obsidian-mcp-router: Instructions file for Codex

AGENTS.md

obsidian-mcp-router AGENTS.md is an instructions file for Codex, OpenCode from tboome33/obsidian-mcp-router. It costs 2,439 tokens per session, scanned A, original, Apache-2.0.

A repository instruction file that tells coding agents how to work in a specific project. It documents the project structure, required checks, and rules that are tested for becoming outdated.

In plain words
What is it for?
Use it to guide agents working on the Obsidian MCP router, including its Node.js setup, repository contracts, checks, and skills.
Why use it?
It gives different coding tools the same operating rules and exposes drift when documented paths or commands stop matching the project.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions subagents; mentions AGENTS.md; mentions Codex.

This is tboome33/obsidian-mcp-router's own configuration. It tells Codex and OpenCode how to work on obsidian-mcp-router itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything obsidian-mcp-router configures →

Reuse

Borrowing it

Nothing to install: this file belongs to tboome33/obsidian-mcp-router. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/tboome33/obsidian-mcp-router/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/tboome33/obsidian-mcp-router

Made for: Codex, OpenCode.

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-mcp-router AGENTS.md

README.md
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Your own site
<a href="https://agentmods.dev/instructions/tboome33/obsidian-mcp-router/agents-md"><img src="https://agentmods.dev/badge/instructions/tboome33/obsidian-mcp-router/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.

agentmods 80×15 button for obsidian-mcp-router AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/tboome33/obsidian-mcp-router/agents-md"><img src="https://agentmods.dev/badge/instructions/tboome33/obsidian-mcp-router/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,439 This file is loaded in full into every session.
When invoked 2,439 The same file — it is already loaded in full.
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 $0.02439 $0.02439
Opus 5 $0.01220 $0.01220
Sonnet 5 $0.00488 $0.00488
Haiku 4.5 $0.00244 $0.00244

Measured 7d ago against content hash 60f8fb973850, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

obsidian-mcp-router 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 7d 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.

AGENTS.md · 191 lines

How it starts

The opening of the file, as written. The whole thing — 191 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — operating contract for obsidian-mcp-router

Host-neutral instructions for any coding agent working in this repository. Codex, Gemini CLI, Cursor and Windsurf are all documented as reading this file; per-host provenance — which paths were confirmed and which are taken on a vendor's word — is recorded in contracts/agent-host-targets.json. Nothing here assumes a particular harness.

This file is read automatically and will steer actions. Treat it as code: every backticked repository path and every npm run script below is resolved against the filesystem and against package.json by tests/agents-md-contract.test.mjs, which fails the suite when one goes stale. That check does not cover prose, so the rule stands for the rest: do not add a claim here you have not run.

What this repository is

An MCP server that routes tool calls to one or more Obsidian vaults over each vault's Local REST API, packaged together with the skills, slash commands, agents and hooks that drive it. Node >=20.19.0, ESM only ("type": "module"), no build step — the source in src/ is what runs.

Layout, all paths relative to the repository root:

Path What lives there
bin/ CLI entry point for the MCP server
src/ Server, tool implementations, helpers
scripts/ Operational CLIs (setup, validation, gates, release)
skills/ The know-how pages — one directory per skill, each with a SKILL.md
commands/ Slash-command definitions
agents/ Sub-agent definitions
hooks/ Session hooks
contracts/ Machine-checked declarations (see below)
templates/ Files copied into vaults during setup
tests/ node:test suites
docs/ Long-form documentation

The three gates

Run all three before claiming anything is finished. They are independent and catch different failures.

Command What it proves
npm test The suites pass.
npm run validate Code, documentation and contracts/skill-capabilities.json tell the same story. A new skill or tool that is not declared fails here.
npm run gate Nothing outside contracts/export-allowlist.json would be published, and no credential or private path is inside what would.

Read the full file on GitHub · 191 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. 7d ago Changed 60f8fb973850
  2. 10d ago First seen · 191 lines · 2,439 tokens per session scan A e674a503a6e0

Subscribe to this mod's changes

obsidian-mcp-router AGENTS.md is an instructions file published in the GitHub repository tboome33/obsidian-mcp-router (1 stars, last pushed today), licensed Apache-2.0. It adds 2,439 tokens to every session, about $0.0122 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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