Author

George Onyango

Articles by George Onyango, engineer at TechBridge — production notes on the agent systems, protocols and services we build and run.

4 articles

Protocols13 min read

The MCP spec's security rules that servers skip

The Model Context Protocol puts much of its security on implementers, in MUST and MUST NOT language a working server can ignore. Token audiences, owned state handles, SSRF, command allowlists and least scope, as a checklist.

Sep 15, 2026 Read article

Architecture11 min read

Why 95% of agent pilots die — and the boring engineering that ships the other 5%

The failure rate is real, and it is almost never the model. Five unglamorous engineering decisions separate the agents that reach production from the ones that die in the demo.

Aug 19, 2026 Read article

AI Engineering10 min read

Swapping the brain - building agents that aren't married to one model

The reasoning model is the most replaceable part of an agent. How we keep it swappable: a thin model boundary, an eval harness that measures agent work, and guardrails that don't move.

Jun 10, 2026 Read article

Protocols9 min read

Introduction to MCP - the Model Context Protocol

How MCP turns "LLM with tools" from bespoke glue code into a stable, language-agnostic contract you can build a platform on.

Mar 25, 2026 Read article