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marcoleder-plugins

Personal Claude Code plugin marketplace by Marco Leder.

Install the marketplace

/plugin marketplace add marcoleder/claude-plugins

Then install any plugin below with /plugin install <name>@marcoleder-plugins.

Plugins

flux2-prompt-engineering

Battle-tested prompt engineering rules for FLUX.2 image generation (Black Forest Labs flux2-max, flux2-pro, flux2-flex, flux2-klein on Replicate or the BFL API).

The skill auto-activates when you write or debug FLUX.2 prompts. Symptoms it catches: flat lighting, default 3×3 grid layouts, ignored later instructions, wrong colors, miscounted items, vague "professional photo" output.

What it teaches Claude:

  • The 12 rules — exact item counts, hex colors per object, named camera + lens + aperture, per-item positions and angles, named physical shadow sources with explicit angles, micro-cement vs concrete surface terminology, no negatives, no formatting characters, front-loaded item count
  • The 30–80 word sweet spot and why attention degrades past 80 words
  • An 11-step reformulation workflow for verbose or poorly performing prompts
  • A pre-flight checklist to verify a prompt before sending
  • A full before/after example reducing a 150-word verbose prompt to a 90-word conformant one
  • API parameters for Replicate (including the JSON double-escape gotcha)
  • Image editing rules — what works, what doesn't, the LANCZOS crop-and-upscale workaround for geometric resizing
  • Common mistakes table mapping each symptom to its fix

Install:

/plugin install flux2-prompt-engineering@marcoleder-plugins

Trigger examples (after install, just type these and the skill activates):

  • "help me write a FLUX.2 prompt for a hero image"
  • "my FLUX.2 output keeps coming back as a 3×3 grid, why?"
  • "reformulate this verbose prompt for FLUX.2"

Does NOT activate for Stable Diffusion, Midjourney, DALL-E, Imagen, or Ideogram — the rules differ across models and applying FLUX.2 conventions there would degrade output.

Updating

/plugin marketplace update marcoleder-plugins

License

MIT — see LICENSE.