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check-name

check-name is a skill for Claude Code from mayank-io/mstack. It costs 66 tokens per session (1,335 once invoked), scanned B, original, MIT.

A name-checking skill that searches business names across US trademark records, Washington state registrations, and major domain endings.

In plain words
What is it for?
It is for checking candidate names for trademarks, Washington companies, and domains, with optional trademark-class filters and JSON output.
Why use it?
It brings several availability checks into one report before you file a company or choose a brand name.

Skill for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: names the AskUserQuestion tool; built for gstack.

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 company-setup plugin — 1 skill shipped together

not rated 6repo +1 3d ago B scan 66 tokens original MIT

Good fit It is for checking candidate names for trademarks, Washington companies, and domains, with optional trademark-class filters and JSON output.

Compare 6 skills from other repositories ↓
View source ↗ mayank-io/mstack
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 mayank-io/mstack
Claude Code
/plugin install company-setup

Made for: Claude Code.

Or install company-setup, the plugin that ships this one along with the rest of its 1 skill.

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 check-name

README.md
[![agentmods](https://agentmods.dev/badge/skills/mayank-io/mstack/check-name/github.svg)](https://agentmods.dev/skills/mayank-io/mstack/check-name)
Your own site
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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 check-name

Your own site · 80×15
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Per session 66 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,335 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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 $0.00066 $0.01335
Opus 5.5 $0.00026 $0.00534
Sonnet 5.5 $0.00013 $0.00267
Haiku 4.5 $0.00007 $0.00134

Measured 2mo ago against content hash 8412246838e3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

check-name scanned grade B 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 2mo 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.

Enumerates other installed skillsmediumAgent snooping

Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.

ls "$HOME/.claude/skills/gstack/browse/dist/browse" && echo READY || echo MISSING
plugins/company-setup/skills/check-name/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Check Name Availability

Run an aggregated availability sweep on a candidate company name across three sources and produce a single markdown report. The report drives a real filing decision — accuracy over speed.

When to invoke

The user asks any of:

  • "Is <name> available?"
  • "Can I file <name> as an LLC?"
  • "Check trademark on <name>"
  • "Is <name>.com taken?"
  • "Run availability checks on <name>"
  • "Clear <name> for me"

Arguments

Parse from $ARGUMENTS:

  • Candidate name (positional, required) — the bare candidate. Can be one or more words. Quote if it contains spaces.
  • --systems <csv> (optional) — subset of uspto,wa-sos,domain. Default: all three.
  • --class <csv> (optional) — USPTO class filter, e.g. 35,42. Default: pick from business context (see below).
  • --json (optional) — emit machine-readable JSON instead of markdown.
  • --refresh (optional) — bypass cache.

If the candidate name is missing or ambiguous, ask the user before invoking.

Picking USPTO classes (do this before running)

The user usually doesn't know Nice Classification — pick the classes for them, announce, run.

Procedure:

  1. If --class was explicitly provided, use it verbatim. No question.
  2. Otherwise, infer the business archetype. Check the recent conversation for cues:
    • "fractional CTO firm", "tech consulting", "advisory" → IT consulting archetype
    • "SaaS", "platform", "app" → SaaS archetype
    • "store", "DTC", "brand" → e-commerce archetype
    • "restaurant", "café", "bar" → food service archetype
    • "coaching", "training", "course" → education archetype
    • (etc.)
  3. Look up the matching class set in ${CLAUDE_PLUGIN_ROOT}/playbooks/uspto-nice-classes.md (the "Business archetype → class map" table is the lookup).
  4. Announce the choice in ONE LINE before running. Example:

    Searching USPTO classes 35 (business consulting) and 42 (IT consulting) — standard for a fractional CTO firm. Override with /check-name <name> --class X,Y if you want different scope.

  5. If you can't infer the archetype from context AND the user hasn't told you, ask ONCE with AskUserQuestion. The options should be drawn from the archetype map. Don't dump the full 45-class taxonomy — give 4 archetypes max plus "Other (describe)".
  6. Run with the picked --class.

Read the full file on GitHub · 103 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. 2mo ago First seen · 103 lines · 66 tokens per session scan B 8412246838e3

Subscribe to this mod's changes

check-name is a skill published in the GitHub repository mayank-io/mstack (6 stars, last pushed 3d ago), licensed MIT. It adds 66 tokens to every session and 1,335 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it B with 1 finding (enumerates other installed skills). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Legal and complianceMarketing and SEO
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