproducible ComfyUI environment from a single inline object or a JSON / YAML manifest: `pip` packages, custom nodes (registry IDs or git URLs with `@ref` pinning), and model downloads. Idempotent, with a per-item structured report so you can see exactly what was already installed, what just changed, and what failed. See [Install & environment tools](../tools/install-environment). ### Custom-node authoring lifecycle A complete write → test → publish loop, callable from your agent: * **`scaffold_custom_node`** — generate a Python node pack from a template, including `.comfyignore`, `.gitignore`, and (optional) a GitHub Actions workflow that publishes to the Comfy Registry on tag pushes. * **`verify_custom_node`** — restart ComfyUI with a bounded readiness wait and confirm the pack's `NODE_CLASS_MAPPINGS` actually registered. Catches the silent "failed import → tool just doesn't appear" trap. * **`publish_custom_node`** — publish to the Comfy Registry via `comfy-cli`. Your `REGISTRY_ACCESS_TOKEN` is never logged. See [Custom-node tools](../tools/custom-nodes). ### Cloud storage in and out * `download_model` now accepts `s3://` and Azure Blob URLs in addition to HTTPS / Hugging Face, with a new `s3` auth mode. * New **`upload_output`** pushes a generated image to S3, Azure, an HTTP endpoint, or Hugging Face and returns the URL(s). See [Models](../tools/models) and [Assets & images](../tools/assets-images). ### Server-side image conversion New **`convert_image`** re-encodes a generated image (by `asset_id` or output-dir path) to PNG, JPEG, or WebP via `sharp`. Returns inline base64 plus an optional file write, and reports bytes saved — useful for trimming 4 MB PNGs down to \~300 KB WebPs before they leave your machine. See [Assets & images](../tools/assets-images). ### Node discovery agent A new **`comfy-researcher`** agent turns a problem statement ("I need a controllable upscaler that runs on 8 GB VRAM") into ranked custom-node pack recommendations. It searches the Comfy Registry, evaluates candidates, and delegates deep dives to `comfy-explorer`. `generate_node_skill` now ships with a read-through cache keyed by `source@version` (`COMFYUI_SKILL_CACHE_DIR`), so repeat analyses are instant. Pass `refresh` to bypass. See [Defaults, stats, and skills](../tools/defaults-stats-skills). ### Media uploads `upload_video` and `upload_audio` copy local video/audio files into ComfyUI's input directory so workflows can reference them as inputs — mirroring `upload_image` (closes #12). See [Assets & images](../tools/assets-images). ### Hosted documentation The full tool reference now lives at [comfyui-mcp.artokun.io/docs](https://comfyui-mcp.artokun.io/docs), schema-generated from the source so it stays in lockstep with the server. ## Updates ### Model downloads — auth, caching, deduplication * **Per-request auth** for gated and private hosts: `bearer` / `basic` / `header` / `query`. Secrets are validated, redacted from logs, and stripped on cross-origin redirects. * **Content-addressed download cache** with concurrent-download coalescing (no more double-downloading the same checkpoint) and optional LRU eviction. Configure via `COMFYUI_DOWNLOAD_CACHE_DIR` and `COMFYUI_LRU_CACHE_SIZE_GB`. See [Models](../tools/models). ### Custom-node install — pin to a ref `install_custom_node` now accepts a commit, branch, or tag — parsed from the URL (`https://github.com/user/repo@v1.2.0`), an explicit `ref` argument, or a `repo@ref` shorthand. Reproducible installs, no more "works on my machine" because `main` moved. See [Custom-node tools](../tools/custom-nodes). ### Process supervision * **Bounded startup readiness checks** (`COMFYUI_STARTUP_CHECK_INTERVAL_S` / `_MAX_TRIES`) so a slow boot doesn't hang the agent indefinitely. * **Opt-in crash auto-restart** with a bounded budget (`COMFYUI_ALWAYS_RESTART`, `COMFYUI_RESTART_MAX_ATTEMPTS`, `COMFYUI_RESTART_WINDOW_S`) — recover from transient OOMs without spinning forever on a real bug. See [Process control](../tools/process-control). ### Better job error reporting `get_job_status` and completion notifications now surface ComfyUI execution errors with the failing node ID and type, exception type/message, a truncated traceback, `current_inputs`, and an OOM flag — plus optional per-node and total execution timing. Fully additive. See [Workflow execution](../tools/workflow-execution). ### Plugin skills Two new skills bundled for AI assistants: * `comfyui-frontend-extensions` — authoring against the v2 `@comfyorg/extension-api`, including a v1 → v2 migration guide. * `comfyui-node-registry` — node authoring and publishing patterns. ## Fixes * `generate_node_skill`'s cache now resolves the current pack version before lookup, so you never get stale docs after a pack updates. Writes are atomic (temp file + rename with content-hash check). * Spawned ComfyUI child processes now have `error` listeners, so a missing or unexecutable ComfyUI binary can't crash the MCP server itself. * `install_custom_node` git refs are validated and passed via `git checkout --end-of-options `, closing an argv-option-injection vector. * Native dependency build scripts (`better-sqlite3`, `sharp`) are now permitted under pnpm 10's stricter default, so fresh installs no longer silently skip them. ## Experimental An **embedded-agent backend POC** is available behind `COMFYUI_MCP_AGENT_POC`: a `cloudflared` quick-tunnel helper plus an AI SDK `/api/chat` endpoint with bearer auth, a request body cap, and a server-side model allowlist. Not part of default startup. Feedback welcome. *** Questions, bugs, or wishlist items? Drop an issue at [artokun/comfyui-mcp](https://github.com/artokun/comfyui-mcp/issues).