Use.fo - AI Prompt Writer

Introduction to Use.fo - AI Prompt Writer

Use.fo is a browser extension designed to improve the quality and precision of prompts entered into large language model (LLM) chat interfaces. It addresses common challenges users face when crafting effective prompts—such as ambiguity, lack of structure, or misalignment with intended outcomes—by providing real-time, context-aware prompt refinement. The tool is intended for professionals, researchers, developers, educators, and content creators who regularly interact with AI assistants like ChatGPT, Gemini, Claude, Perplexity, and Grok, and seek consistent, high-quality outputs without iterative trial-and-error.

Unlike static prompt templates, Use.fo dynamically adapts to user input and conversational context. It integrates directly into web-based chat interfaces, requiring no switching between applications or manual copy-pasting. Its dual-mode architecture enables both deep intent analysis and rapid in-context editing, making it suitable for both exploratory ideation and time-sensitive tasks.

Key Takeaways

• Dual-mode operation: Deep Mode performs intent extraction and structured prompt generation with success criteria; Fast Mode delivers instant mid-conversation prompt polishing while preserving the user’s original voice.
• Built-in clarifying questions: Before rewriting, the tool asks targeted questions to resolve ambiguity and refine scope.
• Cross-platform compatibility: Works natively with major LLMs including ChatGPT, Gemini, Claude, Perplexity, and Grok.
• Prompt library with cloud sync: Users can save, organize, and access custom prompts via Google Drive synchronization.
• Universal text expansion: Supports shortcut-based insertion (e.g., /hello) in any text input field across websites and applications.
• No data retention beyond user-controlled sync: All prompt data remains under user ownership and control.
• One-click activation: Requires no configuration or setup after installation.

How Use.fo Works

Use.fo operates as a lightweight Chrome extension that activates within supported LLM chat interfaces. When a user begins typing a prompt, they may choose between two modes: Fast Mode initiates immediate refinement upon clicking the ✨ button, adjusting phrasing, clarity, and specificity while retaining the original tone and intent. Deep Mode first engages the user with contextual questions—such as clarifying goals, audience, format requirements, or constraints—then generates a fully structured prompt that includes explicit success criteria and reasoning guidance.

The underlying methodology applies principles from advanced prompt engineering—including intent analysis, constraint mapping, and multi-step reasoning scaffolding—to transform vague or incomplete inputs into production-ready prompts. All processing occurs client-side where possible, with optional cloud-synced storage limited to user-saved prompts via Google Drive. The extension also supports universal text shortcuts: typing a predefined command (e.g., /hello) in any text field triggers instant expansion of a saved prompt.

Core Benefits and Applications

Use.fo enhances productivity in scenarios requiring precise LLM interaction, such as drafting technical documentation, generating marketing copy, preparing research queries, creating educational materials, or debugging code explanations. Its ability to standardize prompt quality reduces cognitive load during extended AI-assisted workflows and improves reproducibility across team collaborations. Educators benefit from consistent prompt framing for student-facing AI tools; developers use it to generate reliable API documentation or test-case descriptions; and analysts apply it to formulate structured data-exploration queries. Because prompts are synced via Google Drive and accessible across devices, teams can maintain shared, version-controlled prompt libraries without relying on third-party platforms.