io.github.lennney/mcp-slim-guard

76% fewer MCP tokens in our standard benchmark. Same upstream call. Exact recovery.

io.github.lennney/mcp-slim-guard · Repository · version 0.1.1-alpha.1 · 81 stars · listed from registry

Install

The sweep installs into a clean prefix, but this is the command a user would run:

npx mcp-slim-guard

Results by platform

Linux

MCP handshake failed2026-08-16 · probed over npm

1 recorded run, oldest first.

handshake failed: MCP error -32000: Connection closed
--- stderr (tail) ---
Usage: mcp-slim-guard [options] [command]

MCP context compression runtime — compress what agents see, preserve what tools
do

Options:
  -V, --version       output the version number
  -h, --help          display help for command

Commands:
  plan [options]      Generate a Host configuration plan without writing it
  install [options]   Apply one bounded Host configuration transaction with a
                      pre-write backup
  rollback [options]  Restore the recorded Host configuration if it has not
                      changed
  analyze             Inspect an MCP catalog without changing configuration or
                      invoking Tools
  profile [options]   Read bounded runtime delivery evidence without invoking
                      Tools
  init [options]      Auto-discover MCP config and generate mcp-slim-guard.yml
  start [options]     Start the guard proxy
  status              Show resolved configuration
  doctor              Diagnose upstream server connectivity and config validity
  validate            Dry-run: check which tools would be allowed/blocked by
                      current policies
  log [options]       View audit log
  uninit [options]    Remove mcp-slim-guard config and cleanup
  help [command]      display help for command

macOS

MCP handshake failed2026-08-16 · probed over npm

1 recorded run, oldest first.

handshake failed: MCP error -32000: Connection closed
--- stderr (tail) ---
Usage: mcp-slim-guard [options] [command]

MCP context compression runtime — compress what agents see, preserve what tools
do

Options:
  -V, --version       output the version number
  -h, --help          display help for command

Commands:
  plan [options]      Generate a Host configuration plan without writing it
  install [options]   Apply one bounded Host configuration transaction with a
                      pre-write backup
  rollback [options]  Restore the recorded Host configuration if it has not
                      changed
  analyze             Inspect an MCP catalog without changing configuration or
                      invoking Tools
  profile [options]   Read bounded runtime delivery evidence without invoking
                      Tools
  init [options]      Auto-discover MCP config and generate mcp-slim-guard.yml
  start [options]     Start the guard proxy
  status              Show resolved configuration
  doctor              Diagnose upstream server connectivity and config validity
  validate            Dry-run: check which tools would be allowed/blocked by
                      current policies
  log [options]       View audit log
  uninit [options]    Remove mcp-slim-guard config and cleanup
  help [command]      display help for command

Windows

MCP handshake failed2026-08-16 · probed over npm

1 recorded run, oldest first.

handshake failed: MCP error -32000: Connection closed
--- stderr (tail) ---
Usage: mcp-slim-guard [options] [command]

MCP context compression runtime — compress what agents see, preserve what tools
do

Options:
  -V, --version       output the version number
  -h, --help          display help for command

Commands:
  plan [options]      Generate a Host configuration plan without writing it
  install [options]   Apply one bounded Host configuration transaction with a
                      pre-write backup
  rollback [options]  Restore the recorded Host configuration if it has not
                      changed
  analyze             Inspect an MCP catalog without changing configuration or
                      invoking Tools
  profile [options]   Read bounded runtime delivery evidence without invoking
                      Tools
  init [options]      Auto-discover MCP config and generate mcp-slim-guard.yml
  start [options]     Start the guard proxy
  status              Show resolved configuration
  doctor              Diagnose upstream server connectivity and config validity
  validate            Dry-run: check which tools would be allowed/blocked by
                      current policies
  log [options]       View audit log
  uninit [options]    Remove mcp-slim-guard config and cleanup
  help [command]      display help for command

Badge

Paste this into the project README to show the current result:

[![does it install](https://img.shields.io/endpoint?url=https://doesitinstall.com/badge/io.github.lennney__mcp-slim-guard.json)](https://doesitinstall.com/s/io.github.lennney__mcp-slim-guard.html)