What is reboot-cms AGENTS.md?

A set of instructions for coding agents working on Reboot CMS, a database-free PHP content-management system where pages are stored as Markdown or PHP files.

Use it to navigate and modify Reboot CMS projects, including pages, content blocks, add-ons, templates, configuration, web assets, and tests.

It gives an agent the project’s layout and routing rules, reducing the chance of editing the wrong files or misunderstanding how URLs and content work.

How shaack/reboot-cms configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to shaack/reboot-cms. 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/shaack/reboot-cms/distrib/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/shaack/reboot-cms

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/shaack/reboot-cms/agents-md/github.svg)](https://agentmods.dev/instructions/shaack/reboot-cms/agents-md)

Your own site

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

Per session 1,227 This file is loaded in full into every session.

When invoked 1,227 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.

Model	Per session	Once invoked
Fable 5.1	$0.01227	$0.01227
Opus 5.5	$0.00491	$0.00491
Sonnet 5.5	$0.00245	$0.00245
Haiku 4.5	$0.00123	$0.00123

Measured today against content hash 71f7dc2fca20, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

reboot-cms 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 today.

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 · 131 lines

How it starts

The opening of the file, as written. The whole thing — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Guidance for AI coding agents working in a Reboot CMS project.

This file is a condensed orientation. For the full reference — installation, configuration, addons, blocks and multilingual navigation — read the project's README.md in full before making non-trivial changes.

What this is

Reboot CMS is a flat-file, database-free CMS in PHP. Content is plain Markdown, pages render through optional blocks, and every URL maps directly to a file. There is no database, no schema, and no build step for content.

Project layout

core/src/Shaack/ — CMS core classes (Reboot, Site, Page, Block, Request, AddOn, AddOnLoader)
core/addons/<Name>/ — AddOns shipped with the CMS (EmailObfuscation, LanguageRedirect, ProtectedAreas, SecureDownloads), one folder each
core/admin/ — admin interface (itself a Reboot CMS site)
site/ — the site you edit:
- pages/ — content pages (.md or .php)
- blocks/ — PHP templates for content blocks
- addons/<Name>/<Name>.php — site-specific addons, one folder each with optional src/ and admin/
- template.php — main HTML template
- config.yml — navigation, addon registration, multilingual settings
web/ — document root (index.php, static assets)
local/ — environment config (config.yml, .htpasswd) — not in Git
tests/ — test suite

Routing: file = URL

A request path maps straight onto site/pages/:

/ → pages/index.md
/about → pages/about.md
/howto/git → pages/howto/git.md
a folder is served by its index.md

To find a page's source, append the URL path to site/pages/. To add a page, create the file — no route registration needed. A .php page is used when no .md exists at that path.

Pages

A page is Markdown. Optional YAML frontmatter at the top sets metadata:

---
title: About
hide-nav: true
---

Templates read it with $page->meta('title', 'Default'), escaped for HTML; $page->meta('key', null, false) returns a string unescaped.

Read the full file on GitHub · 131 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.

today Changed · +2 lines · +29 tokens per session 71f7dc2fca20
19d ago Changed · +1 lines · +37 tokens per session 211c75543a91
21d ago Changed · +63 tokens per session de0610c29ca9
23d ago Changed · +1 lines · +55 tokens per session 1e4e844e9e94
2mo ago First seen · 127 lines · 1,043 tokens per session scan A 53a5105f6972

Subscribe to this mod's changes

reboot-cms AGENTS.md is an instructions file published in the GitHub repository shaack/reboot-cms (51 stars, last pushed yesterday), licensed MIT. It adds 1,227 tokens to every session, about $0.0049 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 2026-08-30.

Backend and APIs PHP cms flat-file-cms markdown markdown-cms no-database

reboot-cms AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
reboot-cms AGENTS.mdshaack/reboot-cms	Instructions file	51	yesterday	MIT	A	1,227	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

reboot-cms: Instructions file for Codex