vela-browser-test

vela-browser-test is a skill for Claude Code from AgentiaPT/vela-slides. It costs 99 tokens per session (1,470 once invoked), scanned A, original, no licence file.

A skill for checking how Vela presentations render and handle security-sensitive content in a real web browser. Vela is the presentation system it targets.

In plain words
What is it for?
Use it to test sanitizers, investigate cross-site scripting or data-exfiltration risks, and verify whether a browser beacon fires.
Why use it?
It shows whether deck, SVG, or CSS content actually runs or sends a network request after rendering, instead of relying only on static inspection.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the vela-slides plugin — 36 skills, 2 hooks shipped together

Good fit Use it to test sanitizers, investigate cross-site scripting or data-exfiltration risks, and verify whether a browser beacon fires.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/agentiapt/vela-slides/vela-browser-test
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.

Any agent
npx skills add AgentiaPT/vela-slides --skill vela-browser-test
Clone the repo
git clone --depth 1 https://github.com/AgentiaPT/vela-slides

Made for: Claude Code.

Or install vela-slides, the plugin that ships this one along with the rest of its 36 skills, 2 hooks.

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 vela-browser-test

README.md
[![agentmods](https://agentmods.dev/badge/skills/agentiapt/vela-slides/vela-browser-test.svg)](https://agentmods.dev/skills/agentiapt/vela-slides/vela-browser-test)
Your own site
<a href="https://agentmods.dev/skills/agentiapt/vela-slides/vela-browser-test"><img src="https://agentmods.dev/badge/skills/agentiapt/vela-slides/vela-browser-test.svg" alt="Measured on agentmods" height="20"></a>
Per session 99 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,470 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00099 $0.01470
Opus 5 $0.00049 $0.00735
Sonnet 5 $0.00020 $0.00294
Haiku 4.5 $0.00010 $0.00147

Measured 8d ago against content hash caf98f318384, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

vela-browser-test scanned grade A with 1 finding 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 8d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/browser-probe.cjs, scripts/sanitizer-harness.cjs), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

which is testable with plain `curl`.
.claude/skills/vela-browser-test/SKILL.md · 96 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

2 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.

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. 8d ago First seen · 96 lines · 99 tokens per session scan A caf98f318384

Subscribe to this mod's changes

vela-browser-test is a skill published in the GitHub repository AgentiaPT/vela-slides (7 stars, last pushed yesterday), with no licence file. It adds 99 tokens to every session and 1,470 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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