vibemon-app: Skill for Claude Code

.claude/skills/run-desktop/SKILL.md

run-desktop is a skill for Claude Code from opspresso/vibemon-app. It costs 69 tokens per session (1,444 once invoked), scanned A, original, MIT.

A workflow for running and controlling VibeMon, a tray-based Electron desktop app that displays a character and supports 2D and 3D engines. It provides commands for launching the app, changing its state, switching engines, and taking screenshots.

In plain words
What is it for?
Use it to start VibeMon, display or lock a character, switch between 2D and 3D, inspect logs, and capture the app window for visual checks.
Why use it?
It makes the app testable through repeatable commands instead of relying on manual desktop interaction. Isolated app settings and screenshots make checks safer and easier to review.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: reads .claude/ paths; mentions Claude Code; mentions Codex.

This is opspresso/vibemon-app's own configuration. It tells Claude Code how to work on vibemon-app itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything vibemon-app configures →

Reuse

Borrowing it

Nothing to install: this file belongs to opspresso/vibemon-app. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/opspresso/vibemon-app/main/.claude/skills/run-desktop/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/opspresso/vibemon-app

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 run-desktop

README.md
[![agentmods](https://agentmods.dev/badge/skills/opspresso/vibemon-app/run-desktop.svg)](https://agentmods.dev/skills/opspresso/vibemon-app/run-desktop)
Your own site
<a href="https://agentmods.dev/skills/opspresso/vibemon-app/run-desktop"><img src="https://agentmods.dev/badge/skills/opspresso/vibemon-app/run-desktop.svg" alt="Measured on agentmods" height="20"></a>
Per session 69 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,444 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
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 Data Exfiltration · line 61
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
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 $0.00069 $0.01444
Opus 5 $0.00034 $0.00722
Sonnet 5 $0.00014 $0.00289
Haiku 4.5 $0.00007 $0.00144

Measured 7d ago against content hash 25714a56fb87, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

run-desktop 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 7d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (driver.mjs), 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.

curl -X POST http://127.0.0.1:19280/status -H 'Content-Type: application/json' \
.claude/skills/run-desktop/SKILL.md · 110 lines

How it starts

The opening of the file, as written. The whole thing — 110 lines — stays where its author put it; the contents beside it link to each section on GitHub.

VibeMon is a tray-only Electron app: pnpm start shows no window, because the character window is created on demand by a POST /status to its local HTTP server. For agent use, drive it through .claude/skills/run-desktop/driver.mjs — a zero-dependency driver that speaks the Chrome DevTools Protocol over Node's built-in WebSocket (Node >= 22, no npm install, no tmux).

The driver always launches with an isolated --user-data-dir, so a run never touches the developer's real settings in ~/Library/Application Support/vibemon.

Run (agent path)

One shot: pass the commands as arguments. They run in order, the app is closed at the end, and the exit code is non-zero if any command failed.

node .claude/skills/run-desktop/driver.mjs \
  "launch 3d" "lock codex" "status working" "engine" "ss codex-3d" "logs"

Then open the PNG and look at it. Screenshots land in /tmp/vibemon-shots/ (override with SCREENSHOT_DIR).

Run it with no arguments for an interactive driver> REPL instead (same commands, quit to exit).

The real app must not be running — it owns port 19280, and launch fails fast with a clear error if the port is taken.

Commands

command what it does
launch [2d|3d] seed the render mode, boot the app, wait for its HTTP server
status <state> [character] [project] POST /status → creates/updates the character window, waits for it
lock <character|auto> POST /character-lock — pins the character against other bridges
focus what the window is actually showing (focused project / character / state)
ss [name] screenshot over an opaque backdrop, prints focus alongside
ss-raw [name] screenshot the true transparent frame
engine which engine booted: vibemon-canvas (2D) vs vibemon-canvas-3d (WebGL)
page <character|bubble> retarget commands at the character window or the speech bubble
windows list open windows
eval <js> / text [sel] evaluate in the page / dump innerText
wait <ms> pause the sequence (e.g. to let an animation settle)
logs renderer console, uncaught errors, CSP violations, and main-process output since launch
quit close the app (implicit at the end of a one-shot run)

Read the full file on GitHub · 110 lines

Files

What ships with it

1 file 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. 7d ago First seen · 110 lines · 69 tokens per session scan A 25714a56fb87

Subscribe to this mod's changes

run-desktop is a skill published in the GitHub repository opspresso/vibemon-app (23 stars, last pushed 13d ago), licensed MIT. It adds 69 tokens to every session and 1,444 once invoked, about $0.0003 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 2026-08-30.

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