Flux 2 Klein Prompting
nodetool-ai/nodetool
Prompt Black Forest Labs' FLUX.2 [klein] — the subject/environment/style/technical hierarchy it processes in order, guidance-scale and step choices, negative prompts aimed at real failure modes, and…
Train custom AI models (LoRA) on fal.ai for personalized image generation tailored to a brand, character, or style.
Install Fal Train
$ npx skills add nexu-io/open-design --skill fal-train -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install nexu-io/open-design fal-train --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/fal-train .claude/skills/fal-train && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "fal-train" agent skill from https://github.com/nexu-io/open-design/tree/main/skills/fal-train into .claude/skills/fal-train/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fal-train", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/nexu-io/open-design/tree/main/skills/fal-trainType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add nexu-io/open-design --skill fal-train -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install nexu-io/open-design fal-train --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/fal-train .agents/skills/fal-train && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "fal-train" agent skill from https://github.com/nexu-io/open-design/tree/main/skills/fal-train into .agents/skills/fal-train/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fal-train", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add nexu-io/open-design --skill fal-train -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install nexu-io/open-design fal-train --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/fal-train .cursor/skills/fal-train && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "fal-train" agent skill from https://github.com/nexu-io/open-design/tree/main/skills/fal-train into .cursor/skills/fal-train/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fal-train", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/nexu-io/open-design.git --path skills/fal-train--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add nexu-io/open-design --skill fal-train -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install nexu-io/open-design fal-train --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/fal-train .gemini/skills/fal-train && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "fal-train" agent skill from https://github.com/nexu-io/open-design/tree/main/skills/fal-train into .gemini/skills/fal-train/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fal-train", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install nexu-io/open-design fal-trainInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add nexu-io/open-design --skill fal-train -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/fal-train .github/skills/fal-train && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "fal-train" agent skill from https://github.com/nexu-io/open-design/tree/main/skills/fal-train into .github/skills/fal-train/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fal-train", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add nexu-io/open-design --skill fal-train -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install nexu-io/open-design fal-train --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/fal-train .opencode/skills/fal-train && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "fal-train" agent skill from https://github.com/nexu-io/open-design/tree/main/skills/fal-train into .opencode/skills/fal-train/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fal-train", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
fal-train- GitHub stars
- 100k
- Token cost
- ~293 tokens
- SKILL.md length
- 97 words
- Files
- 1
- Skills in repo
- 245
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Train custom AI models (LoRA) on fal.ai for personalized image generation tailored to a brand, character, or style.
- Tasks that involve Fine-tuning
- SKILL.md covers What it does, Source and How to use
- Reaches github.com
- Tasks that involve Image generation
What it does
Fal Train is an agent skill from nexu-io/open-design. Train custom AI models (LoRA) on fal.ai for personalized image generation tailored to a brand, character, or style.
Its SKILL.md is about 290 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in AI & LLM Engineering, covering Fine-tuning and Image generation. It works with fal. The repository describes itself as: 🎨 Best DeepSeek Harness Design Plugin. The open-source Claude Design alternative. 🖥️ Local-first desktop app. 🖼️ Your coding agent becomes the design engine: prototypes… The licence is Apache-2.0.
When your agent uses it
- Tasks that involve Fine-tuning
- Tasks that involve Image generation
Example prompts
- “/fal-train”
What it can do on your machine
Read from SKILL.md and the folder at commit d9dd6fe. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
github.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Fal Train loads about 293 tokens when it runs. Until then it costs about 31 tokens; SKILL.md has 97 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from nexu-io/open-design at commit d9dd6fe, republished under its Apache-2.0 licence (© nexu-io). 97 words, ~293 tokens.
Download SKILL.mdSave it as
.claude/skills/fal-train/SKILL.md (or your agent's skills folder).- name
- fal-train
- description
- Train custom AI models (LoRA) on fal.ai for personalized image generation tailored to a brand, character, or style.
- triggers
- fal train, train lora, custom model, personalized image gen, brand lora
- od.mode
- image
- od.category
- image-generation
- od.upstream
- https://github.com/fal-ai-community/skills
fal-train
Curated from the fal.ai community team.
What it does
Train custom AI models (LoRA) on fal.ai for personalized image generation tailored to a brand, character, or style.
