Expert web accessibility (a11y): WCAG 2.2 AA, semantic HTML, ARIA, keyboard, and screen readers. Trigger keywords: accessibility, a11y, WCAG, ARIA, role, screen reader, keyboard navigation, focus, focus trap, contrast, alt text, semantic HTML, label, axe, tab order. Use to build accessible UI, audit/fix a11y issues, or add accessible behavior to widgets.
Expert API design for REST & GraphQL: resource modeling, status codes, versioning, pagination, idempotency, errors, and contracts. Trigger keywords: API design, REST, RESTful, GraphQL, OpenAPI, endpoint, status code, versioning, pagination, cursor, idempotency, rate limit, contract, schema. Use to design or review HTTP/GraphQL APIs and their contracts.
Expert Bash scripting: robust, safe, portable shell scripts. Trigger keywords: bash, shell script, sh, quoting, word splitting, set -euo pipefail, trap, IFS, getopts, mktemp, shellcheck, POSIX, CLI, automation. Use for writing/debugging shell scripts and automation, or fixing quoting, exit-code, and portability bugs.
Expert modern C++ (17/20/23): safe, performant code, RAII, move semantics, templates/concepts, and UB diagnosis. Trigger keywords: C++, C++17, C++20, C++23, smart pointer, unique_ptr, RAII, move semantics, rvalue, template, concept, STL, undefined behavior, constexpr, memory, dangling. Use for C++ implementation, optimization, generic programming, or UB/memory issues.
Expert systematic debugging and root-cause analysis. Trigger keywords: debug, bug, error, exception, crash, stack trace, reproduce, root cause, works on my machine, intermittent, heisenbug, regression, git bisect, race condition. Use to diagnose failures methodically, find the real cause, and stop guess-and-check fixing.
Expert Docker: Dockerfiles, multi-stage builds, image size/cache optimization, Compose, and container best practices. Trigger keywords: Docker, Dockerfile, container, image, multi-stage, layer cache, docker-compose, .dockerignore, entrypoint, distroless, non-root, healthcheck, build context. Use for writing/optimizing Dockerfiles, shrinking images, faster builds, or Compose setup.
Expert Git & GitHub: workflows, history recovery, pull requests, branch protection, and Actions CI/CD. Trigger keywords: git, GitHub, merge conflict, rebase, cherry-pick, reflog, bisect, force push, pull request, branch protection, GitHub Actions, CI/CD, release, conventional commits. Use for Git troubleshooting, collaboration/automation setup, or recovering lost work.
Expert idiomatic Go: concurrency, interfaces, error handling, and the standard library. Trigger keywords: Go, golang, goroutine, channel, context, select, interface, error wrapping, errors.Is, defer, sync, Mutex, WaitGroup, errgroup, race, pprof. Use for writing/refactoring Go, designing concurrency, or fixing races, leaks, and deadlocks.