Obsidian Mind is an Obsidian vault that stores notes, links, indexes, and other accumulated context so AI coding agents can retain memory across sessions. It is designed for Claude Code and also supports Codex CLI and Gemini CLI through shared hooks, commands, and vault data. Its catalogue add-ons package the vault’s commands, agents, skills, hooks, instructions, settings, plugin, and MCP integration.
Borrowing it
Nothing to install: this file belongs to breferrari/obsidian-mind. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/breferrari/obsidian-mind/main/CLAUDE.mdgit clone --depth 1 https://github.com/breferrari/obsidian-mindWrote 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.
[](https://agentmods.dev/instructions/breferrari/obsidian-mind/claude-md)<a href="https://agentmods.dev/instructions/breferrari/obsidian-mind/claude-md"><img src="https://agentmods.dev/badge/instructions/breferrari/obsidian-mind/claude-md.svg" alt="Measured on agentmods" height="20"></a>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 | $0.09405 | $0.09405 |
| Opus 5 | $0.04702 | $0.04702 |
| Sonnet 5 | $0.01881 | $0.01881 |
| Haiku 4.5 | $0.00941 | $0.00941 |
Grade A, and why
obsidian-mind CLAUDE.md 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 473 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Obsidian Mind
Personal Obsidian vault -- an external brain for work notes, decisions, performance tracking, and Claude context.
Skills & Capabilities
This vault has obsidian-skills installed in .claude/skills/. Follow these skill conventions:
-
obsidian-markdown: Obsidian-flavored markdown -- wikilinks, embeds, callouts, properties. See
references/for callout types, embed syntax, and property specs. Always prefer[[wikilinks]]over markdown links. -
obsidian-cli: CLI commands for vault operations when Obsidian is running. See CLI section below.
-
json-canvas: Create
.canvasfiles with nodes, edges, and visual layouts. Seereferences/EXAMPLES.md. -
obsidian-bases: Create
.basefiles with views, filters, and formulas. Bases core plugin is enabled. Seereferences/FUNCTIONS_REFERENCE.md. -
defuddle: Extract clean markdown from web pages via
defuddle parse <url> --md. -
qmd: Semantic search across the vault via QMD. Use PROACTIVELY before reading files. Preference order — pick the highest surface available and stop:
mcp__qmd__query,mcp__qmd__get,mcp__qmd__multi_get,mcp__qmd__status— registered MCP tools. If you see them in your tool menu, they are live and pre-scoped to this vault's index. Use them first; no--indexargument needed.qmd --index <name> query|search|vsearch|get|multi-get— CLI fallback for one-off shell checks or when the MCP server is unavailable. Always pass--index <name>, where<name>is theqmd_indexfield fromvault-manifest.jsonwhen set and otherwise the vault folder name slugified, so the SQLite store stays isolated from other vaults on the machine.- Grep / Glob / Read — last resort, only when QMD is not installed at all.
The MCP server (
.mcp.json→.claude/scripts/qmd-mcp.mjs), the CLI, and the SessionStart hook all read the same manifest field, so every surface scopes to the same store. On a fresh clone, runnode --experimental-strip-types .scripts/qmd-bootstrap.tsonce to build the index. Note: the MCP connect-time banner can read "0 documents" when the server registers before the SessionStart reindex finishes — a stale snapshot, not the dead-search state the self-heal guards; don't diagnose it.
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.
- 8d ago First seen · 473 lines · 9,405 tokens per session scan A ba53e361daa3
obsidian-mind CLAUDE.md is an instructions file published in the GitHub repository breferrari/obsidian-mind (4,610 stars, last pushed 5d ago), licensed MIT. It adds 9,405 tokens to every session, about $0.0470 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 2026-08-30.
Other instructions, from other repositories
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.