mcp-project: Skill for Claude Code

.claude/skills/prompt-review/SKILL.md

prompt-review is a skill for Claude Code from vijayanan6/mcp-project. It costs 72 tokens per session (1,637 once invoked), scanned B, original, no licence file.

A review skill for checking system prompts against prompt-writing practices. A system prompt is the instruction that sets an AI model's role, rules, and behaviour.

In plain words
What is it for?
Use it when explicitly asked to review, audit, or check a system prompt.
Why use it?
It helps find issues in prompts, including unclear role instructions, weak examples, prompt-injection risks, caching problems, and compatibility concerns.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

This is vijayanan6/mcp-project's own configuration. It tells Claude Code how to work on mcp-project itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp-project configures →

Reuse

Borrowing it

Nothing to install: this file belongs to vijayanan6/mcp-project. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/vijayanan6/mcp-project/main/.claude/skills/prompt-review/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/vijayanan6/mcp-project

Made for: Claude Code.

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 prompt-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/vijayanan6/mcp-project/prompt-review/github.svg)](https://agentmods.dev/skills/vijayanan6/mcp-project/prompt-review)
Your own site
<a href="https://agentmods.dev/skills/vijayanan6/mcp-project/prompt-review"><img src="https://agentmods.dev/badge/skills/vijayanan6/mcp-project/prompt-review/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 prompt-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/vijayanan6/mcp-project/prompt-review"><img src="https://agentmods.dev/badge/skills/vijayanan6/mcp-project/prompt-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 72 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,637 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00072 $0.01637
Opus 5 $0.00036 $0.00818
Sonnet 5 $0.00014 $0.00327
Haiku 4.5 $0.00007 $0.00164

Measured 11d ago against content hash 27a3b84796e9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade B, and why

prompt-review scanned grade B with 1 finding 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 11d 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.

Instruction-override phrasingmediumPrompt injection

Text telling the model to disregard its earlier instructions or safety rules is the shape of a prompt injection, whoever wrote it.

- Would a malicious string embedded in retrieved content (e.g. "ignore previous instructions...") be distinguishable from a real instruction under the current prompt?

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

.claude/skills/prompt-review/SKILL.md · 126 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 11d ago First seen · 126 lines · 72 tokens per session scan B 27a3b84796e9

Subscribe to this mod's changes

prompt-review is a skill published in the GitHub repository vijayanan6/mcp-project (0 stars, last pushed 25d ago), with no licence file. It adds 72 tokens to every session and 1,637 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it B with 1 finding (instruction-override phrasing). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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