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.
/plugin marketplace add austinfox/claude-pluginsnpx agentmods add plugins/austinfox/claude-plugins/tax-advisorgit clone --depth 1 https://github.com/austinfox/claude-pluginsGrade A, and why
tax-advisor 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 3d 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.
What it actually says
{
"name": "tax-advisor",
"version": "1.2.0",
"description": "Source-backed US tax advisor with Washington, California, and US–Sweden cross-border guidance, including foreign tax credit and international reporting",
"author": {
"name": "Austin Fox"
},
"license": "MIT",
"keywords": [
"tax",
"irs",
"washington-state",
"california",
"sweden",
"foreign-tax-credit",
"international-tax",
"expat-tax",
"tax-planning",
"tax-strategy",
"estimated-taxes",
"capital-gains",
"self-employment",
"retirement",
"hsa"
],
"skills": ["./skills/tax-advisor"],
"commands": ["./commands/tax-advisor.md"],
"agents": [
"./agents/tax-situation-analyzer.md",
"./agents/tax-document-reviewer.md",
"./agents/tax-strategy-explorer.md",
"./agents/tax-quarterly-estimator.md"
]
}
What it installs
The manifest is a name and a version. 1 skill, 1 command, 4 agents travel with it, and installing the plugin installs all of them — 183 tokens a session between them. Each is measured on its own page, and each can be installed alone.
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.
- 3d ago First seen · 35 lines scan A 24a65c522661
tax-advisor is a plugin published in the GitHub repository austinfox/claude-plugins (4 stars, last pushed 1mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-08-31.
Other plugins, from other repositories
insolvenssi
Suomen insolvenssioikeus: maksukyvyttömyystilanteen arviointi ja menettelyn valinta (konkurssi, yrityssaneeraus, velkajärjestely), konkurssimenettely velkojan ja velallisen näkökulmasta sekä saatavien perintä, vanhentuminen ja ulosotto.
accountant
Draft tax return summaries, tax-planning memos, engagement letters, and IRS notice responses with current-law and practice-boundary guardrails.
shinkoku
確定申告を自動化する Claude Code Plugin。会社員＋副業（事業所得・青色申告）の所得税・消費税確定申告をエンドツーエンドで支援。.
bankrecht
Bank- und Kapitalmarktrecht (Fachanwaltschaft). Kreditvertragsprüfung, Verbraucherdarlehen §§ 491 ff. BGB, Anlageberatung WpHG, MiFID II, Bauspar-/Hypothekenrecht.
global-database
Company profiles, financials, ownership, digital insights, people search and contact enrichment, prospecting and KYB/compliance lookups against official government registries. Users sign in through a browser OAuth flow with their Global Database API key — no credentials are configured in the client.
arc-ledger-irs
Read-only US tax reference tools and procedural Skills for understanding IRS notices, estimating selected penalties, and screening general resolution paths. General information only.