What is mastodon-cli?

A command-line add-on for Mastodon, a social network made up of independently operated servers. It uses the toot program to work with posts, timelines, notifications, and accounts.

Use it to publish posts, read timelines and notifications, search, follow or unfollow accounts, boost posts, and add favourites.

It brings routine Mastodon actions into the terminal, so you can manage social activity from command-line workflows.

mastodon-cli — Plugin by trtmn

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.

Claude Code

/plugin marketplace add trtmn/agent-plugins

agentmods

npx agentmods add plugins/trtmn/agent-plugins/mastodon-cli

Clone the repo

git clone --depth 1 https://github.com/trtmn/agent-plugins

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

mastodon-cli 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 yesterday.

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/mastodon-cli/.claude-plugin/plugin.json · 6 lines

What it actually says

{
  "name": "mastodon-cli",
  "version": "1.0.0",
  "description": "Interact with Mastodon using the `toot` CLI — post statuses, read timelines, check notifications, search, follow/unfollow, boost, favourite, and manage your account. Use this skill whenever the user mentions Mastodon, tooting, fediverse, their timeline, mentions, boosts, favourites, followers, or anything related to social media posting on Mastodon. Also trigger when the user asks to check what's happening on social media, wants to share something publicly, asks about trending topics, or says things like 'post this', 'toot this', 'check my mentions', 'what's on my timeline', 'who followed me', or 'boost that'. Even casual references like 'share this on masto' or 'what's trending' should trigger this skill."
}

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.

yesterday First seen · 6 lines scan A 3bc45a9d4e80

Subscribe to this mod's changes

mastodon-cli is a plugin published in the GitHub repository trtmn/agent-plugins (2 stars, last pushed 4d ago), licensed Unlicense. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-08-31.

Research

mastodon-cli

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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