jellyfin

Investigates JetBrains IntelliJ Platform theme properties by searching source code. Use when user asks about UI theming, icon colors, tab spacing, component styling, or needs to find what properties are themeable vs hardcoded in IntelliJ-based IDEs.

Use when building Android UIs with Jetpack Compose, managing state with remember/mutableStateOf, or implementing declarative UI patterns.

Use Jina AI APIs for converting URLs to LLM-friendly Markdown (Reader) and searching the web (Search).

Manage Jira Agile boards and sprints. Use when listing boards, creating sprints, or moving issues to/from sprints.

Organize and manage Jira boards, issues, and sprints. Use when the user wants to: (1) List, create, update, or transition Jira issues, (2) View or manage sprints, (3) Assign issues or change status, (4) Query issues with JQL, (5) Manage Jira boards. Requires environment variables JIRA_URL, JIRA_USERNAME, JIRA_API_TOKEN, and optionally JIRA_PROJECTS_FILTER.

jira-builders

Interact with Jira from the command line to create, list, view, edit, and transition issues, manage sprints and epics, and perform common Jira workflows. Use when the user asks about Jira tasks, tickets, issues, sprints, or needs to manage project work items.

Create, update, and manage Jira issues from natural language. Use when the user wants to log bugs, create tickets, update issue status, or manage their Jira backlog.

Look up a Jira issue by key. Shows summary, status, assignee, priority, and link.

Prepare a Jira task with technical enrichment, subtask creation, and work breakdown structure.

Manage Jira projects. Use when listing projects, getting project configuration, retrieving issue types, or managing components and versions.

Creates well-structured JIRA tickets in the HYPERFLEET project with required fields including What/Why/Acceptance Criteria, story points, and activity type. Activates when users ask to create a ticket, story, task, or epic.

Look up Jira ticket details including summary, type, and description. Use this to fetch ticket context for branch naming, PR creation, or understanding requirements.

Merges two separate Jujutsu (jj) repositories into one. Use when combining repos, rebasing one repo onto another, or recovering from diverged histories.

Structured TODO commit workflow using JJ (Jujutsu). Use to plan tasks as empty commits with [task:*] flags, track progress through status transitions, manage parallel task DAGs with dependency checking. Enforces completion discipline. Enables to divide work between Planners and Workers. **Requires the working-with-jj skill**

Jujutsu is a next-generation version control system that uses Git repositories as storage while providing a fundamentally different and more powerful user experience. This skill includes the complete

Jujutsu (jj) is a Git-compatible distributed version control system with a fundamentally better mental model. It treats the working copy as a commit, distinguishes changes from revisions, and provides

Enables JMAP email operations using Node.js and jmap-jam library. Use when working with JMAP email servers, FastMail, Cyrus IMAP, Stalwart Mail Server, or when user mentions email search, reading, sending, or mailbox management.

JMicron Technology MPN encoding patterns, series identification, and handler guidance. Use when working with storage controller ICs or JMicronHandler.

Эксперт по job descriptions. Используй для создания вакансий, требований и EVP.

Analyze fit between job requirements and background using lexicons - identifies gaps, develops reframing strategies, creates cover letter plan

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JOIN.com Bewerbungsmanagement - neue Bewerbungen anzeigen, Gehaltsvorstellungen prüfen, PDFs automatisch zu Google Drive hochladen. Use when user asks about applications, candidates, job applications, Bewerbungen, or JOIN.

Jotai atomic state management patterns. Use when implementing fine-grained reactive state.

Implement reactive state management with Jotai atoms in Electron renderer. Use when creating atoms, implementing real-time updates via IPC, or setting up hybrid stream + HTTP fallback patterns. Covers event subscription optimization, debouncing, and Suspense integration.

Use when working with Jotai X stores (createAtomStore), accessing state in components or callbacks, persisting state to cookies or localStorage

Manages React state with Jotai including atoms, derived atoms, async atoms, and utilities. Use when building React applications needing atomic state, bottom-up state management, or fine-grained updates.

Interact with the Journal API to manage projects, documents, tasks, and workspaces. Use when the user mentions journal, projects, documents, tasks, workspaces, task identifiers like JO-123, or needs to access Journal data.

Use when creating animations that evoke happiness, surprise, or delightful moments in the user experience.

Use when consuming jp-ui in an app: installation, CSS/theme setup, component selection, and token usage; guide Codex to the jp-ui docs and types for implementation details.

Deploy jpbailes.com to GCP Cloud Run or trigger Render failover

Comprehensive toolkit for building applications with JPYC (Japanese Yen Pegged Coin). Use this skill when developing with JPYC token, implementing payment features, integrating JPYC SDK, deploying JPYC contracts to Base Sepolia, or building DApps with JPYC. Supports both JPYC SDK v1 usage and direct Solidity smart contract development with Hardhat, ethers.js, viem, Next.js, and React.

Best practices for jQuery AJAX with JSON data handling including sending/receiving JSON, error handling, security (CSRF protection, XSS prevention), promise patterns, caching, and modern alternatives. Use when working with jQuery AJAX requests, implementing JSON APIs, troubleshooting AJAX issues, or migrating from jQuery to Fetch API.

Hoist RegExp creation outside render or memoize with useMemo(). Apply when using regular expressions in React components or frequently called functions.

Zero-dependency JavaScript utilities using native APIs and just-* micro-packages. Use when manipulating objects, arrays, strings, numbers, or functions. Scan tables for native solution first (backticks), fall back to just-* package only when needed. Prefer native over dependencies.

Use Set and Map for O(1) membership lookups instead of array.includes(). Apply when checking membership repeatedly or performing frequent lookups against a collection.

Use toSorted() instead of sort() to avoid mutating arrays. Apply when sorting arrays that are React props, state, or otherwise shared/referenced elsewhere.

name: json-rpc-expert

jsr release workflow for Deno projects. Use when publishing or releasing packages to JSR (JavaScript Registry) using Deno.

Use when defining a feature, writing a PRD, or scoping work - reframes requirements around the user's job instead of the feature or team that owns it. Use before design or development begins.

Gay.jl integration for deterministic color generation. SplitMix64 RNG, GF(3) trits, and SPI-compliant fingerprints in Julia.

This skill provides guidance for using the persistent Julia REPL via MCP tools. AgentREPL maintains a worker subprocess for code evaluation, eliminating the "Time to First X" (TTFX) startup penalty th

Complete Calibre library management - add/remove books, convert PDF to EPUB, metadata editing, library analysis, cleanup, and e-reader sync (Sony PRS-T1). Use for any ebook or Calibre operation.

Guide for creating CLAUDE.md files. Use when: user asks to create CLAUDE.md, document project, add project instructions, or mentions CLAUDE.md.

Core server management for Hostinger VPS srv759970 - SSH access, system status, maintenance tasks, and disk space reclamation. Use for any server operation, connection issues, or maintenance tasks.

Docker management for Hostinger VPS srv759970 - container operations, image optimization, WordPress Docker, troubleshooting. Use for any Docker operation, container issues, or image management.

Security management for Hostinger VPS srv759970 - Fail2ban, WordPress security audits (25+ checks, 0-100% scoring), infrastructure audit. Use for security hardening, IP bans, or security assessments.

Web infrastructure for Hostinger VPS - Nginx, SSL/Let's Encrypt, static site deployment (Slidev/Astro/Vite), reverse proxy, and 502/504 troubleshooting.

Install Gmail MCP for email operations. Use when user needs Gmail read/send capabilities.