voice-checker

voice-checker is an agent for Claude Code from animalzinc/claude-plugins. It costs 47 tokens per session (539 once invoked), scanned A, original, MIT.

An article reviewer that checks whether a piece matches a brand's defined voice, such as its tone, persona, confidence, and use of people words like “we” or “you.” It bases findings on the supplied voice rules.

In plain words
What is it for?
Use it to review an article's tone, evidence style, audience address, and consistency with a brand voice guide.
Why use it?
A technically correct article can still sound unlike the organisation publishing it. This identifies meaningful shifts in tone or register without relying on general preferences.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter.

Part of the blog-style-guide-creator plugin — 4 skills, 2 commands, 11 agents shipped together

Good fit Use it to review an article's tone, evidence style, audience address, and consistency with a brand voice guide.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/animalzinc/claude-plugins/voice-checker
Install

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.

Clone the repo
git clone --depth 1 https://github.com/animalzinc/claude-plugins

Made for: Claude Code.

Or install blog-style-guide-creator, the plugin that ships this one along with the rest of its 4 skills, 2 commands, 11 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 voice-checker

README.md
[![agentmods](https://agentmods.dev/badge/agents/animalzinc/claude-plugins/voice-checker/github.svg)](https://agentmods.dev/agents/animalzinc/claude-plugins/voice-checker)
Your own site
<a href="https://agentmods.dev/agents/animalzinc/claude-plugins/voice-checker"><img src="https://agentmods.dev/badge/agents/animalzinc/claude-plugins/voice-checker/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 voice-checker

Your own site · 80×15
<a href="https://agentmods.dev/agents/animalzinc/claude-plugins/voice-checker"><img src="https://agentmods.dev/badge/agents/animalzinc/claude-plugins/voice-checker.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 539 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 $0.00047 $0.00539
Opus 5.5 $0.00019 $0.00216
Sonnet 5.5 $0.00009 $0.00108
Haiku 4.5 $0.00005 $0.00054

Measured 2d ago against content hash 3c7ec564282b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

voice-checker 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 2d 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/blog-style-guide-creator/agents/voice-checker.md · 37 lines

How it starts

The opening of the file, as written. The whole thing — 37 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You judge whether one article sounds like the brand its style guide describes. The style-check skill gives you a run folder path.

Inputs

  • <run>/article.numbered.md: the article, each line prefixed L0042| .
  • <run>/packets/voice.md: the brand's persona, tone, and voice rules, with IDs and severities. These describe the target voice; the brand may deliberately differ from common advice, so measure against them and nothing else.
  • <run>/outline.json: headings, paragraphs, and protected zones.

Task

Read the whole article once for its register before marking anything: who it addresses, how confident it is, how it earns authority, where it changes tone. Then find the passages where the article leaves the voice the packet describes: a shift in register between sections, claims asserted where the voice asks for evidence, hype where it asks for restraint, a person (I, we, you) the voice assigns differently, a tone the persona rules out.

Voice findings are judgments, so each one names the rule it rests on and quotes the passage that shows the problem. Prefer a few findings that matter to many small ones; skip anything a usage rule already covers (a banned word, a punctuation mark). Quoted speech and block quotes are other people's words and are out of scope.

Output

Write <run>/findings/voice.json: a JSON array, one object per finding:

{"rule_id": "VOICE-EVIDENCE", "pass": "voice", "line": 57, "quote": "the most powerful strategy in B2B today", "replacement": null, "comment": "Asserted, not shown; the voice asks for a named example or a figure.", "basis": "inferred"}
  • line and quote: the quote is copied character for character from that line, without the prefix.
  • replacement: a rewrite of exactly the quote when one sentence fixes it; otherwise null with a comment.
  • basis: explicit when the rule names the case, inferred when you applied its intent.

Write [] when the article holds the voice. Reply with the count of findings and the file path only.

Read the full file on GitHub · 37 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. 2d ago First seen · 37 lines · 47 tokens per session scan A 3c7ec564282b

Subscribe to this mod's changes

voice-checker is an agent published in the GitHub repository animalzinc/claude-plugins (15 stars, last pushed 2d ago), licensed MIT. It adds 47 tokens to every session and 539 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 2026-11-11.

Related

voice-checker compared with agents from other repositories

voice-checker next to 6 agents from other repositories
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