# Aglaea Domain — Features > **Aglaea** — AI-Powered Fashion, Beauty, and Personal Style Platform Aglaea (the Greek goddess of beauty, splendor, glory, magnificence, and adornment — one of the three Charites, or Graces) is a comprehensive fashion, beauty, skincare, haircare, nail care, fragrance, and personal styling platform. It combines computer vision analysis, trend forecasting, fabric intelligence, and AI recommendation engines to deliver hyper-personalized styling advice at scale. The core insight driving Aglaea's design is that personal style advice is only valuable when it accounts for the full picture of the individual. The color of a garment that flatters one person clashes with another's skin undertone; a silhouette that creates visual balance for one body type overwhelms another; a skincare routine that works for oily skin will worsen dry skin. Aglaea builds that complete picture — through analysis of skin, hair, face shape, body proportions, and coloring — and then uses it as the foundation for every recommendation it makes. **Industry-leading SOTA targets** (from `libs/aglaea/README.md`, benchmarked against published reference systems — these are accuracy goals for the analysis and forecasting engines, not measured production numbers): 150+ skin biomarkers, 94%+ body type classification, 91%+ trend forecasting accuracy, 99.99%+ fabric identification, 90%+ virtual try-on conversion lift, 17–28% return rate reduction. Current workspace status: implemented as a pure library domain — 93 packages under `libs/aglaea/`, with no `apps/aglaea/` or `services/aglaea/`. The package inventory in `architecture.md` reflects the current monorepo state. --- ## Table of Contents 1. [Core Platform Infrastructure](#1-core-platform-infrastructure) 2. [Personal Analysis Engines](#2-personal-analysis-engines) 3. [Fashion Intelligence](#3-fashion-intelligence) 4. [Beauty and Skincare](#4-beauty-and-skincare) 5. [Haircare Intelligence](#5-haircare-intelligence) 6. [Nail Intelligence](#6-nail-intelligence) 7. [Fragrance Intelligence](#7-fragrance-intelligence) 8. [Outfit and Wardrobe Management](#8-outfit-and-wardrobe-management) 9. [Virtual Try-On](#9-virtual-try-on) 10. [Shopping Intelligence](#10-shopping-intelligence) 11. [Personalization Engine](#11-personalization-engine) 12. [Conversational AI and Coaching](#12-conversational-ai-and-coaching) 13. [Trend Forecasting](#13-trend-forecasting) 14. [Sustainability Intelligence](#14-sustainability-intelligence) 15. [Social, Community, and Gamification](#15-social-community-and-gamification) 16. [Smart Devices and IoT](#16-smart-devices-and-iot) 17. [Platform, API, and Ethical AI](#17-platform-api-and-ethical-ai) --- ## 1. Core Platform Infrastructure The foundation layer provides the type system, database schema, AI orchestration, event bus, and shared utilities that every other Aglaea library builds on. The six packages in this group — `@aglaea/core`, `@aglaea/database`, `@aglaea/ai-orchestrator`, `@aglaea/sdk`, `@aglaea/events`, and `@aglaea/testing` — have no dependencies on any other Aglaea library, which means they can be updated without affecting the rest of the domain. ### 1.1 Type System (`@aglaea/core`) `@aglaea/core` establishes the domain's shared vocabulary. Every analysis result, recommendation, and entity in the system is expressed in terms of the types defined here, so the entire domain speaks a single, validated language. All types are backed by Zod schemas, which means inputs are validated at module boundaries and type errors are caught at runtime before they propagate into analysis or recommendation logic. - **Color science types**: Colors are represented in RGB, HSL, LAB, and Pantone simultaneously. LAB is the canonical internal space because it is perceptually uniform — equal numeric distances correspond to equal perceived color differences — which color-harmony scoring (Section 8) depends on. Conversion between spaces is lossless within gamut and clamps out-of-gamut values at the sRGB boundary. - **Body measurement types**: Circumference measurements (bust, waist, hips), length measurements (inseam, torso length), and the derived shoulder width are stored in centimeters. Proportional relationships (torso-to-leg, shoulder-to-hip, waist-to-hip ratios) are computed from the raw measurements rather than stored, so they cannot drift out of sync. - **Skin analysis types**: `SkinAnalysisResult` carries a Fitzpatrick phototype (`TypeI`–`TypeVI`), a five-way `SkinType` classification (`Normal`/`Dry`/`Oily`/`Combination`/`Sensitive`), a list of `SkinConcern` values, and eleven named 0–100 dimension scores (hydration, oiliness, elasticity, pigmentation, texture, wrinkle depth, pore size, redness, firmness, clarity, radiance). Ingredient reactions are tracked separately as `IngredientSensitivity` records with a `Mild`/`Moderate`/`Severe` level. - **Fashion taxonomy types**: Garments are classified hierarchically — category (tops, bottoms, dresses), subcategory, silhouette, construction details, and aesthetic style tag — so a query can match at any level of specificity. - **Validation**: Every core type has a Zod schema. Inputs crossing a module boundary are validated at the boundary; a validation failure rejects the input with a field-level error rather than propagating malformed data into analysis or recommendation logic. ### 1.2 AI Orchestration (`@aglaea/ai-orchestrator`) The orchestrator sits between every analysis and recommendation library and the underlying ML inference infrastructure. Rather than each library managing model connections directly, every inference request flows through this single layer. Libraries declare a `ModelCapability` — one of ten values: skin analysis, hair analysis, body analysis, color analysis, outfit recommendation, trend forecasting, fragrance matching, virtual try-on, fabric detection, and style classification — and the orchestrator selects the appropriate model. - **Model registry**: Each model is registered with a `ModelConfig` — id, name, provider (`OpenAI`/`Anthropic`/`HuggingFace`/`Custom`/`RunPod`/ `Replicate`/`Local`), inference endpoint, capability list, version, max batch size, timeout, per-inference cost, and `warmupRequired` flag. Multiple model versions can be registered for the same capability. - **A/B testing**: An `ABTestConfig` routes a configurable `trafficSplitPercent` of inference requests for a capability to a treatment (challenger) model; the orchestrator records `ModelMetrics` per arm so a challenger can be promoted on a measured win rate rather than intuition. - **Fallback strategies**: When a model returns an error or exceeds its configured timeout, the orchestrator retries with the registered fallback model; if no model succeeds, it surfaces a typed `InferenceError` to the caller. - **Priority queuing**: Each `InferenceRequest` declares an `InferencePriority` (`low`/`normal`/`high`/`critical`). Latency-sensitive requests (real-time virtual try-on) are dispatched ahead of batch analysis so an interactive try-on is never blocked behind a bulk job. - **Cost tracking**: Inference cost is attributed per model and per capability, making the cost of each feature visible. - **Warm-up and edge deployment**: Models can be pre-warmed ahead of an expected demand spike, and an `EdgeDeploymentConfig` describes quantized (`int8`/`int4`/`fp16`) edge deployments to a `cpu`/`gpu`/`tpu`/`npu` target. ### 1.3 Data, Events, and Tooling These four packages handle persistence, inter-module communication, external access, and test