Journal

Field notes from the people doing the work.

Engineering, marketing, and operations writing, practical, opinionated, and always anchored in real production experience.

field-journal / drafts

published

Engineering

Why your eval set is the most important code you’ll write this quarter.

8 min read · April 2026

Marketing

The ROAS chart that lies, and the one that doesn’t.

Local

Kolkata · what hiring senior engineers actually feels like.

Cadence

monthly · no drip funnels

Editor’s pick

AI10 min read

Featured journal

The guardrails an AI agent needs before it can act

An AI agent that answers can be wrong. One that acts can be wrong expensively. The seven guardrails to add, in order, and what each one costs.

TeleMatrix Global3 November 2026

Read articleLong read · 10 min read

The archive

Notes on the work, by the people doing it.

9 min read

RAG vs fine-tuning: retrieve the facts, tune the behaviour

For a company knowledge assistant, start with RAG so answers stay current and cited. Fine-tune only for behaviour your evals show prompts cannot fix.

TeleMatrix Global3 November 2026

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8 min read

How to stop an AI chatbot making up answers

Chatbot hallucinations have five separate causes, from no grounding to a prompt that rewards guessing. Find yours, apply its fix, and measure every release.

TeleMatrix Global3 November 2026

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5 min read

Your RAG pipeline is retrieving the wrong chunks

When a retrieval system returns confident nonsense, the embedding model is rarely the problem. Chunk boundaries usually are. Here is how we diagnose and fix it.

TeleMatrix Global14 August 2026

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