[MvikManners]

Description

Adds aw1-breaker to the curated list of community frameworks and server tools in ADDITIONAL.md.

• Repository: https://github.com/MvikManners/aw1-circuit-breaker
• Package: pip install aw1-breaker (v0.1.1)
• Summary: A deterministic, sub-millisecond (<0.5ms) out-of-band execution circuit breaker and strict AST schema guard for MCP tool servers.

Server Details

• Server / Middleware: aw1-breaker
• Changes to: ADDITIONAL.md (Curated list of community frameworks for servers)

Motivation and Context

MCP tool servers frequently execute high-leverage operations (such as code evaluation, shell execution, database transactions, and network egress) based on autonomous agent decisions. Standard in-band LLM safety prompts introduce high latency (>800ms) and can fail against polyglot or obfuscated prompt injections. aw1-breaker provides a lightweight, local Python circuit breaker (<0.02ms latency) that inspects Abstract Syntax Trees (AST) before tool invocation and issues cryptographic assurance tokens (AW1-EXEC-TOKEN-...) for audited execution paths.

How Has This Been Tested?

Tested across synthetic and adversarial vectors (BRK-101 through BRK-201) covering Base64 dynamic eval unpackers, polyglot payloads, socket egress interception, and burst call velocity tracking. Benchmarks verify 0.014ms containment latency with zero dependencies outside standard Python libraries.

Breaking Changes

None. This is an additive entry to ADDITIONAL.md.

Types of changes

• Documentation update

Checklist

• I have read the MCP Protocol Documentation
• My changes follow MCP security best practices
• My code follows the repository's style guidelines
• New and existing tests pass locally

[MvikManners]

Hi team, just checking in to see if any adjustments or additional information are needed for this addition to ADDITIONAL.md. The package (aw1-breaker) is live on PyPI with zero external dependencies and verified against the MCP specification. Happy to make any changes requested. Thank you!

[cliffhall]

Thank you for this pull request, and apologies for the long wait for a response. This repository does not accept new server implementations or server listings, and it now accepts issues, not pull requests, from anyone but its maintainers (CONTRIBUTING.md). To make your server discoverable, publish it to the MCP Server Registry by following its quickstart guide.

This is part of the backlog triage in #4875.