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 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/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.
<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="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
- Socket pass
- Snyk warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Excessive Agency · line 503 Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
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 | $0.00125 | $0.07067 |
| Opus 5.5 | $0.00050 | $0.02827 |
| Sonnet 5.5 | $0.00025 | $0.01413 |
| Haiku 4.5 | $0.00013 | $0.00707 |
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 — 597 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.
For a specific task/object link handoff, select state and journey for that destination, including authoritative machine and run/job identity when titles repeat. Keep the audit bounded to the promised destination.
For a website/document converted to Markdown, or an illustrated transcript/note consumed in Obsidian or another named reader, load references/markdown-reader-handoff.md before judging figure readability. Compare the complete source figure with its actual document reading canvas, including HTML captions and SVG/CSS dependencies. For oversized embedded images, use its display-size recipe and test a representative long image with the adjacent text before applying the same layout to the document.
What ships with it
42 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.
- assets/markdown-reader-pilot/source.html 3.4 KB
- evals/evals.json 59 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/nested-source-return-fixture.html 3.5 KB
- evals/files/result-consumption-authority.json 5.3 KB
- evals/files/result-consumption-fixture.html 12 KB
- evals/files/route-state-fixture.html 4.6 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 4.8 KB
- references/auth-session-and-environment-traps.md 7.9 KB
- references/browser-driving-and-observation-traps.md 31 KB
- references/data_viz_tier_and_token_audit.md 7.8 KB
- references/delivery-verification.md 5.6 KB
- references/history-derived-checklist.md 17 KB
- references/journey-and-page-contracts.md 33 KB
- references/markdown-reader-handoff.md 6.7 KB
- references/markdown-reader-pilot.md 6.2 KB
- references/reference-parity-decomposition.md 12 KB
- references/silent-degradation-and-evidence.md 17 KB
- scripts/attention_inventory.mjs 4.5 KB runs code
- scripts/journey_input.mjs 1.3 KB runs code
- scripts/painted_text_probe.mjs 3.2 KB runs code
- scripts/silent_degradation_probe.mjs 18 KB runs code
- scripts/verify_delivery.py 9.4 KB runs code
- scripts/visual_layout_audit.mjs 91 KB runs code
- tests/test_attention_inventory.mjs 3.8 KB runs code
- tests/test_journey_input.mjs 2.4 KB runs code
- tests/test_nested_source_return.mjs 6.7 KB runs code
- tests/test_painted_text_probe.mjs 3.5 KB runs code
- tests/test_result_consumption_fixture.py 8.3 KB runs code
- tests/test_silent_degradation_probe.mjs 12 KB runs code
- tests/test_verify_delivery.py 11 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 Changed · +2 lines afd3baf6780f
- 5d ago Changed · +9 lines · +18 tokens per session 8c3194c8746a
- 8d ago Changed · +2 lines fbbb7b1bda2a
- 9d ago Changed · +5 lines 51a6533d9ba7
- 10d ago Changed · +11 lines 72d2a84c3e78
- 11d ago Changed · +10 lines · +8 tokens per session 6032fddf397f
- 12d ago Changed · +6 lines 98914bc538d3
- 14d ago Changed · +8 lines a2e7a960b2ad
- 26d ago Changed · -3 lines · -46 tokens per session 92e91d9b0d79
- 1mo ago First seen · 547 lines · 145 tokens per session scan A 8b7b77f74f40
frontend-visual-qa is a skill published in the GitHub repository daymade/claude-code-skills (1,477 stars, last pushed today), licensed MIT. It adds 125 tokens to every session and 7,067 once invoked, about $0.0005 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 2026-09-03.
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