Adversarially hunt for correctness bugs and regressions in a change set. Use when reviewing a diff before finalizing, during a cleanup pass, or when asked to find bugs, pressure-test, or stress-test recently modified code. Triggers on: "find bugs", "what could break", "review for correctness", "did I break anything", "hunt regressions", "adversarial review", "pressure-test this change".
End-of-session cleanup pass for Swift code. Use this skill whenever the user asks to "clean up", "polish", "tidy", "refactor", or "review" Swift work at the end of a coding session, or when they invoke this skill by name. Performs a holistic review of files modified during the session — simplification, type-driven design, macOS conventions, and comment hygiene. Make sure to use this skill anytime the user signals they want to wrap up or finalize Swift work, even if they don't explicitly say "cleanup". Do NOT use for one-off edits, bug fixes, or active feature work.
End-of-session cleanup pass for TypeScript, React, and web code. Use this skill whenever the user asks to "clean up", "polish", "tidy", "refactor", or "review" web/frontend work at the end of a coding session, or when they invoke this skill by name. Performs a holistic review of files modified during the session — simplification, type safety, React patterns, CSS modernization, and comment hygiene. Make sure to use this skill anytime the user signals they want to wrap up or finalize TypeScript/React/web work, even if they don't explicitly say "cleanup". Do NOT use for one-off edits, bug fixes, or active feature work.
Simplify and refine recently modified code for clarity and consistency. Use after writing or modifying code, during cleanup passes, or when asked to simplify/refactor without changing behavior.
Pull PR review comments and triage them — separate substantive feedback from bikeshedding, stale comments, misreads, AI slop, and other noise. Use this skill whenever the user asks to "review my PR comments", "triage feedback", "go through my PR", or wants help deciding what to address vs push back on. Make sure to use this skill anytime the user mentions PR comments or code review feedback, even if they don't explicitly say "triage". Pulls comments via the `gh` CLI, classifies each, and proposes an action with a draft response. Do NOT use for writing PR descriptions, reviewing someone else's PR, or applying the changes — this skill triages and drafts only.
The 23 Gang of Four object-oriented design patterns (Gamma, Helm, Johnson, Vlissides, 1994) distilled as a practical field guide, not a catalog. Use when naming a shape in code review, choosing between competing designs, deciding whether to introduce indirection, or auditing for over-abstraction. Each pattern documents intent, tradeoffs, modern relevance, language-level replacements, and when NOT to use it. Triggers on: "design pattern", "GoF", "factory", "builder", "singleton", "adapter", "decorator", "observer", "strategy", "visitor", "state machine", "command pattern", "too many constructors", "subclass explosion", "program to an interface", "composition over inheritance", "am I over-abstracting this", "Swift design patterns", "protocol-oriented programming", "POP in Swift", "Crusty talk", "protocol vs class", "value types over reference types", "start with a protocol".
Build native macOS desktop applications in Swift using AppKit and SwiftUI. Use when building or modifying macOS .app bundles, NSDocument-based apps, menu bar apps, preferences windows, NSWindow/NSToolbar/NSSplitView layouts, NSMenu/NSStatusItem, Core Data/SwiftData/GRDB persistence, drag-and-drop, undo/redo, sandboxing, notarization, Sparkle auto-updates, XPC helpers, or XCTest for macOS. Also covers GPU-accelerated rendering with Metal and CAMetalLayer, infinite canvas UIs, libghostty terminal embedding, and WKWebView embedding. Trigger on AppKit, NSApplicationDelegate, NSDocument, NSViewController, Swift+Metal, macOS code signing, or when a user asks for production-grade Swift desktop patterns from repos like CodeEdit, Rectangle, CotEditor, IINA, Ice, Stats, Xcodes.app, STTextView, or Ghostty.
Use when adding, removing, or renaming a skill in this repository to keep the Available Skills table in README.md current.