Go programming language skill for writing idiomatic Go code, code review, error handling, testing, concurrency, security, and program design. Use when writing, reviewing, debugging, or asking about Go code — even if the user doesn't explicitly mention 'Go best practices'. Also use when: reviewing Go PRs, debugging Go tests, fixing Go errors, designing Go APIs, implementing security-sensitive code, handling user input, authentication, sessions, cryptography, building resource-oriented gRPC APIs with Google AIP standards, configuring golangci-lint, setting up structured logging with slog, or any question about Go idioms and patterns. Covers table-driven tests, error wrapping, goroutine patterns, interface design, generics, iterators, stdlib patterns up to Go 1.26, OWASP security practices, and Google AIP (API Improvement Proposals) with einride/aip-go for pagination, filtering, ordering, field masks, and resource names.
Detect and fix Go error handling antipatterns across a codebase. Use when auditing error handling, fixing double-handled errors, removing log-and-return patterns, cleaning up log-and-wrap helpers, or when the user asks to analyze error handling hygiene, find error handling violations, or ensure errors are handled exactly once. Covers detection patterns, classification of true vs false positives, fix strategies for interior vs boundary code, and verification steps.
TDD with baby steps for Go. Use when writing tests, doing TDD, practicing red-green-refactor, or when test cycles feel too large and risky. Also use when the user asks about incremental test development, test-first workflow, or wants help breaking a feature into small testable steps. Covers table-driven tests, testify, t.Run subtests, t.Helper, transformation priority premise, and incremental test progression.