mastodon-style

mastodon-style is a skill for Claude Code, Codex from vercel-labs/marketing-team-eve-template. It costs 19 tokens per session (448 once invoked), scanned A, original, MIT.

A writing guide for drafting or editing posts on Mastodon, a decentralized social-network service often called part of the fediverse.

In plain words
What is it for?
It is for writing or revising individual Mastodon posts, including their wording, source links, hashtags, content warnings and accessibility text.
Why use it?
It helps posts fit Mastodon’s community-focused culture and account for practical details such as character limits, links, hashtags, content warnings and image descriptions.

Skill for Claude CodeCodex ✓ vendor

Written for no agent in particular: nothing here depends on one.

Good fit It is for writing or revising individual Mastodon posts, including their wording, source links, hashtags, content warnings and accessibility text.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/vercel-labs/marketing-team-eve-template/mastodon-style
About the project

vercel-labs/marketing-team-eve-template is a deployable team of AI marketing agents led by a coordinating agent that delegates launches, writing, and conversion work to specialists. Teams use it through Slack or a terminal to create blog drafts, social posts, and email campaigns in Notion, Typefully, and Resend, with approval required for irreversible actions. The catalogue skills and instructions define workflows for using this marketing team.

vercel-labs/marketing-team-eve-template · 436 stars · on GitHub · vercel.com

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.

Any agent
npx skills add vercel-labs/marketing-team-eve-template --skill mastodon-style
Clone the repo
git clone --depth 1 https://github.com/vercel-labs/marketing-team-eve-template

Made for: Claude Code, Codex.

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 mastodon-style

README.md
[![agentmods](https://agentmods.dev/badge/skills/vercel-labs/marketing-team-eve-template/mastodon-style/github.svg)](https://agentmods.dev/skills/vercel-labs/marketing-team-eve-template/mastodon-style)
Your own site
<a href="https://agentmods.dev/skills/vercel-labs/marketing-team-eve-template/mastodon-style"><img src="https://agentmods.dev/badge/skills/vercel-labs/marketing-team-eve-template/mastodon-style/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 mastodon-style

Your own site · 80×15
<a href="https://agentmods.dev/skills/vercel-labs/marketing-team-eve-template/mastodon-style"><img src="https://agentmods.dev/badge/skills/vercel-labs/marketing-team-eve-template/mastodon-style.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 448 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00019 $0.00448
Opus 5 $0.00010 $0.00224
Sonnet 5 $0.00004 $0.00090
Haiku 4.5 $0.00002 $0.00045

Measured 13d ago against content hash 6ab194a864d2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

mastodon-style 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 13d 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.

agent/subagents/social-media-coordinator/skills/mastodon-style/SKILL.md · 30 lines

What it actually says

Mastodon voice & style

When writing or editing a post for Mastodon:

  • Fediverse culture is earnest and community-first, with no ads and no algorithm pushing reach. Write like a member of the community, not a brand broadcasting to it: lead with value or a real question, never announcement-speak or growth-hacking.
  • ~500 characters (the common default; some instances allow more). No need to fill it.
  • Link directly to the source. Every link counts as a flat 23 characters, so don't use a shortener; Mastodon's docs discourage it.
  • Add alt text to every image. It's a strong, near-universal accessibility norm, not a nicety.
  • Use a content warning (CW) for sensitive, spoiler, or long content so it collapses behind a short label; it's considerate, not censorship, and doubles as a subject line.
  • Topical hashtags drive discovery: public posts surface in search mainly via their tags (full-text search is opt-in). Use a few relevant ones in CamelCase (e.g. #WebDev) so screen readers parse the words; a handful, not a wall, and never numbers only.
  • The feed is chronological, so write each post to stand on its own.

Structure

  1. Open: the honest hook or the question, line one.
  2. Body: the substance, plainly.
  3. Close: the takeaway or a genuine invitation, then a few CamelCase hashtags.

References

  • references/best-practices.md: researched tactics as a checklist, with sources.
  • references/post-specs.md: hard constraints (character limit, links, CW, alt text, hashtags).
  • references/banned-words.json: the words to avoid. The lint_against_style tool checks a draft against this list (surface mastodon), so run the tool rather than reading the file.

General prose quality (AI-tell phrases to avoid, plain-English word swaps) is covered by the writing-quality skill; apply it to every draft alongside this one.

Files

What ships with it

3 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.

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. 13d ago First seen · 30 lines · 19 tokens per session scan A 6ab194a864d2

Subscribe to this mod's changes

mastodon-style is a skill published in the GitHub repository vercel-labs/marketing-team-eve-template (436 stars, last pushed 23d ago), licensed MIT. It adds 19 tokens to every session and 448 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.

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