Borrowing it
Nothing to install: this file belongs to loonghao/auroraview. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/loonghao/auroraview/main/.agents/skills/vx-usage/SKILL.mdgit clone --depth 1 https://github.com/loonghao/auroraviewWrote 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/loonghao/auroraview/vx-usage)<a href="https://agentmods.dev/skills/loonghao/auroraview/vx-usage"><img src="https://agentmods.dev/badge/skills/loonghao/auroraview/vx-usage/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/loonghao/auroraview/vx-usage"><img src="https://agentmods.dev/badge/skills/loonghao/auroraview/vx-usage.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00081 | $0.02454 |
| Opus 5.5 | $0.00032 | $0.00982 |
| Sonnet 5.5 | $0.00016 | $0.00491 |
| Haiku 4.5 | $0.00008 | $0.00245 |
Grade A, and why
vx-usage 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 1mo 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 — 334 lines — stays where its author put it; the contents beside it link to each section on GitHub.
VX - Universal Development Tool Manager
vx is a universal development tool manager that automatically installs and manages development tools (Node.js, Python/uv, Go, Rust, etc.) with zero configuration.
Core Concept
Instead of requiring users to manually install tools, prefix any command with vx:
vx node --version # Auto-installs Node.js if needed
vx uv pip install x # Auto-installs uv if needed
vx go build . # Auto-installs Go if needed
vx cargo build # Auto-installs Rust if needed
vx just test # Auto-installs just if needed
vx is fully transparent - same commands, same arguments, just add vx prefix.
Essential Commands
Tool Execution (most common)
vx <tool> [args...] # Run any tool (auto-installs if missing)
vx node app.js # Run Node.js
vx python script.py # Run Python (via uv)
vx npm install # Run npm
vx npx create-react-app app # Run npx
vx cargo test # Run cargo
vx just build # Run just (task runner)
vx git status # Run git
Tool Management
vx install node@22 # Install specific version
vx install uv go rust # Install multiple tools at once
vx list # List all available tools
vx list --installed # List installed tools only
vx versions node # Show available versions
vx switch node@20 # Switch active version
vx uninstall [email protected] # Remove a version
Project Management
vx init # Initialize vx.toml for project
vx sync # Install all tools from vx.toml
vx setup # Full project setup (sync + hooks)
vx dev # Enter dev environment with all tools
vx run test # Run project scripts from vx.toml
vx check # Verify tool constraints
vx lock # Generate vx.lock for reproducibility
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.
- 1mo ago First seen · 334 lines · 81 tokens per session scan A 6a28a7a342bc
vx-usage is a skill published in the GitHub repository loonghao/auroraview (47 stars, last pushed 24d ago), licensed MIT. It adds 81 tokens to every session and 2,454 once invoked, about $0.0003 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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