Deterministic syntax for building Frappe custom apps including app structure, pyproject.toml, modules, patches and fixtures

Deterministic syntax for Frappe hooks.py configuration. Use when Claude needs to configure app events, scheduler tasks, document events, fixtures, boot session, jenv customization, or website routing. Covers v14/v15/v16 including extend_doctype_class. Triggers: hooks.py, doc_events, scheduler_events, fixtures, app_include_js, override_whitelisted_methods.

Error Boundaries เป็นคุณลักษณะที่สำคัญใน React ที่ช่วยจัดการข้อผิดพลาด (Error Handling) ในแอปพลิเคชัน React โดยการจับ JavaScript errors ที่เกิดขึ้นใน component tree และแสดง fallback UI แทนที่จะทำให้ทั

error-code-guide

errors

Guides users on error conversion patterns, From trait implementations, and the ? operator. Activates when users need to convert between error types or handle multiple error types in a function.

Standard protocols for handling errors, API failures, and infrastructure issues

Errors are inevitable. The difference between a frustrating product and a caring one is how you handle them. This skill teaches you to design error states that guide users to resolution rather than le

Effect distinguishes between two types of failures:

Error Pattern Safety Guidelines for Agentic Engines

Error recovery and failure handling patterns for distributed systems including rollback strategies, circuit breakers, retry logic with exponential backoff, graceful degradation, and compensating transactions. Activates when task execution fails, timeouts occur, external services fail, database transactions fail, or cascade failure risks are detected. Use when recovering from failures, preventing data corruption, implementing resilience patterns, or handling partial system failures.

Clear escalation procedures and paths for incident response

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grep '"type"' packages/*/package.json

Create and configure ESPHome devices for DIY smart home sensors and actuators. Write YAML configurations for ESP8266/ESP32 boards, sensors, displays, and automations. Use when building custom IoT devices, flashing ESPHome firmware, or integrating with Home Assistant. (project)

Comprehensive guide for developing on EspoCRM - metadata-driven CRM with service layer architecture

Master Ethereum development including EVM, gas optimization, and client interactions

Expert guidelines for Ethereum smart contract development with Solidity, OpenZeppelin, and Hardhat

Use when need explicit quality criteria and scoring scales to evaluate work consistently, compare alternatives objectively, set acceptance thresholds, reduce subjective bias, or when user mentions rubric, scoring criteria, quality standards, evaluation framework, inter-rater reliability, or grade/assess work.

Event-driven architecture patterns with event sourcing, CQRS, and message-driven communication. Use when designing distributed systems, microservices communication, or systems requiring eventual consistency and scalability.

Add new events to Bob The Skull's event-driven architecture. Use when creating new events, event publishers, event handlers, or extending the event system with new event types.

为Flutter插件视图添加事件监听容器，自动管理事件订阅/取消订阅生命周期，避免内存泄漏并减少约84%的模板代码。适用场景：(1) 插件视图需要响应全局事件更新UI，(2) 需要避免手动管理订阅导致的内存泄漏，(3) 简化事件监听实现

JSONL event stream for external integrations and hooks

Event sourcing patterns and design decisions

Implement event sourcing and CQRS patterns using event stores, aggregates, and projections. Use when building audit trails, temporal queries, or systems requiring full history.

AWS EventBridge serverless event bus for event-driven architectures. Use when creating rules, configuring event patterns, setting up scheduled events, integrating with SaaS, or building cross-account event routing.

Requirements for creating and revising example sentences in je-dict-1. Covers minimum counts, progressive length, vocabulary restrictions by tier, and quality standards.

**Core Philosophy**: Semantic redesign, not mechanical conversion. Think like both a presentation designer (clarity, accessibility, simplicity) and an artist (creative visual expression, spatial desig

Hierarchical exception system with HTTP status codes, machine-readable error codes, and structured responses for consistent API error handling across all endpoints.

Guide for creating exceptions using fastapi-problem that are automatically converted to RFC 9457 Problem Details responses.

Use when implementing exchange rate functionality - provides complete patterns for fetching BTC/fiat exchange rates from Coinbase API, caching strategies, conversion utilities, and React hooks for displaying rates in UI

Deploy a Vibes app to exe.dev VM hosting. Uses nginx on persistent VMs with SSH automation. Supports client-side multi-tenancy via subdomain-based Fireproof database isolation.

executing-hms-runs

<user_command>/kata:quick-task</user_command>

Use when orchestrating sequential phases in plan execution - executes tasks one-by-one in main worktree using git-spice natural stacking (NO manual upstack commands, NO worktree creation, tasks build on each other)

Use when configuring Expo apps with app.json, app.config.js, and EAS configuration. Covers app metadata, plugins, build configuration, and environment variables.

Expo SDK configuration and setup. Use when configuring Expo projects.

Building Expo DevTools Plugins with CLI Interfaces for interacting with running Expo apps using agents.

Guide for using expo-glass-effect to create iOS native liquid glass UI effects. Apply when implementing glass effect UI components, cards, or surfaces on iOS.

Comprehensive instructions for building Expo apps using gluestack-ui.

Install and wire @tanstack/react-query in Expo/React Native apps (providers, query client, fetch patterns, and screen usage). Use when adding React Query to a project or extending data fetching patterns.

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Comprehensive Expo expert with access to complete official documentation covering React Native development, EAS Build, EAS Submit, EAS Update, Expo Router, Expo Modules API, configuration, deployment, and all platform features. Invoke when user mentions Expo, React Native, EAS, Expo Router, mobile app development, iOS/Android development, or cross-platform development.

Express.js API development, route handling, middleware, error handling, request validation, CORS. Use when building Express routes, implementing middleware, handling API requests, or setting up the backend server.

Complete guide for building scalable microservices with Express.js including middleware patterns, routing strategies, error handling, production architecture, and deployment best practices

Expert in identifying and remedying procedural errors including jurisdictional defects (ultra vires, improper authority, invalid purpose, bad faith), procedural defects (defective notice, insufficient inquiry, missed registration, form errors), consequences and remedies (void vs. voidable, cure strategies, limitation periods), and case law on procedural challenges. Use when analyzing procedural compliance or defending challenges. Key terms include void expropriation, voidable expropriation, ultra vires, defective notice, cure strategies, limitation periods

Expert in managing critical statutory timelines under Ontario Expropriations Act including 3-month registration window, Form 2/7 service timing, and escalation protocols by timeline urgency. Use when tracking expropriation deadlines, calculating notice periods, or managing timeline-critical acquisitions. Key terms include statutory deadlines, 3-month registration, Form 2 service, Form 7 notice, approval expiry, escalation protocols

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Extended thinking (ultrathink) configuration for Claude API. Activate for complex reasoning tasks, deep analysis, multi-step problem solving, and tasks requiring careful deliberation. Enables Claude's internal reasoning with configurable thinking budgets.