Claude Skills by Intense-Visions

> Integrate tRPC with Next.js App Router using the fetch adapter, server-side callers, and React Server Components

> End-to-end type-safe data fetching with `api.xxx.useQuery`, `useMutation`, and cache invalidation via TanStack Query

> Organize type-safe RPC procedures into nested routers that merge into a single appRouter

> Stream real-time events to clients over WebSocket using tRPC subscriptions and observables

> Type async/await, Promise chains, and concurrent patterns correctly in TypeScript

> Prevent mixing semantically distinct primitives using branded opaque types

> Use abstract classes, private fields, access modifiers, and implements vs extends correctly

> Use conditional types, infer, and distributive logic to derive types programmatically

> Configure tsconfig with extends, project references, composite builds, and incremental compilation

> Extend existing types, modules, and namespaces via declaration merging and augmentation

> Implement class, method, and property decorators with reflect-metadata in TypeScript

> Model mutually exclusive states with discriminated unions and exhaustive narrowing

> Model and type errors explicitly using Result types, discriminated unions, and typed throws

> Write reusable, type-safe functions and interfaces using TypeScript generics

> Transform object types by iterating over their keys with mapped type syntax

> Organize TypeScript code with ES modules, barrel exports, path aliases, and declaration files

> Reduce TypeScript compilation time and type complexity with targeted optimizations

> Validate objects against a type without widening using the satisfies keyword

> Enable and satisfy strict TypeScript checks including strictNullChecks and exactOptionalPropertyTypes

> Construct precise string types using template literal syntax and string manipulation types

> Test TypeScript types at compile time using expect-type, tsd, and vitest type matchers

> Narrow union types safely using type guards, assertion functions, and control flow

> Apply built-in TypeScript utility types to transform and compose types without redundancy

> Use Zod schemas as the single source of truth for runtime validation and TypeScript types

> Walk a human through user-acceptance testing for a shipped change, one acceptance item at a time, and record their decision. The terminal, human-authority stage of the change lifecycle under `docs/changes/<slug>/`: the spec, plan, code review, and outcome-eval all key on the same slug; this captures whether the shipped reality is accepted against the change's Success Criteria. The human is the authority — this skill never judges, it records.

> Active voice in UI writing — active vs passive voice, when passive is acceptable, verb-first patterns for buttons and actions

> Button and CTA copy — verb-noun pattern, specificity over vagueness, context-sensitive labels, and writing buttons that tell users exactly what will happen

> Confirmation dialogs — destructive action writing, consequence clarity, and specific button labels that make irreversibility unmistakable

> Content hierarchy in UI — heading structure, progressive disclosure in text, inverted pyramid for interface writing

> Data table copy — column headers, empty cells, truncation patterns, filter and sort labels, bulk action copy

> Destructive action copy — irreversibility warnings, undo availability, double-confirmation patterns, cooldown messaging

> Empty states — first-use, user-cleared, and no-results patterns that motivate action, set expectations, and turn blank screens into onramps

> Error messages — what went wrong, why it matters, how to fix it, the three-part error pattern for clear, actionable error communication

> Error severity communication — calibrating error tone to severity, from field validation to system failure to data loss

> Form labels and helper text — label clarity, placeholder anti-patterns, required-field indication, and writing forms that users complete without confusion

> Inclusive language in UI — gender-neutral, ability-neutral, culture-aware writing, avoiding idioms that exclude

> Writing for internationalization — source strings that survive translation, concatenation traps, pluralization, date and number references

> Loading state copy — progress transparency, expectation setting, and writing text that reduces perceived wait time and prevents users from abandoning

> Microcopy principles — clarity, brevity, human voice, active voice, and the core rules all UI text follows

> Navigation label writing — menu item naming, breadcrumb clarity, tab labels, and sidebar organization that users scan without reading

> Notification and alert copy — urgency calibration, actionability, toast vs banner vs modal selection, and writing messages that inform without overwhelming

> Onboarding copy — progressive disclosure, value-first framing, reducing anxiety, and welcome flows that convert sign-ups into active users

> Permission and access copy — role-based messaging, upgrade prompts, gating copy, "you don't have access" patterns

> Plain language for UI — reading level targeting, jargon elimination, sentence structure for scanning

> Search copy — placeholder text, zero-results messaging, autocomplete hints, search scope indicators, saved search patterns

> Settings and preferences copy — toggle descriptions, preference explanations, consequence previews, settings organization

> Success feedback copy — confirmation messages, celebration calibration, and next-step prompts that close the action loop and guide users forward

> Tooltip and contextual help writing — when to use tooltips, what to put in them, and progressive disclosure patterns that educate without interrupting

> Voice and tone in UI writing — defining voice (constant) vs tone (contextual), formality calibration, and emotional register

> Writing for scanning — F-pattern, front-loading keywords, chunking, bullet vs prose decisions for UI text