golang

# Go Opinionated, idiomatic Go for AI coding agents - the rules that change what code you write. SKILL.md is the dispatcher: apply the always-on rules below, then open **exactly one** reference file for the task at hand. Distilled guidance, not exhaustive docs; when an API signature matters, verify against the current stdlib/library docs. ## When to open which reference | Task involves… | Open | | --- | --- | | Writing/reviewing code, formatting, naming, doc comments, structs, interfaces, generics, design patterns (functional options, constructors), choosing a data structure | [references/style-and-naming.md](references/style-and-naming.md) | | Creating/wrapping/inspecting errors, nil/panic pitfalls, defensive copying, numeric conversions, injection/crypto/secrets security | [references/errors-and-safety.md](references/errors-and-safety.md) | | Goroutines, channels, select, sync primitives, errgroup, context propagation, cancellation, profiling, pprof, benchmarks, optimization, debugging leaks/races | [references/concurrency-and-performance.md](references/concurrency-and-performance.md) | | Writing tests, table tests, testify, mocks, fuzzing, coverage, golangci-lint config, modernizing to new Go idioms, GitHub Actions CI | [references/testing-and-ci.md](references/testing-and-ci.md) | | New project layout, `cmd/`/`internal/`/`pkg/`, go.mod dependency management, DI, CLI (cobra/viper), database access (sqlx/pgx) | [references/project-layout-and-deps.md](references/project-l...