bretfisher/bretfisher-devops

Create, edit, and modernize Dockerfiles, .dockerignore, Docker Bake files, and Compose files using Bret Fisher's strongly opinionated modern Docker + BuildKit rules. Use this skill whenever the user asks about a Dockerfile, containerizing or "dockerizing" an app, base image choice, digest/SHA pinning of image tags, multi-stage builds, BuildKit, build caching or secrets, .dockerignore, docker-bake.hcl / docker buildx bake, hardened or distroless images (Chainguard, Docker Hardened Images / DHI), a compose.yaml / docker-compose file, or local dev environments with Compose — even for a small change to any of these files.

Audit the GitHub Actions workflows in this repo for security, speed, and correctness, and report findings with a proposed diff.

Create, edit, audit, and speed up GitHub Actions workflows using Bret Fisher's opinionated DevOps rules. Use it when the user asks to create a workflow or CI/CD pipeline, edit or add a job to an existing .github/workflows/* file (even a one-line change), review or harden a workflow for security, speed up slow CI, publish a container image from CI, automate releases, or mentions GHA, action pinning, or findings from gasa, zizmor, poutine, pinact, or actionlint, even if they don't say "GitHub Actions".

Kubernetes features that reached beta or GA in v1.35 to v1.37 (Dec 2025 to Aug 2026), newer than most models' training data. Use it whenever the user writes Kubernetes manifests or Helm templates, runs kubectl, configures the kubelet, scheduler, or API server, works with DRA, autoscaling, storage, or admission, or asks what a recent Kubernetes version can do, even without naming a version. Also use it to update or extend this skill.

Set up local development linting by picking the right linters for each file type a project uses, then recording them as required pre-commit checks in AGENTS.md / CLAUDE.md and a make lint target. Uses the super-linter project as the live source of truth for which linters are current and popular per language. Use this skill whenever the user wants to add, choose, configure, or standardize linters for local development; asks "what linter should I use for X"; wants the agent to lint files before committing; sets up AGENTS.md/CLAUDE.md linting rules; or mentions super-linter, linting setup, pre-commit linting, or keeping linters up to date. This is for LOCAL developer/agent linting, not for authoring CI workflows.