What is dotfiles AGENTS.md?

Repository instructions for a personal Ubuntu configuration collection, including shell, editor, terminal multiplexer, Git, and Python settings. It explains the important files and the scripts used to install them as links into the home folder.

Use it when editing Ubuntu development configuration, Neovim or tmux settings, shell scripts, Git configuration, or Python startup files.

It helps an agent understand an unfamiliar dotfiles repository and follow its existing setup process. This avoids changing the wrong configuration or using the wrong Python and shell tools.

How treyhunner/dotfiles configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to treyhunner/dotfiles. 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/treyhunner/dotfiles/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/treyhunner/dotfiles

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/treyhunner/dotfiles/agents-md/github.svg)](https://agentmods.dev/instructions/treyhunner/dotfiles/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/treyhunner/dotfiles/agents-md"><img src="https://agentmods.dev/badge/instructions/treyhunner/dotfiles/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/treyhunner/dotfiles/agents-md"><img src="https://agentmods.dev/badge/instructions/treyhunner/dotfiles/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 835 This file is loaded in full into every session.

When invoked 835 The same file — it is already loaded in full.

Security scan B 1 finding. 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.

Model	Per session	Once invoked
Fable 5.1	$0.00835	$0.00835
Opus 5.5	$0.00334	$0.00334
Sonnet 5.5	$0.00167	$0.00167
Haiku 4.5	$0.00084	$0.00084

Measured 2mo ago against content hash d5d646e65b76, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

dotfiles AGENTS.md scanned grade B 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- Assumes Ubuntu with sudo access

AGENTS.md · 69 lines

How it starts

The opening of the file, as written. The whole thing — 69 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

For AI coding agents working in this dotfiles repository.

Context

Personal dotfiles for Ubuntu development environment (zsh, Neovim, tmux, Python tooling)
Uses symlinks from ~/.dotfiles/ to $HOME for all configs
Assumes Ubuntu with sudo access

Key Paths

Shell: zshrc, profile, zprofile - zsh primary shell
Editor: config/nvim/init.vim - Neovim config with vim-plug, ALE linting
Tmux: tmux.conf - Uses C-a prefix (not C-b), TPM plugins
Git: gitconfig, gitignore
Python: startup.py - PYTHONSTARTUP file for interactive sessions
Scripts: bin/ - Custom utilities (comma-prefixed for personal tools)

Automation

./scripts/install - Creates symlinks from this repo to $HOME
./scripts/additional_install - Installs system packages and CLI tools (uv, direnv, starship, just, fnm, hub, pyenv, docker, etc.)
bin/ scripts use #!/usr/bin/env -S uv run --quiet --script with PEP 723 inline dependencies
Key tools: uv (Python pkg mgr), direnv (env activation), starship (prompt), just (command runner), fnm (Node mgr)

Python Workflow

Create venv: venv [name] - Uses uv, creates .envrc, registers in ~/.projects
Switch project: workon <project> - cd to directory from ~/.projects mapping
Auto-activation: direnv triggers on cd to directories with .envrc
Version mgmt: pyenv controls Python versions, default in pyenv/version
Virtual envs: Located in project dirs (not centralized), activated via direnv
See zshrc:61-145 for venv and workon function implementations

Editor & Tmux

Neovim (config/nvim/init.vim):

Leader: SPACE, Local leader: \
Save: ENTER, Clear search: SPACE-SPACE
Toggle teaching mode: Shift-H (disables linting, spellcheck, status line)
Plugins: ALE (ruff/flake8/black), CtrlP (fuzzy find with ag), vim-fugitive, vim-gitgutter, vim-surround
Python host: ~/.virtualenvs/neovim/bin/python

Tmux (tmux.conf):

Prefix: C-a (not default C-b)
Session mgmt: tmuxstart command for creating/attaching sessions
Window/pane indexing starts at 1

Read the full file on GitHub · 69 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.

2mo ago First seen · 69 lines · 835 tokens per session scan B d5d646e65b76

Subscribe to this mod's changes

dotfiles AGENTS.md is an instructions file published in the GitHub repository treyhunner/dotfiles (51 stars, last pushed 7mo ago), licensed CC0-1.0. It adds 835 tokens to every session, about $0.0033 per session on Opus 5.5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-01.

DevOps and cloud Languages Python

dotfiles AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
dotfiles AGENTS.mdtreyhunner/dotfiles	Instructions file	51	7mo ago	CC0-1.0	B	835	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

dotfiles: Instructions file for Codex