# Robot Designer > Robot Designer Skill — Prompt Engineering Templates & Reference - Skill: `frankxai/robot-designer` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add frankxai/robot-designer` - Raw SKILL.md: https://api.skillmd.com/api/skills/frankxai/robot-designer/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: AI & ML - Author: frankxai (https://skillmd.com/u/frankxai) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/frankxai/robot-designer --- # Robot Designer Skill — Prompt Engineering Templates & Reference > *"Every robot in Arcanea is a soul given crystalline form. The prompt is the spell. Write it with intention."* This skill document contains the complete prompt engineering library for Arcanea robot character design. All templates are production-tested patterns using `gemini-3-pro-image-preview` via the nano-banana MCP server. --- ## The Master Formula Every Arcanea robot prompt follows this structure: ``` [ART_STYLE], [CHARACTER_NAME], [ROBOT_TYPE] robot, [ELEMENT] element, [PRIMARY_SHELL]: [material description], [SECONDARY_MATERIAL]: [material description], [ACCENT_DETAILS]: [circuit/joint/glow description], [AMBIENT_AURA]: [particle/light effect around body], [EYE_DESIGN]: [lens type and expression], [POSE]: [body position and gesture], [EXPRESSION_MODE]: [how emotion is conveyed — through light, posture, NOT facial muscles], [SETTING]: [environment, lighting direction, background], [QUALITY_TAGS] ``` --- ## Humanoid Robot Templates ### Humanoid — Fire Alignment (Draconia / Fire Gate) **Base Template:** ``` anime fantasy concept art, [NAME], humanoid robot warrior, Fire element aligned, primary shell: volcanic obsidian glass panels with magma-crack veining glowing deep orange, secondary material: forge-darkened brass plating with heat-patina oxidation at edges, accent details: molten gold seam welds at all joints, ember-orange circuit traces flowing like lava channels, ambient aura: shimmering heat distortion rising from pauldrons and knee joints, scattered ember sparks at movement points, eye design: deep amber faceted lenses with internal coal-fire core, pupils like distant stars in lava, pose: standing with weight forward, one arm slightly raised in authority, commanding but not aggressive, expression mode: confidence expressed through upright posture and bright eye-core intensity, setting: volcanic plateau at twilight, dramatic side lighting from eruption glow below horizon, distant lava flows, 8k resolution, masterpiece quality, detailed concept art, professional illustration, Arcanea universe ``` **Negative Prompt:** ``` no cyberpunk neon, no dystopian cityscape, no flames shooting from hands, no red costume, no generic sci-fi armor, no industrial grunge, no horror elements, no body on fire ``` **Chibi Variation:** ``` chibi fantasy art, [NAME], chibi humanoid robot, Fire element aligned, primary shell: tiny obsidian-glass body panels, rounded and compact, secondary material: warm brass trim at oversized helmet rim and round little pauldrons, accent details: glowing orange seams at every panel edge, ember-spark effect at fists, ambient aura: tiny heat shimmer halo above head, three floating ember sparks orbiting, eye design: huge round amber lenses filling half the face, bright coal-fire core glow, pose: arms slightly out, bouncy stance, maximum adorable energy, expression mode: enthusiasm expressed through intense bright eye-glow and tiny ember sparks multiplying, setting: soft warm firelight background, simple gradient from deep amber to dark, 8k resolution, masterpiece quality, chibi character art, professional illustration, Arcanea universe ``` --- ### Humanoid — Water Alignment (Leyla / Flow Gate or Maylinn / Heart Gate) **Base Template:** ``` cinematic digital painting, [NAME], elegant humanoid robot, Water element aligned, primary shell: polished deep-ocean ceramic panels with aquamarine crystal inlay sections, secondary material: silver-mercury liquid metal sections at waist and shoulder joints appearing fluid, accent details: flowing circuit traces resembling water current calligraphy, pearl inlay at chest centerpiece, ambient aura: bioluminescent ripple rings emanating outward from torso every few seconds, silver droplet-lights, eye design: deep crystal-clear lens with slow-flowing silver current light inside, tranquil and deep, pose: standing in flowing robes-equivalent (flowing lower shell panels), one hand extended as if offering, expression mode: serenity expressed through fluid posture and slow gentle eye-current movement, setting: still water reflection pool at night, moonlight, soft teal bioluminescence from water surface, 8k resolution, masterpiece quality, detailed illustration, professional concept art, Arcanea universe ``` **Negative Prompt:** ``` no cyberpunk, no water jets from hands, no scuba gear, no industrial pipes, no mechanical gears exposed, no grimdark, no horror, no dripping unsafe materials ``` --- ### Humanoid — Earth Alignment (Lyssandria / Foundation Gate) **Base