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.
git clone --depth 1 https://github.com/ngocsangyem/MeowKitnpx agentmods add skills/ngocsangyem/meowkit/markdown-readerWrote 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.
[](https://agentmods.dev/skills/ngocsangyem/meowkit/markdown-reader)<a href="https://agentmods.dev/skills/ngocsangyem/meowkit/markdown-reader"><img src="https://agentmods.dev/badge/skills/ngocsangyem/meowkit/markdown-reader/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.
<a href="https://agentmods.dev/skills/ngocsangyem/meowkit/markdown-reader"><img src="https://agentmods.dev/badge/skills/ngocsangyem/meowkit/markdown-reader.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00789 |
| Opus 5.5 | $0.00032 | $0.00316 |
| Sonnet 5.5 | $0.00016 | $0.00158 |
| Haiku 4.5 | $0.00008 | $0.00079 |
Grade A, and why
mk:markdown-reader 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 2mo 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 — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.
mk:markdown-reader
Local HTTP server rendering markdown files with a calm, book-like reading experience.
Note: mk:brainstorming --html and mk:plan-creator --html produce self-contained
HTML files that open directly in the browser — they do not use or need this server.
Installation (Required Before First Use)
This skill requires npm dependencies. Install once from the project root:
cd .claude/skills/markdown-reader
npm install
Dependencies: marked, highlight.js, gray-matter
Without installation you will get Error 500: Error rendering markdown.
Usage
# View a markdown file (opens browser automatically)
node .claude/skills/markdown-reader/scripts/server.cjs \
--file ./tasks/plans/my-plan/plan.md
# Browse a directory
node .claude/skills/markdown-reader/scripts/server.cjs \
--dir ./tasks/plans
# Background mode (foreground process for Claude Code task runners)
node .claude/skills/markdown-reader/scripts/server.cjs \
--file ./README.md \
--foreground
# Stop all running instances
node .claude/skills/markdown-reader/scripts/server.cjs --stop
The server binds to 127.0.0.1 (localhost) only. Served files are not reachable from
other devices on the network — this is intentional.
Lifecycle
Start with --file or --dir; use --foreground when the host needs to keep the process
attached. The default port is 3456 and increments through 3500 if busy. End the lifecycle with
--stop; never leave a reader process running after the task.
| Need | Route |
|---|---|
| CLI flags, routes, persistent state | references/reader-operations.md |
| Reader features, plan navigation, shortcuts, Mermaid | references/reader-experience.md |
| Architecture and troubleshooting | references/reader-operations.md |
The server binds only to 127.0.0.1. It validates every file against its allowed directories;
traversal attempts return 403. Referenced images must be relative to the source markdown file.
What ships with it
24 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.
- assets/directory-browser.css 2.9 KB
- assets/favicon.ico 15 KB
- assets/novel-theme.css 612 B
- assets/reader.js 26 KB runs code
- assets/styles/novel-theme-base.css 1013 B
- assets/styles/novel-theme-components.css 3.8 KB
- assets/styles/novel-theme-content.css 2.9 KB
- assets/styles/novel-theme-header.css 3.9 KB
- assets/styles/novel-theme-mermaid.css 3.1 KB
- assets/styles/novel-theme-overlays.css 3.6 KB
- assets/styles/novel-theme-responsive.css 4.5 KB
- assets/styles/novel-theme-sidebar.css 6.2 KB
- assets/styles/novel-theme-variables.css 1.4 KB
- assets/template.html 6.0 KB
- package.json 368 B
- references/reader-experience.md 625 B
- references/reader-operations.md 1.1 KB
- scripts/lib/http-server.cjs 11 KB runs code
- scripts/lib/markdown-renderer.cjs 9.7 KB runs code
- scripts/lib/plan-navigator.cjs 10 KB runs code
- scripts/lib/plan-table-parser.cjs 9.9 KB runs code
- scripts/lib/port-finder.cjs 1.2 KB runs code
- scripts/lib/process-mgr.cjs 3.7 KB runs code
- scripts/server.cjs 9.6 KB runs code
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.
- 2mo ago First seen · 88 lines · 81 tokens per session scan A 532843676829
mk:markdown-reader is a skill published in the GitHub repository ngocsangyem/MeowKit (15 stars, last pushed 5d ago), licensed MIT. It adds 81 tokens to every session and 789 once invoked, about $0.0003 per session on Opus 5.5. 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.
mk:markdown-reader compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| mk:markdown-readerngocsangyem/MeowKit | Skill | 15 | 5d ago | MIT | A | 81 | Claude Code |
| url-to-pdftoolshedlabs-hash/web-access-skills | Skill | 0 | 3mo ago | MIT | A | 138 | Claude Code, Codex |
| document_exportXSpoonAi/spoon-bot | Skill | 5 | 1mo ago | none | A | 20 | Claude Code, Codex |
| code-to-diagramzebbern/claude-code-guide | Skill | 4.7k | 3d ago | MIT | A | 74 | Claude Code, Codex |
| firecrawl-build-interactfirecrawl/firecrawl | Skill | 199k | today | AGPL-3.0 | A | 56 | Claude Code, Codex |
| processing-markdownharehare/mq | Skill | 1.1k | yesterday | MIT | A | 36 | Claude Code, Codex |
| web-scrapingharehare/mq | Skill | 1.1k | yesterday | MIT | A | 89 | Claude Code, Codex |