Docker operator

Build Docker images from a repository Dockerfile with context, ignore-file, tag, cache, and post-build verification checks. Use when the user asks to build or rebuild an image locally, fix a Docker build, or turn an application directory into a tagged image.

Answer Docker command questions with a compact, safety-aware reference for containers, images, Compose, storage, cleanup, and diagnostics. Use when the user asks what Docker command or flag to use, wants a quick Docker reference, or needs a command translated into plain language.

Measure Docker disk usage, identify unused containers, images, volumes, networks, and build cache, then remove only resources the user explicitly selects. Use when Docker storage is growing, the user asks to prune Docker, or cleanup candidates need a safety review.

Operate Docker Compose applications by locating the project file, validating configuration, inspecting services, viewing logs, and managing startup or shutdown safely. Use when the user mentions Compose, a compose.yaml file, a multi-container app, or service-level operations.

Perform common Docker container operations including run, list, inspect, logs, exec, start, stop, restart, and remove with evidence-first safety checks. Use when the user asks to operate an individual container or wants help understanding its state.

Inspect Docker installation, client and daemon health, active contexts, Compose availability, and local permissions without changing the environment. Use when Docker is not responding, the user asks whether Docker is installed or healthy, or a task needs a safe environment check first.

Manage Docker images with pull, list, inspect, history, tag, remove, and disk-usage workflows. Use when the user needs to find an image, compare tags, download an image, understand image layers, or remove reviewed image data.

Connect Docker to the systems around it, covering continuous integration builds with layer caching, image publishing to registries with short-lived credentials, Compose as a local development dependency stack, development containers, and the image contract an orchestrator such as ECS or Kubernetes depends on. Use when a pipeline must build or publish an image, when local services need to run alongside an application, or when an image must satisfy a deployment target's health, signal, and configuration expectations.

Handle Docker registry workflows for login, logout, pull, tag, and push while protecting credentials and verifying exact image destinations. Use when the user needs to move an image between a local Docker daemon and a registry.

Install Docker Engine or Docker Desktop and configure contexts, the Compose plugin, buildx builders, socket permissions, registry credential helpers, and daemon resource limits, then verify the client reaches the intended daemon. Use when Docker is not installed, when the daemon is unreachable on a new machine, when a context or builder must be created, or when the user asks how to get Docker working.

Diagnose Docker and Compose failures from reproducible evidence, covering daemon access, contexts, pulls, builds, container exits, health checks, ports, volumes, networks, and configuration. Use when the user reports a Docker error, a service will not start, or a container behaves unexpectedly.

Inspect and manage Docker named volumes and user-defined networks, including create, connect, disconnect, and remove workflows with checks for live containers and persistent data. Use when a Docker task concerns storage, service connectivity, or isolated project networks.