What is feed-mcp CLAUDE.md?

Project instructions for feed-mcp, an MCP server that fetches RSS, Atom, and JSON feeds and makes their current content available to AI assistants. RSS and Atom are formats websites use to publish update lists.

Use them when building, testing, formatting, linting, or running the feed-mcp server and its feed integrations.

They give coding agents the repository's development commands, architecture notes, and testing requirements in one place.

How richardwooding/feed-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to richardwooding/feed-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/richardwooding/feed-mcp/main/CLAUDE.md

Clone the repo

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

Your own site

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

Per session 1,464 This file is loaded in full into every session.

When invoked 1,464 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	$0.01464	$0.01464
Opus 5.5	$0.00586	$0.00586
Sonnet 5.5	$0.00293	$0.00293
Haiku 4.5	$0.00146	$0.00146

Measured 2mo ago against content hash ee380ea2e812, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

feed-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 2mo 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 · 85 lines

How it starts

The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

Guidance for Claude Code (claude.ai/code) when working in this repository.

An MCP server that fetches RSS/Atom/JSON feeds and serves them to AI assistants. It bridges web feeds and AI tools, exposing real-time syndicated content over the MCP protocol.

Development Commands

This project uses a Makefile for all dev tasks — run make help for the full list.

make dev-setup     # Set up development environment
make dev           # Format, fix, and test (main dev loop)
make build         # Build all packages
make check         # Format, vet, lint, test
make test          # All tests (unit + BDD); also: test-race, test-coverage, test-coverage-html
make lint          # golangci-lint v2; also: lint-fix, fmt, vet, fix
make run            # Run with example tech feeds; also: run-security, run-reddit

Direct Go equivalents when needed:

go build ./...
go test ./...                                   # unit + BDD (model/features/*.feature via Godog)
go test -run TestName ./package                 # single test
go run main.go run https://techcrunch.com/feed/ # run the server locally

Docker images are built in CI via ko + goreleaser (no local Docker targets). Use ghcr.io/richardwooding/feed-mcp:latest.

Architecture

CLI (main.go, Kong) → store init → MCP server → transport (stdio or Streamable HTTP).

model/ — domain types (Feed, Item, Author), transport enums, FromGoFeed() adapter, URL validation (SanitizeFeedURLs).
store/ — Store manages concurrent feed fetching, caching (gocache + ristretto), per-host rate limiting, circuit breakers, retries, and connection pooling. Implements AllFeedsGetter and FeedAndItemsGetter.
mcpserver/ — MCP protocol server (official Go SDK); tools, resources, prompts; session management.
cmd/ — RunCmd implements the run command: transport selection, server init, graceful shutdown.

Patterns: factory constructors (NewStore, NewServer), small segregated interfaces, adapter (FromGoFeed), early-return error handling with custom error types (e.g. ErrInvalidTransport), errors as the last return value. See docs/ARCHITECTURE.md for the full breakdown.

Read the full file on GitHub · 85 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.

2mo ago First seen · 85 lines · 1,464 tokens per session scan A ee380ea2e812

Subscribe to this mod's changes

feed-mcp CLAUDE.md is an instructions file published in the GitHub repository richardwooding/feed-mcp (40 stars, last pushed 3d ago), licensed MIT. It adds 1,464 tokens to every session, about $0.0059 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 2026-08-30.

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feed-mcp: Instructions file for Claude Code