Agent skills
Skills you can use with AI coding agents, indexed from public GitHub repositories.
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method-shorthand-jsdoc
Move helper functions into return objects using method shorthand for proper JSDoc preservation. Use when factory functions have internal helpers that should expose documentation to consumers, or when hovering over returned methods shows no JSDoc.
EpicenterHQ/epicenter 4,333
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define-errors
How to define and use defineErrors from wellcrafted. Use when creating new error types, updating error definitions, or reviewing error patterns. Covers variant factories, extractErrorMessage for cause, InferErrors/InferError for types, and call site patterns.
EpicenterHQ/epicenter 4,333
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single-or-array-pattern
Pattern for functions that accept either a single item or an array. Use when creating CRUD operations, batch processing APIs, or factory functions that should flexibly handle one or many inputs.
EpicenterHQ/epicenter 4,333
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tauri
Tauri path handling, cross-platform file operations, and API usage. Use when the user mentions Tauri, desktop app, or when working with file paths in Tauri frontend code, accessing native filesystem APIs, invoking Tauri commands, or handling platform differences.
EpicenterHQ/epicenter 4,333
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frontend-design
Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, artifacts, posters, or applications (examples include websites, landing pages, dashboards, React components, HTML/CSS layouts, or when styling/beautifying any web UI). Generates creative, polished code and UI design that avoids generic AI aesthetics.
EpicenterHQ/epicenter 4,333
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two-factor-authentication-best-practices
Configure TOTP authenticator apps, send OTP codes via email/SMS, manage backup codes, handle trusted devices, and implement 2FA sign-in flows using Better Auth's twoFactor plugin. Use when users need MFA, multi-factor authentication, authenticator setup, or login security with Better Auth.
EpicenterHQ/epicenter 4,333
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spec-execution
Execute a specification document through planned waves of parallel and sequential changes, updating the spec and committing after each wave. Use when the user says "execute this spec", "implement this plan", "run the spec", or when given a specs/*.md file to implement.
EpicenterHQ/epicenter 4,333
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organization-best-practices
Configure multi-tenant organizations, manage members and invitations, define custom roles and permissions, set up teams, and implement RBAC using Better Auth's organization plugin. Use when users need org setup, team management, member roles, access control, or the Better Auth organization plugin.
EpicenterHQ/epicenter 4,333
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monorepo
Monorepo script commands and conventions for this codebase. Use when the user says "how do I run", "bun run", "build this", "run tests", "typecheck", or when running builds, tests, formatting, linting, or type checking across packages.
EpicenterHQ/epicenter 4,333
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incremental-commits
Break multi-file changes into atomic commits ordered by dependency. Use when the user says "split this into commits", "commit strategy", "break this up", or when making refactors, breaking API changes, or features touching 3+ files that need clean git history.
EpicenterHQ/epicenter 4,333
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services-layer
Service layer patterns with defineErrors, namespace exports, and Result types. Use when the user says "create a service", "service layer", or when creating new services, defining domain-specific errors, or understanding the service architecture.
EpicenterHQ/epicenter 4,333
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typescript
TypeScript code style, type co-location, naming conventions (including acronym casing), and arktype patterns. Use when the user mentions TypeScript types, naming conventions, or when writing .ts files, defining types, naming variables/functions, or organizing test files.
EpicenterHQ/epicenter 4,333
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elysia
Elysia.js server patterns for error handling, status responses, and plugin composition. Use when the user mentions Elysia, Eden Treaty, or when writing API route handlers, returning HTTP errors, creating server plugins, or working with type-safe API clients.
EpicenterHQ/epicenter 4,333
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email-and-password-best-practices
Configure email verification, implement password reset flows, set password policies, and customise hashing algorithms for Better Auth email/password authentication. Use when users need to set up login, sign-in, sign-up, credential authentication, or password security with Better Auth.
EpicenterHQ/epicenter 4,333
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error-handling
Error handling patterns using wellcrafted trySync and tryAsync. Use when writing or reviewing try-catch blocks, refactoring try-catch to linear control flow, working with Result types, or returning HTTP error responses from route handlers.
EpicenterHQ/epicenter 4,333
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social-media
Social media post guidelines for LinkedIn, Reddit, and Twitter/X. Use when the user says "post on LinkedIn", "write a tweet", "draft a Reddit post", "share this", or when drafting announcements or sharing technical content on social platforms.
EpicenterHQ/epicenter 4,333
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github-issues
GitHub issue comment guidelines for community interaction. Use when the user says "respond to this issue", "reply to this bug report", "close this issue", or when responding to GitHub issues, bug reports, feature requests, or any GitHub discussion.
EpicenterHQ/epicenter 4,333
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git
Git commit and pull request guidelines using conventional commits. Use when the user says "commit this", "stage and commit", "write a commit message", "create a PR", or when creating commits, writing commit messages, or reviewing PR descriptions.
EpicenterHQ/epicenter 4,333
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better-auth-best-practices
Configure Better Auth server and client, set up database adapters, manage sessions, add plugins, and handle environment variables. Use when users mention Better Auth, betterauth, auth.ts, or need to set up TypeScript authentication with email/password, OAuth, or plugin configuration.
EpicenterHQ/epicenter 4,333
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workspace-api
Workspace API patterns for defineTable, defineKv, versioning, migrations, and data access (CRUD + observation). Use when the user mentions workspace, defineTable, defineKv, createWorkspace, or when defining schemas, reading/writing table data, observing changes, or writing migrations.
EpicenterHQ/epicenter 4,333
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arktype
Arktype patterns for runtime validation, discriminated unions with .merge() and .or(), spread key syntax, and type composition. Use when the user mentions arktype, type(), or when building union types, combining schemas with variants, or defining command/event schemas.
EpicenterHQ/epicenter 4,333
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svelte
Svelte 5 patterns including runes ($state, $derived, $props), TanStack Query, SvelteMap reactive state, shadcn-svelte components, and component composition. Use when the user mentions .svelte files, Svelte components, or when using TanStack Query, fromTable/fromKv, or shadcn-svelte UI.
EpicenterHQ/epicenter 4,333
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autumn
Integrate Autumn billing—define features/plans in autumn.config.ts, use autumn-js SDK for credit checks/tracking, manage the atmn CLI for push/pull. Use when working on billing, pricing, credits, plan gating, or metered usage.
EpicenterHQ/epicenter 4,333
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handoff-prompt
Draft a self-contained implementation prompt that an agent can execute with zero prior context. Use when the user says "draft a prompt", "write a handoff", "make a prompt I can copy-paste", "create a delegation brief", or wants to hand off a task to another agent, tool, or conversation.
EpicenterHQ/epicenter 4,333