> golang-error-handling
Standards for error wrapping, checking, and definition in Golang. Use when wrapping errors, defining sentinel errors, or handling errors idiomatically in Go. (triggers: **/*.go, error, fmt.errorf, errors.is, errors.as)
curl "https://skillshub.wtf/HoangNguyen0403/agent-skills-standard/golang-error-handling?format=md"Golang Error Handling Standards
Priority: P0 (CRITICAL)
Principles
- Errors are Values: Handle them like any other value.
- Handle Once: Log OR Return. Never Log AND Return (creates duplicate logs).
- Add Context: Don't just return
errbubble up. Wrap it with context:fmt.Errorf("failed to open file: %w", err). - Use Standard Lib: Go 1.13+
errorspackage (Is,As,Unwrap) is sufficient. Avoidpkg/errors(deprecated).
Guidelines
- Sentinel Errors: Expoted, fixed errors (
io.EOF,sql.ErrNoRows). Useerrors.Is(err, io.EOF). - Error Types: Structs implementing
error. Useerrors.As(err, &target). - Panic: Only for unrecoverable startup errors.
Anti-Patterns
- Check only not nil:
if err != nil { return err }-> Loses stack/context context. - String checking:
err.Error() == "foo"-> Brittle. - Swallowing errors:
_ = func()-> Dangerous.
References
> related_skills --same-repo
> typescript-tooling
Development tools, linting, and build config for TypeScript. Use when configuring ESLint, Prettier, Jest, Vitest, tsconfig, or any TS build tooling. (triggers: tsconfig.json, .eslintrc.*, jest.config.*, package.json, eslint, prettier, jest, vitest, build, compile, lint)
> typescript-security
Secure coding practices for TypeScript. Use when validating input, handling auth tokens, sanitizing data, or managing secrets and sensitive configuration. (triggers: **/*.ts, **/*.tsx, validate, sanitize, xss, injection, auth, password, secret, token)
> typescript-language
Modern TypeScript standards for type safety and maintainability. Use when working with types, interfaces, generics, enums, unions, or tsconfig settings. (triggers: **/*.ts, **/*.tsx, tsconfig.json, type, interface, generic, enum, union, intersection, readonly, const, namespace)
> typescript-best-practices
Idiomatic TypeScript patterns for clean, maintainable code. Use when writing or refactoring TypeScript classes, functions, modules, or async logic. (triggers: **/*.ts, **/*.tsx, class, function, module, import, export, async, promise)