Ranjib Dey

Ranjib Dey - Systems in Practice

Engineering reliable systems, from production infrastructure and AI agents to open-source hardware, gardens, and field adventures.

Personal writing and public work. Views are my own.

Where to Start

SRE, production engineering, incidents, infrastructure, agent evals, context engineering, and observability.

reef-pi, physical computing, electronics, maintainable platforms, and documentation.

Gardening, overlanding, aviation, astronomy, and other real-world systems.

Personal knowledge systems, GenAI workflows, teaching, and reflective learning.

August 11, 2026 · 9 min read

A comparison between infrastructure testing and agent evaluation, focused on hidden state, behavioral contracts, and feedback loops.

August 2, 2026 · 9 min read

A field note on treating overlanding plans as operational reviews with explicit assumptions, risk budgets, and verification timing.

July 26, 2026 · 6 min read

How a personal LLM wiki can separate raw evidence, curated memory, context packs, privacy boundaries, and evaluation loops.

July 18, 2026 · 6 min read

A reliability note on why incident categories matter only when they change prioritization, learning, and operational follow-through.

July 10, 2026 · 6 min read

A close look at reef-pi's hardware abstraction layer as the line that turned a controller project into a small open-source platform.