What is osdu-mcp-server CLAUDE.md?

Project guidance for developers and coding agents working on an OSDU MCP Server, which connects AI tools to the OSDU energy-data platform.

Following the architecture and testing workflow, running type checks, linting, formatting, and tests, and using the project’s Git conventions.

It explains the project’s development process and the checks needed before committing code, reducing guesswork and avoidable errors.

How danielscholl-osdu/osdu-mcp-server configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to danielscholl-osdu/osdu-mcp-server. 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/danielscholl-osdu/osdu-mcp-server/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/danielscholl-osdu/osdu-mcp-server

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/danielscholl-osdu/osdu-mcp-server/claude-md/github.svg)](https://agentmods.dev/instructions/danielscholl-osdu/osdu-mcp-server/claude-md)

Your own site

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

Per session 876 This file is loaded in full into every session.

When invoked 876 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	$0.00876	$0.00876
Opus 5	$0.00438	$0.00438
Sonnet 5	$0.00175	$0.00175
Haiku 4.5	$0.00088	$0.00088

Measured 10d ago against content hash 45be241373e5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

osdu-mcp-server 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.

CLAUDE.md · 90 lines

How it starts

The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file guides AI assistants working with the OSDU MCP Server codebase.

Project Context

OSDU MCP Server provides Model Context Protocol access to the OSDU platform. It adapts proven patterns from the OSDU CLI while being optimized for MCP's headless, long-running service model.

AI-Driven Development Workflow

This project follows an AI-agent driven workflow. See @CONTRIBUTING.md for the full process.

Key principles:

Architecture first: ADRs define decisions, specs define behavior
Test-driven: Minimum 80% coverage, behavior-focused tests (ADR-010)
Incremental: Build features phase by phase with validation

Essential Commands

# Quality checks (run before committing)
uv run mypy . && uv run flake8 src/ && uv run pytest

# Individual commands
uv run pytest                    # Run all tests
uv run pytest -xvs              # Run tests, stop on first failure
uv run mypy .                   # Type checking
uv run flake8 src/              # Linting
uv run black src/ tests/        # Format code

# Git workflow
git checkout -b agent/<issue-number>-<description>
git commit -m "feat: add new feature"  # Conventional commits
gh pr create                           # Create pull request

Key Architecture Patterns

Tool Implementation: See any file in src/osdu_mcp_server/tools/ for the pattern
Service Clients: Inherit from OsduClient, see shared/clients/
Error Handling: Use @handle_osdu_exceptions decorator
Write Protection: Check ADR-020 for dual permission model
Authentication: DefaultAzureCredential with configurable exclusions (ADR-002)
Prompt Maintenance: When adding services/tools, update AssetsGenerator._generate_tools_section() in shared/assets_generator.py

Core Documentation

@CONTRIBUTING.md - AI-driven development workflow
@docs/adr/README.md - Architectural decisions index
@docs/project-architect.md - System architecture
@CHANGELOG.md - Feature history with architectural context
@AI_EVOLUTION.md - Project evolution story for AI understanding

Read the full file on GitHub · 90 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.

10d ago First seen · 90 lines · 876 tokens per session scan A 45be241373e5

Subscribe to this mod's changes

osdu-mcp-server CLAUDE.md is an instructions file published in the GitHub repository danielscholl-osdu/osdu-mcp-server (6 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 876 tokens to every session, about $0.0044 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 2026-08-31.

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osdu-mcp-server: Instructions file for Claude Code