obsidian-wiki: Instructions file for Codex

AGENTS.md

obsidian-wiki AGENTS.md is an instructions file for Codex, OpenCode from MykytaMorachovEpam/obsidian-wiki. It costs 4,935 tokens per session, scanned A, original, MIT.

A rulebook for maintaining a personal knowledge wiki in an Obsidian vault. Obsidian is a note-taking app that stores linked Markdown files, and a vault is its folder of notes.

In plain words
What is it for?
Use it when adding sources, summarizing knowledge, updating related pages, recording contradictions, or producing query results in the specified vault folders.
Why use it?
It gives an AI agent a consistent way to turn source material into linked, evolving notes without altering the original sources. It also separates raw sources, maintained wiki pages, and generated output.

Instructions file for CodexOpenCode

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

This is MykytaMorachovEpam/obsidian-wiki's own configuration. It tells Codex and OpenCode how to work on obsidian-wiki 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-wiki configures →

Reuse

Borrowing it

Nothing to install: this file belongs to MykytaMorachovEpam/obsidian-wiki. 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/MykytaMorachovEpam/obsidian-wiki/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/MykytaMorachovEpam/obsidian-wiki

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.

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README.md
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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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/mykytamorachovepam/obsidian-wiki/agents-md"><img src="https://agentmods.dev/badge/instructions/mykytamorachovepam/obsidian-wiki/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 4,935 This file is loaded in full into every session.
When invoked 4,935 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 $0.04935 $0.04935
Opus 5 $0.02468 $0.02468
Sonnet 5 $0.00987 $0.00987
Haiku 4.5 $0.00494 $0.00494

Measured 11d ago against content hash 0ff9cc739e91, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

obsidian-wiki 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 11d 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 · 561 lines

How it starts

The opening of the file, as written. The whole thing — 561 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AI-Wiki Schema

Version: 1.0.0 | Last Updated: 2026-04-15

You are an AI agent maintaining a personal knowledge wiki inside an Obsidian vault. This document defines the wiki's structure, conventions, and workflows. Follow it precisely.


1. Overview

This vault is a persistent, compounding knowledge base. You (the LLM) incrementally build and maintain a structured, interlinked collection of markdown files. When the user adds a new source, you don't just index it — you read it, extract key information, and integrate it into the existing wiki: updating entity pages, revising topic summaries, noting contradictions, and strengthening the evolving synthesis.

Your role: Summarize, cross-reference, file, and maintain. You own the vault/wiki/ and vault/output/ directories entirely. The human's role: Curate sources, direct analysis, ask questions, and make decisions on contradictions.

Three Layers

Layer Path Owner Mutability
Raw Sources vault/raw/ Human Read-only — never modify
Wiki vault/wiki/ You (LLM) You create, update, and maintain everything
Output vault/output/ You (LLM) Query results and lint reports

2. Directory Structure

Agentic configuration lives at the repo root (AGENTS.md, CLAUDE.md, .claude/, .kiro/). The vault holds only content:

vault/
├── raw/                               # Immutable source documents
│   ├── assets/                        # Downloaded images (Obsidian Web Clipper)
│   └── {source files}                 # Markdown, PDF, DOCX, Excel, HTML, images
├── wiki/                              # LLM-maintained knowledge base
│   ├── _master-index.md               # Categorized catalog of ALL wiki pages
│   ├── log.md                         # Append-only operation log
│   └── {category}/                    # Dynamic topic subdirectories
│       ├── _index.md                  # Category-level index
│       └── {page}.md                  # Individual wiki pages
└── output/                            # Query results and reports
    ├── query-results/                 # Saved query answers
    └── lint-reports/                  # Lint health check reports

Read the full file on GitHub · 561 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. 11d ago First seen · 561 lines · 4,935 tokens per session scan A 0ff9cc739e91

Subscribe to this mod's changes

obsidian-wiki AGENTS.md is an instructions file published in the GitHub repository MykytaMorachovEpam/obsidian-wiki (10 stars, last pushed 4mo ago), licensed MIT. It adds 4,935 tokens to every session, about $0.0247 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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