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Gabriel Anhaia

Senior Software Engineer @ Monta · 10+ years in backend, distributed systems & AI agents · Creator of Hermes IDE (AI-native terminal) & Neural Playground · Author of 2 books · Open-source enthusiast

Location Berlin, Germany Joined Joined on  Personal website https://xgabriel.com github website

Work

Software Engineer and Book Author

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Writing Debut
Five Year Club
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One Year Club
Your AI Is Retrieving Documents You Already Deleted
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Your AI Is Retrieving Documents You Already Deleted

#typescript #rag #node #postgres
2
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5 min read
Sub-Agents in TypeScript: When to Spawn One, When to Inline It
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Sub-Agents in TypeScript: When to Spawn One, When to Inline It

#typescript #agents #ai #node
2
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5 min read
When Your AI Returns Markdown and Your TypeScript App Expected JSON
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When Your AI Returns Markdown and Your TypeScript App Expected JSON

#typescript #ai #node #json
1
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5 min read
How to Know Your AI Agent Got Worse Before Your Users Tell You
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How to Know Your AI Agent Got Worse Before Your Users Tell You

#typescript #agents #ai #monitoring
1
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5 min read
Giving an AI Agent Database Access Without Giving It Your Database
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Giving an AI Agent Database Access Without Giving It Your Database

#typescript #agents #postgres #security
1
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5 min read
How to Tell Whether Your AI Actually Read the Document
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How to Tell Whether Your AI Actually Read the Document

#typescript #rag #ai #testing
1
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5 min read
Why the Same AI Request Costs 10 More Some Days (Seeing It in Node)
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Why the Same AI Request Costs 10 More Some Days (Seeing It in Node)

#node #typescript #ai #observability
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5 min read
AI Agents That Ask Before They Act: Approval Gates in TypeScript
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AI Agents That Ask Before They Act: Approval Gates in TypeScript

#typescript #agents #ai #node
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5 min read
Testing AI Agents in TypeScript Without Calling the Model
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Testing AI Agents in TypeScript Without Calling the Model

#typescript #testing #agents #vitest
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5 min read
AI Agent Incident Response: What to Capture Before It Scrolls Away
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AI Agent Incident Response: What to Capture Before It Scrolls Away

#typescript #agents #ai #node
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5 min read
AI Agent Tool Timeouts in Node: What the Model Should See When a Tool Hangs
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AI Agent Tool Timeouts in Node: What the Model Should See When a Tool Hangs

#typescript #node #agents #ai
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5 min read
Why Your AI Assistant Answers From the Wrong Document
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Why Your AI Assistant Answers From the Wrong Document

#typescript #rag #ai #node
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5 min read
The Unit Economics of an AI Agent Feature, Measured in TypeScript
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The Unit Economics of an AI Agent Feature, Measured in TypeScript

#typescript #agents #ai #node
2
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5 min read
Your AI Agent's Context Window Is Full — What Should It Forget?
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Your AI Agent's Context Window Is Full — What Should It Forget?

#typescript #agents #ai #node
1
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5 min read
Versioning Your System Prompt: The AI Config Change Nobody Logs
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Versioning Your System Prompt: The AI Config Change Nobody Logs

#typescript #ai #node #llm
1
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5 min read
Shipping an AI Agent Behind a Feature Flag Without Flying Blind
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Shipping an AI Agent Behind a Feature Flag Without Flying Blind

#typescript #agents #ai #node
1
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5 min read
The AI Agent Permission Model You Need Before Production
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The AI Agent Permission Model You Need Before Production

#typescript #agents #security #node
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5 min read
Your First AI Feature Will Break on Retries — the TypeScript Fix
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Your First AI Feature Will Break on Retries — the TypeScript Fix

#typescript #ai #node #reliability
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5 min read
Hybrid Search for AI Retrieval in Node: When Keywords Beat Embeddings
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Hybrid Search for AI Retrieval in Node: When Keywords Beat Embeddings

#typescript #rag #postgres #node
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5 min read
Resuming an AI Agent After a Deploy Killed It Mid-Task
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Resuming an AI Agent After a Deploy Killed It Mid-Task

