Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/shaack/reboot-cms/agents-mdgit clone --depth 1 https://github.com/shaack/reboot-cmsWhat 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 | $0.01043 | $0.01043 |
| Opus 5 | $0.00522 | $0.00522 |
| Sonnet 5 | $0.00209 | $0.00209 |
| Haiku 4.5 | $0.00104 | $0.00104 |
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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 127 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)core/admin/— admin interface (itself a Reboot CMS site)site/— the site you edit:pages/— content pages (.mdor.php)blocks/— PHP templates for content blocksaddons/— site-specific addon classestemplate.php— main HTML templateconfig.yml— navigation, addon registration, multilingual settings
web/— document root (index.php, static assets)local/— environment config (config.yml,.htpasswd) — not in Gittests/— 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
---
A page is split into blocks with HTML comments. Without any block comment
the whole file renders as a single text block:
<!-- hero -->
# Welcome
<!-- text -->
Some content.
Blocks
Each block name maps to site/blocks/{name}.php. A block template is plain PHP
and receives a $block object — $block->content(), $block->xpath(),
$block->getConfig(). Adding a block type means adding one PHP file; there is
no framework or build step in between.
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.
- 2d ago First seen · 127 lines · 1,043 tokens per session scan A 53a5105f6972
reboot-cms AGENTS.md is an instructions file published in the GitHub repository shaack/reboot-cms (50 stars, last pushed 19d ago), licensed MIT. It adds 1,043 tokens to every session, about $0.0052 per session on Opus 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.
Other instructions, from other repositories
markdown-site CLAUDE.md
Instructions for waynesutton/markdown-site, covering claude.md, project context, quick start, commands and default and legacy modes.
Cecil AGENTS.md
AGENTS.md instructions for Cecilapp/Cecil, covering cecil - agent instructions, start here, critical commands, architecture at a glance and coding conventions.
Cecil php-src.instructions.md
PHP source rules for Cecil. Use when editing PHP files in src/, enforcing PSR-12, stricttypes, required Cecil header, and native function prefixing.
Cecil copilot-instructions.md
Copilot instructions for Cecilapp/Cecil: Canonical agent instructions are maintained in AGENTS.md.
markdown-site AGENTS.md
Instructions for waynesutton/markdown-site, covering agents.md, project overview, default and legacy modes, current status and tech stack.
NavoCMS AGENTS.md
AGENTS.md instructions for Tsumibito/NavoCMS, covering navocms agent contract, product invariants, contract changes and working practices.