The previous approach using useEnvVars() hook had a closure problem:
- envVars started as [] on first render
- buildEnvObject captured this empty array
- Even with function body, the transport memoized the old buildEnvObject
Solution: Read directly from localStorage inside the body function
- Bypasses React state entirely
- Gets fresh values on each request
- No closure issues
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
PROBLEM:
DefaultChatTransport body is cloned ONCE on mount, so env vars
were always empty {} even after localStorage loaded them.
SOLUTION:
Use a function for body instead of an object. AI SDK v6 calls
body() on each request, ensuring latest env vars are sent.
Changes:
- useChat.ts: body: { env } → body: () => ({ env: buildEnvObject() })
- buildEnvObject() is called fresh on each request
- Env vars now sent correctly to /api/chat
Credit: ChatGPT for identifying the exact AI SDK v6 pattern
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
- Update @ai-sdk/react to v3.0.0-beta.131 for compatibility with AI SDK v6
- Fix tool execute method calls with type assertions in API routes
- Update chat components to use UIMessage types from AI SDK
- Move body option into DefaultChatTransport constructor
- Remove deprecated onResponse option from useChat hook
- Remove unused isCoreTool type guard function
- Fix Button variant from 'primary' to 'default'
Resolves all TypeScript compilation errors and build passes successfully.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Left Sidebar:
- Create /api/tools endpoint to fetch tools from registry
- Update ToolsSidebar to fetch and display tools dynamically
- Add filter input for searching tools by name/description/category
- Fix interface to use packageName/exportName from search registry
Right Sidebar:
- Create SettingsSidebar with environment variable management
- Add localStorage persistence for env vars
- Implement password masking for values
- Export useEnvVars() hook for accessing env vars
Environment Variable Forwarding:
- Update useChat hook to read and forward env vars to API
- Update chat route to extract env vars from request body
- Update dynamic-tool-loader to accept and forward env vars
- Update Railway executor to inject env vars into Deno environment
- Complete chain: localStorage → client → chat → Railway → Deno.env
Bug Fixes:
- Fix undefined property errors in tool detail page
- Add optional chaining for npmDownloadsLastMonth and qualityScore
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Railway is deprecating Nixpacks, so switching to a standard Dockerfile
with the official Deno image. This provides a cleaner and more maintainable
deployment configuration.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Implements a complete dynamic tool loading system that allows the playground to discover and load tools from the TPMJS registry at runtime.
**Architecture:**
- Search tool package (@tpmjs/search-registry) - Searches registry for tools
- Search API endpoint (/api/tools/search) - Text-based search with scoring
- Pre-flight tool loading - Automatically searches and loads tools on every message
- Railway executor service (Deno) - Loads tools from esm.sh via HTTP imports
- Dynamic tool loader - Calls Railway to load and execute tools remotely
**Key Components:**
1. Railway Executor (apps/railway-executor/)
- Deno-based service that natively supports HTTP imports
- Endpoints: /load-and-describe, /execute-tool, /cache/stats, /cache/clear
- Deploys to Railway with deno run --allow-net --allow-env server.ts
2. Search Tool Package (packages/tools/search-registry/)
- AI SDK v6 tool for searching TPMJS registry
- Uses jsonSchema + inputSchema pattern
- Searches /api/tools/search endpoint
3. Search API (apps/web/src/app/api/tools/search/)
- Text-based search with composite scoring
- Scores: text relevance + quality boost + download boost
- Returns tool metadata with importUrl for dynamic loading
4. Dynamic Tool Loader (apps/playground/src/lib/dynamic-tool-loader.ts)
- Calls Railway service to load tools from esm.sh
- Creates tool wrappers that execute remotely
- Process-level module cache + per-conversation tracking
5. Pre-flight Loading (apps/playground/src/app/api/chat/route.ts)
- Automatically searches for tools on every user message
- Loads top 5 matching tools before agent processes request
- Merges with static tools for seamless experience
**Technical Decisions:**
- Deno over Node.js: Native HTTP import support without flags
- Remote execution: Tools run in Railway sandbox, not Vercel
- Pre-flight loading: Better UX than two-turn search pattern
- Text search: BM25 had dependency issues, simple scoring works well
**Environment Variables:**
- RAILWAY_SERVICE_URL: https://endearing-commitment-production.up.railway.app🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
- Create new Next.js app at apps/playground for testing TPMJS tools
- Implement AI SDK v6 patterns with DefaultChatTransport and UIMessage format
- Create template tool package at packages/tools/hello with hello-world and hello-name tools
- Use tool() and jsonSchema() helpers to avoid Zod 4 conversion issues with OpenAI
- Add static tool loading system with switch statement (Next.js/webpack compatible)
- Implement chat interface with tool call visualization showing inputs/outputs
- Support multi-step tool execution with stepCountIs(5)
- Stream responses with toUIMessageStreamResponse() for full tool support
- Add sidebar showing available tools (static list)
- Use parts-based message rendering for text and tool calls
- Integrate firecrawl-aisdk tools (scrape, crawl, search)
- Add theme toggle in header (defaults to light mode)
- Fix responsive layout with max-width for message bubbles
- Use biome-ignore comments for legitimate any types in tool loading
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
