What is markdown-authoring?

A guide for writing and maintaining Markdown, the plain-text format commonly used for README files and documentation. It covers structure, style rules, linting, and automated checks.

Writing README files and documentation pages, fixing markdownlint errors, defining repository conventions, and setting up automated Markdown validation.

It helps documentation stay consistent and catches formatting problems before they reach a repository. It also explains how to connect Markdown checks to pre-commit hooks and CI pipelines.

markdown-authoring — Skill for Claude Code and Codex by pantheon-org

Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo

git clone --depth 1 https://github.com/pantheon-org/tekhne

agentmods

npx agentmods add skills/pantheon-org/tekhne/markdown-authoring

Made for: Claude Code, 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/pantheon-org/tekhne/markdown-authoring/github.svg)](https://agentmods.dev/skills/pantheon-org/tekhne/markdown-authoring)

Your own site

<a href="https://agentmods.dev/skills/pantheon-org/tekhne/markdown-authoring"><img src="https://agentmods.dev/badge/skills/pantheon-org/tekhne/markdown-authoring/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/skills/pantheon-org/tekhne/markdown-authoring"><img src="https://agentmods.dev/badge/skills/pantheon-org/tekhne/markdown-authoring.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 81 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,038 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. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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	$0.00081	$0.01038
Opus 5	$0.00041	$0.00519
Sonnet 5	$0.00016	$0.00208
Haiku 4.5	$0.00008	$0.00104

Measured 9d ago against content hash 61c74b16ee2f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

markdown-authoring 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 9d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/read-reference.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/documentation/markdown-authoring/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 Authoring

When to Use

Use this skill when the task involves Markdown content, linting, or documentation standards.

When Not to Use

Do not use this skill for non-Markdown document formats (for example .adoc or .rst) unless conversion is part of the task.

Principles

Structure first, wording second.
Keep Markdown lint-clean and deterministic.
Use code fences with explicit language tags.
Keep file-level conventions consistent across the repository.

Deterministic Workflow

Identify document type (README, guide, API doc, changelog).
Apply template and section order from references.
Write content with concise headings and actionable examples.
Run markdownlint locally and fix violations. Re-run until zero errors are reported. If a violation persists: identify the specific rule, fix the source content or apply a narrow, justified inline exception, then re-lint. Do not proceed until lint is clean.
- Lint-fix loop: lint fails → identify rule → fix source or add justified exception → re-lint → proceed only when clean
Validate CI/pre-commit integration for regression prevention.

Quick Commands

Lint all Markdown files

bunx markdownlint-cli2 "**/*.md"

Expected result: no errors for staged or target files.

Lint one skill folder

bunx markdownlint-cli2 "skills/documentation/markdown-authoring/**/*.md"

Expected result: folder-specific Markdown issues reported or zero errors.

Run repository checks

bunx @biomejs/biome check .

Expected result: non-Markdown formatting/lint issues also caught.

Evaluate this skill quality

sh skills/agentic-harness/skill-quality-auditor/scripts/evaluate.sh documentation/markdown-authoring --json

Expected result: updated dimension scores and grade.

Read a specific reference

./scripts/read-reference.sh syntax-headings

Expected result: displays reference content for the requested topic.

Check document style compliance

Read the full file on GitHub · 140 lines

Files

What ships with it

59 files 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.

9d ago First seen · 140 lines · 81 tokens per session scan A 61c74b16ee2f

Subscribe to this mod's changes

markdown-authoring is a skill published in the GitHub repository pantheon-org/tekhne (10 stars, last pushed yesterday), licensed MIT. It adds 81 tokens to every session and 1,038 once invoked, about $0.0004 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 2026-09-03.

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