Development

Pragmatic coding standards - concise, direct, no over-engineering, no unnecessary comments

Drive the full internationalization journey for a project — detect the stack, recommend a library, set up the chosen library, wrap existing strings, and optionally connect a translation platform. Use when the user asks to add or configure i18n, internationalization, localization, multi-language support, or translations — including when they explicitly mention LinguiJS, Lingui, next-intl, "wrap strings", "find hardcoded text", "make my app translatable", or "set up translations". Triggers on g...

SEO optimization with keyword analysis, readability assessment, technical validation, content quality. Use for search rankings, blog posts, content audits, or encountering keyword density, readability scores, meta tags, schema markup errors.

Python backend development expertise for FastAPI, security patterns, database operations, Upstash integrations, and code quality. Use when: (1) Building REST APIs with FastAPI, (2) Implementing JWT/OAuth2 authentication, (3) Setting up SQLAlchemy/async databases, (4) Integrating Redis/Upstash caching, (5) Refactoring AI-generated Python code (deslopification), (6) Designing API patterns, or (7) Optimizing backend performance.

Install and use the RunAPI CLI as the universal execution layer for RunAPI models. Use when the user asks to run any RunAPI model from an agent, inspect auth, install RunAPI on a local machine/server/CI, pass JSON request bodies, wait for tasks, or automate RunAPI workflows from the terminal.

Use this skill when you need external perspective for code analysis, architecture advice, debugging guidance, or when stuck on complex problems. Executes Codex CLI in read-only mode for rapid consultation and second opinion. Note that Codex analyzes and suggests improvements but does not implement changes.

Production-grade multi-tenant SaaS platform architecture with three-panel separation, zero-trust security, strict tenant isolation, and comprehensive audit trails. Use for designing multi-tenant systems, implementing tenant-scoped permissions, ensuring data isolation, and building scalable SaaS platforms.

Expert on SpecWeave framework structure, rules, and spec-driven development conventions. Use when learning SpecWeave best practices, understanding increment lifecycle, or configuring hooks. Covers source-of-truth discipline, tasks.md/spec.md formats, living docs sync, and file organization patterns.

Official Filesystem Model Context Protocol Server for local file operations.

Progressive disclosure pattern for MCP tools and skills. Use when tools aren't found or you need to discover available capabilities.

Expert in .faf (Foundational AI-context Format) files for persistent project context. Use when working with .faf files, project DNA, CLAUDE.md bi-sync, faf-cli commands, MCP server configuration, or AI-readiness scoring (0-100%). Updated for v2.8.0 Tool Visibility System.

Use this skill when developing or maintaining browser extension code in the `browser/` directory, including Chrome/Firefox/Edge compatibility, content scripts, background scripts, or i18n updates.

⚠️ **Status: Release Candidate - Monitoring for Stability** This skill is prepared but NOT published. Waiting for: - ⏸️ v1.0 stable release (currently RC v1.139.10 as of 2025-11-28) - ❌ GitHub #5734 resolved (memory leak with TanStack Form - OPEN, last updated Nov 20, 2025, related PR #1866) - ⏸️ Critical bugs stabilization period - ⏸️ Template/reference content creation **Current Package:** `@tanstack/react-start@1.139.10` (Nov 28, 2025) **DO NOT USE IN PRODUCTION YET** - RC status, active m...

Comprehensive biosignal processing toolkit for analyzing physiological data including ECG, EEG, EDA, RSP, PPG, EMG, and EOG signals. Use this skill when processing cardiovascular signals, brain activity, electrodermal responses, respiratory patterns, muscle activity, or eye movements. Applicable for heart rate variability analysis, event-related potentials, complexity measures, autonomic nervous system assessment, psychophysiology research, and multi-modal physiological signal integration.

Main application building orchestrator. Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents.

Main application building orchestrator. Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents.

Main application building orchestrator. Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents.

Main application building orchestrator. Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents.

Main application building orchestrator. Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents.

Main application building orchestrator. Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents.

Main application building orchestrator. Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents.

Main application building orchestrator. Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents.

Main application building orchestrator. Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents.

Main application building orchestrator. Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents.