Memacs: Instructions file for Codex

AGENTS.md

Memacs AGENTS.md is an instructions file for Codex, OpenCode from novoid/Memacs. It costs 2,975 tokens per session, scanned A, original, GPL-3.0.

A project guide for developing Memacs modules, including the framework rules and the base class that modules should reuse. It explains what to read before adding or changing a module.

In plain words
What is it for?
Use it before creating or modifying a Memacs module to understand the repository layout, required reading, and how to build on memacs.lib.memacs.memacs.
Why use it?
It reduces the risk of breaking the framework contract or duplicating code that already belongs in the shared base class. It also points agents to the repository's required orientation material.

Instructions file for CodexOpenCode

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

This is novoid/Memacs's own configuration. It tells Codex and OpenCode how to work on Memacs 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 Memacs configures →

About the project

Memacs is an Emacs and Org-mode tool for organizing and visualizing records from a person’s digital life. It helps users search and review information such as email, files, Git history, and filesystem data.

novoid/Memacs · 1,118 stars · on GitHub

Reuse

Borrowing it

Nothing to install: this file belongs to novoid/Memacs. 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/novoid/Memacs/master/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/novoid/Memacs

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 Memacs AGENTS.md

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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Per session 2,975 This file is loaded in full into every session.
When invoked 2,975 The same file — it is already loaded in full.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.02975 $0.02975
Opus 5.5 $0.01190 $0.01190
Sonnet 5.5 $0.00595 $0.00595
Haiku 4.5 $0.00298 $0.00298

Measured 2mo ago against content hash 26f9775eed42, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Memacs AGENTS.md scanned grade A with 1 finding 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 2mo 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

- **An external CLI tool** → `subprocess.check_output(...)`, but
AGENTS.md · 260 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 2mo ago First seen · 260 lines · 2,975 tokens per session scan A 26f9775eed42

Subscribe to this mod's changes

Memacs AGENTS.md is an instructions file published in the GitHub repository novoid/Memacs (1,118 stars, last pushed 5mo ago), licensed GPL-3.0. It adds 2,975 tokens to every session, about $0.0119 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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