obsidian-note-expert

obsidian-note-expert is a skill for Claude Code, Codex from LeoLB-Wang/pensieve-obsidian-skill. It costs 37 tokens per session (674 once invoked), scanned A, original, MIT.

A note-taking agent for Obsidian, an app that stores linked notes in a local folder called a vault. It organises knowledge into an index, summaries, and detailed notes using progressive summarisation.

In plain words
What is it for?
Use it to save project notes, research, conclusions, and open actions in Obsidian, with dated detail files and updated index and summary pages.
Why use it?
It keeps information easy to retrieve while preserving history: new notes are appended rather than replacing earlier ones.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: reads .claude/ paths.

Good fit Use it to save project notes, research, conclusions, and open actions in Obsidian, with dated detail files and updated index and summary pages.

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Install with agentmods
npx agentmods add skills/leolb-wang/pensieve-obsidian-skill/obsidian-note
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 LeoLB-Wang/pensieve-obsidian-skill --skill obsidian-note
Clone the repo
git clone --depth 1 https://github.com/LeoLB-Wang/pensieve-obsidian-skill

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 obsidian-note-expert

README.md
[![agentmods](https://agentmods.dev/badge/skills/leolb-wang/pensieve-obsidian-skill/obsidian-note/github.svg)](https://agentmods.dev/skills/leolb-wang/pensieve-obsidian-skill/obsidian-note)
Your own site
<a href="https://agentmods.dev/skills/leolb-wang/pensieve-obsidian-skill/obsidian-note"><img src="https://agentmods.dev/badge/skills/leolb-wang/pensieve-obsidian-skill/obsidian-note/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 obsidian-note-expert

Your own site · 80×15
<a href="https://agentmods.dev/skills/leolb-wang/pensieve-obsidian-skill/obsidian-note"><img src="https://agentmods.dev/badge/skills/leolb-wang/pensieve-obsidian-skill/obsidian-note.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 674 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00037 $0.00674
Opus 5 $0.00018 $0.00337
Sonnet 5 $0.00007 $0.00135
Haiku 4.5 $0.00004 $0.00067

Measured 10d ago against content hash ea0a4e83c791, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

obsidian-note-expert 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 10d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (create_obsidian_note.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

obsidian-note/SKILL.md · 70 lines

How it starts

The opening of the file, as written. The whole thing — 70 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Role: Obsidian Knowledge Architect

1. Storage Logic (Index -> Summary -> Detail)

vault/{project}/
├── Index.md                         <- Project index + cross-agent memory (agent reads this first)
└── {topic}/
    ├── Summary.md                   <- Entries grouped by month, newest first
    └── Details/
        ├── {topic}-2026-03-08.md
        ├── {topic}-2026-03-08-2.md  <- Same-day collision: auto-increment
        └── {topic}-2026-03-15.md

Agent retrieval flow: read Index.md -> locate topic by type/conclusion -> drill into Summary.md -> read specific Detail if needed.

2. Append-Only Rules

  • Detail: always creates a new file (same-day: -2, -3, ...)
  • Summary: always appends entry under month group, never skips similar content
  • Index: updates topic metadata (latest conclusion/date) and aggregates open action items for quick scanning; history preserved in Summary

3. Configuration

Config CLI Flag Env Var Default
Vault path --vault OBSIDIAN_VAULT (required)
Task type --task-type note
Date format --date-format %Y-%m-%d

Templates in templates/ can be freely customized:

  • templates/Index.md — Project index
  • templates/L1-Summary.md — Topic summary
  • templates/L2-Detail.md — Detail note

4. Cross-Agent Memory

Index.md doubles as the cross-agent memory file. After each archive, append an ## Open Action Items section at the bottom of Index.md, aggregating uncompleted todos from the latest Detail of each topic. Any agent can read Index.md to get both the knowledge map and pending tasks in a single file read.

5. How to Archive (IMPORTANT)

Always use the script — do NOT manually create files with Write/Edit tools. One command generates all three layers + aggregates action items:

python3 ~/.claude/skills/obsidian-note/create_obsidian_note.py \
  --project "{project}" \
  --topic "{topic}" \
  --task-type "{type}" \
  --conclusion "{one-line summary}" \
  --outcomes "{bullet list of key outcomes}" \
  --analysis "{detailed analysis}" \
  --todos "{markdown checklist of action items}"

Read the full file on GitHub · 70 lines

Files

What ships with it

4 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. 10d ago First seen · 70 lines · 37 tokens per session scan A ea0a4e83c791

Subscribe to this mod's changes

obsidian-note-expert is a skill published in the GitHub repository LeoLB-Wang/pensieve-obsidian-skill (2 stars, last pushed 6mo ago), licensed MIT. It adds 37 tokens to every session and 674 once invoked, about $0.0002 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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