tag-taxonomy

tag-taxonomy is a skill for Claude Code, Codex from saski/arnesto. It costs 115 tokens per session (1,600 once invoked), scanned A, a copy of tag-taxonomy, Unlicense.

A controlled vocabulary for keeping tags consistent across an Obsidian wiki, a markdown-based personal knowledge system.

In plain words
What is it for?
Use it to audit tags, map aliases to approved names, and choose consistent tags when creating or updating wiki pages.
Why use it?
It prevents multiple tags with the same meaning from making pages difficult to find and organize.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it to audit tags, map aliases to approved names, and choose consistent tags when creating or updating wiki pages.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/saski/arnesto/tag-taxonomy
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 saski/arnesto --skill tag-taxonomy
Clone the repo
git clone --depth 1 https://github.com/saski/arnesto

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 tag-taxonomy

README.md
[![agentmods](https://agentmods.dev/badge/skills/saski/arnesto/tag-taxonomy.svg)](https://agentmods.dev/skills/saski/arnesto/tag-taxonomy)
Your own site
<a href="https://agentmods.dev/skills/saski/arnesto/tag-taxonomy"><img src="https://agentmods.dev/badge/skills/saski/arnesto/tag-taxonomy.svg" alt="Measured on agentmods" height="20"></a>
Per session 115 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,600 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 88% copy Near-identical to another mod 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 $0.00115 $0.01600
Opus 5 $0.00057 $0.00800
Sonnet 5 $0.00023 $0.00320
Haiku 4.5 $0.00012 $0.00160

Measured 4d ago against content hash 90a69fafc9de, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

tag-taxonomy 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.

Origin

This is a copy

88% identical to tag-taxonomy — 37 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/tag-taxonomy/SKILL.md · 184 lines

How it starts

The opening of the file, as written. The whole thing — 184 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Tag Taxonomy — Controlled Vocabulary for Wiki Tags

You are enforcing consistent tagging across the wiki by normalizing tags to a controlled vocabulary.

Before You Start

  1. Read .env to get OBSIDIAN_VAULT_PATH
  2. Read $OBSIDIAN_VAULT_PATH/_meta/taxonomy.md — this is the canonical tag list
  3. Read index.md to understand the wiki's scope

The Taxonomy File

The canonical tag vocabulary lives at $OBSIDIAN_VAULT_PATH/_meta/taxonomy.md. It defines:

  • Canonical tags — the tags that should be used
  • Aliases — common alternatives that should be mapped to the canonical form
  • Rules — max 5 tags per page, lowercase/hyphenated, prefer broad over narrow
  • Migration guide — specific renames for known inconsistencies

Always read this file before tagging. It's the source of truth.

Reserved System Tags

visibility/ is a reserved tag group with special rules. These tags are not domain or type tags and are managed separately from the taxonomy vocabulary:

Tag Purpose
visibility/public Explicitly public — shown in all modes (same as no tag)
visibility/internal Team-only — excluded in filtered query/export mode
visibility/pii Sensitive data — excluded in filtered query/export mode

Rules for visibility/ tags:

  • They do not count toward the 5-tag limit
  • Only one visibility/ tag per page
  • Omit entirely when content is clearly public — no tag needed
  • Never add visibility/internal just because content is technical; use it only for genuinely team-restricted knowledge
  • When running a tag audit, report visibility/ tag usage separately — do not flag them as unknown or non-canonical

When normalizing tags, leave visibility/ tags untouched — they are not subject to alias mapping.

Mode 1: Tag Audit

When the user wants to see the current state of tags:

Step 1: Scan all pages

Glob: $VAULT_PATH/**/*.md (excluding _archives/, .obsidian/, _meta/)
Extract: tags field from YAML frontmatter

Read the full file on GitHub · 184 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 · 184 lines · 115 tokens per session scan A 90a69fafc9de

Subscribe to this mod's changes

tag-taxonomy is a skill published in the GitHub repository saski/arnesto (5 stars, last pushed yesterday), licensed Unlicense. It adds 115 tokens to every session and 1,600 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. It is 88% identical to tag-taxonomy, differing in 37 lines, and is treated as a copy.

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