mcp-better — built for 7/28

NONE | GOOD | [BETTER] | BEST

(protocol 2026-07-28 — the modern MCP release)

the book is the app is the book

AAIF-verified modern MCP textbook that runs. Rust · rmcp 3.0 · Discover · stamped list cache.
Book: textbook/ — what · why · how · doctrine.
App: this binary + smokes. Lesson after lesson, version after version — knowledge compounds.

BEST (persistent AI project context) lives at faf.one/agents — one hop up from this textbook.

What is 7/28?

7/28 is a great name. 2026-07-28 is a date.
Humans say 7/28. Machines negotiate 2026-07-28.

Related MCP server: DuckDuckGo MCP Server

What to expect

1. Built for 7/28 — not bolted onto a legacy server (official rmcp 3.0).

2. Honest surface — transport and capabilities match docs and CI.

3. Roadmap expands the era — versions add road; they do not “become” 7/28 later.

What BETTER means

1. Protocol honesty — claim 7/28 / 2026-07-28 only for surfaces you implement and test.

2. Discover-compatible — clients should use ClientLifecycleMode::Discover (or Auto → 7/28), not only legacy initialize.

3. List cache stamps — tools/list returns positive ttlMs and cacheScope (static catalog → public). SDK defaults are unstamped.

4. Stable tool order — same process, same order across N list calls.

5. Transports — stdio (default) and Streamable HTTP (--http) in the same 7/28 era.

Quickstart (≤10 min)

# Requires Rust stable (1.85+)
git clone https://github.com/Wolfe-Jam/mcp-better.git
cd mcp-better
cargo build --bins
cargo test
cargo run --example stdio-client
# louder 0.3 smokes (build --bins first; or: bash scripts/ci.sh)
MCP_BETTER_BIN="$(pwd)/target/debug/mcp-better" cargo run --example order-restart-smoke
MCP_BETTER_BIN="$(pwd)/target/debug/mcp-better" \
  MCP_WORSE_BIN="$(pwd)/target/debug/mcp-worse" \
  cargo run --example contrast-smoke
MCP_BETTER_BIN="$(pwd)/target/debug/mcp-better" cargo run --example http-smoke

stdio (default — Cursor / Claude Desktop):

cargo run --release
# or from crates.io:
cargo install mcp-better --version 0.3.0
mcp-better --help
# optional lying companion (teaching only — not for hosts):
# cargo install mcp-better --version 0.3.0 --bin mcp-worse

First cargo install compiles the ecosystem once (not 100+ of our tools — just Rust deps). One-time wait; then you’re done.

Streamable HTTP (local demo only — see SECURITY.md):

cargo run --release -- --http
# http://127.0.0.1:8787/mcp
# MCP_BETTER_HTTP_ADDR=127.0.0.1:9000 mcp-better --http

Transport selection (CLI wins over env):

Tools

Protocol claims (v0.2 — same 7/28 era, more road)

Textbook

The book is the app is the book — textbook/ (Season 1 · doctrine).

Start: textbook/README.md → lab Ch 09.

Non-goals (GOOD-era habits we refuse)

• Shipping unstamped list results while claiming 7/28 modernity

• Requiring project.faf or any BEST tooling on this repo’s main branch

• Treating stdio as “not real 7/28” — stdio is a first-class 7/28 transport

• FAF install tax in the AAIF lede — this repo is protocol textbook, not a FAF product

Registry identity

• MCP Registry name: mcp-name: io.github.Wolfe-Jam/mcp-better

• registryType: cargo · identifier: mcp-better

• Package transport in server.json is stdio only — by design.
  cargo install mcp-better / Desktop / Cursor hosts spawn the binary on stdio.
  Streamable HTTP (--http) is an opt-in local demo in the same binary and the same 7/28 era; it is not a second Registry package. Discover it in this README and --help, not as a remote registry transport.

See server.json. Not one.faf/*.

Publish

Ship process: /pubbetter (skill) · short form docs/PUBBETTER.md · local ship bar:

export PATH="$HOME/.cargo/bin:$PATH"
bash scripts/ci.sh

BEST

For persistent, versionable AI project context beyond a protocol textbook:

https://faf.one/agents

Docs

• BETTER.md — ladder + claim surface

• docs/BETTER-BEST.md — BETTER vs BEST

• GETTING-STARTED.md

• docs/SDK-NOTES.md — serve vs Discover honesty

• SECURITY.md · CONTRIBUTING.md

License

MIT — see LICENSE.