What is superdb-mcp CLAUDE.md?

A repository instruction file for Claude Code, covering how to build, test, and structure superdb-mcp, an MCP server that lets AI assistants run SuperSQL queries through the SuperDB command-line program. TDD means writing a failing test before the fix, then making it pass and cleaning up the code.

Installing dependencies, building or starting the server, running Vitest tests, and changing the code that launches SuperDB and routes its tools.

It gives the coding agent the project's commands, architecture, and required test-first workflow, including how tests behave when the SuperDB program is unavailable.

How chrismo/superdb-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to chrismo/superdb-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/chrismo/superdb-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/chrismo/superdb-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/chrismo/superdb-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/chrismo/superdb-mcp/claude-md)

Your own site

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

Per session 1,201 This file is loaded in full into every session.

When invoked 1,201 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	$0.01201	$0.01201
Opus 5.5	$0.00480	$0.00480
Sonnet 5.5	$0.00240	$0.00240
Haiku 4.5	$0.00120	$0.00120

Measured 5d ago against content hash fe8618c658d0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

superdb-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 5d 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 · 116 lines

How it starts

The opening of the file, as written. The whole thing — 116 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.

Build Commands

npm install          # Install dependencies
npm run build        # Compile TypeScript to dist/
npm run dev          # Watch mode for development
npm start            # Run the MCP server

Testing

Uses Vitest with globals enabled.

npm test             # Run tests once
npm run test:watch   # Watch mode

Tests live in src/__tests__/. Tests that require the super binary use it.skipIf() to skip gracefully when the binary is unavailable.

CI (.github/workflows/test.yml) runs the suite against the SuperDB release pinned in .superdb-version. Install that release locally with scripts/install-super.sh (defaults to ~/.local/bin). The database tool tests need SuperDB v0.4.0+ and skip on older binaries.

TDD is required. Write a failing test before implementing a fix or feature. The cycle is: red test, green implementation, then refactor if needed.

Architecture

This is an MCP (Model Context Protocol) server that wraps the SuperDB super binary, allowing AI assistants to execute SuperSQL queries without shell escaping issues.

Core Structure

src/index.ts - MCP server entry point. Registers all tools and resources, routes tool calls to implementations.
src/lib/super.ts - Core subprocess execution. runSuper() spawns the super binary and handles stdin/stdout. All tools use this.
src/lib/lsp-client.ts - LSP client for code intelligence features (completions, hover docs).
src/lib/version.ts - Parses SuperDB version strings from super --version output.

Tool Implementations

src/tools/query.ts - super_query, super_schema - file-based query operations
src/tools/db.ts - super_db_* tools for database tables (SuperDB v0.4.0+: super db -attach, load -use, SQL DDL via super db -c)
src/tools/info.ts - super_info, super_help, super_test_compat - version/docs/compatibility
src/tools/lsp.ts - super_complete, super_docs - LSP-powered code intelligence

Read the full file on GitHub · 116 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.

5d ago Changed · +2 lines · +93 tokens per session fe8618c658d0
2mo ago First seen · 114 lines · 1,108 tokens per session scan A 48b5893a7d6d

Subscribe to this mod's changes

superdb-mcp CLAUDE.md is an instructions file published in the GitHub repository chrismo/superdb-mcp (1 stars, last pushed 5d ago), licensed BSD-3-Clause. It adds 1,201 tokens to every session, about $0.0048 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 2026-08-31.

superdb-mcp CLAUDE.md next to 6 instructions from other repositories
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superdb-mcp: Instructions file for Claude Code