#typescript #agents #node #langgraph
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5 min read
Making AI Output Reproducible in Node Tests: Seeds, Temperature, Top-P
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Making AI Output Reproducible in Node Tests: Seeds, Temperature, Top-P

#typescript #node #ai #testing
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5 min read
Time-Travel Debugging for AI Agents with LangGraph.js Checkpoints
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Time-Travel Debugging for AI Agents with LangGraph.js Checkpoints

#typescript #langgraph #agents #debugging
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5 min read
Your AI Agent Called the Same Tool 40 Times — Detecting Loops in TypeScript
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Your AI Agent Called the Same Tool 40 Times — Detecting Loops in TypeScript

#typescript #agents #ai #node
1
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5 min read
Rate Limiting AI Agent Endpoints in Node When One Request Costs €2
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Rate Limiting AI Agent Endpoints in Node When One Request Costs €2

#node #typescript #agents #ai
1
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5 min read
Multi-Tenant RAG in TypeScript: Keeping One Customer's AI Out of Another's Data
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Multi-Tenant RAG in TypeScript: Keeping One Customer's AI Out of Another's Data

#typescript #rag #security #postgres
1
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5 min read
Debugging a Stuck AI Agent: Reading Graph State in LangGraph.js
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Debugging a Stuck AI Agent: Reading Graph State in LangGraph.js

#typescript #langgraph #agents #debugging
1
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5 min read
Re-Indexing a Live RAG System Without Breaking Your AI Assistant
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Re-Indexing a Live RAG System Without Breaking Your AI Assistant

#typescript #rag #node #postgres
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5 min read
Red-Teaming Your Own AI Agent: A TypeScript Test Suite
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Red-Teaming Your Own AI Agent: A TypeScript Test Suite

#typescript #agents #security #ai
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5 min read
Multi-Turn AI Conversations in TypeScript: What to Keep, What to Drop
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Multi-Turn AI Conversations in TypeScript: What to Keep, What to Drop

#typescript #ai #node #llm
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5 min read
Streaming an AI Agent's Progress to the Browser in TypeScript
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Streaming an AI Agent's Progress to the Browser in TypeScript

#typescript #node #agents #streams
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5 min read
Deploying an AI Agent on Node.js: Timeouts, Streams, Cold Starts
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Deploying an AI Agent on Node.js: Timeouts, Streams, Cold Starts

#node #typescript #agents #deployment
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5 min read
Multi-Agent Teams in TypeScript: Supervisor, Workers, Who Owns State
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Multi-Agent Teams in TypeScript: Supervisor, Workers, Who Owns State

#typescript #langgraph #agents #ai
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5 min read
Tool Calling in TypeScript: Zod Schema to Working Function in 40 Lines
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Tool Calling in TypeScript: Zod Schema to Working Function in 40 Lines

#typescript #ai #node #zod
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5 min read
Ranking in TypeScript RAG: Why Cosine Similarity Alone Fails
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Ranking in TypeScript RAG: Why Cosine Similarity Alone Fails

#typescript #rag #ai #node
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5 min read
7 Prompt Mistakes That Only Show Up in Production TypeScript Apps
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7 Prompt Mistakes That Only Show Up in Production TypeScript Apps

#typescript #ai #node #prompts
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5 min read
Prompt-Injection Defense in a TypeScript Agent: 4 Layers That Compose
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Prompt-Injection Defense in a TypeScript Agent: 4 Layers That Compose

#typescript #security #ai #agents
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6 min read
Human-in-the-Loop with LangGraph.js: Pausing a Graph for Approval
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Human-in-the-Loop with LangGraph.js: Pausing a Graph for Approval

#typescript #langgraph #agents #ai
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5 min read
The Tool-Call Argument Your Model Gets Wrong — and the Validator That Catches It
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The Tool-Call Argument Your Model Gets Wrong — and the Validator That Catches It

#typescript #zod #ai #node
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5 min read
Embeddings in TypeScript: Batching, Rate Limits, and the Retry That Corrupts Your Index
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Embeddings in TypeScript: Batching, Rate Limits, and the Retry That Corrupts Your Index

