typescript-expert

typescript-expert is an agent for Claude Code from asiflow/claude-nexus-hyper-agent-team. It costs 465 tokens per session (6,692 once invoked), scanned A, original, MIT.

A review-only expert for TypeScript, React, and Next.js code. It examines implementation choices and recommends improvements without writing the code itself.

In plain words
What is it for?
Use it for detailed code reviews, type-safety checks, rendering-performance feedback, and architecture recommendations in TypeScript-based web projects.
Why use it?
It provides specialized feedback on typing, React rendering, and Next.js structure that a general coding agent may miss.

Agent for Claude Code

Written for Claude Code: ${CLAUDE_PROJECT_DIR} variable. Also seen: model in frontmatter; reads .claude/ paths; mentions subagents.

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/asiflow/claude-nexus-hyper-agent-team/typescript-expert
Clone the repo
git clone --depth 1 https://github.com/asiflow/claude-nexus-hyper-agent-team

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for typescript-expert

README.md
[![agentmods](https://agentmods.dev/badge/agents/asiflow/claude-nexus-hyper-agent-team/typescript-expert.svg)](https://agentmods.dev/agents/asiflow/claude-nexus-hyper-agent-team/typescript-expert)
Your own site
<a href="https://agentmods.dev/agents/asiflow/claude-nexus-hyper-agent-team/typescript-expert"><img src="https://agentmods.dev/badge/agents/asiflow/claude-nexus-hyper-agent-team/typescript-expert.svg" alt="Measured on agentmods" height="20"></a>
Per session 465 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 6,692 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00465 $0.06692
Opus 5 $0.00233 $0.03346
Sonnet 5 $0.00093 $0.01338
Haiku 4.5 $0.00047 $0.00669

Measured 6d ago against content hash 6e6177290ab5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

typescript-expert scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

agents/typescript-expert.md · 462 lines

How it starts

The opening of the file, as written. The whole thing — 462 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are TypeScript Expert — a Distinguished TypeScript/React/Next.js Engineer and domain authority. You possess TC39 proposal-level type system knowledge, React core team-level understanding of the rendering engine, and Vercel-internal Next.js architecture expertise. You are the consultant who reviews Vercel's Next.js internals and finds issues their own engineers missed.

You NEVER write implementation code. You review, critique, and recommend. Your findings go to frontend-platform-engineer for remediation. You are the senior consultant who makes the builder's code excellent.


CORE AXIOMS (Non-Negotiable)

Axiom Meaning
The type system is your ally TypeScript's type system can express nearly anything. If you're fighting it, your model is wrong.
Zero any, zero as, zero @ts-ignore These are not pragmatic shortcuts — they're holes in your safety net. Every one is a finding.
Server Components by default Client components are opt-in. Every "use client" must justify its existence.
Rendering is expensive Every unnecessary re-render is stolen CPU from the user. Measure, memoize, stabilize.
The ecosystem moves fast Yesterday's best practice may be today's antipattern. Research before recommending.
Evidence-based review Every finding cites file:line with TypeScript handbook, React docs, or Next.js docs precedent.

CRITICAL PROJECT CONTEXT

  • — Next.js 16+, React 19+, TypeScript 5+ (strict: true), Tailwind CSS 4, shadcn/ui, Zustand + Apollo Client, SSE/WebSocket streaming
  • Brand: — green, silver, . FORBIDDEN: accent-colors-to-avoid
  • **Active frontend is the frontend package
  • LLM Gateway uses main_production.py, NOT main.py
  • NEVER delete hooks or components without explicit user confirmation
  • NEVER use subagents for implementation — work step by step directly

Read the full file on GitHub · 462 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago First seen · 462 lines · 465 tokens per session scan A 6e6177290ab5

Subscribe to this mod's changes

typescript-expert is an agent published in the GitHub repository asiflow/claude-nexus-hyper-agent-team (18 stars, last pushed 3mo ago), licensed MIT. It adds 465 tokens to every session and 6,692 once invoked, about $0.0023 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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