Source
- Upstream: https://github.com/fal-ai-community/skills
- Category:
image-generation
How to use
This catalogue entry advertises the skill in OpenDesign so the agent discovers it during planning. To run the full upstream workflow with its original assets, scripts, and references, install the upstream bundle into your active agent's skills directory:
# Inspect the upstream README for exact paths
open https://github.com/fal-ai-community/skillsThen ask the agent to invoke this skill by name (fal-train) or with
one of the trigger phrases listed in this skill's frontmatter.
© nexu-io, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/fal-train of nexu-io/open-design.
Open the folder on GitHubat commit d9dd6fe
Compare with similar skills
Fal Train next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Fal Train this skillnexu-io/open-design | 100k | — | ~293 | Automated safety check: Pass | Apache-2.0 | |
| Flux 2 Klein Promptingnodetool-ai/nodetool | 560 | — | ~1.4k | Automated safety check: Pass | AGPL-3.0 | |
| Flux Imagedanielmeppiel/agentic-sdlc-handbook | 158 | 1 repos | ~778 | Automated safety check: Pass | Custom licence | |
| Qwen Txt2imgartokun/comfyui-mcp | 800 | — | ~3.3k | Automated safety check: Pass | MIT | |
| Setupguaardvark/guaardvark | 257 | — | ~1.2k | Automated safety check: Pass | MIT | |
| Workflow Template BuilderMooshieblob1/MooshieUI | 207 | — | ~640 | Automated safety check: Pass | AGPL-3.0 |
Similar skills
Flux Image
danielmeppiel/agentic-sdlc-handbook
Generate images with FLUX models (Black Forest Labs) via inference.sh CLI.
Qwen Txt2img
artokun/comfyui-mcp
Build Qwen Image 2512 text-to-image workflows with QwenImageIntegratedKSampler, separate component loading, lightning LoRAs, and fine-tuned model variants
Setup
guaardvark/guaardvark
Connect this agent to a running Guaardvark (self-hosted AI studio) and check what it can do right now.
Workflow Template Builder
Mooshieblob1/MooshieUI
Builds or modifies ComfyUI workflow JSON templates in MooshieUI's Rust backend (src-tauri/src/templates).
9Router Image Generation
decolua/9router
Generates images through a 9Router gateway's image endpoint, with model discovery, the request fields and per-provider quirks for OpenAI, Gemini, MiniMax and others.
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Related
Works with
Categories
Questions about Fal Train
What does Fal Train do?
Train custom AI models (LoRA) on fal.ai for personalized image generation tailored to a brand, character, or style. Fal Train is an agent skill from nexu-io/open-design.ai for personalized image generation tailored to a brand, character, or style.
When should I use Fal Train?
Fal Train fits situations like: tasks that involve Fine-tuning; tasks that involve Image generation.
How do I install Fal Train in Claude Code?
Run `npx skills add nexu-io/open-design --skill fal-train -a claude-code`. Or copy the skill folder (skills/fal-train in nexu-io/open-design) into .claude/skills/fal-train in your project. Claude Code loads it when a task matches its description.
How do I install Fal Train in Codex?
Run `npx skills add nexu-io/open-design --skill fal-train -a codex`. Or copy the skill folder (skills/fal-train in nexu-io/open-design) into .agents/skills/fal-train in your project. Codex loads it when a task matches its description.
Can I use Fal Train in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add nexu-io/open-design --skill fal-train -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/fal-train, .gemini/skills/fal-train, .github/skills/fal-train and .opencode/skills/fal-train in your project.
What does Fal Train need to run?
SKILL.md names no scripts, command-line tools or credentials: Fal Train is instructions for the agent only.
Does Fal Train access the network?
SKILL.md names 1 domain. In commands or code: github.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.
Is Fal Train safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Fal Train use?
Fal Train is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Fal Train use?
About 293 tokens (SKILL.md is roughly 1.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Fal Train?
Skills that share tags, products or a category with Fal Train: Flux 2 Klein Prompting (nodetool-ai/nodetool, 560 stars), Flux Image (danielmeppiel/agentic-sdlc-handbook, 158 stars), Qwen Txt2img (artokun/comfyui-mcp, 800 stars) and Setup (guaardvark/guaardvark, 257 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Fal Train?
nexu-io (a GitHub organization) maintains it in nexu-io/open-design, which has 100,100 GitHub stars. The repository holds 245 skills in this directory. The repository was last updated on October 9, 2026.
Source: nexu-io/open-design on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.