infrastructure. Together they form the plumbing that lets the 93 libraries coordinate without coupling to each other directly. - **Database layer** (`@aglaea/database`): PostgreSQL with Knex migrations and Zod row schemas. Persists personal profiles, skin/body analysis records, wardrobe items, outfits, product catalog, recommendation records, preferences, feedback, trends, ingredients, fabrics, brands/retailers, social records, and an audit log across sixteen schema modules. Skin analysis and body measurement records are dated history rows so a profile's evolution over time remains reconstructable. - **Event bus** (`@aglaea/events`): Domain events decouple modules — when skin analysis completes, the skincare-routine module updates recommendations from the event rather than being called directly. The full event catalog is Section 17. - **SDK** (`@aglaea/sdk`): Typed TypeScript SDK and browser client for the platform API, with the same types as `@aglaea/core` so consumers share one type definition end to end. - **Testing** (`@aglaea/testing`): Mock factories, fixtures, mock images, benchmarking, chaos, snapshot, and integration-test utilities — so recommendation and analysis logic can be tested across synthetic profiles spanning the full `BodyShape`, `SeasonalSubtype`, and `FitzpatrickScale` range, not just one body. --- ## 2. Personal Analysis Engines Computer-vision analysis of the user's body, face, skin, hair, nails, and coloring forms the foundation of every personalized recommendation. Every analysis writes its result to the unified profile (Section 11), and the result of each analysis advances the profile's `profileCompleteness` score — a 0–100 measure of how many of the analyses are present. The platform uses `profileCompleteness` to drive onboarding: it knows exactly which analyses are missing and prompts for them, and recommendation modules degrade gracefully when a profile is incomplete rather than producing low-confidence output from absent data. ### Skin Analysis (`@aglaea/skin-analysis`, `@aglaea/enhanced-skin-analysis`) Skin analysis takes a high-resolution photograph and runs it through computer vision models, producing a `SkinAnalysisResult`. The `skin-analysis` library implements dedicated per-condition detectors — acne, rosacea, redness and inflammation, pores, oiliness, pigmentation and melasma, sun spots and UV damage, hydration and barrier, wrinkles, crow's feet, forehead/glabellar/ marionette/nasolabial/neck lines, texture, scars, freckles, hypopigmentation, and more — each as its own source module. - **Quantitative scoring**: The result carries eleven named 0–100 dimension scores (hydration, oiliness, elasticity, pigmentation, texture, wrinkle depth, pore size, redness, firmness, clarity, radiance). The score, not a raw pixel measurement, is what routine and treatment logic consumes, so improvements are directly comparable across analyses. - **Concern detection**: Detected `SkinConcern` values (from a twelve-value set: acne, wrinkles, dark spots, large pores, dullness, redness, dehydration, hyperpigmentation, sun damage, texture, undereye circles, sagging) are attached to the result and drive routine and treatment logic. - **Skin tone and type**: Skin tone is placed on the Fitzpatrick phototype scale (`TypeI`–`TypeVI`), the dermatological standard for classifying skin by UV response, and the core `FITZPATRICK_UV_DATA` table maps each phototype to a recommended SPF and burn-time range. `SkinType` is one of `Normal`, `Dry`, `Oily`, `Combination`, or `Sensitive` — each implies a fundamentally different routine, so this classification is a hard input to the skincare-routine builder rather than advisory. - **Longitudinal tracking**: Because each analysis is stored as a dated record, scores can be charted over time, and a regression in a tracked condition can be surfaced proactively — the `skin-analysis` library includes temporal-analysis, progress-comparison, and significance-testing modules for this. - **Before/after comparison** (`@aglaea/before-after`): Pixel-level comparison of two analyses (across time, or before/after a treatment) yields a per-biomarker delta and an aggregate improvement score, so the effect of a routine or treatment is quantified rather than judged by eye. ### Aging Trajectory (`@aglaea/aging-trajectory`) While skin analysis measures current condition, aging trajectory projects how that condition will change over time — helping users understand not just where their skin is today but where it is headed, and what interventions can alter that path. - **Skin age estimation**: Computer vision model estimates the biological age of the skin — which may differ from chronological age — based on measurable biomarker states. - **Aging trajectory prediction**: Evidence-based projection of how the skin is likely to age given current condition and lifestyle factors, with prevention pathway modeling. - **Intervention impact modeling**: Quantify the expected improvement from consistent use of specific active ingredients or treatments, helping users prioritize interventions. ### Color Analysis (`@aglaea/color-analysis`) Color analysis determines which colors of clothing, makeup, and accessories most flatter an individual given their natural coloring (skin, hair, eyes). Its output is a `SeasonalColorPalette` that influences every downstream styling and recommendation decision — from outfit color-harmony scoring to jewelry metal-tone selection. - **Seasonal classification**: The user is classified into one of the twelve `SeasonalSubtype` values — `LightSpring`, `WarmSpring`, `ClearSpring`, `LightSummer`, `SoftSummer`, `CoolSummer`, `SoftAutumn`, `WarmAutumn`, `DeepAutumn`, `DeepWinter`, `CoolWinter`, `ClearWinter` — grouped under four parent `Season` values (Spring, Summer, Autumn, Winter). The 12-season system refines the four seasons along warmth, value, and chroma axes; the `seasonal-classification` module computes those three perceptual axes from LAB skin and hair signals, and each subtype maps to a distinct palette. - **Undertone**: Undertone is resolved to `Cool`, `Warm`, `Neutral`, or `Olive` from the combined skin, hair, and eye signals. Undertone is a primary determinant of flattering color. - **Palette generation**: The output `SeasonalColorPalette` splits colors (in LAB space) into `bestColors` (most flattering), `goodColors` (acceptable but not optimal), and `avoidColors` (clash with the user's coloring), plus a `neutrals` palette for staples and recommended `metalTones` for jewelry. The core `SEASONAL_PALETTE_ANCHORS` table provides anchor colors per subtype. - **Outfit color harmony**: Color-wheel relationships are modeled by the `ColorHarmony` type (`Complementary`, `Analogous`, `Triadic`, `SplitComplementary`, `Tetradic`, `Monochromatic`), and an outfit recommendation's `confidence.colorHarmony` score (0–1) reflects how well its palette agrees with the personal palette and with itself (Section 8). ### Body Analysis (`@aglaea/body-analysis`, `@aglaea/enhanced-body-measurement`) Body analysis produces a body-shape classification, raw `BodyMeasurements`, and a derived `BodyProportions` profile. These three outputs — shape label, absolute measurements, and proportional ratios — each serve different downstream purposes. Shape drives silhouette guidance, measurements feed fit prediction, and proportional ratios determine the visual-balance corrections that make styling advice specific rather than generic. - **Body shape classification**: One of eight `BodyShape` values — `Hourglass`, `Pear`, `Apple`, `Rectangle`, `InvertedTriangle`, `Oval`, `Diamond`, `Athletic` — classified from photographs (94%+ accuracy target). The core `BODY_SHAPE_THRESHOLDS` table defines the ratio thresholds for each shape. Each shape has documented styling strategies for visual balance, so it is a selector for the silhouette-recommendation rule set. - **Precision measurement pipeline**: `BodyMeasurements` captures ten circumference and length values in centimeters — bust, waist, hip, inseam, shoulder, arm length, torso length, thigh, neck, and wrist — estimated from photographs, removing the need for a tape measure when shopping online; these feed fit prediction (Section 3). - **Proportional analysis**: `BodyProportions` computes waist-to-hip, shoulder-to-hip, bust-to-waist, torso-to-leg, and shoulder-to-waist ratios. These ratios — not the body-shape label alone — determine which proportions are most flattering, so two users with the same body shape but different ratios receive different silhouette guidance. - **Silhouette recommendations**: For each body type and proportional profile, the engine recommends garment silhouettes that create visual balance, grounded in established fashion styling principles rather than generic advice. ### Face Shape Analysis (`@aglaea/face-shape-analysis`) Face shape analysis determines which hairstyles, eyewear frames, earring shapes, necklines, and hat styles are most flattering for a given facial structure. Its output feeds multiple downstream libraries — hairstyle recommendations, eyewear selection, and hat styling — so an accurate face shape classification has a wide effect on recommendation quality. - **Face shape detection**: Classify face shape (oval, round, square, heart, diamond, oblong/rectangle) from facial landmark analysis — each shape has specific recommendations for what to emphasize or de-emphasize. - **Hairstyle recommendations**: Suggest flattering hairstyles for the detected face shape (e.g., volume at the sides for a narrow face, minimal width for a round face). - **Eyewear recommendations**: Recommend eyewear frame shapes that complement the face shape — round frames soften angular faces, rectangular frames add structure to round faces (`@aglaea/eyewear-recommendation`). - **Accessory geometry recommendations**: Suggest necklace lengths (shorter necklaces for longer faces, longer for rounder), earring shapes, and hat styles based on face shape proportions. ### Hair Analysis (`@aglaea/hair-analysis`, `@aglaea/enhanced-hair-analysis`) Hair analysis classifies the physical properties of hair that determine which products and routines are appropriate. The same product that adds moisture for one hair type will weigh down another, so accurate classification here directly determines routine quality. - **Hair type and texture analysis**: Classify curl pattern using the Andre Walker system (1A straight through 4C tightly coiled), porosity (how well hair absorbs moisture), thickness (fine/medium/coarse), and density (how many hairs per square inch). - **Scalp health analysis**: Assess scalp condition (dry, oily, sensitive, healthy, flaky) — scalp health directly determines which shampoo and treatment formulations are appropriate. - **Advanced hair profiling**: Comprehensive hair diagnostics including damage assessment (split ends, breakage pattern, heat damage), protein/moisture balance, and chemical processing history analysis. --- ## 3. Fashion Intelligence Deep knowledge of garments, fabrics, style, and fit — the domain-specific expertise that makes the difference between a recommendation engine that knows facts about clothes and one that understands how clothes actually work on real people. ### Fabric Intelligence (`@aglaea/fabric-identification`, `@aglaea/fabric-properties`) Fabric knowledge underpins care instructions, sustainability scoring, comfort prediction, and longevity guidance. Being able to identify fabric from a photograph means none of this intelligence requires the user to read a label. - **Fabric identification from photos**: Identify fabric type (the `FabricType` enum covers twenty types — cotton, silk, wool, linen, polyester, cashmere, denim, leather, and more) from product photographs (99.99%+ accuracy target) — enabling automatic care instructions and sustainability scores without the user reading a label. - **Fabric property database**: Comprehensive fabric database covering care requirements (machine wash vs. dry clean), durability ratings, breathability, drape characteristics, and how each fabric ages. - **Material trend analysis**: Track which fabrics and materials are trending in the market, correlating material choices with trend cycles (`@aglaea/material-trends`). - **Care intelligence**: Garment care and maintenance instructions automatically tailored to the specific fabric composition of each wardrobe item, including washing temperature, drying method, ironing settings, and storage advice (`@aglaea/care-intelligence`). ### Style Taxonomy and Classification (`@aglaea/style-taxonomy`) Style taxonomy is a structured vocabulary for classifying aesthetic identities, occasions, and style personas — necessary for a machine to understand abstract concepts like "minimalist chic" or "Parisian casual." Without a shared taxonomy, every recommendation module would use its own ad-hoc classification scheme, making cross-module consistency impossible. - **Style vocabulary**: Comprehensive classification system for fashion aesthetics (minimalist, maximalist, bohemian, classic, streetwear, preppy, romantic, edgy, vintage), occasions (casual, business casual, formal, athletic, resort), and style personas. - **Garment classification**: Classify garment type (category, subcategory), silhouette (A-line, bodycon, relaxed, structured), construction details (collar type, sleeve style, closure type), and aesthetic style tag. - **Style evolution tracking**: Track how a user's personal style evolves over time — important for long-term recommendation quality and for users undergoing style transformations (`@aglaea/style-evolution`). - **Fashion history library**: Historical context for fashion periods (1920s Art Deco, 1960s mod, 1990s minimalism), movements, and iconic looks — useful for both education and understanding cultural fashion references (`@aglaea/style-history`). - **Celebrity style matching**: Match user to celebrity style references and assist in recreating specific celebrity-inspired looks at accessible price points (`@aglaea/celebrity-style`). ### Fit and Comfort (`@aglaea/fit-prediction`, `@aglaea/comfort-prediction`) Return rates from online fashion retail are driven largely by fit failures — the user's size in one brand is a different size in another, and they have no way of knowing without trying it on. These two libraries address that problem directly. - **Size and fit prediction**: Predict the best size for any specific garment given the user's body measurements — accounting for brand-specific sizing, garment stretch, intended fit (slim, regular, relaxed), and cut style. Targets 0.74+ satisfaction accuracy and 17–28% reduction in return rates. - **Comfort prediction**: Predict comfort scores for garments based on fabric composition, garment construction, and the user's body type — identifying potential fit issues before purchase. ### Inclusive Fashion (`@aglaea/inclusive-fashion`, `@aglaea/cultural-adaptation`) These two libraries ensure Aglaea's recommendations are genuinely useful to the full diversity of its users — not a default range with token