compact-markdown

compact-markdown is a skill for Claude Code, Codex from MithunWijayasiri/dotclaude. It costs 85 tokens per session (819 once invoked), scanned A, original, MIT.

A compact writing style for Markdown files, especially instruction and documentation files read by coding agents.

In plain words
What is it for?
Use it when creating or editing Markdown files such as skills, rules, feature specifications, design notes, and guides, except README files.
Why use it?
It removes filler and keeps documents short and easy to scan while preserving information that matters.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions CLAUDE.md.

Good fit Use it when creating or editing Markdown files such as skills, rules, feature specifications, design notes, and guides, except README files.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mithunwijayasiri/dotclaude/compact-markdown
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.

Any agent
npx skills add MithunWijayasiri/dotclaude --skill compact-markdown
Clone the repo
git clone --depth 1 https://github.com/MithunWijayasiri/dotclaude

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.

agentmods badge for compact-markdown

README.md
[![agentmods](https://agentmods.dev/badge/skills/mithunwijayasiri/dotclaude/compact-markdown/github.svg)](https://agentmods.dev/skills/mithunwijayasiri/dotclaude/compact-markdown)
Your own site
<a href="https://agentmods.dev/skills/mithunwijayasiri/dotclaude/compact-markdown"><img src="https://agentmods.dev/badge/skills/mithunwijayasiri/dotclaude/compact-markdown/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 compact-markdown

Your own site · 80×15
<a href="https://agentmods.dev/skills/mithunwijayasiri/dotclaude/compact-markdown"><img src="https://agentmods.dev/badge/skills/mithunwijayasiri/dotclaude/compact-markdown.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 85 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 819 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 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 5.1 $0.00085 $0.00819
Opus 5 $0.00043 $0.00409
Sonnet 5 $0.00017 $0.00164
Haiku 4.5 $0.00009 $0.00082

Measured 9d ago against content hash 47d5f5debea1, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

compact-markdown 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.

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/compact-markdown/SKILL.md · 90 lines

How it starts

The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Compact Markdown

Markdown docs here exist for AI agents, not human reading pleasure. Write content only. No filler, no scaffolding.

Scope

  • Apply to any .md being created or edited — except README.md (skip this skill entirely for README.md).
  • Apply only to content you write or edit. Do not rewrite existing surrounding prose you weren't asked to touch.
  • Human-facing prose in .md (a doc written for people, not agents) → use humanize instead.
  • Compress wording; keep markdown valid and navigable.
  • Authoring a SKILL.md? Read references/skill-authoring.md for skill-specific rules (frontmatter, triggering, what not to compact).

Core rule

Telegraphic. Drop articles, filler verbs, and pronouns where meaning survives.

  • "You should run the command before testing" → "Run command before testing."
  • "This function is responsible for parsing the config" → "Parses config."
  • "In order to do X, you need to do Y" → "X requires Y."
  • Imperative fragments are fine: "Fail → check trace." "No output → test passed."

Judgment overrides compression. Never compress if it loses important info. When in doubt, keep the words.

Strip

  • Emojis, Badges.
  • Filler headers — empty ## Overview / ## Introduction whose body just restates the title. Collapse into actual content or open straight with facts.
  • Congratulatory / motivational lines — "Great!", "Congrats!", "That's it!", "Happy coding!", "Now you're ready to...".
  • Hedging and throat-clearing — "It's worth noting that", "Basically", "Simply", "Of course", "As you can see".
  • Restating the prompt or the section title in the first sentence.
  • Summary / Conclusion sections that only restate the doc. Keep summaries that capture decisions, risks, or takeaways.
  • Table of contents for docs short enough to scan.
  • Bold on every other phrase — everything emphasized = nothing emphasized.
  • Horizontal rules (---) between every section.

Keep

  • Code blocks, inline code, CLI commands — verbatim, never paraphrased.
  • Examples and sample snippets — they carry the most signal per token. Drop only a duplicate/low-value example, never a useful one.
  • Tables — keep structured, do not flatten into prose.
  • Heading hierarchy — keep for navigation. Just cut filler headers.
  • Any concrete detail: paths, flags, names, values, edge cases, gotchas.

Read the full file on GitHub · 90 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. 9d ago First seen · 90 lines · 85 tokens per session scan A 47d5f5debea1

Subscribe to this mod's changes

compact-markdown is a skill published in the GitHub repository MithunWijayasiri/dotclaude (2 stars, last pushed 4d ago), licensed MIT. It adds 85 tokens to every session and 819 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 2026-08-31.

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