arn-spark-help

arn-spark-help is a skill for Claude Code from AppsVortex/arness. It costs 123 tokens per session (2,270 once invoked), scanned A, original, MIT.

A read-only status tool for the Arness Spark exploration workflow. It checks project configuration and existing artifacts, shows the current stage, and suggests the next command.

In plain words
What is it for?
Use it to check progress through the Spark pipeline and see whether related Arness Code or Arness Infra work is also present.
Why use it?
A multi-step product exploration process can make it unclear what has already been completed or what to do next. This gives that status without changing files.

Skill for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: mentions CLAUDE.md.

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 arn-spark plugin — 28 skills, 20 agents shipped together

Good fit Use it to check progress through the Spark pipeline and see whether related Arness Code or Arness Infra work is also present.

Compare 6 skills from other repositories ↓
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 AppsVortex/arness
Claude Code
/plugin install arn-spark

Made for: Claude Code.

Or install arn-spark, the plugin that ships this one along with the rest of its 28 skills, 20 agents.

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 arn-spark-help

README.md
[![agentmods](https://agentmods.dev/badge/skills/appsvortex/arness/arn-spark-help/github.svg)](https://agentmods.dev/skills/appsvortex/arness/arn-spark-help)
Your own site
<a href="https://agentmods.dev/skills/appsvortex/arness/arn-spark-help"><img src="https://agentmods.dev/badge/skills/appsvortex/arness/arn-spark-help/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 arn-spark-help

Your own site · 80×15
<a href="https://agentmods.dev/skills/appsvortex/arness/arn-spark-help"><img src="https://agentmods.dev/badge/skills/appsvortex/arness/arn-spark-help.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 123 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,270 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 $0.00123 $0.02270
Opus 5.5 $0.00049 $0.00908
Sonnet 5.5 $0.00025 $0.00454
Haiku 4.5 $0.00012 $0.00227

Measured today against content hash 6dd2d1bb8a3d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

arn-spark-help 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 today.

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/arn-spark/skills/arn-spark-help/SKILL.md · 150 lines

How it starts

The opening of the file, as written. The whole thing — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Arness Spark Help

Detect the user's current position in the Arness Spark exploration pipeline, render a diagram with the active stage marked, and suggest the next command to run. Supports cross-plugin awareness — detects activity in Arness Code and Arness Infra and provides hints at the bottom of the output. This skill is strictly read-only — it never modifies files or project state.

Allowed tools: Read, Glob, Grep only. This skill MUST NOT use Write, Edit, Bash, or Task tools. This skill MUST NOT invoke any agents.

Workflow

Step 0: Multi-Plugin Awareness

  1. Read the project's CLAUDE.md file.
  2. Extract the ## Arness section.
  3. Detect other plugin field groups:
    • code_fields_present: true if Plans directory OR Specs directory present in ## Arness
    • infra_fields_present: true if Infra plans directory OR Infra specs directory present in ## Arness
  4. For each detected plugin, do a quick existence check (max 2 files):
    • Code: Check if <Specs directory> contains any FEATURE_*.md or BUGFIX_*.md, OR <Plans directory> has any subdirectories
    • Infra: Check if <Infra plans directory> has any subdirectories, OR if Dockerfile or docker-compose.yml exists in the project root
  5. Record { plugin_name, has_activity: bool } for each detected plugin.
  6. Proceed to Step 1. The cross-plugin hints are appended AFTER own status is rendered in Step 3.

Step 1: Load Configuration

  1. From the ## Arness section, extract Spark fields:
    • Vision directory (e.g., .arness/vision/)
    • Use cases directory (e.g., .arness/use-cases/)
    • Prototypes directory (e.g., .arness/prototypes/)
    • Spikes directory (e.g., .arness/spikes/)
    • Visual grounding directory (e.g., .arness/visual-grounding/)
    • Reports directory (e.g., .arness/reports/)

If ## Arness is missing or no Spark fields present: Show the Spark pipeline diagram with all stages unmarked. Suggest /arn-brainstorming to start a new greenfield project. Do not attempt detection.

Read the full file on GitHub · 150 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. today First seen · 150 lines · 123 tokens per session scan A 6dd2d1bb8a3d

Subscribe to this mod's changes

arn-spark-help is a skill published in the GitHub repository AppsVortex/arness (33 stars, last pushed today), licensed MIT. It adds 123 tokens to every session and 2,270 once invoked, about $0.0005 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 2026-10-25.

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