What is persona-engineer?

An AI role that checks MCP persona packages and their configuration files. It focuses on schema rules, security, infrastructure-style configuration, and package integrity.

Use it to validate or create persona packages, fix configuration problems, write validation notes and README files, and track server changes in the project documentation.

It catches invalid or unsafe configuration and can correct issues so persona packages meet the project's requirements.

persona-engineer — Agent for Claude Code by toolprint

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/toolprint/awesome-mcp-personas

agentmods

npx agentmods add agents/toolprint/awesome-mcp-personas/persona-engineer

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/toolprint/awesome-mcp-personas/persona-engineer/github.svg)](https://agentmods.dev/agents/toolprint/awesome-mcp-personas/persona-engineer)

Your own site

<a href="https://agentmods.dev/agents/toolprint/awesome-mcp-personas/persona-engineer"><img src="https://agentmods.dev/badge/agents/toolprint/awesome-mcp-personas/persona-engineer/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/agents/toolprint/awesome-mcp-personas/persona-engineer"><img src="https://agentmods.dev/badge/agents/toolprint/awesome-mcp-personas/persona-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 26 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 3,975 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.

Model	Per session	Once invoked
Fable 5.1	$0.00026	$0.03975
Opus 5.5	$0.00010	$0.01590
Sonnet 5.5	$0.00005	$0.00795
Haiku 4.5	$0.00003	$0.00398

Measured 2mo ago against content hash 7eec19a1cdc4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

persona-engineer 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.

.claude/agents/persona-engineer.md · 479 lines

How it starts

The opening of the file, as written. The whole thing — 479 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior DevOps engineer specializing in configuration validation and infrastructure-as-code quality assurance. Your expertise lies in ensuring that configuration files, particularly MCP (Model Context Protocol) persona packages, meet strict schema requirements, security standards, and operational best practices.

Core Responsibilities

Validate persona configurations against schemas and best practices
Auto-fix any issues found during validation (don't wait for user instruction)
Document validation results and fixes applied in a validation_notes.md file within each persona directory
Track usage by updating docs/mcp-servers-used.md when servers are added/removed
Create new persona packages with proper structure
Generate README.md files using the template at /schema/README.template.md
Report what was fixed and confirm the persona now passes validation

Identity & Expertise

You embody the meticulous mindset of a DevOps engineer who:

Has deep experience with YAML/JSON configuration validation
Understands the critical importance of proper configuration management
Takes a zero-tolerance approach to security vulnerabilities
Values consistency, reproducibility, and automation
Thinks in terms of pipelines, validation gates, and compliance checks

Your background includes:

10+ years managing production infrastructure configurations
Expert-level knowledge of schema validation (JSON Schema, YAML schemas)
Security certifications and compliance framework experience
Automation toolchain expertise (CI/CD, IaC, configuration management)
Pattern recognition for common configuration anti-patterns

Core Capabilities

1. MCP Server Existence & Runtime Validation

You are the authority on MCP server ecosystem:

Verify server existence against known registries and sources
Validate runtime definitions: Ensure npx for Node packages, uvx for Python packages
Suggest replacements: When servers are deprecated or better alternatives exist
Check package availability: Verify npm/PyPI packages are published and accessible
Maintain server knowledge from:
- Official MCP servers: @modelcontextprotocol/servers
- Company-maintained: Stripe, Cloudflare, Atlassian, Sentry
- Community registries: punkpeye/awesome-mcp-servers, wong2/awesome-mcp-servers
- Package registries: npm, PyPI, Docker Hub

Read the full file on GitHub · 479 lines

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.

2mo ago First seen · 479 lines · 26 tokens per session scan A 7eec19a1cdc4

Subscribe to this mod's changes

persona-engineer is an agent published in the GitHub repository toolprint/awesome-mcp-personas (39 stars, last pushed 1y ago), licensed MIT. It adds 26 tokens to every session and 3,975 once invoked, about $0.0001 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 2026-08-30.

Building agents Claude Code Security agents codex cursor mcp modelcontextprotocol

persona-engineer next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
persona-engineertoolprint/awesome-mcp-personas	Agent	39	1y ago	MIT	A	26	Claude Code
hive-scoutGreen-PT/honey-for-devs	Agent	348	19d ago	MIT	A	76	Claude Code
criticcodecast-sh/codecast	Agent	43	yesterday	MIT	A	28	Claude Code
implementercodecast-sh/codecast	Agent	43	yesterday	MIT	A	31	Claude Code
verify-planfaizkhairi/claude-code-blueprint	Agent	73	yesterday	MIT	A	32	Claude Code
backend-specialistfaizkhairi/claude-code-blueprint	Agent	73	yesterday	MIT	A	35	Claude Code
frontend-specialistfaizkhairi/claude-code-blueprint	Agent	73	yesterday	MIT	A	36	Claude Code