# BV Node Pack (ComfyUI) A curated collection of **quality-of-life**, **UI**, and **prompting** nodes for **ComfyUI**, with a strong focus on: - clean graph layouts - Subgraph/Subflow compatibility - metadata-driven pipelines - AST-based prompt tooling (no fragile string parsing) > ⚠️ **Important** > This pack includes **JavaScript UI extensions** for dynamic node behavior. > These extensions fully support **Subgraphs / Subflows**. --- ## 📌 Table of Contents - [Installation](#installation) - [Update & Uninstall](#update--uninstall) - [Node Overview](#node-overview) - [Pipe Nodes](#pipe-nodes) - [UI / Layout Nodes](#ui--layout-nodes) - [Prompt / AST Nodes](#prompt--ast-nodes) - [Util Nodes](#util-nodes) - [Beta Nodes](#beta-nodes) - [Prompt AST Syntax & Markup Guide](#prompt-ast-syntax--markup-guide) - [Example application for AST](#example-application-for-ast) - [Quick Start (BV Pipe)](#quick-start-bv-pipe) - [Notes & Design Principles](#notes--design-principles) - [Changelog](#changelog) --- ## Installation Clone into your ComfyUI `custom_nodes` folder: ```bash cd ComfyUI/custom_nodes git clone https://github.com/BlackVortexAI/bv_nodepack.git ``` Restart ComfyUI and hard-refresh the browser: **Ctrl + F5** --- ## Update & Uninstall ### Update ```bash cd ComfyUI/custom_nodes/bv_nodepack git pull ``` Restart ComfyUI (recommended). ### Uninstall 1. Delete the folder in `custom_nodes` 2. Restart ComfyUI 3. Hard refresh the browser (**Ctrl + F5**) --- ## Node Overview Nodes are grouped by **functional category**. Each section below can be read independently. --- ## Pipe Nodes

BV Pipe Config

Defines the slot layout (names) for a BV Pipe. **Screenshot** > Shows the BV Pipe Config node with a multiline list of slot names. > > ![BV Pipe Config](docs/screenshots/bv_pipe_config.png) **What it does** - Define slot names (1 per line, max 100) - Outputs a single `BV_PIPE` object (the "pipe") **How to use** 1. Add **BV Pipe Config** 2. Enter slot names (one per line) 3. Connect its `pipe` output to **BV Pipe**

BV Pipe

A config-driven carrier node that forwards one pipe connection while exposing named slots. **Screenshots** > Connected state (slots visible) > > ![BV Pipe Connected](docs/screenshots/bv_pipe_connected.png) > Slot override example > > ![BV Pipe Override](docs/screenshots/bv_pipe_override.png) > Subgraph usage > > ![BV Pipe Subgraph](docs/screenshots/bv_pipe_subgraph.png) **What it does** - Shows only the slots defined by the connected **BV Pipe Config** - Allows overriding individual slots - Passes through all untouched slots

--- ## UI / Layout Nodes

BV Subgraph Heading

A UI node that renders a bold header text inside the node. Designed specifically for **Subgraphs/Subflows**: When exposed, the heading is also rendered on the Subgraph node itself. **Screenshots** > Heading inside normal graph > > ![BV Subgraph Heading](docs/screenshots/bv_subgraph_heading.png) > Heading inside Subgraph > > ![BV Subgraph Heading Subgraph](docs/screenshots/bv_subgraph_heading_subgraph.png) > Heading rendered on Subgraph node > > ![BV Subgraph Heading](docs/screenshots/bv_subgraph_heading_subgraph.png) > Editing the heading text (click on header text to edit) > > ![BV Subgraph Heading Edit](docs/screenshots/bv_subgraph_heading_edit.png) **Inputs** - `value` (STRING) — header text - `font_size` (INT) — font size - `show_divider` (BOOLEAN) — optional divider

BV Spacer

A UI-only spacer node used to add vertical whitespace. **Screenshots** > Normal graph > > ![BV Spacer](docs/screenshots/bv_spacer.png) > Inside Subgraph > > ![BV Spacer Subgraph](docs/screenshots/bv_spacer_in_subgraph.png) > Subgraph node view > > ![BV Spacer Subgraph](docs/screenshots/bv_spacer_subgraph.png) > Editing the spacer height (click on spacer to edit) > > ![BV Spacer Edit](docs/screenshots/bv_spacer_edit.png) **Inputs** - `height` (INT) — spacer height in pixels - `scale` (FLOAT, optional) — multiplier

