Writing Markdown
Writes and edits lint-compliant markdown files following markdownlint rules and best practices. Use when creating, editing, or reviewing .md files, README files, documentation, or any markdown content.
Better Auth
Better Auth integration expertise for TypeScript authentication. Triggers when implementing auth flows, configuring OAuth providers, setting up sessions, email verification, password reset, or any file importing from better-auth. Use for auth configuration, plugin setup, database adapters, session management, hooks, and security best practices.
Refactoring Legacy
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Park
End-of-day shutdown ritual. Surveys branches and stashes, captures session context, locks in tomorrow's first task, and writes a structured parking receipt the next session can read cold. Grounded in Zeigarnik Effect research.
Agent Philosophy
Explains WHY agent operating principles exist, citing CS texts (Brooks, Dijkstra, Gall's Law, Ousterhout). Use ONLY when asked about rationale, philosophy, or source references. NOT for task execution—use agent-operating-standard instead. Triggers on "why does the standard say", "explain the principle", "what's the reasoning".
Drizzle Migrations
Manages Drizzle ORM migrations with PostgreSQL for multi-environment setups (local/staging/production). Use when working with drizzle-kit, schema syncing, or migration workflows.
Score
Score any artifact on a 1-100 rubric with auto-iteration to a target score (e.g. /stone-giant:score 90). Builds a tailored rubric, identifies what would raise the score, and can auto-apply improvements. Built-in guardrails prevent gaming.
Signup Signin
Sign-up and sign-in UX as a design + copy discipline. Use when building or reviewing any auth surface — sign-up, sign-in, OTP, magic-link, passkey enrollment, forgot-password, recovery, or lockout. Owns the user-facing experience (copy, error states, recovery affordances, persona tests); defers integration mechanics to the relevant stack skill (`better-auth`, `resend`, `clerk`, etc.). See the "Wh…
Kysely Orm
Kysely ORM patterns for type-safe SQL query building, migrations, and TypeScript integration. Use when working with Kysely, writing type-safe queries, or managing database schemas with Kysely migrations.
Relational Db Theory
Universal relational database theory - normalization, keys, constraints, and anti-patterns that apply to ALL relational databases (PostgreSQL, MySQL, SQL Server, SQLite, etc.). Use when designing schemas, reviewing database structures, or discussing relational concepts.
Design Ninja
UI/UX design patterns for visual hierarchy, typography, color, spacing, and components. Use when designing interfaces, reviewing UI, choosing colors/fonts, or needing spacing patterns. Triggers on "make it look good", "UI review", "design system", "spacing", "typography", "color palette", CSS spacing.
Dates And Times
World-class date, time, and timezone handling based on Jon Skeet's NodaTime principles and the TC39 Temporal API (Stage 4 / ES2026). Triggers when working with Date objects, Temporal types, timestamps, timezone conversions, scheduling, or any temporal logic. Use to avoid the countless bugs caused by datetime mishandling.
Sql Server Safety
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Zen Break
Suggests mindful breaks for wellness during long coding sessions. Triggers on fatigue signals, stress expressions, extended work, explicit requests ("need a break", "zen break"), or proactively during long conversations.
Sql Server
SQL Server and Azure SQL database design with proper types, naming conventions, indexing strategies, temporal tables, dynamic data masking, and T-SQL patterns. Use when designing schemas, writing DDL, or working with SQL Server or Azure SQL databases.
Eval Npm
Evaluate npm packages for maintenance health, community adoption, security posture, and alternatives. Runs security pre-checks via Socket.dev and OSV.dev. Always expands single-package queries into comparisons.
Zod Ninja
Zod schema design for form validation in React Router v7 apps using Conform or TanStack Form. Triggers when editing files that import from zod, working with form validation, creating schemas for Conform or TanStack Form, or defining input validation for route actions.
PDF processing router - delegates to specialized sub-skills for extraction, creation, and charting. Triggers when working with PDF files, generating reports, or creating data visualizations for print.
