개발 스킬

Organize Go projects with directory layouts, naming rules, and configuration files suited to their size and purpose. Supports command-line tools, libraries, services, and workspaces for developing several related modules together.

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• Starting a Go project with an appropriate directory layout
• Separating internal code from reusable packages
• Developing related modules in a shared workspace

Build Go services with uber-go/fx by connecting components and managing startup and shutdown. This skill covers dependency injection, which supplies components with what they need, plus reusable modules, signal handling, logging, and tests with substitute dependencies.

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• Connect components in a Go service with fx
• Manage server startup and graceful shutdown
• Organize application features into reusable modules

Write, review, and debug Go database access code with guidance on parameterized queries, transactions, connection pools, and tests. Covers database/sql, sqlx, and pgx, while leaving schema creation and migration SQL outside its scope.

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• Implement database queries and updates in Go
• Review SQL injection risks and connection leaks
• Review transaction boundaries and locking

Choose and use Go data structures based on access patterns, memory use, and copying behavior. It covers slices, maps, arrays, standard containers, string building, generic collections, and pointer types, with guidance on allocation and shared data.

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• Choose between slices, maps, arrays, and standard containers
• Plan capacity allocation for slices and maps
• Review which data remains shared after copying

Design how Go requests carry cancellation signals, time limits, and request metadata through application layers. Helps investigate work that continues after cancellation, choose suitable context types, and separate background tasks from the request lifecycle.

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• Reviewing context propagation from HTTP handlers to database calls
• Investigating missing cancellation and lingering timers
• Keeping background work running after a request ends

Choose and review Go design patterns for APIs and application structure. Get guidance on constructors, explicit initialization, resource cleanup, graceful shutdown, timeouts, and retries, with patterns matched to project requirements and the developer’s preferred architecture.

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• Design constructor APIs and configuration options
• Review implicit initialization and global state
• Plan resource cleanup and graceful shutdown

Build Go pipelines with samber/ro for events that arrive over time. Choose how consumers share data, combine multiple sources, and handle retries, timeouts, errors, and cancellation while managing the resources used by ongoing streams.

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• Process ongoing WebSocket events
• Combine data from multiple asynchronous sources
• Share one event source across multiple consumers

Implement layered configuration in Go with spf13/viper, combining command flags, environment variables, and configuration files under a fixed priority order. Covers mapping values into structs, reloading changed files, and keeping configuration state separate across tests.

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• Combining configuration files, environment variables, and command flags
• Mapping nested settings into Go structs
• Reloading configuration after file changes

Use samber/mo in Go to represent missing values, failures, and alternative value types explicitly. Learn to choose Option, Result, or Either and combine processing steps, including pipelines where each step changes the value's type.

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• Representing optional JSON and database fields
• Combining operations that may fail
• Choosing types for valid alternatives

Build and extend Go command-line tools with spf13/cobra. Organizes commands and options, validates arguments, adds shell completion suggestions, customizes help, and tests command behavior with captured output and isolated command instances.

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• Building a Go CLI with subcommands
• Adding options and argument validation
• Improving shell completions and help text

Manage dependencies in Go projects, from evaluating a new package to updating versions and resolving conflicts. It covers module files, known vulnerability checks, dependency size audits, and workspaces for developing multiple modules together.

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• Evaluate whether a Go project needs a new dependency
• Update existing dependencies and check the results
• Investigate and resolve dependency version conflicts

Investigate Go crashes, hangs, intermittent failures, and unexpected behavior through reproducible tests and measured evidence. Use race detection, Delve debugging, and pprof diagnostics to trace root causes, then verify fixes and guard against regressions.

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• Tracing the cause of crashes and panics
• Investigating intermittent test failures
• Finding deadlocks and concurrent access problems

Review older Go code and plan updates to language features, standard libraries, tests, and CI. The skill checks the project's Go version, prioritizes safety and correctness, and guides changes with linting and tests.

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• Planning a Go version upgrade
• Replacing deprecated APIs
• Updating test patterns and CI tools

Write and review Go error handling so failures carry useful context and are handled once. Covers error creation, wrapping, inspection, panic usage, and structured logging, where named fields help organize and search production logs.

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• Adding context to returned errors
• Finding ignored errors and duplicate logging
• Reviewing custom error types and error matching

Navigate and refactor Go code with gopls, the official service for understanding Go source. Find definitions, references, and package APIs, then rename or restructure code and check diagnostics against the locally resolved project and dependencies.

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• Finding definitions and call sites in unfamiliar Go code
• Checking references before renaming a function or type
• Discovering package APIs and file dependencies

Restructure existing Go code while preserving its behavior. Uses gopls, Go's code analysis tool, to map affected code and apply changes, with targeted tests and small pull requests for renaming, extracting functions, and moving code between packages.

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• Split oversized functions or types
• Rename identifiers across a Go codebase
• Move code between packages or resolve import cycles

Build Go application initialization with google/wire, which generates constructor calls from declared dependencies. Covers reusable provider groups, interface bindings, cleanup functions, and keeping generated code synchronized so missing dependencies surface during generation.

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• Introduce google/wire for application initialization
• Connect interfaces to concrete implementations
• Manage resource cleanup during initialization

Organize Go application dependencies with samber/do v2, a library that supplies services to the code that needs them. Guides service registration, lifecycle management, module organization, and migration from manually wired constructors.

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• Adopting samber/do v2 in a Go application
• Replacing manually wired constructors with a service container
• Organizing service registration by module

Review Go code for accidental crashes and silent data corruption. This skill guides safer handling of nil values, shared slice storage, numeric conversions, resource cleanup, and types that work safely without explicit initialization.

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• Reviewing nil handling before a code change
• Checking numeric conversions and floating-point comparisons
• Preventing unintended changes through shared slices and maps

Create and review Go API documentation with swaggo/swag. Adds comments describing inputs, responses, and authentication, generates machine-readable API specifications, and connects Swagger UI so API users can inspect the documented endpoints.

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• Adding Swagger documentation to a Go API
• Documenting request fields and response examples
• Describing authentication requirements for endpoints

Helps wire Go applications with uber-go/dig using dependency injection, which supplies the components each function needs. Covers constructor registration, named values, groups, and validation so startup dependencies can be organized and checked in tests.

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• Wire dependencies at application startup
• Distinguish primary and read-only database connections
• Collect HTTP handlers into a group

Build and review Go services using gRPC, a framework for calling functions across services. Covers communication definitions, clients and servers, error codes, timeouts, encrypted connections, streaming, and tests that run without a network.

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• Building gRPC servers and clients
• Reviewing error codes and deadlines
• Configuring TLS and service authentication

Make Go code easier to read by reviewing line breaks, variable declarations, branching, function parameters, and file organization. Provides concrete style guidance for implementation, code reviews, and project standards where formatting tools alone cannot judge clarity.

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• Reviewing Go code for readability
• Simplifying nested branches and complex conditions
• Improving long function signatures and calls

Write and review documentation for Go libraries and applications, from code comments and README files to installation guides and changelogs. Add runnable examples and structured project summaries that help readers and AI agents understand how to use the code.

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• Review exported function and package comments
• Write a README and installation guide
• Add executable code examples