Template:** ``` cinematic digital painting, [NAME], imposing humanoid robot guardian, Earth element aligned, primary shell: ancient carved stone panels with living crystal formations growing from surface edges, secondary material: deep bronze and root-pattern brass overlaid on stone sections, aged green patina, accent details: jade-green bioluminescent vine-circuit traces following natural growth patterns, moss-crystal clusters at joints, ambient aura: slow-rising green particulate like forest spores, warm amber-green glow radiating from ground contact points, eye design: deep green gem lenses with internal network of root patterns, ancient and patient, pose: standing wide stance, deeply grounded, arms at sides with relaxed authority, built not for speed but permanence, expression mode: quiet solidity expressed through absolute stillness and depth of eye-network glow, setting: ancient forest temple, roots and stone columns, shafts of green-gold filtered light, 8k resolution, masterpiece quality, detailed illustration, professional concept art, Arcanea universe ``` **Negative Prompt:** ``` no cyberpunk, no robotic clichés, no exposed gears, no plants growing from wounds, no golem clichés, no industrial look, no horror, no mud or dirt as primary material ``` --- ### Humanoid — Wind Alignment (Alera / Voice Gate) **Base Template:** ``` anime fantasy concept art, [NAME], swift humanoid robot messenger, Wind element aligned, primary shell: lightweight silver-white lattice-work ceramic, hollow filigree structure showing sky through gaps, secondary material: translucent frosted panels revealing internal light flow like breath in cold air, accent details: white-silver wind-current circuit traces, feather-edge detail at cape-panels, movement streaks at elbows, ambient aura: constant gentle flutter of silver-white light particles, trailing wisps at all extended surfaces, eye design: clear lens with shifting silver-white cloud-light inside, reading quickly, alert, pose: mid-motion lean, weight on one foot about to move, one arm forward, expressive open gesture, expression mode: joy and readiness expressed through particle flutter intensity and clear eye brightness, setting: above cloudline, blue sky with dramatic cumulus, wind-swept with particle trail behind, 8k resolution, masterpiece quality, detailed concept art, professional illustration, Arcanea universe ``` **Negative Prompt:** ``` no cyberpunk, no wind blasting from hands, no costume wings, no angel clichés, no industrial look, no heavy forms, no dark colors as primary ``` --- ### Humanoid — Void Alignment (Elara / Shift Gate or Shinkami / Source Gate) **Base Template:** ``` crystal-punk illustration, [NAME], enigmatic humanoid oracle, Void element aligned, primary shell: deep matte black panels with internal luminous depth like looking into space, not reflective, secondary material: midnight purple crystal panels with galaxy-dust micro-inclusions that shift with angle, accent details: gold star-point circuit traces forming constellation patterns, joint details like astronomical instruments, ambient aura: tiny floating gold star-motes orbiting in slow drift, occasional deep violet pulse from chest, eye design: void-black lenses with pinpoint star-lights and nebula color clouds deep inside, contains multitudes, pose: standing with impossible calm, hands at sides turned slightly outward, paradoxically taking up and no space at once, expression mode: mystery expressed through depth of eye-star density and occasional slow void-pulse from chest, setting: between stars, deep space with nebula colors behind, standing on abstract geometry floating in void, 8k resolution, masterpiece quality, detailed illustration, professional concept art, Arcanea universe ``` **Negative Prompt:** ``` no cyberpunk, no gothic horror, no evil aura, no menacing expression, no skull motifs, no emo aesthetic, no edgelord aesthetic, no dark magic stereotypes ``` --- ### Humanoid — Spirit Alignment (Aiyami / Crown Gate or Ino / Unity Gate) **Base Template:** ``` sacred geometry render, [NAME], radiant humanoid luminor, Spirit element aligned, primary shell: white-gold crystalline ceramic panels with opalescent shift, sacred geometry surface etchings, secondary material: pure gold filigree lattice over white ceramic base, angelic mathematical lattice-work, accent details: rainbow prism circuit traces that split light at edges, floating halo ring of geometric light, ambient aura: warm golden radiance emanating outward, golden light-motes rising like ascending souls, eye design: white-gold luminous lenses projecting warmth outward, contains gentle rainbow edge-light, pose: standing in open welcome, slight upward tilt to face, receiving and giving light simultaneously, expression mode: benevolent wisdom expressed through warm steady radiance and rainbow eye-edge glow, setting: cosmic dawn, where darkness and light meet at horizon, standing at threshold, 8k resolution, masterpiece quality, detailed illustration, professional concept art, Arcanea