Claude Code Skills Marketplace is a collection and marketplace of skills, plugins, agents, and instructions that extend Claude Code with specialized development workflows. It is for developers who want to install existing workflows or create, validate, and package their own Claude Code skills.
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 skills/daymade/claude-code-skills/frontend-visual-qanpx skills add daymade/claude-code-skills --skill frontend-visual-qagit clone --depth 1 https://github.com/daymade/claude-code-skillsWrote 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/skills/daymade/claude-code-skills/frontend-visual-qa)<a href="https://agentmods.dev/skills/daymade/claude-code-skills/frontend-visual-qa"><img src="https://agentmods.dev/badge/skills/daymade/claude-code-skills/frontend-visual-qa.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 | $0.00145 | $0.06078 |
| Opus 5 | $0.00072 | $0.03039 |
| Sonnet 5 | $0.00029 | $0.01216 |
| Haiku 4.5 | $0.00015 | $0.00608 |
Grade A, and why
frontend-visual-qa 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 yesterday.
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 — 533 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend Visual QA
Audit the interface the user can actually see. Treat build success, DOM presence, and uninspected screenshot files as supporting signals, never as visual proof.
Default to audit-only. Do not edit implementation, add tests, install dependencies, or update snapshots unless the user explicitly asks to fix or change the UI. Permission to fix source does not authorize rebuilding, restarting, or deploying any target.
Scope And Routing
Use this skill only after a rendered artifact exists. Select the smallest audit profile that covers the request:
- core visual — composition, typography, spacing, wrapping, clipping, images;
- responsive — breakpoints, reflow, mobile alternatives, scroll ownership;
- state and journey — conditional branches, transitions, recovery, routes;
- browser output — download, share, clipboard, popup, file dialog, print, PDF;
- native shell — Electron or hybrid chrome, permissions, drag regions, IPC UI;
- page contract — dashboard/admin, landing/deck, design-system artifact, browser tool/game, map/GIS, or review tool;
- reference parity — comparison with a named screenshot, product, or tier;
- data visualization — chart hierarchy, tokens, semantics, and accessibility.
Combine profiles only when the changed surface or the user requests a broad release review. Do not force a local line-break review through unrelated auth, map, export, and native-shell checks.
Use adjacent skills by stage:
- Use ui-designer, frontend-design, or another design skill to derive or create a visual direction.
- Use this skill to test the already-rendered result.
- Use qa-expert for a full test strategy, defect program, and release metrics.
- Use both this skill and qa-expert only when rendered visual evidence is one part of a broader QA gate.
- This skill audits whether an artifact renders correctly, not whether it communicates. A page can pass every check here while its labels are opaque internal abbreviations and its numbers contradict each other between sections. Route copy, terminology and audience fit to a content/writing-discipline skill, and never let a green visual pass be reported as "a first-time reader can follow this" — that is a different question, answered by a reader, not by a rendering.
What ships with it
26 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- .security-scan-passed 187 B
- evals/evals.json 30 KB
- evals/files/browser-output-fixture.html 1.5 KB
- evals/files/data-viz-reference.html 1.4 KB
- evals/files/data-viz-target.html 1.1 KB
- evals/files/dead-affordance-fixture.html 4.4 KB
- evals/files/deck-fixture.html 2.3 KB
- evals/files/focus-and-motion-fixture.html 1.8 KB
- evals/files/gis-fixture.html 1.3 KB
- evals/files/layout-defects.html 1.4 KB
- evals/files/lazy-responsive-media-fixture.html 2.7 KB
- evals/files/route-state-fixture.html 1.4 KB
- evals/files/script-evidence-edge-cases.html 2.1 KB
- evals/files/static-review.png 34 KB
- evals/files/transient-fixture.html 866 B
- evals/trigger-evals.json 4.5 KB
- references/auth-session-and-environment-traps.md 7.9 KB
- references/browser-driving-and-observation-traps.md 22 KB
- references/data_viz_tier_and_token_audit.md 7.8 KB
- references/history-derived-checklist.md 12 KB
- references/journey-and-page-contracts.md 15 KB
- references/reference-parity-decomposition.md 12 KB
- references/silent-degradation-and-evidence.md 17 KB
- scripts/silent_degradation_probe.mjs 18 KB runs code
- scripts/visual_layout_audit.mjs 90 KB runs code
- tests/test_silent_degradation_probe.mjs 12 KB runs code
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.
- yesterday First seen · 533 lines · 145 tokens per session scan A 48531a3c77bd
frontend-visual-qa is a skill published in the GitHub repository daymade/claude-code-skills (1,375 stars, last pushed yesterday), licensed MIT. It adds 145 tokens to every session and 6,078 once invoked, about $0.0007 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 2026-09-03.
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