Radar blog

Engineering

How Radar works under the hood - Kubernetes internals, informers, topology, and the engineering behind the product.

Read-Only Is Not a Safety Boundary
EngineeringJuly 28, 2026

Read-Only Is Not a Safety Boundary

Two sentences get said in every meeting where a team wires an AI agent into a cluster: it's read-only, and just use the service account. Both are wrong later.

Eyal Dulberg 11 min read
Radar MCP vs kubectl: A Kubernetes Agent Benchmark on 52 Faults
EngineeringJuly 20, 2026

Radar MCP vs kubectl: A Kubernetes Agent Benchmark on 52 Faults

We benchmarked Radar's Kubernetes MCP server against raw kubectl on 52 live-cluster faults. Radar improved diagnosis quality and cut tool calls by 76%.

Nadav Erell 7 min read
MCP for Kubernetes: Live Cluster Context for AI Tools
EngineeringJuly 10, 2026

MCP for Kubernetes: Live Cluster Context for AI Tools

Pointing an AI at raw kubectl works, badly. Radar's built-in MCP server gives Claude, Cursor, and friends a token-optimized, RBAC-aware view of your cluster.

Roy Libman 7 min read
Why Radar Cloud Doesn't Cache Your Cluster State
EngineeringJune 6, 2026

Why Radar Cloud Doesn't Cache Your Cluster State

Most multi-cluster dashboards copy your cluster state into a backend cache. Radar Cloud doesn't. Here's why the reverse-proxy model is the right call.

Eyal Dulberg 6 min read
Radar's In-Cluster Architecture: Outbound-Only, Scoped, Live by Default
EngineeringJune 4, 2026

Radar's In-Cluster Architecture: Outbound-Only, Scoped, Live by Default

How Radar's in-cluster install works: outbound-only TLS, read-only RBAC by default, ~32MB RSS. The five questions every platform team asks, answered.

Eyal Dulberg 10 min read
Five Questions You Can't Answer With kubectl
EngineeringMay 1, 2026

Five Questions You Can't Answer With kubectl

kubectl hands you one object at a time, as raw YAML. Here are five questions - relationships, isolation, image contents, history, posture - where that runs out of road.

Nadav Erell 9 min read
Cluster Audit: The 31 Checks That Catch What You Forgot
EngineeringApril 23, 2026

Cluster Audit: The 31 Checks That Catch What You Forgot

Most clusters fail the same checks. Radar's built-in audit runs 31 of them inline against your live state. Inspired by Polaris and the NSA / CISA hardening guide.

Eyal Dulberg 6 min read

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