marketplace-personalisation
Marketplace Engineering Two-Sided Personalisation Best Practices
Comprehensive guide for designing, building and improving personalisation and recommendation systems in two-sided trust marketplaces on AWS Personalize. Contains 49 rules across 9 categories, ordered by cascade impact on the personalisation lifecycle, plus two playbooks for planning a new system from scratch and diagnosing an existing one.
When to Apply
Reference this skill when:
- Designing the event schema and tracking for a new recommender system
- Choosing an AWS Personalize recipe (USER_PERSONALIZATION_v2, SIMS, PERSONALIZED_RANKING_v2)
- Writing or reviewing candidate-generation and re-ranking code for marketplace search or homefeed
- Handling cold start for new providers, new seekers, or new catalog regions
- Diagnosing a live system that "mostly works but feels stale, unfair, or unpersonalised"
- Planning the next experiment, baseline comparison, or A/B test for the recommender
- Investigating concentration, coverage collapse, death spirals, or training-serving skew
- Adding observability dashboards, drift detection, or online metric slicing
More from pproenca/dot-skills
zod
Zod schema validation best practices for type safety, parsing, and error handling. This skill should be used when defining z.object schemas, using z.string validations, safeParse, or z.infer. This skill does NOT cover React Hook Form integration patterns (use react-hook-form skill) or OpenAPI client generation (use orval skill).
2.4Kclean-architecture
Clean Architecture principles and best practices from Robert C. Martin's book. This skill should be used when designing software systems, reviewing code structure, or refactoring applications to achieve better separation of concerns. Triggers on tasks involving layers, boundaries, dependency direction, entities, use cases, or system architecture.
1.4Kemilkowal-animations
Emil Kowalski's animation best practices for web interfaces. Use when writing, reviewing, or implementing animations in React, CSS, or Framer Motion. Triggers on tasks involving transitions, easing, gestures, toasts, drawers, or motion.
967vitest
Vitest testing framework patterns for test setup, async testing, mocking with vi.*, snapshots, and test performance (formerly test-vitest). This skill should be used when writing or debugging Vitest tests. This skill does NOT cover TDD methodology (use test-tdd skill), API mocking with MSW (use test-msw skill), or Jest-specific APIs.
930react-hook-form
React Hook Form performance optimization for client-side form validation using useForm, useWatch, useController, and useFieldArray. This skill should be used when building client-side controlled forms with React Hook Form library. This skill does NOT cover React 19 Server Actions, useActionState, or server-side form handling (use react-19 skill for those).
890typescript
This skill should be used when the user asks to "optimize TypeScript performance", "speed up tsc compilation", "configure tsconfig.json", "fix type errors", "improve async patterns", or encounters TS errors (TS2322, TS2339, "is not assignable to"). Also triggers on .ts, .tsx, .d.ts file work involving type definitions, module organization, or memory management. Does NOT cover TypeScript basics, framework-specific patterns, or testing.
850