PromptStaging is a free suite of AI prompt tools that runs 100% in your browser. There is no backend and no signup: everything you type stays in your device's memory, which makes it safe to use with real client work, drafts and internal documents. The suite includes a Prompt Generator that builds structured, production-grade prompts (including per-profession generators for real estate, HR, marketing, legal, accounting and support work), a Skill Builder that creates and converts Agent Skills (SKILL.md) across Claude Code, Cursor, Codex, Windsurf and other agents, an MCP Configuration Studio for Claude Desktop and Cursor, a Quality Check Builder for verifying AI output before you ship it, and an AI Cost & Token Calculator covering current GPT, Claude and Gemini pricing. Alongside the tools, PromptStaging publishes in-depth guides on prompt chaining, context drift, token optimization and AI output verification — every tool is tested against current models, including GPT-6.1, Claude Sonnet 5.5 and Gemini 4 Argon. PromptStaging is built and maintained by a solo developer and is free for everyone, forever.