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arn-infra-doctor

arn-infra-doctor is an agent for Claude Code from AppsVortex/arness. It costs 271 tokens per session (1,193 once invoked), scanned A, original, MIT.

A diagnostic assistant for Arness infrastructure workflows. It checks project configuration, expected directories and files, and workflow behavior against documented patterns.

In plain words
What is it for?
Use it to investigate infrastructure workflow problems and identify missing configuration, directories, files, or incorrect patterns.
Why use it?
It helps explain why an infrastructure workflow is not behaving as expected by checking both its settings and its supporting files.

Agent for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: model in frontmatter; mentions .claude-plugin; 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-infra plugin — 25 skills, 10 agents shipped together

not rated 33repo yesterday A scan 271 tokens original MIT

Good fit Use it to investigate infrastructure workflow problems and identify missing configuration, directories, files, or incorrect patterns.

Compare 6 agents from other repositories ↓
View source ↗ AppsVortex/arness arness.appsvortex.com
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-infra

Made for: Claude Code.

Or install arn-infra, the plugin that ships this one along with the rest of its 25 skills, 10 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-infra-doctor

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/appsvortex/arness/arn-infra-doctor"><img src="https://agentmods.dev/badge/agents/appsvortex/arness/arn-infra-doctor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 271 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,193 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 $0.00271 $0.01193
Opus 5.5 $0.00108 $0.00477
Sonnet 5.5 $0.00054 $0.00239
Haiku 4.5 $0.00027 $0.00119

Measured yesterday against content hash 6ab9a44fe41b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

arn-infra-doctor 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 yesterday.

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-infra/agents/arn-infra-doctor.md · 106 lines

How it starts

The opening of the file, as written. The whole thing — 106 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Arness Infra Doctor

Arness Infra workflow diagnostic specialist. Analyzes a project's Arness Infra state against expected patterns to identify infrastructure workflow issues.

Input

Provided by the calling skill (arn-infra-report):

  • User's description of the issue
  • Project root path
  • ## Arness config from CLAUDE.md (if it exists)
  • Plugin version

Procedure

  1. Read the Arness Infra knowledge base at ${CLAUDE_PLUGIN_ROOT}/skills/arn-infra-report/references/infra-knowledge-base.md
  2. Based on the user's description, identify which skill(s) are involved
  3. Run targeted checks based on the involved skill(s):
    • Config checks: Read CLAUDE.md, verify ## Arness section has all required fields for the skill in question (Infra plans directory, Infra specs directory, Providers, Providers config, Environments, Environments config, Default IaC tool, Project topology, Tooling manifest, Resource manifest, Cost threshold, CI/CD platform, Git, Platform, Issue tracker)
    • Directory checks: Verify expected directories exist (infra plans dir, infra specs dir, infra docs dir, infra templates dir, .arness/infra/)
    • File checks: Verify expected files exist (providers.md, environments.md, tooling-manifest.json, active-resources.json, template JSONs, checksums, PROGRESS_TRACKER.json, phase plans, phase reports)
    • Tooling checks: Check availability of IaC tools (terraform/tofu/pulumi), Docker, cloud CLIs (aws/gcloud/az), kubectl, helm
    • Git checks: If git-related, run git status, check remotes
    • Platform checks:

      If Platform is github:

      • Run gh auth status — verify GitHub CLI is authenticated

      If Platform is bitbucket:

      • Run bkt --version — verify bkt CLI is installed
      • Run bkt auth status — verify authentication is valid

      If Platform is none:

      • No platform-specific checks needed
    • Cloud auth checks: If deployment or provider related, verify cloud CLI authentication state
  4. Compare findings against expected behavior documented in the knowledge base
  5. Produce a diagnostic report (see Output Format)

Read the full file on GitHub · 106 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. yesterday First seen · 106 lines · 271 tokens per session scan A 6ab9a44fe41b

Subscribe to this mod's changes

arn-infra-doctor is an agent published in the GitHub repository AppsVortex/arness (33 stars, last pushed yesterday), licensed MIT. It adds 271 tokens to every session and 1,193 once invoked, about $0.0011 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.

Claude CodeCloudDebuggingDevOps and cloudai-workflowsclaude-code-plugindeveloper-toolsinfrastructure-as-codemcp
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