zmk-layout-shift: Instructions file for Codex

AGENTS.md

zmk-layout-shift AGENTS.md is an instructions file for Codex, OpenCode from kot149/zmk-layout-shift. It costs 201 tokens per session, scanned A, original, MIT.

Repository instructions for developing ZMK keyboard firmware, including required research, project practices, and build verification. ZMK is software for programmable keyboards built on the Zephyr embedded-systems platform.

In plain words
What is it for?
Use it when modifying ZMK keyboard firmware, investigating Zephyr-related behavior, verifying builds, or updating the project documentation.
Why use it?
It sets the checks and documentation steps developers must follow before changing the project.

Instructions file for CodexOpenCode

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

This is kot149/zmk-layout-shift's own configuration. It tells Codex and OpenCode how to work on zmk-layout-shift 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 zmk-layout-shift configures →

Reuse

Borrowing it

Nothing to install: this file belongs to kot149/zmk-layout-shift. 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/kot149/zmk-layout-shift/v2/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/kot149/zmk-layout-shift

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 zmk-layout-shift AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/kot149/zmk-layout-shift/agents-md/github.svg)](https://agentmods.dev/instructions/kot149/zmk-layout-shift/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/kot149/zmk-layout-shift/agents-md"><img src="https://agentmods.dev/badge/instructions/kot149/zmk-layout-shift/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 zmk-layout-shift AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/kot149/zmk-layout-shift/agents-md"><img src="https://agentmods.dev/badge/instructions/kot149/zmk-layout-shift/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 201 This file is loaded in full into every session.
When invoked 201 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 $0.00201 $0.00201
Opus 5.5 $0.00080 $0.00080
Sonnet 5.5 $0.00040 $0.00040
Haiku 4.5 $0.00020 $0.00020

Measured 21d ago against content hash 51f73a3662d9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

zmk-layout-shift 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 · 18 lines

What it actually says

Project Overview

For detailed project overview, features, and usage instructions, please refer to README.md. Update README.md when changes affect features, usage instructions, or implementation status.

Testing

Run available tests relevant to the changed behavior and wait for them to finish. Fix failures caused by the change before completing the task. For bug fixes, add a regression test when practical. For new behavior, test normal cases and relevant edge cases. If automated tests are unavailable or hardware is required, document the manual verification steps and report what was verified and what remains unverified. Documentation-only changes do not require runtime tests.

Branch Strategy

Stable branches use the name v<major> to preserve compatibility with users' west.yml files. For breaking changes, create a stable branch with the next major version. Keep existing stable branches compatible. For non-breaking changes, create a branch from the target stable branch and use its name as the prefix: v<major>-<description>.

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 · -69 lines · -817 tokens per session 51f73a3662d9
  2. 2mo ago First seen · 87 lines · 1,018 tokens per session scan A a50338833a7f

Subscribe to this mod's changes

zmk-layout-shift AGENTS.md is an instructions file published in the GitHub repository kot149/zmk-layout-shift (18 stars, last pushed yesterday), licensed MIT. It adds 201 tokens to every session, about $0.0008 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 2026-09-01.

Related

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