#typescript #node #ai #rag
1
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5 min read
Your First LLM Call in TypeScript Is Untyped — Here's the Fix
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Your First LLM Call in TypeScript Is Untyped — Here's the Fix

#typescript #ai #node #zod
5
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6 min read
The Observability You Need Before Your First 1,000 AI Users
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The Observability You Need Before Your First 1,000 AI Users

#node #typescript #observability #ai
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5 min read
LangGraph.js vs a While Loop: When the Graph Earns Its Complexity
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LangGraph.js vs a While Loop: When the Graph Earns Its Complexity

#typescript #langgraph #agents #ai
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5 min read
Parallel Tool Calls in Node: Promise.all, Rate Limits, Partial Failure
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Parallel Tool Calls in Node: Promise.all, Rate Limits, Partial Failure

#typescript #node #ai #agents
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5 min read
Chunking Markdown in TypeScript: 5 Strategies and What Each Breaks
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Chunking Markdown in TypeScript: 5 Strategies and What Each Breaks

#typescript #rag #markdown #node
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6 min read
Type Every LLM Response with Zod and 4 Classes of Bug Disappear
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Type Every LLM Response with Zod and 4 Classes of Bug Disappear

#typescript #zod #ai #node
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5 min read
Your First Eval Suite in TypeScript (Vitest, Not a Notebook)
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Your First Eval Suite in TypeScript (Vitest, Not a Notebook)

#typescript #vitest #ai #testing
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5 min read
Checkpointing Multi-Step Agents in Node So a Crash Doesn't Cost You
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Checkpointing Multi-Step Agents in Node So a Crash Doesn't Cost You

#typescript #node #agents #ai
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5 min read
6 Tool-Design Mistakes That Make an LLM Call the Wrong Function
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6 Tool-Design Mistakes That Make an LLM Call the Wrong Function

#typescript #ai #node #agents
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6 min read
pgvector from Node.js: Indexes, Pools, and the Query That Times Out
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pgvector from Node.js: Indexes, Pools, and the Query That Times Out

#postgres #node #typescript #ai
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6 min read
Streaming LLM Responses in Node Without Breaking Backpressure
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Streaming LLM Responses in Node Without Breaking Backpressure

#node #typescript #streams #ai
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5 min read
Cost Ceilings in Node: Killing an Agent Loop Before It Kills the Budget
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Cost Ceilings in Node: Killing an Agent Loop Before It Kills the Budget

#typescript #node #agents #ai
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5 min read
Agent Memory in TypeScript: Short-Term, Long-Term, and What to Throw Away
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Agent Memory in TypeScript: Short-Term, Long-Term, and What to Throw Away

#typescript #ai #agents #node
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5 min read
Your First AI Agent in TypeScript Without a Framework
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Your First AI Agent in TypeScript Without a Framework

#typescript #ai #node #agents
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5 min read
Citations That Survive a TypeScript Refactor
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Citations That Survive a TypeScript Refactor

#typescript #rag #ai #node
5
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6 min read
JSON Mode vs Structured Output vs Zod Parsing: Which Guarantees Shape
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JSON Mode vs Structured Output vs Zod Parsing: Which Guarantees Shape

#typescript #zod #ai #node
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5 min read
Guardrails in TypeScript: Input Validation, Output Filters, Refusal Paths
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Guardrails in TypeScript: Input Validation, Output Filters, Refusal Paths

#typescript #node #ai #security
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5 min read
LangGraph.js in Practice: Nodes, Edges, and State That Actually Persists
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LangGraph.js in Practice: Nodes, Edges, and State That Actually Persists

#typescript #langgraph #ai #agents
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5 min read
Idempotent Tools in Node: Safe Retries When the Model Calls Twice
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Idempotent Tools in Node: Safe Retries When the Model Calls Twice

#typescript #node #ai #reliability
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6 min read
Caching Embeddings in Node: A 60-Line Layer That Cuts the Bill
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Caching Embeddings in Node: A 60-Line Layer That Cuts the Bill

#typescript #node #rag #ai
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5 min read
What One Token Actually Costs in a Node App (and 3 Lines That Show You)
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What One Token Actually Costs in a Node App (and 3 Lines That Show You)

#node #typescript #ai #observability
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5 min read
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