PrompterOne: Skill for Codex

.codex/skills/mcaf-documentation/SKILL.md

mcaf-documentation is a skill for Codex from managedcode/PrompterOne. It costs 53 tokens per session (793 once invoked), scanned A, a copy of dotnet-mcaf-documentation, MIT.

A documentation workflow for creating or improving lasting engineering guidance. It covers where information should live, how pages should link to one another, and how to keep the documentation accurate and readable.

In plain words
What is it for?
Use it to reorganize documentation, choose canonical locations for facts, improve navigation, update stale guidance, and add focused engineering instructions.
Why use it?
It addresses missing, outdated, duplicated, or difficult-to-find documentation. Choosing one source of truth reduces conflicting instructions and unnecessary repetition.

Skill for Codex

Written for Codex: installed under .codex/. Also seen: mentions AGENTS.md.

This is managedcode/PrompterOne's own configuration. It tells Codex how to work on PrompterOne 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 PrompterOne configures →

Reuse

Borrowing it

Nothing to install: this file belongs to managedcode/PrompterOne. 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/managedcode/PrompterOne/main/.codex/skills/mcaf-documentation/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/managedcode/PrompterOne

Made for: Codex.

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 mcaf-documentation

README.md
[![agentmods](https://agentmods.dev/badge/skills/managedcode/prompterone/mcaf-documentation/github.svg)](https://agentmods.dev/skills/managedcode/prompterone/mcaf-documentation)
Your own site
<a href="https://agentmods.dev/skills/managedcode/prompterone/mcaf-documentation"><img src="https://agentmods.dev/badge/skills/managedcode/prompterone/mcaf-documentation/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 mcaf-documentation

Your own site · 80×15
<a href="https://agentmods.dev/skills/managedcode/prompterone/mcaf-documentation"><img src="https://agentmods.dev/badge/skills/managedcode/prompterone/mcaf-documentation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 793 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 92% copy Near-identical to another mod 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 $0.00053 $0.00793
Opus 5.5 $0.00021 $0.00317
Sonnet 5.5 $0.00011 $0.00159
Haiku 4.5 $0.00005 $0.00079

Measured 1mo ago against content hash 20803f6cacb4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcaf-documentation 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 1mo 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.

Origin

This is a copy

92% identical to dotnet-mcaf-documentation — 4 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.codex/skills/mcaf-documentation/SKILL.md · 97 lines

How it starts

The opening of the file, as written. The whole thing — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MCAF: Documentation

Trigger On

  • docs are missing, stale, duplicated, or hard to navigate
  • a repo needs a cleaner source-of-truth structure
  • durable engineering guidance needs to be added without bloating pages

Value

  • produce a concrete project delta: code, docs, config, tests, CI, or review artifact
  • reduce ambiguity through explicit planning, verification, and final validation skills
  • leave reusable project context so future tasks are faster and safer

Do Not Use For

  • writing a specific feature spec or ADR when that skill already fits
  • dumping large template content into public pages

Inputs

  • current docs structure and entry pages
  • the code, policy, or workflow that the docs should reflect
  • duplicate or conflicting sources of truth

Quick Start

  1. Read the nearest AGENTS.md and confirm scope and constraints.
  2. Run this skill's Workflow through the Ralph Loop until outcomes are acceptable.
  3. Return the Required Result Format with concrete artifacts and verification evidence.

Workflow

  1. Decide the canonical location for each fact before writing.
  2. Prefer navigational docs that link to detail instead of copying detail.
  3. Keep bootstrap pages small; move workflow scaffolds into skills.
  4. Update stale docs in the same change as the code or policy they describe.

Deliver

  • cleaner docs structure
  • better source-of-truth placement
  • docs that reflect the code and workflow that actually exist

Validate

  • each durable fact has one clear home
  • entry pages route the reader correctly
  • pages do not bloat with template or reference dumps
  • docs match the real repo, not the intended future repo

Ralph Loop

Use the Ralph Loop for every task, including docs, architecture, testing, and tooling work.

  1. Brainstorm first (mandatory):
    • analyze current state
    • define the problem, target outcome, constraints, and risks
    • generate options and think through trade-offs before committing
    • capture the recommended direction and open questions
  2. Plan second (mandatory):
    • write a detailed execution plan from the chosen direction
    • list final validation skills to run at the end, with order and reason
  3. Execute one planned step and produce a concrete delta.
  4. Review the result and capture findings with actionable next fixes.
  5. Apply fixes in small batches and rerun the relevant checks or review steps.
  6. Update the plan after each iteration.
  7. Repeat until outcomes are acceptable or only explicit exceptions remain.
  8. If a dependency is missing, bootstrap it or return status: not_applicable with explicit reason and fallback path.

Read the full file on GitHub · 97 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 1mo ago First seen · 97 lines · 53 tokens per session scan A 20803f6cacb4

Subscribe to this mod's changes

mcaf-documentation is a skill published in the GitHub repository managedcode/PrompterOne (45 stars, last pushed 5mo ago), licensed MIT. It adds 53 tokens to every session and 793 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 92% identical to dotnet-mcaf-documentation, differing in 4 lines, and is treated as a copy.

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