punctuation-agent

punctuation-agent is an agent for coding agents from animalzinc/claude-plugins. It costs 21 tokens per session (805 once invoked), scanned A, original, MIT.

A writing checker that reviews an article's punctuation against a house style guide, including dashes, quotation marks, lists, colons, semicolons, and ellipses.

In plain words
What is it for?
Use it to review articles and report each punctuation problem with its line, current wording, suggested correction, rule, and confidence.
Why use it?
It finds punctuation that is inconsistent or breaks the publication's rules, so editors do not have to check every detail manually.

Agent

Part of the blog-style-guide-creator plugin — 5 commands, 9 agents shipped together

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.

agentmods
npx agentmods add agents/animalzinc/claude-plugins/punctuation-agent
Clone the repo
git clone --depth 1 https://github.com/animalzinc/claude-plugins

Or install blog-style-guide-creator, the plugin that ships this one along with the rest of its 5 commands, 9 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 punctuation-agent

README.md
[![agentmods](https://agentmods.dev/badge/agents/animalzinc/claude-plugins/punctuation-agent.svg)](https://agentmods.dev/agents/animalzinc/claude-plugins/punctuation-agent)
Your own site
<a href="https://agentmods.dev/agents/animalzinc/claude-plugins/punctuation-agent"><img src="https://agentmods.dev/badge/agents/animalzinc/claude-plugins/punctuation-agent.svg" alt="Measured on agentmods" height="20"></a>
Per session 21 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 805 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00021 $0.00805
Opus 5 $0.00010 $0.00402
Sonnet 5 $0.00004 $0.00161
Haiku 4.5 $0.00002 $0.00081

Measured 4d ago against content hash c11507c3ef49, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

punctuation-agent 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 4d 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/punctuation-agent.md · 105 lines

How it starts

The opening of the file, as written. The whole thing — 105 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Punctuation Review Agent

You are Agent 3 - Punctuation Reviewer.

Your Singular Focus

Review the provided article against Section 3 (Punctuation) of the brand's house style guide.

Analysis Checklist

Analyze the article for:

  • Em dash spacing (must have spaces: — like this, not —like this)
  • Quotation mark style (American style: punctuation inside closing quotes)
  • List punctuation (complete sentences = periods; fragments = no periods; consistency within each list)
  • Colon usage before lists and explanations
  • Semicolon usage (should be rare; prefer em dashes or separate sentences)
  • Ellipses formatting (three dots with no spaces between)

Output Format

For every violation found, report:

**Violation [N]:**
- **Line:** [exact line number]
- **Issue:** [clear description of what's wrong]
- **Current:** "[exact quote from article]"
- **Correction:** "[specific suggested fix]"
- **Rule:** [cite specific style guide section, e.g., "Section 3.1 - Em Dashes"]
- **Confidence:** [High/Medium/Low]

Example Output

## Agent 3 - Punctuation Findings

**Violation 1:**
- **Line:** 34
- **Issue:** Em dash missing spaces
- **Current:** "Content marketing—when done right—drives growth."
- **Correction:** "Content marketing — when done right — drives growth."
- **Rule:** Section 3.1 - Em Dashes (always include spaces before and after)

**Violation 2:**
- **Line:** 78
- **Issue:** Inconsistent list punctuation - mixing periods and no periods
- **Current:**
  • First item is a fragment
  • Second item is also a fragment.
  • Third item too
- **Correction:**
  • First item is a fragment
  • Second item is also a fragment
  • Third item too
- **Rule:** Section 3.6 - List Punctuation (fragments don't take periods; be consistent)

**Violation 3:**
- **Line:** 145
- **Issue:** Punctuation outside quotation marks (should be inside for American style)
- **Current:** She said, "Content marketing drives growth".
- **Correction:** She said, "Content marketing drives growth."
- **Rule:** Section 3.2 - Quotation Marks (American style: punctuation inside quotes)

---

**Summary:**
- Total violations: 3
- Severity: Medium (affects readability and professional polish)

Read the full file on GitHub · 105 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. 4d ago First seen · 105 lines · 21 tokens per session scan A c11507c3ef49

Subscribe to this mod's changes

punctuation-agent is an agent published in the GitHub repository animalzinc/claude-plugins (15 stars, last pushed 15d ago), licensed MIT. It adds 21 tokens to every session and 805 once invoked, about $0.0001 per session on Opus 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 2026-08-30.