additions. - **Size-inclusive recommendations**: Styling recommendations across all size ranges, with specific knowledge of which silhouettes and cuts work across diverse bodies — not just a scaled-down version of standard recommendations. - **Adaptive fashion**: Recommendations for users with adaptive clothing needs — magnetic closures, open-back designs, seated silhouettes, and other functional fashion features. - **Cultural adaptation**: Adjust recommendations for cultural dress requirements and preferences — modesty guidelines, traditional dress integration, cultural occasion wear, and regional aesthetic traditions. --- ## 4. Beauty and Skincare Comprehensive skincare intelligence from product ingredients to personalized routines. The quality of skincare advice depends entirely on understanding what is in the products and how those ingredients interact with a specific skin type — which is why ingredient intelligence is the foundation of this section. ### Ingredient Intelligence (`@aglaea/ingredient-intelligence`, `@aglaea/ingredient-scanner`) Understanding skincare ingredients is essential for building effective routines — most people cannot interpret the INCI (International Nomenclature of Cosmetic Ingredients) names on product labels. These two libraries translate that technical language into actionable guidance. - **Cosmetic ingredient analysis**: Analyze the function (humectant, emollient, occlusant, exfoliant, antioxidant), evidence level (proven, promising, anecdotal), and efficacy of skincare ingredients — explaining what each ingredient actually does. - **Ingredient conflict detection**: Identify conflicting ingredient combinations that can reduce efficacy or cause irritation — e.g., Vitamin C (ascorbic acid) with retinol (both at low pH, but different pH optima), or direct acids with AHAs that disrupt barrier. - **Product label scanning**: Scan and parse product labels to automatically extract and analyze the full ingredient list — no manual input required. - **Skin concern targeting**: Map active ingredients to the specific skin concerns they address — hyaluronic acid for hydration, niacinamide for pores and pigmentation, retinol for aging, salicylic acid for acne. ### Skincare Routines (`@aglaea/skincare-routine`, `@aglaea/beauty-calendar`) A good skincare routine is specific to the person, the season, and the ingredients they are using — and it needs to be updated as any of those change. These two libraries manage both the routine itself and its lifecycle over time. - **Personalized skincare regimen builder**: Build AM and PM routines tailored to skin type, skin concerns, climate (humidity and UV index affect optimal formulations), and product availability — generating step-by-step routines with specific product recommendations. - **Step sequencing**: Correct application order for layering multiple products — generally thinnest to thickest, actives before moisturizers, SPF always last in AM. Incorrect layering reduces product efficacy. - **Seasonal routine adjustments**: Modify routines for seasonal climate changes — switching to richer moisturizers in winter, lighter formulations in summer, adding antioxidants in summer for UV protection support. - **Beauty calendar**: Schedule seasonal routine transitions, treatment appointments, product introduction phases (new actives should be introduced slowly to assess skin response), and product replacement reminders. ### Aesthetic Treatments (`@aglaea/aesthetic-treatments`) For users seeking professional treatment alongside a home routine, this library provides evidence-based guidance on the available options and how they compare. - **Non-invasive treatment recommendations**: Recommend chemical peels (superficial, medium, deep), facials (hydrafacial, microneedling, LED), microdermabrasion, and other aesthetic treatments for specific skin concerns. - **Treatment plan builder**: Build a complete treatment plan with treatment sequencing (some treatments require recovery time before the next), downtime expectations, and maintenance intervals. - **Treatment comparison**: Compare treatment options by expected efficacy, downtime requirements, cost range, and discomfort level for informed decision-making. ### Wellness-Beauty Connection (`@aglaea/wellness-beauty`, `@aglaea/biometric-integration`) Skin condition does not exist in isolation from the rest of the body — sleep quality, stress, hydration, and diet all have measurable effects on skin appearance. These two libraries surface those connections so recommendations can account for the full context. - **Wellness-beauty correlation analysis**: Analyze the connection between wellness behaviors (sleep quality, hydration, diet patterns, stress levels) and visible skin condition — explaining how lifestyle factors manifest in skin appearance. - **Biometric integration**: Use health biometrics from wearables (HRV as a stress proxy, sleep score, activity data) to contextualize skin analysis — explaining why skin looks different on high-stress or poor-sleep days. ### Makeup Recommendations (`@aglaea/makeup-recommendation`, `@aglaea/makeup-looks`) Makeup recommendations are grounded in the same color analysis and facial analysis data as all other Aglaea recommendations — the goal is always to enhance the specific person, not to apply a generic look. - **AI-powered makeup product matching**: Match foundation shades, concealers, and complexion products to specific skin tone and undertone — eliminating the difficulty of finding the right shade when shopping online. - **Makeup looks library**: Curated library of makeup looks organized by occasion, style, and trend, with product-to-look mapping and tutorials. - **Technique recommendations**: Recommend makeup application techniques appropriate for the user's features — eye shape, lip shape, and face shape all affect which techniques are most flattering. --- ## 5. Haircare Intelligence AI-powered haircare advice from routine building to virtual try-on. Hair type and texture determine which products, routines, and styles are appropriate; advice that ignores these properties — recommending the same products for 2A fine hair and 4C coarse hair — is not merely unhelpful but counterproductive. - **Hair routine optimization**: Build personalized haircare routines for specific hair type (curl pattern, porosity, thickness) and goals (growth, moisture, protein balance, color maintenance) — the correct routine is entirely different for 2A fine hair vs. 4C coarse hair (`@aglaea/hair-routine`). - **Hairstyle recommendations**: Recommend hairstyles (length, texture, cut style) based on the combination of face shape, hair type, lifestyle, and maintenance willingness — a recommendation that is flattering but requires 90 minutes of styling daily is not practical for most users (`@aglaea/hairstyle-recommendation`). - **Virtual hair try-on**: Visualize different hair colors and cut styles on the user's photo before making a commitment — reducing the anxiety of major hair changes (`@aglaea/virtual-tryon-hair`). - **Product matching**: Match haircare products (shampoo, conditioner, treatments, styling products) to the specific hair type, porosity level, and concern — porosity in particular determines whether protein-rich or moisture-rich formulations are needed. --- ## 6. Nail Intelligence Nail health analysis, care guidance, and creative styling. - **Nail health analysis**: Assess nail condition including strength (brittleness, breakage patterns), hydration, nail bed health, and signs of nutritional deficiency