Author

Patrick Waweru

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

5 articles

Architecture10 min read

When ten thousand people ask the same question at once

A cache answers questions it has seen before. During an incident it has seen none of them, and every request misses at the same moment. How to do the work once instead of four thousand times.

Oct 8, 2026 Read article

Architecture11 min read

Fast AI products do the work before you ask

You can't make a language model think faster. You can stop it thinking while somebody waits. The precomputation trick behind every AI product that feels instant, in plain English.

Sep 29, 2026 Read article

Protocols12 min read

The agent protocols are standardised. Your authorization isn't.

A2A now sits beside MCP at the Agentic AI Foundation, and both leave authorization to you. Delegation versus impersonation, token exchange at every hop, and the RFC 8693 rule that decides where chain policy has to live.

Sep 12, 2026 Read article

AI Engineering10 min read

What an AI agent actually costs — and how to cap it

Token spend is the line item nobody scopes until the bill arrives. How we meter every agent server-side, budget it per agent, and stop runaway spend with a daily kill-switch.

Aug 15, 2026 Read article

Protocols11 min read

A2A in production - tasks, push, and security beyond the demo

The A2A features a hello-world skips but a real multi-agent system can't: push notifications, resubscription, security schemes on the agent card, and typed extensions.

Jul 15, 2026 Read article