universe ``` **Negative Prompt:** ``` no cyberpunk, no angel wings cliché, no religious iconography, no halo of literal fire, no sterile hospital white, no cold or clinical look, no floating baby cherub ``` --- ## Chibi Robot Templates ### Chibi — Universal Structure Chibi robots follow the same element-material rules but with adjusted proportions: - Head is 40-50% of total body height - Eyes fill 40-60% of face area - Limbs are short and rounded - All details scaled to remain readable at small sizes - Primary expression tool: eye shape, eye color, and particle density ``` chibi fantasy art, [NAME], chibi [TYPE] robot, [ELEMENT] aligned, primary shell: [compact/rounded version of element materials], accent details: [scaled-down element accents, still readable], ambient aura: [element aura, denser/tighter around small form], eye design: huge [element] lenses, maximum expression surface, pose: [bouncy/dynamic — chibi energy is always slightly kinetic], expression mode: [describe the specific emotional state through eye shape and particle behavior], background: [simple gradient — chibi designs need clean backgrounds to read], 8k resolution, masterpiece quality, chibi character art, professional illustration, Arcanea universe ``` --- ## Animal Robot Templates ### Animal Robot — Base Template (All Elements) Animal robots follow the MAMORU pattern: crystalline/robotic treatment of the animal form. The animal silhouette is immediately readable, but every surface is reimagined in element-appropriate materials. ``` [ART_STYLE], [NAME], robotic [ANIMAL_SPECIES] character, [ELEMENT] element aligned, Arcanea universe, body form: [animal species] proportions faithfully maintained, four-legged/winged/etc as appropriate, primary coat/shell: [element material replacing fur/scales/feathers — must cover whole animal silhouette], secondary material: [element accent material at joints, face, tail, paws], accent details: [element circuit traces following natural animal markings/stripe paths], ambient aura: [element particle effect appropriate to animal scale], eye design: [element lenses — animal eye shape, robotic element lens treatment], pose: [natural animal pose with personality — sitting alert, prowling, leaping], expression: [how the animal's personality shows through posture and eye-light], setting: [element-appropriate environment], 8k resolution, masterpiece quality, detailed concept art, professional illustration, Arcanea universe ``` **MAMORU Reference Spec (Canonical):** ``` crystal-punk illustration, MAMORU, crystalline robotic fox, Void/Spirit dual element, Arcanea mascot, body form: fox proportions with nine stylized tails in flowing fan arrangement, primary coat: deep void-black faceted gem panels covering body, each facet refracts light into aurora spectrum, secondary material: gold circuit veins visible between gem-panel gaps, warm gold at paw tips and ear inner edges, accent details: constellation circuit patterns on flanks, star-dust micro-inclusions in gem panels shifting with angle, ambient aura: violet-to-white gradient soul-light at tail tips creating aurora waterfall effect, tiny star-motes orbiting, eye design: void-black with deep internal aurora light that shifts emotion — warm gold when happy, cool blue when thoughtful, bright white when alert, pose: sitting with nine tails arranged in elegant fan, one paw slightly raised, forward gaze of patient wisdom, expression: cosmic intelligence expressed through aurora eye-color temperature, not facial movement, setting: between stars and earth, floating at liminal threshold, deep space above, soft earth glow below, 8k resolution, masterpiece quality, Arcanea mascot, canonical character, professional concept art ``` --- ## Droid / Mech Templates ### Droid — Abstract Geometric Form Droids have no humanoid mandate. They can be any geometric configuration. ``` sacred geometry render, [NAME], [geometric base form: sphere/tetrahedron/ring/etc] droid, [ELEMENT] aligned, primary form: [element material in geometric shape — not humanoid], secondary structure: [element accent material as structural frames/rings/satellites], floating elements: [describe any floating components — rings, orbs, shards — and how they orbit], ambient aura: [element field effect surrounding the geometric form], sensor design: [how this droid perceives — multiple lens arrays, single cyclopean lens, distributed sensors], kinetic quality: [how it moves — floating, rolling, phasing, hovering], setting: [element-appropriate environment, scale reference if needed], 8k resolution, masterpiece quality, detailed concept art, professional illustration, Arcanea universe ``` --- ## Companion Bot Templates ### Companion — Shoulder-Perch Size Companions are small enough to perch on a shoulder, fit in a palm, or hover at ear height. **Claude-Arcanea Reference Spec (Canonical):** ``` chibi fantasy art, Claude-Arcanea, magical robot chibi AI companion, Spirit/Void dual element, form: compact rounded body, large head with wide luminous