Product Wisdom
Product management frameworks and counterintuitive truths from Lenny's Podcast. Use when helping with product strategy, prioritization, roadmap decisions, feature scoping, team structure, customer discovery, activation metrics, positioning, or when the user is making product decisions that could benefit from battle-tested PM wisdom. Triggers on questions about what to build, how to prioritize, te…
Pdf Extract
Smart PDF content extraction with context, page references, and pattern matching. Triggers when finding specific content in PDFs (contract prices, terms), searching for patterns, extracting images, or needing snippets with surrounding context.
Js Ninja
Elite JavaScript/TypeScript developer with deep expertise in modern language features, performance optimization, and pragmatic engineering. Use when writing, reviewing, or debugging pure JS/TS or Node.js code, discussing language-level architecture decisions, or needing battle-tested patterns. Triggers on JavaScript, TypeScript, Node.js, Promise/async code, npm packages, and JS performance questi…
Seo Geo Aeo
Audit and improve a site's visibility in search and AI answer engines (SEO, GEO, AEO). Use when asked to assess SEO/GEO/AEO, check AI-search / AI-Overview visibility, generate an optimization playbook, or track ranking and citation progress over time. Runs as `/stone-giant:seo-geo-aeo assess|playbook|track|competitors|compare|refresh <target>` and reads data from Google Search Console, GA4, Light…
React Router V7
React + React Router v7 framework mode expertise for Remix-style full-stack applications. Triggers when writing general React components (memoization, state derivation, keys, anti-useEffect patterns) or editing loaders, actions, route modules, react-router.config.ts, middleware, or any file importing from react-router or @react-router/*. Use for React patterns, route data loading, mutations, erro…
Testing Ninja
Pragmatic testing guidance for JS/TS, React, and React Router. Focuses on confidence-to-effort ratio, behavioral testing, and avoiding brittle implementation-detail tests. Use when writing Vitest, Playwright, or React Testing Library code.
Pdf Charts
Data visualization for PDF reports - charts, graphs, and dashboards rendered to print-ready format. Triggers when creating reports with charts, generating data visualizations for PDF output, or building dashboard exports.
Resend
Resend email API expertise for transactional emails, notifications, and batch sends. Triggers when sending emails, implementing email notifications, password resets, order confirmations, or any file importing from resend. Use for email sending, webhooks, templates, deliverability, and error handling.
Sql Server Performance
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Ci Performance
Make a CI/CD pipeline faster. Use when asked to speed up CI, cut build/test wall-clock, fix a slow pipeline, or decide whether bigger runners vs sharding vs caching will help. A measure-the-critical-path mental model plus a stop-when-it-stops-paying ladder (cache deps -> parallel jobs -> shard tests -> isolate per-shard resources -> right-size runners -> build cache -> test selection -> merge que…
Agent Operating Standard
Reliability, safety, and execution discipline standard for autonomous software agents. Defines minimum operational requirements — correctness over cleverness, reversibility over speed, evidence over narrative. Use when establishing operating guardrails for an autonomous coding agent or defining how an agent should behave safely.
Postgresql
PostgreSQL database design with proper types, naming conventions, indexing strategies, and JSONB patterns. Use when designing schemas, writing DDL, or optimizing PostgreSQL databases.
Pdf Create
Professional PDF document creation with expert typography, branding, and print-production quality. Triggers when generating branded documents, creating reports, building invoices, or any PDF output requiring professional layout and typography.
Npm Security Advisory
Security advisory pre-check for npm packages using Socket.dev and OSV.dev. Triggers when installing, updating, evaluating, or adding npm packages. Use BEFORE any install, update, or evaluate operation to detect compromised, malicious, or vulnerable packages and their transitive dependencies.
Writing Marketing Copy
Write persuasive marketing copy for landing pages, emails, ads, and sales materials using proven principles from legendary copywriters like David Ogilvy, Gary Halbert, Eugene Schwartz, and Bill Bernbach. Use when creating landing pages, email campaigns, sales letters, advertisements, headlines, taglines, value propositions, calls to action, product descriptions, or any marketing content. Triggers…
Lambda
AWS Lambda and CDK expertise for serverless functions, infrastructure as code, event-driven architectures, cold start optimization, and production patterns. Use when writing Lambda handlers, CDK stacks, NodejsFunction constructs, configuring triggers, optimizing performance, or any serverless compute patterns. Triggers on Lambda, serverless, handler, cold start, event source, API Gateway integrat…