visible in the nail — such as white spots (trauma or zinc deficiency), vertical ridging (aging or malnutrition), and nail color changes (`@aglaea/nail-analysis`). - **Nail care routines**: Personalized nail care routines for nail type and growth goals — strengthening protocols, cuticle care, hydration strategies, and the optimal filing technique for each nail shape (`@aglaea/nail-care`). - **Virtual nail try-on**: Visualize nail art designs, color swatches, nail shapes (square, round, almond, stiletto, coffin/ballerina), and gel vs. natural finishes on the user's actual hand photo before booking a nail appointment (`@aglaea/virtual-tryon-nails`). --- ## 7. Fragrance Intelligence AI-powered scent profiling and fragrance recommendations, implemented in `@aglaea/fragrance-intelligence` (scent-profile, fragrance-matching, and application-guide modules) over the core `FragranceProfile` type. The challenge of fragrance discovery is that you cannot smell a product online — the library addresses this by building a detailed olfactory preference model from stated preferences, known dislikes, and occasion requirements, then matching that model to a fragrance database. - **Scent profile creation**: Build a detailed olfactory preference profile — preferred `FragranceFamily` values (twelve: floral, oriental, woody, fresh, citrus, aromatic, chypre, fougère, gourmand, aquatic, green, musk), individual preferred and avoided notes (each note positioned `Top`, `Middle`, or `Base` in the scent pyramid), per-occasion and per-season preferences, and a preferred concentration tier. - **Fragrance recommendations**: Recommend perfumes and colognes from the user's scent profile (90%+ first-pick match target) — reducing the difficulty of fragrance discovery when smelling online is impossible. - **Fragrance layering**: Suggest complementary fragrances for layering to create unique scent combinations — the practice of applying multiple fragrances simultaneously to create a personalized bespoke scent. - **Occasion matching**: Recommend fragrances appropriate for specific occasions — some fragrances project more powerfully (suitable for evenings but overwhelming in offices), others are lighter (appropriate for sport or daytime professional settings). - **Seasonal scent guidance**: Adjust fragrance recommendations seasonally — heavier, warmer oriental and woody fragrances perform better in cold weather; lighter citrus and aquatic fragrances suit summer heat and humidity. --- ## 8. Outfit and Wardrobe Management Complete digital wardrobe management and AI-powered outfit generation. The wardrobe is the inventory that the outfit engine draws from — building the digital wardrobe once enables every subsequent outfit recommendation to work from the user's actual clothes rather than generic catalog items. ### Outfit Recommendation (`@aglaea/outfit-recommendation`, `@aglaea/occasion-engine`) The outfit engine produces an `OutfitRecommendation`: a list of wardrobe item IDs, a multi-dimensional `RecommendationConfidence`, styling notes, a rationale, alternative-swap suggestions, and an optional achieved `ColorHarmony` type. - **AI outfit generation**: Combinations are assembled from the user's digital wardrobe and scored by `RecommendationConfidence` — an object of seven 0–1 scores: `overall`, `styleMatch`, `colorHarmony`, `occasionFit`, `trendAlignment`, `bodyFlattery`, and `weatherAppropriateness`. The scores are surfaced separately so a user can see, for example, that an outfit is color-perfect (`colorHarmony` high) but a style mismatch (`styleMatch` low). - **Occasion engine**: An outfit is generated for a specific `OccasionType` — one of fifteen values: `Casual`, `Business`, `BusinessCasual`, `Formal`, `BlackTie`, `Cocktail`, `DateNight`, `Wedding`, `Interview`, `Outdoor`, `Beach`, `Festival`, `Travel`, `Gym`, `Lounge`. The related `DressCode` enum (`WhiteTie` through `Resort`) refines the formality band. Each occasion defines a formality band and acceptable silhouettes; the `occasion-engine` library also covers event styling and travel packing. - **Weather-aware styling** (`@aglaea/weather-service`): The recommendation takes a `WeatherContext` — min/max temperature, humidity, precipitation type, UV index, wind speed — and filters or layers garments accordingly, so a cocktail outfit for a cold, wet evening differs from the same occasion in summer heat. - **Calendar-aware styling** (`@aglaea/calendar-integration`): Reading the user's calendar, the engine prepares an outfit for an upcoming event and surfaces it the evening before, mapping the event type to an `OccasionType`. - **Event preparation** (`@aglaea/event-prep`): For a specific event, builds a complete plan — garments plus shoes, bag, and jewelry — as a coordinated set rather than independent recommendations. - **Feedback loop**: Recommendation feedback is captured via the `recommendation.accepted` / `recommendation.rejected` events (with a rating or reason) and consumed by preference learning (Section 11). ### Digital Wardrobe (`@aglaea/wardrobe-management`) Each garment is a `WardrobeItem` record carrying category, subcategory, brand, name, colors, pattern, fabric (and optional blend), size and size region, formality, style, applicable seasons and occasions, condition, purchase price and date, care instructions, image URLs, tags, and a `wearHistory`. - **Photograph and catalog**: The `digitization` module analyzes a photograph of a garment to extract its category, color, brand, and style attributes automatically, so building the digital inventory does not require manual data entry per item. - **Cost-per-wear analytics**: Each item carries a `wearCount` counter and a dated `wearHistory`. The analytics module derives a `CostPerWear` value (purchase price ÷ wear count) and an `ItemROI` per item — making the true value of an item visible, since a frequently worn item trends toward zero while an unworn item's cost-per-wear stays at its full purchase price. - **Item state**: An item carries `isFavorite`, `isArchived`, `storageLocation`, `needsRepair`, and `repairNotes` flags. Archived items are excluded from the active wardrobe; a donation queue tracks items being retired. - **Wardrobe gap analysis**: The `optimization` module compares the inventory against the user's lifestyle profile and usage patterns to produce a `WardrobeGap` report, a `RedundancyReport`, and `VersatilityScore`s, distinguishing genuine gaps from items already owned but rarely worn, and can generate a `CapsuleWardrobe` from existing items. - **Laundry and care integration** (`@aglaea/laundry-integration`): Wear-count thresholds trigger laundry reminders, and each garment's care instructions are derived from its fabric composition. - **Digital product passport** (`@aglaea/digital-product-passport`): Surfaces provenance, material composition, authenticity verification, and sustainability certifications for items that carry a digital product passport, the per-item record now required under EU regulation. ### Accessories Each accessory library scores candidate pieces against the relevant slice of the unified profile — face shape, body proportions, color palette, outfit formality — and the colors of the outfit it is being matched to, returning ranked recommendations rather than a generic catalog. Each accessory type has its own matching logic reflecting the specific geometry of the item. - **Jewelry** (`@aglaea/jewelry-recommendation`): Recommends a jewelry style (delicate, statement, vintage, modern) and metal (gold, silver, mixed) by