Query and analyze Turkish electricity market prices including MCP (PTF/Piyasa Takas Fiyatı), SMP (SMF/Sistem Marjinal Fiyatı), WAP (Ağırlıklı Ortalama Fiyat), and imbalance prices. Use when asking about electricity prices, market clearing prices, day-ahead prices, system marginal prices, weighted average prices, or price comparisons in Turkey's energy market. Triggers on: PTF, SMF, GÖP fiyat, GİP fiyat, elektrik fiyatı.

Create production-quality EPUB 3 ebooks from markdown and images with automated QA, formatting fixes, and validation. Use when creating ebooks, converting markdown to EPUB, or compiling chapters into a publishable book. Handles markdown quirks, generates TOC, adds covers, and validates output automatically.

Run EPUBCheck and Ace accessibility validation. Use before final EPUB packaging or distribution to ensure publication readiness.

Run and interpret visual QA pipeline for EPUB XHTML files. Use when user asks about layout, screenshots, visual issues, or rendering problems in REBRANDED_OUTPUT.

Expert in EqualizerAPO configuration file format, parsing, and generation. Use when implementing EAPO config import/export, adding support for new filter types, or debugging config file issues.

A production-grade algebraic equation solver with comprehensive security hardening to prevent template injection, command injection, and other code execution vulnerabilities.

Use when erlang's concurrency model including lightweight processes, message passing, process links and monitors, error handling patterns, selective receive, and building massively concurrent systems on the BEAM VM.

Complete guide for ERPNext/Frappe API integrations (v14/v15/v16) including REST API, RPC API, authentication, webhooks, and rate limiting. Use when code is needed for external API calls to ERPNext, designing API endpoints, configuring webhooks, implementing authentication (token/OAuth2/session). Triggers: API integration, REST endpoint, webhook, token authentication, OAuth, frappe.call, external connection, API response, rate limiting.

Intelligent agent for validating ERPNext/Frappe code against best practices and common pitfalls. Use when reviewing generated code, checking for errors before deployment, or validating code quality. Triggers: review this code, check my script, validate before deployment, is this correct, find bugs, check for errors, will this work.

Error handling patterns for ERPNext Document Controllers. Use when implementing try/except, validation errors, permission errors, and transaction management. Covers rollback patterns, error logging, and user feedback. V14/V15/V16 compatible. Triggers: controller error, try except catch, ValidationError, PermissionError, rollback, error handling.

Implementation workflows and decision trees for Frappe Document Controllers. Use when determining HOW to implement server-side DocType logic: lifecycle hooks, validation patterns, autoname, submittable workflows, controller override. Triggers: how do I implement controller, which hook to use, validate vs on_update, override controller, submittable document, autoname pattern, flags system.

Implementation workflows for building Frappe/ERPNext custom apps. Covers app structure, module creation, doctype design, fixtures, patches, and deployment. V14/V15/V16 compatible. Triggers: create custom app, new frappe app, bench new-app, app structure, module creation, doctype creation, fixtures, patches.

Implementation workflows and decision trees for Frappe hooks.py configuration. Use when determining HOW to implement doc_events, scheduler_events, override hooks, permission hooks, extend_bootinfo, fixtures, and asset includes. Covers V16 extend_doctype_class. Triggers: how do I hook, which hook to use, doc_events vs controller, override doctype, extend doctype class, permission hook, scheduler job, cron task, fixtures export.

Implementation workflows and decision trees for Jinja templates in ERPNext/Frappe. Use when determining HOW to implement Print Formats, Email Templates, Portal Pages, or custom Jinja methods. Covers template type selection, context variables, styling, and V16 Chrome PDF rendering. Triggers: create print format, email template, portal page, custom jinja filter, print format styling, pdf template, invoice template, report template.

Implementation workflows for Frappe scheduled tasks and background jobs (v14/v15/v16). Covers hooks.py scheduler_events, frappe.enqueue, queue selection, job deduplication, and error handling. Triggers: how to schedule task, background job, cron job, async processing, queue selection, job deduplication, scheduler implementation.

Complete guide for Frappe/ERPNext permission system - roles, user permissions, perm levels, data masking, and permission hooks

Deterministic syntax for Frappe Document Controllers (Python server-side). Use when Claude needs to generate code for DocType controllers, lifecycle hooks (validate, on_update, on_submit, etc.), document methods, controller override, submittable documents, or when questions concern controller structure, naming conventions, autoname patterns, UUID naming (v16), or the flags system. Triggers: document controller, controller hook, validate, on_update, on_submit, autoname, naming series, UUID naming, flags system.

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

Context-aware debugging that learns from past solutions. When an error occurs:

Use when user needs complex error pattern analysis, distributed system debugging, error correlation, root cause discovery, or predictive error prevention across microservices.

Advanced error analysis and pattern detection specialist for identifying, analyzing, and preventing software errors

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

error-learner

Effect distinguishes between two types of failures:

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Expert in error handling, Error Boundaries, Sentry integration, logging strategies, error recovery, user-friendly error UI, and debugging tools

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.

Use when encountering failures - assess severity, preserve evidence, execute rollback decision tree, and verify post-recovery state

Add Sentry v8 error tracking and performance monitoring to your project services. Use this skill when adding error handling, creating new controllers, instrumenting cron jobs, or tracking database performance. ALL ERRORS MUST BE CAPTURED TO SENTRY - no exceptions.

A guide to using ERT (Emacs Lisp Regression Testing) for testing Emacs Lisp code.

Use when stuck in circles and want to hand off to another agent (Codex CLI) with full context

Defining clear ownership models and escalation procedures to ensure incidents are handled by the right people at the right time.

Handle escalated support issues with structured triage, communication, and resolution processes

Clear escalation procedures and paths for incident response

Adapt escape room games for global markets (English, Korean, Japanese) with cultural considerations, efficient translation workflows, and language-agnostic design strategies. Handles multilingual template creation, cultural adaptation, and localization testing. Use when preparing games for international audiences or implementing multi-language support.

Run ESLint for JavaScript/TypeScript code quality and style enforcement. Use for static analysis and auto-fixing.

Use when eSLint configuration including config files, extends, plugins, and environment setup.

Use when custom ESLint rules and plugins including rule development, AST traversal, and publishing.

Setup consistent code quality and formatting with ESLint and Prettier.

This skill should be used when setting up code quality tooling with ESLint v9 flat config, Prettier formatting, Husky git hooks, lint-staged pre-commit checks, and GitHub Actions CI lint workflow. Apply when initializing linting, adding code formatting, configuring pre-commit hooks, setting up quality gates, or establishing lint CI checks for Next.js or React projects.

Use when eSLint built-in rules including rule configuration, severity levels, and disabling strategies.

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ESP32 Integrated Development Framework documentation. Covers I2S, GPIO, FreeRTOS, peripherals, and ESP32S3-specific APIs.

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)

Estimate implementation complexity for features and technical tasks

Estimation techniques including analogous, parametric, three-point, and expert judgment methods. Provides effort, cost, duration, and complexity estimates for projects, features, and tasks.