openfec-mcp-server: Instructions file for Claude Code

CLAUDE.md

openfec-mcp-server CLAUDE.md is an instructions file for Claude Code from cyanheads/openfec-mcp-server. It costs 5,526 tokens per session, scanned A, a copy of obsidian-mcp-server AGENTS.md, Apache-2.0.

Project-specific instructions for building and maintaining an MCP server, a program that lets AI clients use tools and data. They cover the server's rules, protocol, API patterns, and suggested next tasks.

In plain words
What is it for?
Use them when adding tools, resources, prompts, services, or tests, or when deciding what work remains in the server.
Why use it?
They give the coding agent the project's conventions and current direction, reducing guesswork and inconsistent changes.

Instructions file for Claude Code

Written for Claude Code: Claude Code plugin machinery. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions Claude Code.

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

Reuse

Borrowing it

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

agentmods badge for openfec-mcp-server CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/cyanheads/openfec-mcp-server/claude-md.svg)](https://agentmods.dev/instructions/cyanheads/openfec-mcp-server/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/cyanheads/openfec-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/cyanheads/openfec-mcp-server/claude-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 5,526 This file is loaded in full into every session.
When invoked 5,526 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 77% 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.05526 $0.05526
Opus 5 $0.02763 $0.02763
Sonnet 5 $0.01105 $0.01105
Haiku 4.5 $0.00553 $0.00553

Measured 6d ago against content hash 4d455ebd6dfc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

openfec-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 6d 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

77% identical to obsidian-mcp-server AGENTS.md — 381 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 · 406 lines

How it starts

The opening of the file, as written. The whole thing — 406 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Protocol

Server: openfec-mcp-server Version: 0.8.0 Framework: @cyanheads/mcp-ts-core ^0.12.3 Engines: Bun ≥1.3.0, Node ≥24.0.0

Read the framework docs first: node_modules/@cyanheads/mcp-ts-core/CLAUDE.md contains the full API reference — builders, Context, error codes, exports, patterns. This file covers server-specific conventions only.


What's Next?

When the user asks what to do next, what's left, or needs direction, suggest relevant options based on the current project state:

  1. Re-run the setup skill — ensures CLAUDE.md, skills, structure, and metadata are populated and up to date with the current codebase
  2. Run the design-mcp-server skill — if the tool/resource surface hasn't been mapped yet, work through domain design
  3. Add tools/resources/prompts — scaffold new definitions using the add-tool, add-app-tool, add-resource, add-prompt skills
  4. Add services — scaffold domain service integrations using the add-service skill
  5. Add tests — scaffold tests for existing definitions using the add-test skill
  6. Field-test definitions — exercise tools/resources/prompts with real inputs using the field-test skill, get a report of issues and pain points
  7. Run devcheck — lint, format, typecheck, and security audit
  8. Run the security-pass skill — audit handlers for MCP-specific security gaps: output injection, scope blast radius, input sinks, tenant isolation
  9. Run the polish-docs-meta skill — finalize README, CHANGELOG, metadata, and agent protocol for shipping
  10. Run the maintenance skill — investigate changelogs, adopt upstream changes, and sync skills after bun update --latest

Tailor suggestions to what's actually missing or stale — don't recite the full list every time.


API Reference

The OpenFEC OpenAPI spec (Swagger 2.0) is at docs/openapi-spec.json — 100 paths, 203 definitions. Consult it directly for parameter names, enums, response shapes, and pagination models. Don't guess at API behavior.

Read the full file on GitHub · 406 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. 6d ago First seen · 406 lines · 5,526 tokens per session scan A 4d455ebd6dfc

Subscribe to this mod's changes

openfec-mcp-server CLAUDE.md is an instructions file published in the GitHub repository cyanheads/openfec-mcp-server (2 stars, last pushed 7d ago), licensed Apache-2.0. It adds 5,526 tokens to every session, about $0.0276 per session on Opus 5. A static security scan graded it A with 0 findings. It is 77% identical to obsidian-mcp-server AGENTS.md, differing in 381 lines, and is treated as a copy.

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