FLUX Image Best Practices — prompt skill for prompts by model

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Prompt FLUX image models well: structure, JSON prompts, hex colors, typography and multi-reference edits.

• Type: Prompt · Prompts by model
• Slug: flux-image-best-practices
• Status: live
• Publisher: Black Forest Labs (vendor, verified)
• License: MIT
• Source: https://github.com/black-forest-labs/skills/tree/master/skills/flux-image-best-practices
• Works in: Claude Code, Codex, Cursor, Gemini CLI
• Requires: BFL API key (BFL_API_KEY)
• Cost: Billed by Black Forest Labs (API credits)
• Adoption: 332 installs, 135 GitHub stars (skills.sh, 2026-10-26)

What it does

Prompting rules for BFL's FLUX image models across the FLUX.2 and FLUX.1 families, starting from a prompt-structure formula and model selection. Rule files cover text-to-image and image-to-image prompting, structured JSON prompts, hex-color control, typography, multi-reference editing and alternatives to negative prompts.

Use when

• Writing prompts for FLUX
• Exact brand colors or legible text in an image
• Editing with several reference images

Install

• Claude Code: /plugin marketplace add black-forest-labs/skills && /plugin install flux-image-best-practices@black-forest-labs
• Codex: npx skills add black-forest-labs/skills --skill flux-image-best-practices -a codex
• Cursor: npx skills add black-forest-labs/skills --skill flux-image-best-practices -a cursor
• Gemini CLI: npx skills add black-forest-labs/skills --skill flux-image-best-practices -a gemini-cli

Models it drives: flux-2, flux-1

Example output

https://skills.varg.ai/previews/flux-image-best-practices.webp — FLUX typography example from BFL's 'Typography & design' prompting guide: a retro hand-lettered poster reading 'If you love me let me sleep' (credit: Black Forest Labs, https://docs.bfl.ai/guides/usecases_t2i_typography_design)

More prompts by model skills

• fal Prompting: Prompt specific model families well: Kling, GPT Image 2 and Happy Horse guides, loaded only when needed.
• Replicate Prompt Images: Write better image prompts and edits: photographic language, lighting, text rendering, consistent characters.
• Replicate Prompt Videos: Prompt video models like a director: shots, camera motion, four audio layers, dialogue, time-coded beats.
• Video Prompting Guide: Write prompts that video models follow: shot types, camera moves and per-model tips from Veo to Sora.
• FLUX 3 Prompt Doctor: Diagnose a FLUX 3 video brief before spending: resolve missing, conflicting or schema-changing asks.
• AI Film Director (Visual Skills): AI film director for video prompts: dramaturgy first (Murch, blocking, montage), then exact syntax per model.