BV Divider

A UI-only divider node that draws a horizontal separator line. **Screenshots** > Divider in graph > > ![BV Divider](docs/screenshots/bv_divider.png) > Divider inside Subgraph > > ![BV Divider Subgraph](docs/screenshots/bv_divider_in_subgraph.png) > Divider rendered on Subgraph node > > ![BV Divider Subgraph](docs/screenshots/bv_divider_subgraph.png) **Inputs** - `thickness` (INT) - `padding` (INT) - `alpha` (FLOAT)

BV Dynamic Combo

**Purpose** - Creates a dynamic combo box from a list of strings **Input** - `prompt` (COMBO, STRING) **Output** - `value_str` (`STRING`) - `value_int` (`INT`) - `value_float` (`FLOAT`)

--- ## Prompt / AST Nodes > These nodes operate on a **structured AST (Abstract Syntax Tree)**, not on raw strings. > This allows safe filtering, switching, inspection, and refactoring of prompts.

BV Prompt Encode

**Purpose** - Parses a tagged prompt into an AST **Input** - `prompt` (STRING, multiline) **Output** - `ast` (`BV_AST`) - `cleaned_prompt` (plain text, no markup, no comments) **Screenshot** > Example output > > ![BV Prompt Encode](docs/screenshots/bv_prompt_encoder.png)

BV Prompt Decode

**Purpose** - Extracts plain text from the AST by category **Key Features** - Multi-category filtering - `any` / `all` matching - Inheritance (parent categories) - Optional prettify pass - If no filter is set, all categories are displayed. **Screenshot** > Example output > > ![BV Prompt Decode](docs/screenshots/bv_prompt_decoder.png)

BV Prompt AST Debug

**Purpose** - Visual inspection of the AST **Features** - JSON pretty-print - Readonly, scrollable output field - Safe for large ASTs **Screenshot** > Example output > > ![BV Prompt AST Debug](docs/screenshots/bv_prompt_ast_debug.png)

BV Prompt Category Switch

**Purpose** - Enable / disable categories directly on the AST - No string parsing **Features** - Enable categories - Disable categories (wins over enable) - `inherit` and `any/all` matching **Screenshot** > Example output > > ![BV Prompt Category Switch](docs/screenshots/bv_prompt_switch.png)

--- ## Prompt AST Syntax & Markup Guide This section explains the **exact prompt syntax** that is parsed into the AST. ### Default (no markup) ```text A beautiful landscape, sunset lighting ``` ### Block categories ```text @@style cinematic lighting @@subject a woman in rain ``` ### Inline categories ```text a portrait with @ green eyes @@ and @ black hair @@ ``` ### Nested inline categories ```text @ a @ smiling woman @@ in rain @@ ``` ### Comments ```text a portrait ## this is a comment ``` ### ⚠️ Common Syntax Pitfalls (Important) Category names must not contain spaces. Inline categories are only recognized if the category name matches this pattern: >[a-zA-Z0-9_-]+ #### ❌ Invalid ```text @ white dress @@ ``` ✅ Valid ```text @ white dress @@ ``` ### Closing inline categories (@@) ```text @@ closes one currently open inline category Extra @@ without an open category are treated as literal text and will appear in the output ``` ### ❌ Invalid (too many closings) ```text @ long dress,@@@@ ``` ✅ Valid ```text @ long dress,@@ ``` ## Example application for AST ![BV AST Example](workflows/workflow_AST_with_pipe.png) --- ## Latent Nodes > A Collection of Latent Nodes.

