40 curated agent skills — plain SKILL.md files for building calm, native software and running AI coding agents well. Claude Code, Codex, Cursor, Grok, Goose.
Skill Claude CodeCodex
Run before building anything new — a pre-build gate that decides whether an idea deserves its own tool, judged from both the agent lens (legible, drivable, automatable) and the human lens (will I touch it, do I want to maintain it). Trigger on "should I build X", "starting a new project / app / tool / repo", "is this…
Skill Claude CodeCodex
Run on an existing project to decide KEEP / MERGE / ARCHIVE — never limbo. Forces a call on tools that already exist and may have stopped earning their keep. Trigger on "is this still worth keeping", "audit this repo", "tech-debt cleanup", "sweep the folder", "what's dead here", or any signal that something hasn't…
Skill Claude Code
Use when returning to a repo after a break, asking what changed, what's new for this stack, or invoking project-catch-up after explain-new-project. Scans the stack for important updates, deprecations, new helper tools, agent skills, and MCP servers online—plain-language brief saved as PROJECTCATCHUP.md.
Skill Claude Code
Use when the user wants the full package on a repo, says run my project workflow, project check-in, or is overwhelmed opening an old or new folder. Runs the project onboarding checklist—explain-new-project, project-worth-my-time, and project-catch-up—in order or on demand.
Skill Claude Code
Use after PROJECTGUIDE.md exists, when the user asks if a project is worth their time, should they build vs buy, or invokes project-worth-my-time. Follow-up to explain-new-project—weighs project context (files, git history, chat) to recommend whether to invest in a repo, cherry-pick a feature, park the idea, pass, or…
Skill Claude CodeCodex
At the end of a long working session, produce a counterfactual trace note — a backward walk through the session that identifies the small number of load-bearing moments (observations, failures, accidents, decisions) without which the final outcome would not exist. Use this whenever the user asks to "close the…
Skill Claude CodeCodex
Before improving anything, show the spread of what can concretely be done on this specific input — a short menu of 3-5 interventions from lightest to heaviest touch, then wait for the user to pick. Domain-agnostic; works on any material the user hands over. Trigger when the user says "spread", "show me my options"…
Skill Claude CodeCodex
Teach the user exactly ONE thing from the current session or project, in plain English, one or two short paragraphs. Use when the user types ;til or "til", asks "what did I learn", "explain one thing from this session", or at session close alongside other closing rituals. Also appropriate mid-session when a concept…
Skill Claude CodeCodex
Use when exposing app features to App Intents, Shortcuts, Siri, Spotlight, widgets, controls, or system actions — small safe AppIntents, AppShortcutsProvider, AppEnum/AppEntity, parameters, and open-vs-background behavior.
Skill Claude CodeCodex
Use when shipping a macOS app outside the App Store — Developer ID signing with hardened runtime, notarization with notarytool, stapling, building a clean drag-to-Applications DMG, and verifying the result launches on a stranger's Mac.
Skill Claude CodeCodex
Use when reading, writing, or watching the macOS clipboard — NSPasteboard types and multiple representations, the changeCount polling pattern, the transient/concealed pasteboard conventions clipboard tools must respect, and the Sequoia paste-privacy alerts.
Skill Claude CodeCodex
Use when adding or reviewing keyboard shortcuts in a macOS app — in-app vs global, RegisterEventHotKey vs the KeyboardShortcuts package vs NSEvent monitors, user-configurable recording, conflict handling, and which defaults won't collide with the system.
Skill Claude CodeCodex
Use when adding, reviewing, or debugging Launch at Login in a macOS app — SMAppService registration, the requiresApproval state, a Settings toggle that reflects reality, and migration off deprecated login-item APIs.
Skill Claude CodeCodex
Use when building, refactoring, or debugging a macOS menu bar app with SwiftUI, or when a MenuBarExtra misbehaves — the icon renders wrong or vanishes, the Settings window opens behind other apps, the popover cannot be closed, controls inside a .menu style do not render, the Dock icon comes back, or the app quits when…
Skill Claude CodeCodex
Use when adding or reviewing macOS user notifications — UNUserNotificationCenter permission flow, categories and action buttons, click routing through the delegate, foreground presentation, and rules that keep notifications from becoming spam.
Skill Claude CodeCodex
Use when a macOS app needs a TCC permission or touches private data — the map of which API, Info.plist key, and entitlement each permission needs, pre-prompt explanation patterns, denied-state recovery with System Settings deep links, and honest privacy copy.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: