TypeScript 6 and 7: tsconfig past strict, narrowing, generics, types from types, branded types, data at the edges, escape hatches, typed linting, Node type stripping, and the upgrade to TS 7.
Plugin typescript-safety from marketplace leahycc-skills in LeahyCC/claude-skills. Commands read from the repo's manifest — 13 days ago.
typescript-safetyMakes TypeScript catch more bugs at compile time on TS 6 and 7: tsconfig flags past strict, narrowing and discriminated unions, exhaustive switches, generics and inference (satisfies, const type parameters, NoInfer), utility, mapped, conditional, and template literal types, branded types, unknown at
OWASP API Security Top 10 (2023) and Web Top 10 (2025) with production Next.js App Router code: access control, authentication with MFA and password reset, input validation, rate limiting, security headers and CSRF, data exposure, supply chain, SSRF, file uploads, and AI tools on those APIs
1 skill
Everything drawn with text characters, for work or fun: diagrams, tables, bar charts, sparklines, banners, boxes, pictures, pixel sprites, kaomoji, game boards and mazes. Draws on a grid, hands the counting to 5 Node scripts, and checks alignment before showing.
1 skill
Code a cold reader can follow: no floating (magic) numbers or strings without a name or a unit-and-why note nearby, names that carry units and do not lie, small single-purpose functions, shallow nesting, honest comments, no dead code, and balanced ESLint tuning.
1 skill
Silent bugs that pass typecheck and happy-path tests: 200 HTML fallbacks, pre-await state commits, swallowed catches, module singletons, Web API footguns, fresh-clone gaps, and false-green tests.
1 skill
OWASP LLM Top 10 (2026) and Agentic Top 10 (2026) when a model can see untrusted content or act with real credentials. Trust boundaries, tools, memory, MCP, supply chain, output handling, and human approval.
1 skill
Version-aware Next.js App Router guidance: component boundaries, data, caching, routing, proxy, errors, metadata, assets and migration. Scoped source review in skills/nextjs-app-router/SOURCES.md.
1 skill
Persistent memory for Claude Code: the next session starts where the last one left off.
29 skills · 1 MCP server · hooks
Skill: add headroom-ai compress() to a Python or TypeScript app to cut LLM input tokens (tool outputs, logs, JSON, chat history). No API key.
1 skill
Build and deploy Base44 full-stack apps with CLI project management and JavaScript/TypeScript SDK development skills
9 skills
Payload Development plugin - covers collections, fields, hooks, access control, plugins, and database adapters.
1 skill
JavaScript and TypeScript development with ES6+, Node.js, React, and modern web frameworks
4 skills · 1 command · 2 agents
Build and deploy on Val Town. Bundles the Val Town MCP server and platform skills (HTTP vals, cron/intervals, SQLite, email, OAuth, React UI, third-party integrations, templates).
11 skills · 1 MCP server
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