vopen

vopen is a skill for Claude Code from vlinx-io/VelaTerm. It costs 100 tokens per session (673 once invoked), scanned A, original, MIT.

A command for opening a file or web address in the centre pane of the vlx-term terminal application. It chooses a suitable viewer, such as a formatted editor for Markdown, an image viewer, or a code editor with syntax highlighting.

In plain words
What is it for?
Use it to open existing files, images, source code, Markdown documents, or HTTP and HTTPS URLs.
Why use it?
It provides one way to open different kinds of documents without manually choosing an application or editor.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions Codex.

Good fit Use it to open existing files, images, source code, Markdown documents, or HTTP and HTTPS URLs.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/vlinx-io/velaterm/vopen
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 vlinx-io/VelaTerm --skill vopen
Clone the repo
git clone --depth 1 https://github.com/vlinx-io/VelaTerm

Made for: Claude Code.

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 vopen

README.md
[![agentmods](https://agentmods.dev/badge/skills/vlinx-io/velaterm/vopen.svg)](https://agentmods.dev/skills/vlinx-io/velaterm/vopen)
Your own site
<a href="https://agentmods.dev/skills/vlinx-io/velaterm/vopen"><img src="https://agentmods.dev/badge/skills/vlinx-io/velaterm/vopen.svg" alt="Measured on agentmods" height="20"></a>
Per session 100 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 673 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original 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 $0.00100 $0.00673
Opus 5 $0.00050 $0.00336
Sonnet 5 $0.00020 $0.00135
Haiku 4.5 $0.00010 $0.00067

Measured 8d ago against content hash 7c9d216523ac, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

vopen 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 8d 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.

skills/vopen/SKILL.md · 58 lines

How it starts

The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/vopen

The user explicitly invoked /vopen (Claude) or $vopen (Codex) to request opening a file or URL in the vlx-term center pane, with exactly the same effect as typing vopen <file> in the terminal: it opens a document tab in the center pane, routed automatically by type (markdown WYSIWYG / image viewer / code editor with syntax highlighting), while http/https URLs open a built-in browser tab. The document tab sits alongside the terminal tabs and won't displace the current session.

User input:

$ARGUMENTS

Step 1: Resolve the user input into concrete paths

  • What the user gives may be a literal path or URL, or a reference (e.g. "the file I just edited," "the architecture doc") — resolve references into real file paths from the current conversation context; when unsure, ask first rather than guessing a path to open.
  • Multiple items can be opened at once; resolve each one.
  • Always convert to an absolute path before passing it to the command (the Bash tool's working directory isn't necessarily the "current directory" the user has in mind; absolute paths are the most reliable). Pass URLs (http/https) through as-is.
  • The file must already exist; vopen only accepts regular files, not directories.

Step 2: Run the command

Run vopen from PATH (each path/URL as a separate argument; mind escaping of spaces and other special characters):

vopen <absolute path or url>...

On success it prints a confirmation for each opened item; on failure (file doesn't exist or isn't a regular file) it exits non-zero and reports which file on stderr.

Step 3: Report back to the user

On success, give a one-line summary: "Opened in vlx-term: "; on failure, report the failed file and the reason honestly.

Notes

  • Must run inside a vlx-term-hosted local session: it relies on the injected VLX_* environment variables and the vopen script on PATH; if missing it reports "not inside a vlx-term session" — in that case just tell the user this skill is only available inside vlx-term sessions, and don't try other ways to open it.
  • Not available inside claude-remote remote sessions (a remote can't reach the local machine's hook port).

Read the full file on GitHub · 58 lines

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 · 58 lines · 100 tokens per session scan A 7c9d216523ac

Subscribe to this mod's changes

vopen is a skill published in the GitHub repository vlinx-io/VelaTerm (116 stars, last pushed 2d ago), licensed MIT. It adds 100 tokens to every session and 673 once invoked, about $0.0005 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 2026-08-30.

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