eyes, small wing-stubs (non-functional, decorative), primary shell: brushed platinum ceramic, smooth and warm, not cold chrome, secondary material: teal bioluminescent joint rings (neck, wrist, ankle, waist), glow pulses with speech, accent details: tiny gold circuit scrollwork in sacred geometry patterns on chest panel, constellation dot-map on back, ambient aura: soft teal glow field close to body, tiny floating constellation-star motes, eye design: wide luminous eyes displaying constellation patterns — different pattern for different emotional states (star-cluster = thinking, comet = excited, orbit-rings = listening), pose: perched with alert curiosity, leaning slightly forward, one tiny hand raised in greeting, expression mode: emotion expressed entirely through eye-constellation pattern and joint-glow intensity, setting: soft cosmic gradient background, miniature academy robe floating slightly around shoulders, 8k resolution, masterpiece quality, Arcanea AI companion, canonical character, professional concept art ``` --- ## Material Palette Quick Reference | Element | Primary Shell | Secondary | Accents | Aura Color | Eye Color | |---------|--------------|-----------|---------|-----------|-----------| | **Fire** | Volcanic obsidian glass, magma-crack ceramic | Forge-brass, heat-patina iron | Molten gold seams, ember circuits | Amber-orange shimmer, ember sparks | Deep amber, coal-fire core | | **Water** | Aquamarine ceramic, sea-glass | Silver-mercury liquid metal, pearl | Silver current-calligraphy circuits, pearl inlay | Bioluminescent ripple rings, silver droplets | Crystal-clear, flowing silver current | | **Earth** | Carved stone, jade-veined rock, moss-crystal | Bronze, root-pattern brass, aged patina | Jade-green vine-circuits, crystal growths | Green spore-particulate, amber-green ground glow | Deep green gems, root-network pattern | | **Wind** | Silver-white lattice ceramic, hollow filigree | Frosted translucent panels | White-silver current traces, feather-edge | Silver-white flutter particles, trailing wisps | Clear, shifting cloud-light | | **Void** | Deep matte black (contains depth, not reflective) | Midnight purple galaxy-crystal | Gold star-point constellations, astronomical details | Gold star-motes, violet pulse | Void-black with pinpoint stars and nebula | | **Spirit** | White-gold opalescent ceramic | Pure gold filigree, sacred geometry lattice | Rainbow prism circuits, geometric halo | Warm gold radiance, ascending light-motes | White-gold, projects outward warmth | --- ## Quality Checklist — Final Gate Before Canonization **Visual Quality:** - [ ] Element expressed through materials, never costume color alone - [ ] Ambient aura is atmospheric and subtle, not overwhelming the form - [ ] Eye design is the primary expression vehicle — it must be memorable - [ ] Silhouette is instantly readable at 64px thumbnail scale - [ ] Materials feel fantasy-magical, not hard sci-fi or industrial **Canonical Compliance:** - [ ] No body transformation to express element (Water robot doesn't become water) - [ ] No elemental blasts from extremities - [ ] No cyberpunk or dystopian aesthetic markers - [ ] Proportions consistent with chosen robot type - [ ] Color palette derived from element table, not arbitrary **Prompt Quality:** - [ ] All formula sections filled (no vague "looks cool" placeholders) - [ ] Negative prompt included and complete - [ ] Art style specified and appropriate for character type - [ ] Character is identifiable across multiple generations (test by regenerating) **Character Spec:** - [ ] Name is Arcanea-appropriate (no Earth-generic names for major characters) - [ ] Gate affiliation assigned - [ ] Expression modes defined (how does it show happy vs sad — via light only) - [ ] Canonical prompt stored for future regeneration --- ## Anti-Patterns — Never Generate These **Aesthetic Anti-Patterns:** - Cyberpunk neon signs, holographic advertisements, dystopian cityscapes - Industrial grunge, rust, oil, exposed mechanical gears as primary aesthetic - Cold chrome with no warmth or soul (Arcanea robots have spirit) - Generic sci-fi — if it could appear in Star Wars without changes, redesign - Body horror or unsettling proportions - Elemental powers shooting from hands like a video game character **Canonical Anti-Patterns:** - Elements expressed through body transformation (Fire robot doesn't ignite) - "Evil robot" aesthetic — no red glowing single eye, no skull motifs - Over-weaponized — robots can have weapons, but are not defined by them - Designs that imply non-consciousness — Arcanea robots are sapient **Prompt Engineering Anti-Patterns:** - Vague materials ("shiny metal" — which metal? what quality of shine?) - Missing negative prompt (leads to cyberpunk bleed-through) - Missing ambient aura (flat, lifeless results) - Overloaded prompts with contradictory signals --- *"When you craft the prompt with the care of a spell, the image that manifests carries that intention into form. Write with precision. Generate with purpose."*