DeFi

Define shared domain types and API contracts for F# full-stack applications. Use when: "define types", "create entity", "add model", "API contract", "shared types", "domain model", "record", "discriminated union", "data structure", "DTO", "interface", "type definition", "new entity", "modify types". Creates types in src/Shared/Domain.fs and API interfaces in src/Shared/Api.fs. Always start here when adding new features.

Provides comprehensive TypeScript development expertise and coding standards. Ensures type safety through strict type checking, implements clean code patterns, and maintains consistent architectural decisions. Specializes in advanced type system features including generics, conditional types, mapped types, and template literal types. Use when: working with TypeScript files (.ts/.tsx), defining type definitions and interfaces, implementing generic programming patterns, designing type-safe APIs, handling complex type transformations, integrating TypeScript with React/Vue/Angular frameworks, configuring strict mode settings, resolving type errors, or optimizing type performance in large codebases.

Create comprehensive Product Requirements Documents (PRDs), break down features into epics and user stories, and establish clear acceptance criteria. Use this skill when you need to: (1) Transform a project brief or business requirements into a structured PRD, (2) Define product scope and goals, (3) Create user stories with acceptance criteria, (4) Break down complex features into implementable epics, (5) Prioritize features and determine MVP scope, (6) Specify non-functional requirements, or (7) Translate business vision into development-ready specifications.

Domain model classes with automatic hydration, relations, and type casting. Use when creating models for API entities, defining relationships between models, casting properties to enums/dates, or creating value objects.

Create comprehensive Product Requirements Documents (PRD) from high-level product ideas with structured market analysis, feature definition, and success metrics for both greenfield and brownfield contexts. Use when defining product vision for new projects (greenfield) or formalizing requirements for existing systems (brownfield).

Extract operations from requirements as categorical morphisms. Identifiesdomain, codomain, effects, and whether morphisms are generators or derivedfrom composition. Use when: defining operations, adding functionality,analyzing behavior, specifying workflows.

Work with GNU recutils for plain-text record databases. Use when creating, querying, or validating .rec files, defining record schemas with %rec descriptors, converting between rec/CSV formats, or when the user mentions recutils, recsel, recins, recfmt, or record-oriented data files.

Use when writing PEG grammars with Peggy (formerly PEG.js) - parsing expression grammars, parser generation, and syntax definition

Build type-safe D1 databases with Drizzle ORM for Cloudflare Workers. Includes schema definition, migrations with Drizzle Kit, relations, and D1 batch API patterns. Prevents 12 errors including SQL BEGIN failures. Use when: defining D1 schemas, managing migrations, writing type-safe queries, implementing relations or prepared statements, using batch API for transactions, or troubleshooting D1_ERROR, BEGIN TRANSACTION, foreign keys, migration apply, or schema inference errors. Prevents 12 documented issues: D1 transaction errors (SQL BEGIN not supported), foreign key constraint failures during migrations, module import errors with Wrangler, D1 binding not found, migration apply failures, schema TypeScript inference errors, prepared statement caching issues, transaction rollback patterns, TypeScript strict mode errors, drizzle.config.ts not found, remote vs local database confusion, and wrangler.toml vs wrangler.jsonc mixing. Keywords: drizzle orm, drizzle d1, type-safe sql, drizzle schema, drizzle migrations, drizzle kit, orm cloudflare, d1 orm, drizzle typescript, drizzle relations, drizzle transactions, drizzle query builder, schema definition, prepared statements, drizzle batch, migration management, relational queries, drizzle joins, D1_ERROR, BEGIN TRANSACTION d1, foreign key constraint, migration failed, schema not found, d1 binding error

Interprets Arduino/ESP32/RP2040 compiler errors in plain English for beginners. Use when user shares error messages, compilation failures, upload problems, or asks "what does this error mean". Covers common errors like undefined references, type mismatches, missing libraries, and board-specific issues.

SRE patterns for production service reliability: SLOs, error budgets, postmortems, and incident response. Use when defining reliability targets, writing postmortems, implementing SLO alerting, or establishing on-call practices. NOT for initial service development (use scaffolding skills instead).

Create Zod schemas for new entities/resources in the backend. Use when adding a new resource, creating data models, defining DTOs (CreateType, UpdateType), or setting up validation schemas. Triggers on "new schema", "add entity", "create model", "define type".

Generate Effect Schema definitions for WoW DBC tables. Use when adding new game data tables or updating existing schemas.

Align certainty levels to evidence strength to avoid overconfidence or unwarranted hedging. Use when: (1) making definitive claims or recommendations that others will rely on, (2) when statements rest on inference or reasoning rather than verified facts, (3) before expressing confidence levels about version-specific behavior or current information, (4) when communicating risk, trade-offs, or reliability of conclusions

從規格目錄的 acceptance.yaml 生成/維護 BDD/ezSpec 測試。使用類似 Gherkin 語法，AI 自動產生 step definition（開發人員不需要手寫），驗收測試規格即為 Executable Specification。

Complete HUMMBL Base120 mental models framework with all 120 models across 6 transformations (Perspective, Inversion, Composition, Decomposition, Recursion, Meta-Systems). Includes model selection guidance, application methodology, and validation checklist. Version 1.0-beta definitive reference.

Navigate a local emacs-twist/twist.nix checkout and point to relevant files for questions about twist.nix configuration, flake outputs, library functions, Home Manager integration, package build flow, or tests. Use when a user asks where something is defined or how twist.nix is wired and the answer should reference code rather than reproduce it. Ask for the repo path if it is not available.

Designs high-performing team structures using organizational psychology AND creates new skills on-the-fly when team needs unmet expertise. Expert in team composition, personality balancing, collaboration ritual design, and skill creation for missing capabilities. Use for team design, role definition, skill gap identification. Activates on 'team building', 'team composition', 'skills needed', 'what skills'. NOT for general project management or solo work planning.

Use this skill when working with the CliftonSites Supabase backend for any task including understanding database schemas, debugging issues, adding features, querying data, managing RPC functions, reviewing triggers/policies, working with the automation pipeline, security architecture (MFA authentication, RLS, SECURITY DEFINER functions, API route protection), or any database operation. Provides complete expertise on all 12 tables, 25 RPC functions, 5 triggers, RLS policies, SECURITY DEFINER functions, admin MFA authentication, internal API token validation, views, indexes, data flows, and Supabase MCP server operations.

Execute the implementation plan by processing and executing all tasks defined in tasks.md