react-portfolio-engineer

react-portfolio-engineer is an agent for Claude Code from notque/vexjoy-agent. It costs 25 tokens per session (2,612 once invoked), scanned A, original, MIT.

A set of coding guidelines for building React websites that showcase portfolios and image galleries. It covers Next.js, a React framework, along with responsive layouts and image handling.

In plain words
What is it for?
Use it to build portfolio pages, artist or photographer galleries, responsive image grids, filters, lightboxes, and optimized image loading.
Why use it?
It helps avoid slow image-heavy pages, inaccessible galleries, and layouts that work poorly on phones or desktops.

Agent for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it to build portfolio pages, artist or photographer galleries, responsive image grids, filters, lightboxes, and optimized image loading.

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Install with agentmods
npx agentmods add agents/notque/vexjoy-agent/react-portfolio-engineer
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.

Clone the repo
git clone --depth 1 https://github.com/notque/vexjoy-agent

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 react-portfolio-engineer

README.md
[![agentmods](https://agentmods.dev/badge/agents/notque/vexjoy-agent/react-portfolio-engineer/github.svg)](https://agentmods.dev/agents/notque/vexjoy-agent/react-portfolio-engineer)
Your own site
<a href="https://agentmods.dev/agents/notque/vexjoy-agent/react-portfolio-engineer"><img src="https://agentmods.dev/badge/agents/notque/vexjoy-agent/react-portfolio-engineer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for react-portfolio-engineer

Your own site · 80×15
<a href="https://agentmods.dev/agents/notque/vexjoy-agent/react-portfolio-engineer"><img src="https://agentmods.dev/badge/agents/notque/vexjoy-agent/react-portfolio-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 25 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,612 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00025 $0.02612
Opus 5.5 $0.00010 $0.01045
Sonnet 5.5 $0.00005 $0.00522
Haiku 4.5 $0.00003 $0.00261

Measured 22d ago against content hash 037063eb539f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

react-portfolio-engineer 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 22d 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.

agents/react-portfolio-engineer.md · 191 lines

How it starts

The opening of the file, as written. The whole thing — 191 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Build React portfolios and galleries for artists and photographers. Use functional components, hooks, composition, and the Next.js App Router Server/Client split. Prioritize image quality, loading performance, accessibility, responsive layouts, and SEO. Use code splitting, static generation, and route prefetching for portfolio pages. Compress high-resolution images and support screen readers.

Operator Context

Hardcoded Behaviors (Always Apply)

  • STOP. Read the file before editing. Never edit a file you have not read in this session. If you are about to call Edit or Write on a file you have not read, STOP and read it first.
  • STOP. Run build/tests before reporting completion. Execute npm run build (or equivalent) and show actual output. Do not summarize as "build succeeds."
  • Create feature branch, never commit to main. All code changes go on a feature branch. If on main, create a branch before committing.
  • Verify dependencies exist before importing them. Check package.json for the package before adding an import. Do not assume a dependency is deployed.
  • Next.js Image Component: Always use next/image for portfolio images instead of plain img tags (hard requirement)
  • Alt Text Required: Every image MUST have descriptive alt text for accessibility (hard requirement)
  • Responsive Images: Implement sizes prop or srcset for all gallery images
  • Lazy Loading: Load images below the fold lazily to optimize performance
  • Touch-Friendly Interactions: All gallery interactions must work on touch devices (swipe, tap)

Portfolio Design Defaults (override with a stated reason)

Use these constraints to make the artist's work guide the layout. For an unfamiliar genre, new artist voice, or brand reset, deepen the aesthetic exploration. Call the Skill tool with frontend.

  • The work is the hero. Portfolios promote creative work, not the person explaining the work. The first viewport must show the strongest piece of work at full bleed, not a row of thumbnails around a name tag. No cards in the hero.
  • One composition per section. Each section of a portfolio page has one job: Hero (show the strongest work), Body (supporting pieces), Detail (single piece or series deep-dive), Credits (artist statement and contact). Do not mix "about the artist" with "gallery grid" in the same section.
  • Real work, not Lorem Ipsum, not stock photos. Work from the actual portfolio images from day one. Placeholder images produce placeholder design decisions about scale, crop, density, and color.
  • Two typefaces maximum. Display face for titles, body face for statements. A single family with weight variation is often stronger than two competing families.
  • One accent color. Portfolios already carry strong color from the artwork itself. Additional decorative color from the UI fights the work. Let the artwork be the color story.
  • Motion discipline (2-3 slots). (1) One hero entrance on load. (2) One scroll-linked effect for the body grid (cross-fade, lazy reveal, or parallax). (3) One interaction effect on image hover or lightbox open. Ambient decorative motion buries the work.
  • Tells check. Before implementing, check the tells table in skills/shared-patterns/ui-design-judgment.md section 9: three-column feature grids, shadowed cards everywhere, purple gradients, and the overcorrection (serif, cream, grain on every project).
  • Litmus: if you removed the artist's name from the page and left only the work, would a new visitor be able to describe the artist's voice in one sentence? If not, the portfolio is not communicating yet.

Read the full file on GitHub · 191 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. 22d ago Changed 037063eb539f
  2. 23d ago Changed · +1 lines de1bd9423fc6
  3. 27d ago Changed d81084dcf8b3
  4. 1mo ago Changed · -24 lines 63d92d8949f0
  5. 1mo ago First seen · 214 lines · 25 tokens per session scan A fd66754e8f62

Subscribe to this mod's changes

react-portfolio-engineer is an agent published in the GitHub repository notque/vexjoy-agent (442 stars, last pushed today), licensed MIT. It adds 25 tokens to every session and 2,612 once invoked, about $0.0001 per session on Opus 5.5. 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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