# Blue IT Systems

> AI engineering house based in Erlensee, Germany. We design, build and operate agents, retrieval systems and copilots for production use.

Contact: hello@it-blue.com. German edition: https://it-blue.de/

## What we do

- [https://it-blue.com/ai](https://it-blue.com/ai): Overview of our AI solutions
- [https://it-blue.com/ai/solutions](https://it-blue.com/ai/solutions): Ready-made solutions: Antlet.OS, ServiceNow agent, FounderOS
- [https://it-blue.com/ai/peers](https://it-blue.com/ai/peers): Peer agents and simulation
- [https://it-blue.com/ai/retrieval](https://it-blue.com/ai/retrieval): RAG, hybrid search and evaluation
- [https://it-blue.com/ai/use-cases](https://it-blue.com/ai/use-cases): Use cases with measurable outcomes
- [https://it-blue.com/ai/frameworks](https://it-blue.com/ai/frameworks): Frameworks and stack selection

## Engineering notes

- [https://it-blue.com/blog](https://it-blue.com/blog): Every article, since 2023
- [MCP and A2A — The Protocol Layer of the Agent Ecosystem](https://it-blue.com/blog/mcp-a2a-protocol-layer)
- [Three Years of Notes, One Sentence](https://it-blue.com/blog/constraints-belong-in-the-architecture)
- [Subagents vs. Peer Agents — Two Working Modes of Multi-Agent Systems](https://it-blue.com/blog/subagents-vs-peer-agents)
- [What Our Coding Agent Costs Per Accepted Change](https://it-blue.com/blog/what-our-coding-agent-costs)
- [Simulation-First Agent Engineering](https://it-blue.com/blog/simulation-first-agent-engineering)
- [The First Meeting Is Mostly About Expectations](https://it-blue.com/blog/the-first-meeting-is-about-expectations)
- [Eval-Driven Development for LLM Systems](https://it-blue.com/blog/eval-driven-llm-development)
- [One Terminal, Many People, One Memory](https://it-blue.com/blog/one-terminal-many-people)
- [Asking With Gloves On](https://it-blue.com/blog/asking-with-gloves-on)
- [GraphRAG — When Knowledge Graphs Pay Off](https://it-blue.com/blog/graphrag-when-knowledge-graphs-pay-off)
- [Retrieved Correctly, Quoted Faithfully, Still Wrong](https://it-blue.com/blog/retrieved-correctly-still-wrong)
- [Hybrid Retrieval Is the Production Baseline](https://it-blue.com/blog/hybrid-retrieval-production-baseline)
- [The Assistant That Agreed Too Easily](https://it-blue.com/blog/the-assistant-that-agreed-too-easily)
- [MCP at Enterprise Scale: Registry and Gateways](https://it-blue.com/blog/mcp-registry-enterprise-gateways)
- [When the User Changes Their Mind Halfway Through](https://it-blue.com/blog/when-the-user-changes-their-mind)
- [Vector store consolidation: the deployment model decides](https://it-blue.com/blog/vector-store-consolidation)
- [An Assistant in Front of the Queue Changes the Arithmetic](https://it-blue.com/blog/the-assistant-as-gatekeeper)
- [EU AI Act Article 50 Now Applies — What to Implement](https://it-blue.com/blog/eu-ai-act-article-50)
- [The Chunker Deserved Its Own Article Three Years Ago](https://it-blue.com/blog/the-chunker-deserves-its-own-article)
- [Work IQ: grounding agents in organizational context](https://it-blue.com/blog/work-iq-organizational-context)

## Legal

- [https://it-blue.com/imprint](https://it-blue.com/imprint): Imprint
- [https://it-blue.com/privacy](https://it-blue.com/privacy): Privacy policy