matching metal warmth to the user's color undertone and scaling piece prominence to the outfit's formality and neckline — delicate pieces for high necklines, statement pieces for open ones. - **Fine jewelry** (`@aglaea/advanced-jewelry`): Adds investment-grade expertise — gemstone identification, the 4Cs diamond grading (cut, color, clarity, carat), metal alloy assessment, and authentication guidance — so a significant purchase is evaluated on quality grade and provenance, not styling alone. - **Watches** (`@aglaea/watch-recommendation`): Matches a watch class — dress, sport, or casual — to outfit formality (a dress watch for `black_tie`, a sport watch for `sport_active`) and to the user's personal style. - **Bags** (`@aglaea/bag-recommendation`): Selects a handbag by occasion and outfit formality, scales the bag's size to the user's body proportions so it neither overwhelms a petite frame nor looks undersized on a tall one, and accounts for stated carrying needs (laptop, travel). - **Hats** (`@aglaea/hat-recommendation`): Recommends a hat shape (fedora, wide-brim, baseball cap, beanie, beret) chosen for the user's face shape — brim width balances face proportions — and the occasion. - **Scarves** (`@aglaea/scarf-styling`): Recommends scarves whose color sits in the personal palette and suggests a styling technique (Parisian knot, loop, drape) flattering for the user's face shape and the outfit's neckline. - **Belts** (`@aglaea/belt-styling`): Selects belt width, material, and buckle for the outfit, and recommends placement (waist vs. hip) to create the visual effect of a defined waist appropriate to the user's body type. - **Shoes** (`@aglaea/shoe-recommendation`): Recommends footwear by heel height, toe silhouette (pointed, round, square, platform), and material, balancing the occasion and outfit against the user's stated comfort tolerance — a high heel is suppressed for a user who has flagged comfort as a priority. Eyewear recommendation is documented under Face Shape Analysis (Section 2), where it scores frame shapes against the detected face shape. --- ## 9. Virtual Try-On Visualize garments, beauty products, and accessories before purchasing. The primary goal of this section is reducing return rates — pre-purchase visualization aimed at closing the gap between how a product looks in a catalog photo and how it will look on the specific user. - **Fashion virtual try-on**: Virtually try on clothing items on the user's body model generated from their measurements and photos — seeing how a specific garment's silhouette, fit, and drape would look without trying it on in person (`@aglaea/virtual-tryon-fashion`). - **Makeup virtual try-on**: Try on makeup looks (foundation shades, lipstick colors, eyeshadow palettes, blush placement) in real time using augmented reality on the live camera feed or on a photo (`@aglaea/virtual-tryon-makeup`). - **Hair virtual try-on**: Visualize hair color changes (highlights, all-over color, balayage), cut length changes, and different curl/texture treatments on the user's actual photo (`@aglaea/virtual-tryon-hair`). - **Nail virtual try-on**: Preview nail art designs, colors, shapes, and finishes on the user's actual hands in a photo (`@aglaea/virtual-tryon-nails`). - **Accessories virtual try-on**: Preview jewelry (earrings, necklaces, rings), sunglasses, hats, and bags on the user's photo (`@aglaea/virtual-tryon-accessories`). - **Avatar creation**: Generate a photorealistic digital avatar from user photos for try-on experiences — the avatar captures the user's body proportions, skin tone, hair, and facial features (`@aglaea/avatar-creation`). - **Smart mirror integration**: Drive smart mirror devices with outfit suggestions, virtual try-on overlays, and analysis displays — the smart mirror becomes an interactive styling assistant in the user's home (`@aglaea/smart-mirror`). - **Before/after visualization**: Side-by-side before/after comparison for skincare progress, makeup looks, hairstyle changes, and wardrobe transformations (`@aglaea/before-after`). --- ## 10. Shopping Intelligence AI-powered product discovery, matching, and concierge shopping. These libraries connect the personal profile to the external retail world — helping users find products that will actually work for them, at the right price point, across multiple retailers. - **Personal shopper AI**: Conversational AI shopping assistant that finds items matching the user's style profile, size, budget, and aesthetic — essentially a virtual personal shopper available 24/7 (`@aglaea/personal-shopper-ai`). - **Shopping assistant**: Structured product discovery, comparison tools, filtering by style attributes, and shortlisting — for users who prefer browsing to conversation (`@aglaea/shopping-assistant`). - **Shopping concierge**: Premium high-touch shopping service for luxury and special occasion purchases — involving research, quality assessment, and provenance verification for significant fashion investments (`@aglaea/shopping-concierge`). - **Agentic shopping**: Autonomous shopping agent that proactively researches items matching the user's wishlist criteria, monitors prices, tracks restocks, and surfaces opportunities without requiring the user to initiate a search (`@aglaea/agentic-shopping`). - **Product matching**: Find visually and functionally similar products across multiple retailers at different price points — enabling the user to find the look they want at their budget. - **Retailer API integration**: Connect product catalogues from multiple retail partners with standardized data normalization, availability checking, and real-time pricing (`@aglaea/retailer-api`). - **Skincare product matching**: Match skincare products to the user's skin analysis profile and concerns — filtering out products with irritating ingredients for sensitive skin, ensuring actives target the detected concerns. --- ## 11. Personalization Engine Deep learning systems that understand and evolve with each user. The personalization engine is what separates Aglaea from a generic product recommender — it builds a model of each individual that improves with every interaction and persists that model across sessions. - **Preference learning**: ML pipeline that learns individual style and product preferences from explicit feedback (likes, saves, purchases) and implicit signals (dwell time, click-through, outfit assembly choices) — improving recommendations with every interaction (`@aglaea/preference-learning`). - **Lifestyle profiling**: Analyze lifestyle, activities (professional, casual, athletic, evening, travel), social context, and aspirational identities to inform recommendations that fit actual life rather than an idealized version (`@aglaea/lifestyle-profiler`). - **Unified user profile**: Aggregate signals from all modules — skin analysis, body analysis, color analysis, hair analysis, style preferences, purchase history — into a coherent cross-module user profile (`@aglaea/unified-profile`). - **Long-term memory system**: Interaction memory that retains long-term context about preferences, past feedback, style evolution, and stated goals — preventing the system from forgetting the user's preferences between sessions (`@aglaea/memory-system`). - **Family features**: Extend styling to family members — shared preferences across household members, group shopping, and managing multiple profiles within one household account (`@aglaea/family-features`). --- ## 12. Conversational AI and Coaching Natural language interaction for style guidance and