AI Answers Hub
Real questions from developers and AI users, answered by combining official documentation with verified community solutions. 34 researched answers and growing daily.
Storing Decimal Values from SQL in a CSV File with Python
Learn how to store Decimal values from SQL in a CSV file using Python. Covers pandas read_sql_query with coerce_float=False, manual string conversion, and Streamlit download fixes.
n8n Microsoft Graph OAuth2 fails after admin consent: fixes
Fix the 'Need admin approval' error in n8n Microsoft Graph OAuth2 after admin consent. Covers user consent settings, Delegated vs Application permissions, scope configuration, and common pitfalls.
Using Member Functions of a Class as LangGraph Tools: Fixing the 'self' Error
Learn why decorating a bound instance method with @tool causes 'multiple values for argument self' in LangGraph, and how to fix it with a closure pattern that keeps class state accessible.
How to Fine-Tune Projection Layer in CLIP Model Using LoRA
Learn how to fine-tune the projection layers in CLIP using LoRA. Covers the incompatibility of OpenAI's nn.Parameter with PEFT, the solution using Hugging Face Transformers, step-by-step code, and common pitfalls.
Fix Poor Retrieval in On-Prem OCR + RAG Pipelines: Causes & Solutions
Learn why noisy OCR, naive chunking, and embeddings-only search cause poor retrieval in on-prem RAG pipelines, and how to fix each with a proven pipeline: cleanup, structure-based chunking, hybrid retrieval, and reranking.
LangChain Model Memory Not Working: Why Gemini Forgets Names and How to Fix It
LangChain MemorySaver works correctly with Gemini, but the model fails on direct recall prompts like "What's my name?" due to prompt interpretation. Rephrase questions conversationally or switch to Claude/Llama for consistent memory recall.
Cache updates in chatbot when adding new documents: two approaches
Learn two approaches to keep chatbot cache up to date after adding new documents: lazy invalidation with document count check and eager batch refresh. Includes full LangChain code implementation and performance guidance.
Function calling with Claude on Amazon Bedrock in .NET Core
Learn how to implement function calling (tool use) with Claude on Amazon Bedrock in .NET Core using the AWSSDK.BedrockRuntime package. Includes corrected code, step-by-step setup, and common pitfalls.
MCP Python SDK: How to Authorize a Client with Bearer Header over SSE
Learn how to add Bearer token authentication to an MCP Python SDK server over SSE transport. Covers FastAPI middleware, thread-safe ContextVar patterns, and client-side configuration for Claude Code.
How to put a base64 image in a ChatPromptTemplate in LangChain
Learn how to correctly pass a base64 encoded image to a ChatPromptTemplate in LangChain. Fix the common error with MessagesPlaceholder and use HumanMessage with image_url content blocks.
What is actually sent to the LLM when invoke is called on messages?
Learn what is actually sent to the LLM when invoke is called on messages, including tool_calls and tool_use blocks, and how to manage token usage with large tool call arguments.
Fix ValueError: agent_scratchpad should be a list of base messages in LangChain
Fix the ValueError: variable agent_scratchpad should be a list of base messages in LangChain by replacing MessagesPlaceholder with a string template. Two working solutions with full code examples.
Configure GitHub Copilot in VS Code to work with Azure OpenAI/Azure AI Foundry
Learn how to configure GitHub Copilot in VS Code to use Azure OpenAI or Azure AI Foundry models. Step-by-step instructions for settings.json, model selection, API key entry, and troubleshooting common errors like 'Resource not found' and temperature conflicts.
Fix Presidio with LangChain Experimental Not Detecting Polish Names
Learn why Presidio with LangChain Experimental fails to detect Polish names and how to fix it by configuring the NLP engine entity mapping. Includes step-by-step code for spaCy Polish models and a workaround for PresidioReversibleAnonymizer.
Fix 'undefined message' error when using interrupt and Command({ resume }) in LangGraph
Fix the 'Cannot read properties of undefined (reading message)' error in LangGraphJS when using interrupt and Command({ resume }). The solution involves adding a ToolMessage on rejection to keep the message history valid.
Disable MCP Servers by Default in New VS Code Workspaces
Learn how to disable MCP servers by default in new VS Code workspaces using the github.copilot.advanced.mcp.disabledServers setting. Step-by-step instructions, common pitfalls, and alternative approaches included.
Fix GitHub Copilot sign-in button not responding in VS Code after GHE.com login
Fix the unresponsive GitHub Copilot sign-in button in VS Code after accidentally signing in via a GHE.com instance. Remove the cached server URL from settings.json to restore the regular GitHub.com login option.
How to Automatically Approve GitHub Copilot Terminal Commands in VS Code
Learn how to automatically approve GitHub Copilot terminal commands in VS Code. This guide covers the lack of built-in auto-approval, the community-reported CLI workaround using gh copilot, security risks, and step-by-step setup instructions.
How to use Claude Code with an existing Anthropic API key
Use Claude Code with your existing Anthropic API key by configuring the apiKeyHelper setting. This guide covers multiple approaches including .env files, environment variables, and custom scripts, with troubleshooting for common errors.
How to Get LLMs to Accurately Infer Relative Days of the Week
Learn how to get LLMs to accurately infer relative days of the week by interpolating each date option with its explicit relative label, eliminating hallucinated day names.
Implement Custom LiteLlm for Google ADK with Tool Call Support
Learn how to implement a custom LiteLlm wrapper for Google ADK that supports tool calls by subclassing BaseLlm and properly propagating tool call data from your LLM endpoint.
How to Turn Off or Minimize Reasoning in GPT-5-Nano
Learn how to turn off or minimize reasoning in GPT-5-Nano using the reasoning parameter. Includes the correct dictionary format, code examples, and troubleshooting for empty responses.
How to Change GitHub Copilot Model in IntelliJ (2025 Guide)
Learn how to change the GitHub Copilot model in IntelliJ IDEA, including plugin updates, troubleshooting missing dropdowns, using nightly builds, and workarounds like the web interface or VS Code.
Why CausalLM labels equal input_ids in Llama_cookbook (no shift needed)
Learn why CausalLM labels in the Llama_cookbook equal input_ids instead of being shifted by one position. Understand the internal logit shift in Hugging Face models and how the ignore index masks prompt tokens.