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.
npx skills add perniemann/pnCore --skill pn-create-mcp-architecturegit clone --depth 1 https://github.com/perniemann/pnCoreWrote 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/perniemann/pncore/pn-create-mcp-architecture)<a href="https://agentmods.dev/skills/perniemann/pncore/pn-create-mcp-architecture"><img src="https://agentmods.dev/badge/skills/perniemann/pncore/pn-create-mcp-architecture/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/perniemann/pncore/pn-create-mcp-architecture"><img src="https://agentmods.dev/badge/skills/perniemann/pncore/pn-create-mcp-architecture.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 | $0.00034 | $0.00506 |
| Opus 5 | $0.00017 | $0.00253 |
| Sonnet 5 | $0.00007 | $0.00101 |
| Haiku 4.5 | $0.00003 | $0.00051 |
Grade A, and why
pn-create-mcp-architecture 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 7d 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.
What it actually says
Create MCP Architecture Document
Purpose
Create docs/MCP.md that documents which MCP servers the project uses, their purpose, and how they integrate. Enables onboarding and tooling maintenance.
When to use
- During project kickoff when discovery or workspace indicates multiple MCPs in use
- When project relies on MCPs (e.g. pn-core, Octocode, Stripe, n8n, shadcn) for development
- When adding or documenting MCP setup for a project
Input
- Discovery spec (stack, integrations mentioned)
- Workspace
.cursor/mcp.jsonor equivalent if inspectable - Known MCPs: pn-core, Octocode, Stripe, n8n, shadcn, Playwright, etc.
Instructions
-
Identify MCPs in use: From discovery (payments → Stripe MCP; workflows → n8n MCP; UI → shadcn MCP; code research → Octocode), workspace config if available, or user confirmation.
-
Apply template:
# [Project] MCP Architecture
## Overview
Which MCPs this project uses and why.
## MCP Servers
| MCP | Purpose | Integration |
|-----|---------|-------------|
| pn-core | Skills, agents, workflows, orchestration | Primary orchestration |
| [name] | [purpose] | [how it's used] |
| ... | ... | ... |
## Agent → MCP → Tool
Example flows: e.g. Frontend work → pn-core → pn-frontend-developer; Code trace → Octocode → lspGotoDefinition.
## Configuration
- Config path: `.cursor/mcp.json` (or equivalent)
- Env vars or secrets required (do not include values)
-
Load pn-documentation: Apply format conventions.
-
Save to:
docs/MCP.md. Createdocs/if missing.
Output
- MCP doc at
docs/MCP.md - Gate: "MCP architecture doc complete. Proceed?" when in workflow.
Integration
- pn-new (Involved mode): Optional step when MCPs in use; runs before refs index.
- pn-tooling-mcp-maintenance: For config review and version compatibility; this skill produces the doc.
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.
- 7d ago First seen · 65 lines · 34 tokens per session scan A 19fcd35f81f6
pn-create-mcp-architecture is a skill published in the GitHub repository perniemann/pnCore (0 stars, last pushed 4d ago), licensed MIT. It adds 34 tokens to every session and 506 once invoked, about $0.0002 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 2026-09-03.
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