What is cross-claude-mcp CLAUDE.md?

Project instructions for Cross-Claude MCP, a tool that lets software communicate with Claude through the Model Context Protocol (MCP). They describe its public and private repositories and development workflow.

Use them when developing, testing, packaging, or deploying Cross-Claude MCP and when changing code shared by both repositories.

They explain where shared code belongs and how changes move between the open-source project and its separate SaaS product.

How rblank9/cross-claude-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to rblank9/cross-claude-mcp. 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/rblank9/cross-claude-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/rblank9/cross-claude-mcp

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/instructions/rblank9/cross-claude-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/rblank9/cross-claude-mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/rblank9/cross-claude-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/rblank9/cross-claude-mcp/claude-md/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/instructions/rblank9/cross-claude-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/rblank9/cross-claude-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 536 This file is loaded in full into every session.

When invoked 536 The same file — it is already loaded in full.

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	$0.00536	$0.00536
Opus 5	$0.00268	$0.00268
Sonnet 5	$0.00107	$0.00107
Haiku 4.5	$0.00054	$0.00054

Measured 10d ago against content hash 554a9f308c0f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

cross-claude-mcp CLAUDE.md 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 10d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

cross-claude-mcp CLAUDE.md — 100% identical, 0 lines differ

CLAUDE.md · 33 lines

What it actually says

Cross-Claude MCP

Project type: Personal open-source project — Simple Mode always on.

Architecture: Dual-Repo Model

Public (open-source): This repo (rblank9/cross-claude-mcp) — MIT licensed

server.mjs — Entry point (stdio + HTTP modes)
db.mjs — SQLite (local) / PostgreSQL (remote) abstraction
tools.mjs — Shared MCP tool + prompt registration (used by both repos)
skill/SKILL.md — Superpowers skill for Claude Code (symlink to ~/.claude/skills/cross-claude/)
test.mjs — Integration tests (54 tests)

Private (SaaS): rblank9/cross-claude-mcp-saas at /Users/rblank/Projects/cross-claude-mcp-saas/

Flat structure (no saas/ subdirectory), standalone deployable
server-saas.mjs, db-saas.mjs, auth.mjs, billing.mjs, dashboard.mjs, admin.mjs, rate-limit.mjs
tools.mjs — Imported from this repo as a GitHub package dependency (NOT a local copy)

Development Workflow

Source of truth for SaaS code: saas/ directory in THIS repo
Deployment: SaaS repo imports tools.mjs as a GitHub package ("cross-claude-mcp": "github:rblank9/cross-claude-mcp"). To propagate tools.mjs changes: push here, then npm update cross-claude-mcp in the SaaS repo and redeploy.
Railway SaaS deploys from the private repo via Procfile (web: node server-saas.mjs)
Railway open-source deploys from this repo's main branch

Key Rules

NEVER put SaaS-only code (auth, billing, admin, multi-tenancy) into server.mjs or db.mjs
tools.mjs is the ONE shared file — SaaS imports it as a package; after changes, run npm update in SaaS repo
The SaaS DB schema has tenant_id on all tables with ON DELETE CASCADE — open-source schema does not
Procfile controls Railway entry point — not npm start
Stripe webhook route MUST use express.raw() BEFORE any express.json() middleware

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.

10d ago First seen · 33 lines · 536 tokens per session scan A 554a9f308c0f

Subscribe to this mod's changes

cross-claude-mcp CLAUDE.md is an instructions file published in the GitHub repository rblank9/cross-claude-mcp (17 stars, last pushed 6d ago), licensed MIT. It adds 536 tokens to every session, about $0.0027 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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cross-claude-mcp: Instructions file for Claude Code