BV Latent Random Rotate 90

**Purpose** - Rotates a latent by 90 degrees deterministically based on seed if enabled **Input** - `latent` (LATENT) - `seed` (INT) - `enabled` (BOOLEAN) **Output** - `latent` (`LATENT`) - `latent_width` (`INT`) - `latent_hieght` (`INT`)

BV Latent Random Aspect Ratio

**Purpose** - Generates or resizes a latent to a randomly selected aspect ratio based on a seed - Selection is deterministic via seed and configurable via enabled aspect-ratio toggles - Uses a 1:1 base resolution reference (e.g. 1024×1024) commonly assumed for model training **Input** - `latent` (LATENT, optional) - If connected, the current latent resolution is used as the 1:1 base reference - `seed` (INT) - `enabled` (BOOLEAN) - `base_resolution_px` (INT) - Edge length of a square 1:1 reference in pixels (e.g. 1024 = 1024×1024), used when no latent is connected - `use_1_1` (BOOLEAN) – Resolution 1×1 - `use_3_2` (BOOLEAN) – Resolution 3×2 - `use_2_3` (BOOLEAN) – Resolution 2×3 - `use_4_3` (BOOLEAN) – Resolution 4×3 - `use_3_4` (BOOLEAN) – Resolution 3×4 - `use_16_9` (BOOLEAN) – Resolution 16×9 - `use_9_16` (BOOLEAN) – Resolution 9×16 - `use_21_9` (BOOLEAN) – Resolution 21×9 - `use_9_21` (BOOLEAN) – Resolution 9×21 **Output** - `latent` (LATENT) - `latent_width` (INT) - `latent_height` (INT) - `picked_ratio` (STRING)

A Collection of Utility Nodes.

BV Hex Color To Int

**Purpose** - Converts a HEX color code to an INT value **Input** - `prompt` (STRING) **Output** - `color` (`INT`)

## Beta Nodes

BV Control Center ⚠️ BETA

Centralized runtime control for **mute / bypass** states of node groups. **Key Features** - Group-based control - Subgraph-compatible - Dynamic UI reconfiguration **Screenshot** > Configuration > > ![BV Divider](docs/screenshots/bv_controllconfig_button.png) > Selected group > > ![BV Divider](docs/screenshots/bv_controllconfig_dialog1.png) > Define status > > ![BV Divider](docs/screenshots/bv_controllconfig_dialog2.png) >Columns are automatically expanded > >![BV Divider](docs/screenshots/bv_controllconfig_dialog3.png) >After saving the configuration, the `BV Control Center` Node updates itself. > >![BV Divider](docs/screenshots/bv_controllconfig_dialog4.png) >![BV Divider](docs/screenshots/bv_controllconfig_graph1.png) >Here is an example if, for example, Only Preview is active > > ![BV Divider](docs/screenshots/bv_controllconfig_graph2.png)

--- ## Quick Start (BV Pipe) 1. Add **BV Pipe Config** and enter slot names: ```txt model clip vae seed prompt ``` 2. Connect: `BV Pipe Config (pipe)` → `BV Pipe (pipe)` 3. Optionally override individual slots. --- ## Notes & Design Principles - Slot IDs are stable internally (`v_001…v_100`) - Labels are user-defined and dynamic - UI nodes are rendered via JavaScript - All UI nodes support Subgraphs / Subflows - Prompt nodes operate on **AST**, not raw strings --- ## Changelog ### 2026-01-29 - v0.0.24 — Make subgraph UI widgets more rebuild-safe. ### 2026-01-11 - v0.0.23 — Add BV Latent Random Aspect Ratio node. - v0.0.22 — Change the category of BV Dynamic Combo. Add 90 Latent Rotate Node. ### 2026-01-10 - v0.0.21 — Add dynamic combo box node - v0.0.20 — Add a HEX color to INT node ### 2026-01-02 - v0.0.19 — Update README: add AST example image with embedded workflow - v0.0.18 — Add AST Prompting system - v0.0.17 — Changed toggle label system (`BV Control Center`) - v0.0.16 — Renamed inputs to avoid collisions ### 2026-01-01 - v0.0.15 — Fix subgraph renaming bug - v0.0.14 — Widget fixes for subgraph usage ### 2025-12-31 - v0.0.13 — Fix label inversion error - v0.0.12 — Fix input error - v0.0.11 — Reworked renaming logic ### 2025-12-30 - v0.0.10 — Fix widget create event ### 2025-12-29 - v0.0.9 — Fix subgraph issues - v0.0.8 — Major refactor to TypeScript

Name	Type	Description
ast	BV_AST	—
cleaned_prompt	STRING	—

🌀 BV Prompt Encode

Inputs (1)

Outputs (2)