Golang concurrency patterns. Use when writing or reviewing concurrent Go code involving goroutines, channels, select, locks, sync primitives, errgroup, singleflight, worker pools, or fan-out/fan-in pipelines. Also triggers when you detect goroutine leaks, race conditions, channel ownership issues, or need to choose between channels and mutexes.
CI/CD pipeline configuration using GitHub Actions for Golang projects — testing, linting, SAST, security scanning, code coverage, Dependabot, Renovate, GoReleaser, code review automation, and release pipelines. Use when setting up or improving Go project CI, configuring GitHub Actions workflows, adding linters or security scanners, automating dependency updates, or adding quality gates.
Production-ready Golang tests — table-driven tests, testify suites and mocks, parallel tests, fuzzing, fixtures, goroutine leak detection with goleak, snapshot testing, code coverage, integration tests, idiomatic test naming. Use when writing or reviewing Go tests, choosing a testing approach, setting up Go test CI, or debugging flaky/slow tests.
Use this skill to run an Ebitengine app (anything implementing ebiten.Game) headlessly and programmatically — no visible window and no changes to the app's source — to test, debug, screenshot, or otherwise exercise it. It launches the app as a vmhost guest, drives it through its ticks faster than real time, injects keyboard / mouse / touch / gamepad / text input, reads the rendered frame back as pixels to assert on or dump as a PNG, and observes the audio the app plays. Use when you need input injection, deterministic multi-tick runs, golden-image checks, or audio assertions — for example to reproduce an input-dependent bug, verify behavior after a sequence of clicks or key presses, check that the right sound plays, capture a single rendered frame, or let an AI agent drive an app end-to-end.
Use this skill when writing or modifying GUI code with the Guigui framework (github.com/guigui-gui/guigui): creating or editing a widget, composing a layout, wiring buttons / text inputs / lists, passing shared state down the widget tree, handling pointer or keyboard input, or figuring out why a change to a field does not show up on screen. Covers the widget lifecycle (Build / Layout / Measure / Draw / input), LinearLayout sizing, Env-based dependency injection, the event-key callback pattern, dynamic child lists, and when state changes trigger a rebuild. Not for general Ebitengine rendering questions that do not involve Guigui widgets.