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mac:jxa-run

mac:jxa-run is a skill for Claude Code from bendrucker/claude. It costs 41 tokens per session (244 once invoked), scanned A, original, MIT.

A skill for running JavaScript for Automation scripts against a named macOS application. JXA is a JavaScript-based way to control supported Mac applications through system automation.

In plain words
What is it for?
Use it to execute a JXA expression or script file with an application name and pass additional command-line arguments to the script.
Why use it?
It checks that the script is scoped to the intended application before running it, reducing the chance of using automation against the wrong app.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: positional $N argument.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the mac plugin — 2 skills shipped together

not rated 18repo changed 10d ago A scan 41 tokens original MIT

Good fit Use it to execute a JXA expression or script file with an application name and pass additional command-line arguments to the script.

Compare 6 skills from other repositories ↓
View source ↗ bendrucker/claude
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add bendrucker/claude
Claude Code
/plugin install mac

Made for: Claude Code.

Or install mac, the plugin that ships this one along with the rest of its 2 skills.

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 mac:jxa-run

README.md
[![agentmods](https://agentmods.dev/badge/skills/bendrucker/claude/jxa-run/github.svg)](https://agentmods.dev/skills/bendrucker/claude/jxa-run)
Your own site
<a href="https://agentmods.dev/skills/bendrucker/claude/jxa-run"><img src="https://agentmods.dev/badge/skills/bendrucker/claude/jxa-run/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.

agentmods 80×15 button for mac:jxa-run

Your own site · 80×15
<a href="https://agentmods.dev/skills/bendrucker/claude/jxa-run"><img src="https://agentmods.dev/badge/skills/bendrucker/claude/jxa-run.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 244 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.
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 $0.00041 $0.00244
Opus 5.5 $0.00016 $0.00098
Sonnet 5.5 $0.00008 $0.00049
Haiku 4.5 $0.00004 $0.00024

Measured 10d ago against content hash 5df80781c851, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mac:jxa-run 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 10d 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.

plugins/mac/skills/jxa-run/SKILL.md · 24 lines

What it actually says

Run JXA

Run the JXA expression or script file from the arguments. $0 is the app name. Runner flags (-e) go before the script path. Every argument after the script path passes to the script unchanged, its own flags included.

bun ${CLAUDE_PLUGIN_ROOT}/scripts/jxa.ts $ARGUMENTS
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. 10d ago Changed · -1 lines 5df80781c851
  2. 2mo ago Changed · -1 lines 901a4d109888
  3. 2mo ago First seen · 26 lines · 41 tokens per session scan A afb6336375d7

Subscribe to this mod's changes

mac:jxa-run is a skill published in the GitHub repository bendrucker/claude (18 stars, last pushed today), licensed MIT. It adds 41 tokens to every session and 244 once invoked, about $0.0002 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.

Claude Codeclaude-code-plugin
Related

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