mcp-server-delphi: Instructions file for Claude Code

CLAUDE.md

mcp-server-delphi CLAUDE.md is an instructions file for Claude Code from danieleteti/mcp-server-delphi. It costs 1,686 tokens per session, scanned A, original, Apache-2.0.

A Delphi library and server that lets DMVCFramework applications expose tools, data resources, and prompts through MCP, a standard protocol for connecting assistants to software. It provides an MCP endpoint and uses JSON-RPC to handle requests.

In plain words
What is it for?
Use it when adding MCP endpoints to Delphi applications, exposing application functions, compiling the sample server, or building the test server.
Why use it?
It gives Delphi applications a defined way to communicate with MCP-compatible clients. The guide also records the compiler requirements and commands for building the examples and tests.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is danieleteti/mcp-server-delphi's own configuration. It tells Claude Code how to work on mcp-server-delphi 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-server-delphi configures →

Reuse

Borrowing it

Nothing to install: this file belongs to danieleteti/mcp-server-delphi. 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/danieleteti/mcp-server-delphi/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/danieleteti/mcp-server-delphi

Made for: Claude Code.

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Per session 1,686 This file is loaded in full into every session.
When invoked 1,686 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01686 $0.01686
Opus 5 $0.00843 $0.00843
Sonnet 5 $0.00337 $0.00337
Haiku 4.5 $0.00169 $0.00169

Measured 8d ago against content hash 01399ae9955e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

mcp-server-delphi 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 8d 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.md · 98 lines

How it starts

The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

MCP (Model Context Protocol) Server for DMVCFramework, using the idiomatic PublishObject JSON-RPC pattern. Allows DMVCFramework applications to expose MCP tools, resources, and prompts via the /mcp endpoint.

  • Language: Object Pascal (Delphi 11+)
  • Protocol: MCP version 2025-03-26
  • License: Apache 2.0

Build

# Compile the sample application (requires Delphi compiler)
dcc32.exe sample/MCPServerSample.dpr -Esample/bin

# Compile the test server
dcc32.exe tests/testproject/MCPServerUnitTest.dpr -Etests/testproject/bin

The project files can also be opened and built directly in the Delphi IDE.

Architecture

Core Library (Sources/)

The library follows an attribute-driven, RTTI-based discovery pattern with DMVCFramework's PublishObject for JSON-RPC dispatch:

  • MVCFramework.MCP.Server.pas — Contains TMCPServer (shared registry, created once at startup, scans providers via RTTI) and TMCPEndpoint (published object, created per request via PublishObject factory). MCP method names with / are stripped in OnBeforeRoutingHook (e.g. tools/listToolsList).
  • MVCFramework.MCP.Attributes.pas — Custom attributes: MCPToolAttribute and MCPParamAttribute (placed on parameters) for tools, MCPResourceAttribute, MCPPromptAttribute, MCPPromptArgAttribute. Parameter presence is expressed via TMCPParamPresence = (Required, Optional) (scoped enum, {$SCOPEDENUMS ON}) — the second argument of [MCPParam] and [MCPPromptArg], defaulting to Required and Optional respectively.
  • MVCFramework.MCP.Session.pas — Thread-safe in-memory session manager with 30-minute timeout using TCriticalSection.
  • MVCFramework.MCP.ToolProvider.pas / MVCFramework.MCP.ResourceProvider.pas / MVCFramework.MCP.PromptProvider.pas — Base classes and result record types. Result types use factory methods (TMCPToolResult.Text(), .Error(), .JSON(), .Image()).
  • MVCFramework.MCP.Types.pas — Protocol constants and capability records.

Read the full file on GitHub · 98 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.

  1. 8d ago First seen · 98 lines · 1,686 tokens per session scan A 01399ae9955e

Subscribe to this mod's changes

mcp-server-delphi CLAUDE.md is an instructions file published in the GitHub repository danieleteti/mcp-server-delphi (27 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 1,686 tokens to every session, about $0.0084 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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