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.
/plugin marketplace add animalzinc/claude-plugins/plugin install blog-style-guide-creatorWrote 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.
[](https://agentmods.dev/skills/animalzinc/claude-plugins/style-check)<a href="https://agentmods.dev/skills/animalzinc/claude-plugins/style-check"><img src="https://agentmods.dev/badge/skills/animalzinc/claude-plugins/style-check/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.
<a href="https://agentmods.dev/skills/animalzinc/claude-plugins/style-check"><img src="https://agentmods.dev/badge/skills/animalzinc/claude-plugins/style-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00131 | $0.01781 |
| Opus 5.5 | $0.00052 | $0.00712 |
| Sonnet 5.5 | $0.00026 | $0.00356 |
| Haiku 4.5 | $0.00013 | $0.00178 |
Grade A, and why
style-check 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.
How it starts
The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Style check
Checks one article against one brand's guide. Code settles what a pattern can settle; agents judge the rest; a second agent verifies every judgment; code drops any finding whose quote is not in the article. The report goes next to the article, so the user can open it, and nothing in the article changes unless the user asks.
Arguments: $ARGUMENTS
Commands
Every sgc step below is python3 "${CLAUDE_PLUGIN_ROOT}/scripts/sgc.py" <command> ...; write the command out in full each time, because the plugin path is substituted in this text and is not set in the shell. Run each command as its own Bash call, never chained with ;, &&, or a pipe, so it matches the skill's permission for sgc; read and list files with the Read and Glob tools. On Windows use py -3 in place of python3. If neither runs Python 3.9 or later, stop and tell the user the plugin needs Python 3.9+ from python.org.
sgc prints JSON. A non-zero exit prints the reason on stderr: show it to the user and stop, unless a step below says how to recover.
Steps
1. Resolve the guide
Read <brand> and the article path from the arguments, plus these flags:
| Flag | Meaning | Default |
|---|---|---|
--type T |
Content type, one of the guide's content_types |
The article's frontmatter content_type or type |
--draft human|ai |
Who wrote the draft; rules marked ai-drafting are suggestions on a human draft |
human |
--facts |
Also fact-check claims and links | Off |
--apply |
Offer fixes after the report | Off |
--guide F |
Use this guide file instead of the brand folder's | None |
The plugin's guides folder setting reads: ${user_config.guides_dir}. Run sgc brand-path <brand> --project-dir "${CLAUDE_PROJECT_DIR}", adding --guides-dir "<path>" only when that setting is an absolute path (an unset setting shows as text starting with ${, which must never reach the shell), and --guide F when given. From its JSON:
guide_existsfalse: stop and offerbuild-style-guide <brand>.schema_version1: continue (the tools read v1 guides), and add one line to the summary recommendingbuild-style-guide <brand> --upgrade.- Keep
guideandbrand_dirfor the steps below.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 2d ago First seen · 90 lines · 131 tokens per session scan A e6db2773fd9e
style-check is a skill published in the GitHub repository animalzinc/claude-plugins (15 stars, last pushed 2d ago), licensed MIT. It adds 131 tokens to every session and 1,781 once invoked, about $0.0005 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.
style-check compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| style-checkanimalzinc/claude-plugins | Skill | 15 | 2d ago | MIT | A | 131 | Claude Code |
| cf-style-guideteachskillofskills-ai/ContentForge-techshu | Skill | 1 | 2mo ago | MIT | A | 178 | Claude Code |
| cf-briefteachskillofskills-ai/ContentForge-techshu | Skill | 1 | 2mo ago | MIT | A | 169 | Claude Code |
| cf-helpteachskillofskills-ai/ContentForge-techshu | Skill | 1 | 2mo ago | MIT | A | 149 | Claude Code |
| cf-publishteachskillofskills-ai/ContentForge-techshu | Skill | 1 | 2mo ago | MIT | A | 168 | Claude Code |
| cf-templateteachskillofskills-ai/ContentForge-techshu | Skill | 1 | 2mo ago | MIT | A | 160 | Claude Code |
| cf-variantsteachskillofskills-ai/ContentForge-techshu | Skill | 1 | 2mo ago | MIT | A | 162 | Claude Code |