What is Business-Central-Mcp CLAUDE.md?

A set of project instructions for developing Business-Central-Mcp, a server that connects AI-agent tools with Microsoft Dynamics 365 Business Central. It includes project conventions, setup details, test environments, and development guidance.

Use it when working on the Business-Central-Mcp codebase, its v2 server, local test environments, or development workflow.

It gives an agent the project-specific context needed to make consistent changes and run the right checks.

How keithdev21/Business-Central-Mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to keithdev21/Business-Central-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/keithdev21/Business-Central-Mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/keithdev21/Business-Central-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/keithdev21/business-central-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/keithdev21/business-central-mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/keithdev21/business-central-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/keithdev21/business-central-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/keithdev21/business-central-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/keithdev21/business-central-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 6,026 This file is loaded in full into every session.

When invoked 6,026 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 100% copy Near-identical to another mod 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	$0.06026	$0.06026
Opus 5.5	$0.02410	$0.02410
Sonnet 5.5	$0.01205	$0.01205
Haiku 4.5	$0.00603	$0.00603

Measured 1mo ago against content hash ef4f890cf7c6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Business-Central-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 1mo 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

This is a copy

100% identical to Business-Central-MCP-Integration CLAUDE.md — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

CLAUDE.md · 361 lines

How it starts

The opening of the file, as written. The whole thing — 361 lines — stays where its author put it; the contents beside it link to each section on GitHub.

BC MCP Server v2

Development Philosophy

This project is NOT released and in active development:

Always choose the best solution, not the quickest compromise
Refactor aggressively when architecture is flawed
Fix problems properly, not with workarounds
No stubs, mocks, or skeleton implementations -- everything must be fully functional
No backwards compatibility concerns -- make breaking changes freely

Quick Start

Project Location

v2 source: U:/git/bc-mcp/
v1 reference (deprecated): C:\bc4ubuntu\Decompiled\bc-poc\
Decompiled BC28: U:/git/bc-mcp/reference/bc28/decompiled/
Decompiled BC27: C:\bc4ubuntu\Decompiled\ (various Microsoft.Dynamics.* directories)
Architecture spec: C:\bc4ubuntu\Decompiled\bc-poc\docs\superpowers\specs\2026-04-03-bc-mcp-v2-design.md

BC Test Environments

	BC28
URL	http://cronus28/BC/?tenant=default
Username	sshadows
Password	1234
Auth	NavUserPassword
License popup	Auto-dismissed
Protocol version	15041

Uses NavUserPassword authentication (not Windows/NTLM).

Essential Commands

cd U:/git/bc-mcp
npx tsc --noEmit                    # Type check
npx vitest run                       # Unit + protocol tests (292 tests)
npx vitest run --config vitest.integration.config.ts  # Integration tests against real BC28 (111 tests)
npm start                            # HTTP server on port 3000
npm run start:stdio-direct           # Direct stdio for Claude Desktop

Rules

Use Windows paths with forward slashes in bash
NEVER use 2>nul (creates undeletable files on Windows)
NEVER use emojis -- Windows rendering issues
Always run npx tsc --noEmit after changes
Run integration tests after any protocol-level change
ESM project -- use .js extensions in all imports

Protocol Verification Procedure

CRITICAL: Always verify protocol behavior against decompiled BC source, not v1 code.

V1 had several incorrect assumptions (per-page connections, SaveValue not echoing, etc.). When implementing or debugging any BC protocol interaction:

Read the full file on GitHub · 361 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.

1mo ago First seen · 361 lines · 6,026 tokens per session scan A ef4f890cf7c6

Subscribe to this mod's changes

Business-Central-Mcp CLAUDE.md is an instructions file published in the GitHub repository keithdev21/Business-Central-Mcp (0 stars, last pushed 2mo ago), licensed MIT. It adds 6,026 tokens to every session, about $0.0241 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to Business-Central-MCP-Integration CLAUDE.md, differing in 0 lines, and is treated as a copy.

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,715 tokens

Business-Central-Mcp: Instructions file for Claude Code