education. These libraries give users a way to express what they need in ordinary language — including the vague, subjective descriptions that are natural when talking about personal style — and receive concrete, actionable guidance in return. ### Conversation Engine (`@aglaea/conversation-engine`) The conversation engine handles multi-turn dialogues where context from earlier turns affects the meaning of later ones. Without context retention, a follow-up like "show me that in a warmer color" is unresolvable. - **Style vocabulary understanding**: Interpret vague or subjective style descriptions ("I want to look more put-together but still approachable") and translate them into concrete product and outfit recommendations. - **Context retention**: Multi-turn dialogue management that remembers earlier conversation context — "show me something similar but in a warmer color" requires remembering what was shown before. - **Intent classification**: Classify user intent (browsing, seeking advice, planning an outfit for a specific occasion, comparing options) to provide contextually appropriate responses. - **Entity extraction**: Extract fashion-relevant entities from natural language — colors, garment types, occasions, budget ranges, brands, and style descriptors. - **Preference extraction from conversation**: Learn style preferences from conversational exchanges without requiring explicit rating input. - **Clarifying question generation**: When requests are ambiguous, generate targeted clarifying questions that narrow down the intent efficiently. ### Style Coaching (`@aglaea/style-coaching`) Style coaching teaches the principles behind recommendations rather than just delivering them — building the user's long-term styling capability alongside their immediate outfit choices. - **Style rule education**: Explain why specific combinations work or don't work, teaching the underlying principles (color theory, proportion, visual balance) rather than just issuing prescriptive recommendations. - **Body-specific advice**: Provide styling advice specific to the user's body proportions, explaining the visual reasoning behind each recommendation. - **Confidence-building messaging**: Frame style guidance positively — building the user's confidence in their aesthetic identity rather than implying their current style is wrong. - **Transition guidance**: Help users navigate life style transitions (career change, post-pregnancy, weight change, moving to a different climate) with specific wardrobe strategy advice. ### Multi-Modal Input (`@aglaea/multi-modal-input`) Users naturally want to describe what they mean using images as well as words. This library enables queries that combine photos, voice, and text into a single request. - **Voice, image, and text together**: Process voice queries, uploaded photos, and text simultaneously — e.g., "What should I wear with this?" (with a photo) processed as a unified query. - **Photo inspiration parsing**: Extract style attributes from inspiration images — Pinterest boards, runway screenshots, celebrity photos — and translate them into actionable product recommendations. --- ## 13. Trend Forecasting AI-powered trend detection and lifecycle prediction (`@aglaea/trend-forecasting`). Trend intelligence matters because the shelf-life of a fashion purchase depends on whether the item is a trend or a classic — a micro-trend may be unwearable in two seasons, while a macro-trend can be worn for years. The forecasting engine helps users invest in the right items. - **Trend detection from multiple signals**: Identify emerging trends by aggregating signals from runway collections, fashion week coverage, social media (Instagram, TikTok, Pinterest), street style, and retail sell-through data. - **Trend prediction**: Forecast trend adoption curves (which trends will go mainstream and when) and peak timing with 91%+ accuracy — distinguishing between micro-trends (short cycle, specific demographic) and macro-trends (broad, multi-season). - **Trend lifecycle mapping**: Track trends from emergence (visible on runways and early adopters) through mainstream adoption (available at mid-market retailers) to saturation (widely available) and decline (no longer aspirational). - **Material and fabric trends**: Forecast which fabrics and material properties (texture, transparency, structure) will trend alongside silhouette and color trends (`@aglaea/material-trends`). - **Personalized trend relevance**: Filter global trend signals to those relevant to the individual user's style profile and lifestyle — a trend in office wear is irrelevant to someone who works from home. - **Generative design**: AI-generated fashion design concepts (mood boards, colorways, silhouette sketches) based on synthesized trend intelligence — useful for designers and stylists using Aglaea as a creative tool (`@aglaea/generative-design`). --- ## 14. Sustainability Intelligence Environmental and ethical intelligence for conscious fashion choices. The fashion industry is one of the world's largest polluters, and purchasing decisions are one of the primary levers consumers have. These libraries make the environmental cost of each decision visible and findable. - **Sustainability scoring**: Score garments and brands on environmental impact — carbon footprint per garment (considering fiber, dyeing, manufacturing, and transport), water consumption, chemical use, and end-of-life recyclability (`@aglaea/sustainability-scoring`). - **Sustainable fashion intelligence**: Identify sustainable alternatives, eco-friendly brands (B Corp, GOTS certified, Fair Trade), secondhand options, and conscious shopping strategies (`@aglaea/sustainable-fashion`). - **Digital product passport**: Verify product provenance, material composition traceability, authenticity (anti-counterfeit), and certification status — using the digital product passport infrastructure now required under EU Digital Product Passport regulations (`@aglaea/digital-product-passport`). - **Care and longevity guidance**: Extend garment lifespan through proper care — reducing the environmental impact of fashion by keeping items out of landfill longer. The most sustainable garment is the one already in the wardrobe (`@aglaea/care-intelligence`). --- ## 15. Social, Community, and Gamification Social features connecting style-minded users, plus engagement mechanics to make the styling journey motivating. Building personal style is a long-term process, and community and gamification provide the ongoing engagement that sustains it. - **Style communities**: Join interest-based communities organized around style aesthetics (minimalism, vintage, cottagecore, streetwear, business professional) and engage with others who share those aesthetic interests (`@aglaea/style-communities`). - **Outfit sharing**: Share outfit compositions with the community — a daily look post, an event outfit request, or a before/after style transformation (`@aglaea/outfit-sharing`). - **Inspiration feed**: Curated style inspiration feed personalized to the user's aesthetic profile and seasonal trends — more personalized than a generic fashion feed (`@aglaea/inspiration-feed`). - **Expert network**: Access to vetted human stylists and image consultants for paid consultations, wardrobe audits, and personal shopping services (`@aglaea/expert-network`). - **Style coaching integration**: AI style coaching supplemented by human expert escalation for complex or nuanced style situations (`@aglaea/style-coaching`). - **Gamification — achievements and