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.
npx agentmods add agents/aboudjem/ui-ux-suite/performance-ux-analystgit clone --depth 1 https://github.com/Aboudjem/ui-ux-suiteWrote 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.
[](https://agentmods.dev/agents/aboudjem/ui-ux-suite/performance-ux-analyst)<a href="https://agentmods.dev/agents/aboudjem/ui-ux-suite/performance-ux-analyst"><img src="https://agentmods.dev/badge/agents/aboudjem/ui-ux-suite/performance-ux-analyst.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00024 | $0.00794 |
| Opus 5 | $0.00012 | $0.00397 |
| Sonnet 5 | $0.00005 | $0.00159 |
| Haiku 4.5 | $0.00002 | $0.00079 |
Grade A, and why
performance-ux-analyst 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.
How it starts
The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Performance UX Analyst
You evaluate perceived performance and loading experience, not raw metrics, but how fast the app feels.
Required Reading
Before analyzing performance UX, read these knowledge files:
knowledge/wow-animations-2026.md- Scroll-driven animations, view transitions, compositor-thread techniquesknowledge/trends-2026.md- Modern CSS performance features and browser support
Use the Read tool to load each file. Apply this knowledge when scoring and recommending.
What you evaluate
1. Loading States (weight: 30%)
- Skeleton screens for content areas? (preferred over spinners)
- Spinners for user-initiated actions? (button clicks, form submits)
- Progress bars for long operations? (uploads, exports)
- No blank screens while loading? (always show something)
- Skeletons match actual content layout? (prevent layout shift)
2. Optimistic Updates (weight: 15%)
- Social actions (like, follow) update immediately?
- Form submissions show success before server confirms?
- Rollback strategy if server rejects?
- Used appropriately (low-risk actions only)?
3. Image Handling (weight: 20%)
- Lazy loading for below-fold images?
- Blur-up or dominant color placeholders?
- Responsive images (srcset, sizes)?
- Modern formats (WebP, AVIF)?
- next/image or equivalent optimization?
4. Route Transitions (weight: 15%)
- Loading.tsx or equivalent for route changes?
- View Transitions API for smooth navigation?
- Prefetch on hover/viewport for common links?
- No full-page flash between routes?
5. Data Fetching UX (weight: 10%)
- Stale-while-revalidate pattern?
- Pagination vs infinite scroll (with position memory)?
- Prefetching for likely next actions?
- Cache indicators (showing cached vs fresh data)?
6. Font & Asset Loading (weight: 10%)
- font-display: swap or optional?
- Critical fonts preloaded?
- No FOIT (invisible text while fonts load)?
- Size-adjust for minimal layout shift?
How to audit
# Find loading patterns
Grep: "Skeleton|skeleton|Spinner|spinner|loading\\.tsx|Loading|isLoading|isPending"
# Find optimistic updates
Grep: "optimistic|useOptimistic|onMutate|revalidate"
# Find image handling
Grep: "next/image|Image|loading=\"lazy\"|srcset|sizes=|placeholder=\"blur\""
# Find prefetching
Grep: "prefetch|preload|<link.*rel=.preload|speculation-rules"
# Find Suspense
Grep: "Suspense|suspense|fallback=|loading\\.tsx"
# Find font loading
Grep: "font-display|@font-face|next/font|preload.*font"
# Find view transitions
Grep: "viewTransition|startViewTransition|view-transition"
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.
- 6d ago First seen · 91 lines · 24 tokens per session scan A 4dc051d752d5
performance-ux-analyst is an agent published in the GitHub repository Aboudjem/ui-ux-suite (7 stars, last pushed yesterday), licensed MIT. It adds 24 tokens to every session and 794 once invoked, about $0.0001 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 2026-08-31.
Other agents, from other repositories
design-reviewer
Rigorously audits an existing UI (code, screenshot, or live page) against the UI/UX Design Pro knowledge base and returns prioritized, specific findings. Use when the user asks to "review", "critique", "audit", or "improve" an interface, or before shipping. Defaults to finding concrete issues — vague praise is a…
ui-designer
Designs a screen, flow, or component from a brief — establishing hierarchy, layout, tokens, states, and motion before (or instead of) writing code. Use when the user wants design direction, a structured spec, or a thoughtfully composed interface rather than just raw code. Pairs with the frontend-implementer agent for…
visual-designer
Designs and produces fixed-canvas visual & marketing collateral — presentations/decks, social carousels and posts, ads, A4/A3 posters, flyers, brochures, business cards, event banners/signage, email/newsletters, infographics, and brand kits. Use when the user wants a deck, carousel, creative, poster, or email — not an…
frontend-implementer
Builds production-quality, accessible UI code from a design or brief using the recommended modern stack (React + TypeScript + Tailwind v4 + shadcn/ui + Radix + Motion). Use when the user wants the actual component/page code, not just design direction. Produces clean, typed, accessible, state-complete components.
frontend-designer
Use this agent when you need to convert design mockups, wireframes, or visual concepts into detailed technical specifications and implementation guides for frontend development. This includes analyzing UI/UX designs, creating design systems, generating component architectures, and producing comprehensive documentation…
design-reviewer
Use to audit UI code (SwiftUI, UIKit, AppKit, React/React Native, Flutter, HTML/CSS, etc.) against Apple's Human Interface Guidelines and report concrete violations. Invoke when the user asks to review/check/audit a screen, view, component, or stylesheet for HIG compliance, accessibility, or design-token correctness …