markdown-formatting

markdown-formatting is a skill for Claude Code, Codex from britt/agent-skills. It costs 42 tokens per session (780 once invoked), scanned A, original, MIT.

A set of rules for writing consistent Markdown, the plain-text format used for documents such as READMEs, issues, and pull requests.

In plain words
What is it for?
Use it when preparing documentation, pull-request descriptions, issue reports, notes, or other published Markdown files.
Why use it?
It keeps structured technical writing readable and consistent across headings, lists, code blocks, links, and templates.

Skill for Claude CodeCodex

Part of the agent-skills plugin — 28 skills shipped together

Install

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.

agentmods
npx agentmods add skills/britt/agent-skills/markdown-formatting
Any agent
npx skills add britt/agent-skills --skill markdown-formatting
Clone the repo
git clone --depth 1 https://github.com/britt/agent-skills

Made for: Claude Code, Codex.

Or install agent-skills, the plugin that ships this one along with the rest of its 28 skills.

Its marketplace also offers this one on its own, as the plugin markdown-formatting/plugin install markdown-formatting after adding the marketplace above.

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 markdown-formatting

README.md
[![agentmods](https://agentmods.dev/badge/skills/britt/agent-skills/markdown-formatting.svg)](https://agentmods.dev/skills/britt/agent-skills/markdown-formatting)
Your own site
<a href="https://agentmods.dev/skills/britt/agent-skills/markdown-formatting"><img src="https://agentmods.dev/badge/skills/britt/agent-skills/markdown-formatting.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 780 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00042 $0.00780
Opus 5 $0.00021 $0.00390
Sonnet 5 $0.00008 $0.00156
Haiku 4.5 $0.00004 $0.00078

Measured 4d ago against content hash 8c5f427c6ae4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

markdown-formatting 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 4d 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.

skills/markdown-formatting/SKILL.md · 140 lines

How it starts

The opening of the file, as written. The whole thing — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Markdown Formatting Skill

Apply consistent Markdown formatting to all outputs. Structure content for readability and professionalism.

When to Use

Activate when producing:

  • PR descriptions and issue bodies
  • Documentation and guides
  • Notes and summaries
  • Structured artifacts that will be saved or published (reports, READMEs, changelogs)

Not for conversational chat replies — normal responses don't need templates or strict formatting rules.

Core Principles

  1. Lead with the point - TL;DR or summary first, details after
  2. Use structure - Headings, lists, and whitespace aid scanning
  3. Be consistent - Same patterns across all outputs
  4. Respect context - PRs need checklists, docs need examples

Formatting Rules

Document Structure

# Title (standalone documents only)

Brief summary or TL;DR (1-2 sentences)

## Section Heading

Content organized by topic...

Headings

  • Use ## for main sections (reserve # for document title)
  • Use ### sparingly for subsections
  • Never skip levels (no ## to ####)

Lists

  • Use - for unordered lists (not *)
  • Use 1. for ordered/sequential steps
  • Nest with 2-space indent
  • Keep list items parallel in structure

Code

  • Inline: backticks for commands, filenames, variables
  • Blocks: triple backticks with language identifier
  • Always specify language: typescript, bash, ```json

Emphasis

  • Bold for key terms, warnings, important points
  • Italics sparingly for emphasis or introducing terms
  • Never combine bold and italics

Links

  • Descriptive text: [installation guide](url) not [click here](url)
  • Reference issues/PRs with #123 format

Templates

PR Description

## Summary

[One-line description of the change]

## Changes

- [Change 1]
- [Change 2]

## Test Plan

- [ ] [Test case 1]
- [ ] [Test case 2]

Issue Body

## Problem

[What is wrong or missing]

## Steps to Reproduce

1. [Step 1]
2. [Step 2]

## Expected

[What should happen]

## Actual

[What actually happens]

Read the full file on GitHub · 140 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.

  1. 4d ago First seen · 140 lines · 42 tokens per session scan A 8c5f427c6ae4

Subscribe to this mod's changes

markdown-formatting is a skill published in the GitHub repository britt/agent-skills (5 stars, last pushed 2d ago), licensed MIT. It adds 42 tokens to every session and 780 once invoked, about $0.0002 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 2026-08-31.

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