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 8,331 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: the file is CLAUDE.md. Also seen: reads .claude/ paths; mentions .claude-plugin; mentions CLAUDE.md.

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/github.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/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.

agentmods 80×15 button for openfec-mcp-server CLAUDE.md

Your own site · 80×15
<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="Reviewed on agentmods" width="80" height="20"></a>
Per session 8,331 This file is loaded in full into every session.
When invoked 8,331 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 $0.08331 $0.08331
Opus 5.5 $0.03332 $0.03332
Sonnet 5.5 $0.01666 $0.01666
Haiku 4.5 $0.00833 $0.00833

Measured 9d ago against content hash f0cbed31c937, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 9d 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 — 404 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 · 470 lines

How it starts

The opening of the file, as written. The whole thing — 470 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Protocol

Server: openfec-mcp-server Version: 0.10.0 Framework: @cyanheads/mcp-ts-core ^0.13.18 Engines: Bun ≥1.4.0, Node ≥24.0.0 MCP SDK: @modelcontextprotocol/server 2.4.0 Zod: 4.6.7

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 · 470 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. 9d ago Changed · +10 lines · +410 tokens per session f0cbed31c937
  2. 12d ago Changed · +1 lines · +11 tokens per session 8019a759c3bc
  3. 28d ago Changed · +4 lines · +487 tokens per session 6be50ecc12b6
  4. 1mo ago Changed 52018175f398
  5. 1mo ago Changed · +70 tokens per session 8c10c7eaad70
  6. 1mo ago Changed 5ae7e82bd0c7
  7. 1mo ago Changed · +49 lines · +1,827 tokens per session 458c108c07dd
  8. 2mo 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 10d ago), licensed Apache-2.0. It adds 8,331 tokens to every session, about $0.0333 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 77% identical to obsidian-mcp-server AGENTS.md, differing in 404 lines, and is treated as a copy.

Related

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