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/AGENTS.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/agents-md)<a href="https://agentmods.dev/instructions/breferrari/obsidian-mind/agents-md"><img src="https://agentmods.dev/badge/instructions/breferrari/obsidian-mind/agents-md/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.
<a href="https://agentmods.dev/instructions/breferrari/obsidian-mind/agents-md"><img src="https://agentmods.dev/badge/instructions/breferrari/obsidian-mind/agents-md.svg" alt="Reviewed on agentmods" width="80" 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 | $0.05309 | $0.05309 |
| Opus 5.5 | $0.02124 | $0.02124 |
| Sonnet 5.5 | $0.01062 | $0.01062 |
| Haiku 4.5 | $0.00531 | $0.00531 |
Grade A, and why
obsidian-mind AGENTS.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 13d 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 — 286 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 agent context.
Vault Structure
| Folder | Purpose | Key Files |
|---|---|---|
Home.md |
Vault entry point -- embedded Base views, quick links | Open this first |
vault-manifest.json |
Template metadata -- version, infrastructure vs user content boundaries, frontmatter schemas, version fingerprints | Used by /om-vault-upgrade for migration |
CHANGELOG.md |
Version history -- tracks template releases (v1--v3.3) with what changed | Reference for upgrade paths |
bases/ |
All Bases centralized -- dynamic views for navigation | Work Dashboard (incl. Stale Actives), Recently Touched (recency by real mtime — the answer to "what's most recent", not filename dates), Incidents, People Directory, 1-1 History, Review Evidence, Competency Map, Templates |
work/ |
Work notes index | Index.md (detailed MOC) |
work/active/ |
Current projects only (1-3 files) | Move here when starting, move to archive when done |
work/archive/YYYY/ |
Completed work organized by year | Grows over time |
work/incidents/ |
Incident docs (main note + RCA + deep dive + drafts) | Per-incident grouping |
work/1-1/ |
1:1 meeting notes (accumulate weekly) | Named <Person> YYYY-MM-DD.md |
work/meetings/ |
Meeting notes inbox -- staging area for raw exports, processed by /om-intake |
Drop files, run /om-intake |
perf/ |
Performance framework, brag doc | Brag Doc.md (index) |
perf/brag/ |
Quarterly brag notes | One per quarter, e.g. Q1 2025.md |
perf/competencies/ |
Atomic competency notes (link targets) | One note per competency |
perf/evidence/ |
PR deep scans, data extracts for reviews | Named <Person> PRs - <Period>.md |
perf/<cycle>/ |
Review cycle briefs + artifacts | Review briefs (private, manager, peer) |
brain/ |
The agent's operational knowledge | Memories.md, Key Decisions.md, Patterns.md, Gotchas.md, Skills.md, North Star.md |
memories/YYYY/MM/ |
Cross-repo agent memory -- durable lessons recorded over MCP by sessions working in other repositories. Time is the only thing in the path; reach is declared in frontmatter | Browse via bases/Memories.base; never edit by hand |
org/ |
Organizational knowledge index | People & Context.md (MOC) |
org/people/ |
Atomic person notes | One note per person |
org/teams/ |
Team notes as graph nodes | One note per team |
reference/ |
Codebase knowledge, architecture maps | Flow docs, architecture docs |
thinking/ |
Scratchpad for drafts and reasoning | Named YYYY-MM-DD-topic.md |
templates/ |
Obsidian templates | Work Note.md, Decision Record.md, etc. |
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.
- 13d ago Changed · +215 lines · +4,060 tokens per session scan B → A f4c5a7aa4d30
- 22d ago Changed · +79 tokens per session d41f071b5eb4
- 23d ago Changed · +25 tokens per session 52a728e5d168
- 1mo ago First seen · 71 lines · 1,145 tokens per session scan B 68fe756bd39d
obsidian-mind AGENTS.md is an instructions file published in the GitHub repository breferrari/obsidian-mind (5,427 stars, last pushed 8d ago), licensed MIT. It adds 5,309 tokens to every session, about $0.0212 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 2026-08-30.
Other instructions, from other repositories
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.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
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 copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.