kb-fediverse-hashtags

kb-fediverse-hashtags is a skill for Claude Code from reiver/vibefed. It costs 122 tokens per session (2,795 once invoked), scanned A, original, no licence file.

Background knowledge about hashtags in the Fediverse, a network of independently operated social sites that communicate using ActivityPub, including how hashtags are represented and shared.

In plain words
What is it for?
Implementing hashtag support, checking a codebase for it, understanding ActivityPub hashtag data, and investigating federation or search problems.
Why use it?
It helps explain why hashtag search or following may produce incomplete results across different sites.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Part of the vibefed plugin — 29 skills shipped together

Good fit Implementing hashtag support, checking a codebase for it, understanding ActivityPub hashtag data, and investigating federation or search problems.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/reiver/vibefed/kb-fediverse-hashtags
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 reiver/vibefed --skill kb-fediverse-hashtags
Clone the repo
git clone --depth 1 https://github.com/reiver/vibefed

Made for: Claude Code.

Or install vibefed, the plugin that ships this one along with the rest of its 29 skills.

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 kb-fediverse-hashtags

README.md
[![agentmods](https://agentmods.dev/badge/skills/reiver/vibefed/kb-fediverse-hashtags/github.svg)](https://agentmods.dev/skills/reiver/vibefed/kb-fediverse-hashtags)
Your own site
<a href="https://agentmods.dev/skills/reiver/vibefed/kb-fediverse-hashtags"><img src="https://agentmods.dev/badge/skills/reiver/vibefed/kb-fediverse-hashtags/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 kb-fediverse-hashtags

Your own site · 80×15
<a href="https://agentmods.dev/skills/reiver/vibefed/kb-fediverse-hashtags"><img src="https://agentmods.dev/badge/skills/reiver/vibefed/kb-fediverse-hashtags.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 122 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,795 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 unknown 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 $0.00122 $0.02795
Opus 5 $0.00061 $0.01398
Sonnet 5 $0.00024 $0.00559
Haiku 4.5 $0.00012 $0.00280

Measured 12d ago against content hash 16bc64683d8e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

kb-fediverse-hashtags 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 12d 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.

skills/kb-fediverse-hashtags/SKILL.md · 310 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 12d ago First seen · 310 lines · 122 tokens per session scan A 16bc64683d8e

Subscribe to this mod's changes

kb-fediverse-hashtags is a skill published in the GitHub repository reiver/vibefed (9 stars, last pushed 5mo ago), with no licence file. It adds 122 tokens to every session and 2,795 once invoked, about $0.0006 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 2026-08-31.

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