Concept

Observability

Observability is the practice of designing systems so operators can ask useful questions about behavior after the system is running.

Observability is not the same as having many dashboards. A useful observable system lets engineers connect symptoms to causes under pressure.

Where This Connects

Concept

Fault Tolerance

Fault tolerance is the engineering discipline of designing for partial failure instead of assuming perfect components.

Technology

Containers

A container packages an application process with its filesystem and runtime assumptions while sharing the host kernel.

Mental Model

Feedback Loops

A model for seeing how systems observe state, react, and sometimes amplify the conditions they are trying to correct.

Control systemsSoftware operationsOrganizationsMarkets

Deep Dive

Why Distributed Systems Fail in Unexpected Ways

An investigation into cascading failures, partial failure, retry storms, and the second-order behavior of distributed systems.

Aug 24, 2026 · 2 min read · intermediate

Deep Dive

Evaluating AI Systems as Engineering Instruments

A practical investigation into treating AI evaluation as measurement, not as a ceremonial checklist.

Aug 24, 2026 · 2 min read · intermediate

Teardown

How Queue Backpressure Works

A deconstruction of queues as shock absorbers, pressure signals, and hidden failure surfaces in distributed systems.

Aug 24, 2026 · 1 min read · intermediate

Build Log

Building a Small Observability Lab

A build log for a local service playground designed to make latency, retries, and queue depth visible.

Aug 24, 2026 · 1 min read · beginner

Post-Mortem

Post-Mortem: The Retry Storm That Looked Like a Capacity Problem

A failure analysis of a dependency outage where well-intended retry logic amplified load and delayed recovery.

Aug 24, 2026 · 1 min read · intermediate

Mental Model

Feedback Loops

A model for seeing how systems observe state, react, and sometimes amplify the conditions they are trying to correct.

Aug 24, 2026 · 1 min read

Field Note

Field Note: A Latency Budget Is a Design Constraint

A short observation on why latency budgets make distributed design conversations more concrete.

Aug 24, 2026 · 1 min read · beginner

Investigation

Investigation: What Should an AI Evaluation Actually Measure?

An open investigation into useful evaluation signals for AI systems that operate inside real products.

Aug 24, 2026 · 1 min read · intermediate

Learning Path

Foundations of Systems Thinking

A route through concepts, mental models, and articles for reasoning about complex software and infrastructure systems.

Aug 24, 2026 · 1 min read · beginner

Knowledge Entry

Containers

A deployment technology for packaging processes with their runtime dependencies and isolation boundaries.

Aug 24, 2026 · 1 min read

Knowledge Entry

Fault Tolerance

The ability of a system to continue providing useful behavior when parts of it fail.

Aug 24, 2026 · 1 min read

Knowledge Entry

Kubernetes

A control plane for scheduling, reconciling, and operating containerized workloads.

Aug 24, 2026 · 1 min read

A Path Through This Area

articleWhy Distributed Systems Fail in Unexpected Ways

articleEvaluating AI Systems as Engineering Instruments

articleHow Queue Backpressure Works

articleBuilding a Small Observability Lab