obsidian-semantic-mcp: Instructions file for Codex

AGENTS.md

obsidian-semantic-mcp AGENTS.md is an instructions file for Codex, OpenCode from artificemachine/obsidian-semantic-mcp. It costs 356 tokens per session, scanned A, original, Apache-2.0.

A project instruction file for obsidian-semantic-mcp, a Python command-line project that provides semantic search for Obsidian. It defines project identity, shared work rules, and installation requirements.

In plain words
What is it for?
Use it when agents work on this project and need instructions for reading its contract, updating task handoffs, and keeping installations independent.
Why use it?
It keeps coding agents aligned on the repository’s terminology, coordination process, and rule that installed software must not depend on the source checkout.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

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

Reuse

Borrowing it

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

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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Your own site
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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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<a href="https://agentmods.dev/instructions/artificemachine/obsidian-semantic-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/artificemachine/obsidian-semantic-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 356 This file is loaded in full into every session.
When invoked 356 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 $0.00356 $0.00356
Opus 5.5 $0.00142 $0.00142
Sonnet 5.5 $0.00071 $0.00071
Haiku 4.5 $0.00036 $0.00036

Measured 21d ago against content hash 6103437f786a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

obsidian-semantic-mcp 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 21d 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 · 25 lines

What it actually says

obsidian-semantic-mcp

Identity

You are working for the project owner.

This Project

  • What: obsidian-semantic-mcp
  • Stack: Python (uv)
  • Status: active development (version lives in pyproject.toml and the deployed image tag — don't duplicate in agent homes)
  • Terminology: osm means the Obsidian Semantic MCP CLI (osm init, osm dashboard, etc.), not OpenStreetMap.

caasiopeia, obsidian-semantic-mcp and tessera-mcp work together. CaaSiopeia is the shared retrieval engine: the other two call it, and it calls neither of them.

  • obsidian-semantic-mcp: search_vault delegates ranking to CaaSiopeia when OSM_RETRIEVAL_BACKEND=caasiopeia. Its file tools (get_file, write_file, append_content, recent_changes) act on the vault directly.
  • tessera-mcp: pushes extracted non-markdown documents into CaaSiopeia, and its search and show always query CaaSiopeia. Details: docs/ARCH-caasiopeia-obsidian-tessera-relations.md.

Cross-Agent Protocol

  • Read .superharness/contract.yaml before starting work.
  • Keep task status, ledger, and handoff updated before stopping.

Strict Installation Decoupling

Once installed (e.g., to /.local/bin), the project binary must NEVER depend on the local repository path for execution, configuration, or data. All paths must be relative to the installation root or use standard system config paths (/.config).

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. 21d ago Changed · +6 lines · +170 tokens per session 6103437f786a
  2. 1mo ago First seen · 19 lines · 186 tokens per session scan A 5231dcd6ff9d

Subscribe to this mod's changes

obsidian-semantic-mcp AGENTS.md is an instructions file published in the GitHub repository artificemachine/obsidian-semantic-mcp (2 stars, last pushed 8d ago), licensed Apache-2.0. It adds 356 tokens to every session, about $0.0014 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 2026-08-31.

Related

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