readmd-code-review

A code-review skill for code blocks inside Markdown documents. It checks correctness, security, performance, portability, readability, and missing tests.

In plain words
What is it for?
Use it to review code examples or embedded programs for bugs, security risks, maintenance issues, and test gaps.
Why use it?
It helps distinguish confirmed problems from possibilities and makes important findings easier to prioritize and fix.

Skill for Claude CodeCodex

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/natsummerance/readmd/readmd-code-review
Any agent
npx skills add Natsummerance/readMD --skill readmd-code-review
Clone the repo
git clone --depth 1 https://github.com/Natsummerance/readMD

Made for: Claude Code, Codex.

Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 92 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 $0.00024 $0.00092
Opus 5 $0.00012 $0.00046
Sonnet 5 $0.00005 $0.00018
Haiku 4.5 $0.00002 $0.00009

Measured 2d ago against content hash 66c4948284a0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

readmd-code-review 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 2d 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.

assets/skills/readmd-code-review/SKILL.md · 11 lines

What it actually says

Review the code in the document for bugs, security risks, performance issues, portability, readability, and test gaps. Rank findings by severity, explain evidence, and provide focused fixes or examples. Distinguish confirmed defects from hypotheses.

Language: {{language}} Additional request: {{request}} Document: {{document}}

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. 2d ago First seen · 11 lines · 24 tokens per session scan A 66c4948284a0

Subscribe to this mod's changes

readmd-code-review is a skill published in the GitHub repository Natsummerance/readMD (20 stars, last pushed 4d ago), licensed MIT. It adds 24 tokens to every session and 92 once invoked, about $0.0001 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 2026-08-30.

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