feat: word follow up chat with jAI✨

[babblebey]

Description

This pull request introduces the new jAI Follow-up Chat feature to the jargons.dev ecosystem, enabling users to ask context-aware questions about dictionary terms and receive intelligent, conversational AI responses. The changes span documentation updates, codebase structure, and a major new React component implementing the chat widget.

Feature Addition: Interactive Follow-up Chat

• Adds a complete React implementation for the jAI Follow-up Chat widget, including authentication, streaming AI responses, default question templates, and a trigger button for user interaction.

Documentation and API Updates

• Updates the README.md to describe the new follow-up chat feature, its conversational capabilities, and context-aware Q&A, replacing previous generic explanations.
• Documents the new components/follow-up-chat.jsx file and its main components in the module structure section.
• Expands documentation for prompt templates, clarifying the distinction between FOLLOW_UP_CHAT (for conversational Q&A) and SEARCH_WORD (for dictionary definitions).
• Details the new API endpoint src/pages/api/jai/follow-up-chat.js, including semantic search, conversation history, streaming responses, and CORS support.
• Provides a feature breakdown for the new chat widget, including UI elements, authentication, streaming, and integration points.

Related Issue

Fixes jargonsdev/roadmap#6

Screenshots/Screencasts

screen-capture.18.webm

Notes to Reviewer

• Relies on already established apps/jai module
• Added new node packaages
  • @ai-sdk/react
  • js-cookies

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Preview	Comments	Updated (UTC)
jargons-dev	Ready	Preview	Comment	Oct 19, 2025 1:51pm

💡 Enable Vercel Agent with $100 free credit for automated AI reviews

[Copilot]

Pull Request Overview

This PR introduces an interactive jAI Follow-up Chat feature that enables users to ask context-aware questions about dictionary terms through an AI-powered chat interface. Users can engage in real-time conversations with jAI, receiving intelligent explanations grounded in the dictionary content.

Key Changes:

• Adds a new React-based chat widget component with authentication, streaming AI responses, and default question templates
• Implements a new API endpoint (/api/jai/follow-up-chat) for handling conversational AI requests with semantic search and streaming support
• Updates authentication flow to support statically-rendered pages and handle OAuth redirects for the chat feature
• Refines jAI prompt templates to distinguish between conversational Q&A (FOLLOW_UP_CHAT) and dictionary definitions (SEARCH_WORD)

Reviewed Changes

Copilot reviewed 15 out of 18 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
src/pages/login.astro	Adds loading state UI and handling for OAuth authentication flow
src/pages/api/jai/follow-up-chat.js	New API endpoint for streaming conversational AI responses with CORS support
src/pages/api/github/oauth/callback.js	Updates OAuth callback to handle chat widget redirects with jai=1 parameter
src/pages/api/github/oauth/authenticate.js	New endpoint for validating GitHub OAuth tokens
src/lib/stores/jai.js	New store for managing jAI chat widget open/closed state
src/lib/stores/auth.js	New store for managing authentication loading state
src/layouts/word.astro	Integrates chat widget trigger and manages widget visibility with URL parameter handling
src/components/navbar.astro	Makes navbar sticky to improve UX when chat is open
src/components/islands/search.jsx	Updates responsive breakpoints and z-index for proper layering
src/components/islands/profile.jsx	Adds loading spinner to GitHub authentication button
src/base.css	Adds styles for chat widget animations and layout
package.json	Adds dependencies for AI SDK React and cookie management
apps/jai/lib/jai-prompts.js	Refactors prompts to distinguish chat vs. definition generation
apps/jai/components/follow-up-chat.jsx	New chat widget component with authentication, streaming, and templated questions
apps/jai/README.md	Updates documentation for the new follow-up chat feature

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}