A skill for managing an Obsidian vault, a folder of linked notes used as a lasting knowledge base. It resolves the vault, checks its rules, creates and organizes typed notes, and recalls earlier information.

Use it to create or reclassify notes, update properties and links in bulk, maintain the vault's wiki structure, and retrieve information from earlier sessions.

It keeps important knowledge in one governed place rather than scattered across chat history, scratch files, or separate systems. Its checks help prevent misplaced, duplicated, or incomplete notes.

obsidian — Skill for Claude Code by larsboes/Axon

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 larsboes/Axon --skill obsidian

Clone the repo

git clone --depth 1 https://github.com/larsboes/Axon

Made for: Claude Code.

Or install knowledge, the plugin that ships this one along with the rest of its 3 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/larsboes/axon/obsidian/github.svg)](https://agentmods.dev/skills/larsboes/axon/obsidian)

Your own site

<a href="https://agentmods.dev/skills/larsboes/axon/obsidian"><img src="https://agentmods.dev/badge/skills/larsboes/axon/obsidian/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/larsboes/axon/obsidian"><img src="https://agentmods.dev/badge/skills/larsboes/axon/obsidian.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 136 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,695 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 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.

Model	Per session	Once invoked
Fable 5.1	$0.00136	$0.01695
Opus 5.5	$0.00054	$0.00678
Sonnet 5.5	$0.00027	$0.00339
Haiku 4.5	$0.00014	$0.00169

Measured 1mo ago against content hash f22bb1f934e1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

obsidian 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 1mo 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.

Packs/knowledge/skills/obsidian/SKILL.md · 113 lines

How it starts

The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Obsidian

The vault is an Obsidian Life OS, not a code repo, and it is the one place knowledge is allowed to be durable. Anything worth keeping ends up here as a typed note — not in a session transcript, not in a scratch file, not in a second system beside the vault.

1 · Resolve and gate (always first, never hardcode)

VAULT=$(scripts/vault root)          # from the overlay's config/knowledge.toml
scripts/vault contract               # fails loudly if the contract is missing

Read $VAULT/Projects/Axon/Knowledge-Base/Vault-Contract.md before creating, moving, or retyping any note. It owns placement, the no-doubling law, naming, and frontmatter typing. If it is missing, stop and say so — do not improvise structure. There is no vault-root AGENTS.md pointer today; the contract path above is the pointer (verified absent 2026-09-09).

Three rules from it that gate every single write, restated because they are what goes wrong:

Type at birth. No note without type: + maturity: seedling + summary: + categories:.
One owner per kind of statement. A concept is Knowledge, a proper-noun instance is Atlas, a consumed work is Atlas/Media (ideas graduate to a Knowledge concept), what-happened is Atlas/Events + Journal, a pattern is Atlas/Reflections, a decision is the Project. Assert once; thread everywhere with [[links]].
Update the owner in place. A new note must earn its folder; a new folder needs 3+ notes.

2 · Read before you act

Almost everything already has a home. Grep the vault and open the owning note before answering a planning or "update my X" request — the job is to find where it lives, not to invent a new place. A note with no inbound or outbound link is a leak.

3 · Pick the reference

Task	Read
Wikilinks, embeds, callouts, properties	`references/markdown.md`
`.base` views, filters, formulas	`references/bases.md`
`.canvas` files	`references/canvas.md`
Obsidian CLI (notes, search, properties, plugin dev)	`references/cli.md`, then `obsidian help` — authoritative
Ingest a source · synthesize across notes · lint the wiki	`references/wiki.md`

Read the full file on GitHub · 113 lines

Files

What ships with it

6 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.

1mo ago Changed · +2 lines f22bb1f934e1
2mo ago First seen · 111 lines · 136 tokens per session scan A 1a244a749c60

Subscribe to this mod's changes

obsidian is a skill published in the GitHub repository larsboes/Axon (1 stars, last pushed 1mo ago), licensed MIT. It adds 136 tokens to every session and 1,695 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 2026-08-31.

Memory and context Productivity agent-skills ai-agents bazel claude integration-platform local-first

obsidian next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
obsidianlarsboes/Axon	Skill	1	1mo ago	MIT	A	136	Claude Code
reflectsamzong/Recall	Skill	109	yesterday	MIT	A	57	Codex
notiontaracodlabs/aiden	Skill	875	18d ago	AGPL-3.0	A	20	Claude Code, Codex
recapM-T-D-N/agentmemory-codex-windows	Skill	2	5d ago	Apache-2.0	A	58	Claude Code
any-mcpstevelr/anytype	Skill	34	1mo ago	Apache-2.0	A	68	Claude Code, Codex
yaps-dictationrichawo/yaps-codex-plugin	Skill	2	20d ago	MIT	A	103	Claude Code, Codex
alcove-hubOctopusGarage/alcove	Skill	0	3d ago	MIT	A	36	Claude Code, Codex