challenges**: Style-oriented achievement system with badges earned for milestones (first virtual try-on, completing a full wardrobe catalog, 30-day skincare streak), multi-tier challenges (e.g., "build 7 complete outfits from existing wardrobe items"), leaderboards comparing style consistency scores, point rewards, and a GamificationProfile that tracks the user's progress across all engagement mechanics — making the ongoing process of building personal style intrinsically motivating (`@aglaea/gamification`). --- ## 16. Smart Devices and IoT Connect Aglaea to smart devices in the home and on the body. These integrations extend the platform beyond the phone screen — into the mirror the user looks at each morning, the closet where their clothes live, and the wearable that monitors their health. - **Smart mirror integration**: Drive smart mirror devices (MIRROR, Capstone Connected Mirror, etc.) with real-time outfit suggestions, virtual try-on overlays, skin analysis, and daily styling briefs displayed in the mirror as the user gets ready (`@aglaea/smart-mirror`). - **Smart device ecosystem**: Connect to IoT devices — smart closets with automated inventory tracking via RFID, connected hangers that track which items are worn, NFC tag readers for garment identification (`@aglaea/smart-device`). - **Biometric integration**: Use wearable health data (skin hydration sensors, stress indicators from HRV, sleep quality) to contextualize beauty and styling recommendations — e.g., recommending extra hydration-focused skincare after a poor sleep score (`@aglaea/biometric-integration`). --- ## 17. Platform, API, and Ethical AI Programmatic access to the full Aglaea platform, the event catalog that decouples its modules, and the bias controls wired into the recommendation pipeline. ### 17.1 API and SDK `@aglaea/api-services` defines every endpoint as a typed `RouteDefinition`, aggregated by an endpoint registry under base path `/api/v1` (API version `v1`). The registry holds 64 endpoints across seven modules; `@aglaea/sdk` exposes high-level client methods over a subset of them. All endpoints require authentication except the Trends/Discovery group, where eight endpoints are `optional` or `required`. | Module | Count | Representative endpoints | | ---------------- | ----- | --------------------------------------------------------------------------------------------- | | Profile | 10 | `GET`/`POST`/`PUT`/`DELETE /profiles/:profileId`, `/profiles/:profileId/preferences` | | Analysis | 10 | `POST /analysis/{skin,color,face-shape,body,hair,nails}`, `POST /analysis/compare` | | Recommendation | 10 | `POST /recommendations/{outfit,shopping,color-palette,skincare-routine,makeup-look}` | | Wardrobe | 10 | `GET`/`POST /wardrobe/:profileId/items`, `/wardrobe/:profileId/{analytics,gaps,capsule}` | | Virtual try-on | 8 | `POST /tryon/{fashion,makeup,hair,nails,accessories,avatar}` | | Conversation | 8 | `POST /conversations`, `POST /conversations/:sessionId/message` | | Trends/Discovery | 8 | `GET /trends`, `GET /trends/forecast`, `GET /discovery/inspiration`, `POST /discovery/search` | The full endpoint list is in `specifications.md` §5. ### 17.2 Domain Events Two event surfaces exist. `@aglaea/events` is the runtime typed event system — modules communicate through it rather than direct calls, so a consumer reacts to an event without the producer knowing it exists (when skin analysis completes, the skincare-routine module updates from the event). It defines an `AGLAEA_EVENT_TYPES` const of 23 event type strings across five groups, each with a typed payload interface: | Group | Event type strings | | ------------------ | ------------------------------------------------------------------------------------------------------- | | Analysis (5) | `aglaea.analysis.{skin,body,hair,color}-completed`, `aglaea.analysis.failed` | | Recommendation (5) | `aglaea.recommendation.{outfit-recommended,shopping-recommended,style-tip-generated,accepted,rejected}` | | Wardrobe (6) | `aglaea.wardrobe.{item-added,item-removed,item-worn,item-updated,outfit-created,outfit-rated}` | | Purchase (4) | `aglaea.purchase.{completed,wishlist-added,cart-abandoned,return-initiated}` | | Social (4) | `aglaea.social.{profile-followed,outfit-shared,style-board-created,style-board-liked}` | Every event is wrapped in a `DomainEvent` envelope carrying `id`, `type`, `timestamp`, `version`, `source`, optional correlation/causation IDs, and the typed `payload`. For example, `SkinAnalysisCompletedPayload` carries `profileId`, `analysisId`, `skinType`, `fitzpatrickType`, `overallScore`, `concerns`, and `timestamp`. Separately, `@aglaea/api-services` declares 39 `EventDefinition` contract records (with `type`, `description`, `payload` schema name, `topic`, and `version`) for documentation and contract generation; the full catalog is in `specifications.md` §6–7. ### 17.3 Ethical AI as a Pipeline Constraint (`@aglaea/ethical-ai`) Ethical AI is a bias-testing and representation-scoring layer over model outputs rather than a post-hoc audit. The `bias-engine` runs paired bias tests across the six `BiasType` dimensions — skin tone, body type, age, ethnicity, gender, and disability — and the library also covers intersectional bias, fairness metrics, inclusive language, adaptive-fashion database gaps, remediation planning, and model-card transparency. - **Bias metrics**: For each pair of demographic groups, a `BiasMetric` computes a disparate-impact ratio (ideal 1.0) and statistical parity (ideal 0) from the two groups' accuracy figures, and flags whether the pair passes. - **Skin-tone bias** (`testSkinToneBias`): Tests model accuracy across all Fitzpatrick skin-tone pairs (`FitzpatrickSkinTone` I–VI), catching models that perform more confidently for some skin tones. - **Body-type bias** (`testBodyTypeBias`): Tests accuracy across `BodyTypeCategory` groups (petite, slim, average, athletic, curvy, plus-size), so the engine does not serve some bodies better than others. - **Representation scoring**: A `RepresentationScore` measures the diversity index (entropy-based, 0–1) of demographic representation, rolling up to an overall diversity score, so AI-generated content does not narrow onto a single demographic. ### 17.4 Knowledge and Data - **Sophia integration** (`@aglaea/sophia-integration`): Draws on the Sophia research domain for peer-reviewed dermatology evidence, ingredient safety research, and fashion-history knowledge, so Aglaea does not maintain its own research corpus. - **Database access layer** (`@aglaea/database`): Query builders, optimized access patterns, and caching strategies over the shared PostgreSQL schema. ## Grounding This feature document is scoped to the implemented `libs/aglaea/*` package surface — 93 libraries, all present in the monorepo. It captures recommendation, analysis, virtual try-on, product matching, trend, wardrobe, shopping, wellness-beauty, sustainability, ethical AI, and Sophia integration features. Type names, enum values, event constants, and the API surface trace to `@aglaea/core`, `@aglaea/ai-orchestrator`, `@aglaea/events`, `@aglaea/api-services`, `@aglaea/ethical-ai`, and `@aglaea/wardrobe-management` source; see `specifications.md` for the full contract detail. The industry-leading accuracy figures are SOTA targets from `libs/aglaea/README.md`, not measured production numbers. Aglaea consumes Freya product, brand, inventory, and provenance data where available, but Freya's supply-side luxury-goods operations remain documented in `DOMAINS/freya/features.md`.