ThumbGate
Use ThumbGate pre-action gates in MCP so agents cannot execute steps you already thumbs-downed or flagged as mistakes.
Overview
ThumbGate is a MCP server for the Build phase that uses pre-action gates to stop AI agents from repeating thumbs-downed or known mistakes.
What is this MCP server?
- Pre-action gates driven by thumb-up/down style agent feedback
- Blocks repeats of known mistakes before tools execute
- npm package thumbgate v1.23.2 with stdio MCP transport
- Public site thumbgate.ai for product context
- Same mistake-blocking positioning as MCP Memory Gateway with branded ThumbGate stack
- Version 1.23.2 on npm as thumbgate
- Repository: IgorGanapolsky/ThumbGate on GitHub
What problem does it solve?
Quick thumbs-down feedback in chat does not persist, so agents keep proposing the same bad edits and commands.
Who is it for?
Solo builders who already give fast thumbs feedback and want that signal enforced automatically during agent coding.
Skip if: Teams without MCP, or projects that do not persist any agent feedback signals.
What do I get? / Deliverables
Rejected patterns become gates that block matching actions before they run in your MCP-connected agent.
- Enforced blocks on previously rejected agent actions
- Persistent thumb feedback applied at tool invocation time
- Reduced repeat mistakes in long agent sessions
Recommended MCP Servers
Journey fit
ThumbGate enforces learned preferences during active agent-driven development, which is core Build-time agent tooling. It is an MCP guardrail product (thumbgate.ai) focused on gating tool actions, not shipping customer-facing app features.
How it compares
Thumb-branded pre-action MCP gate, not a standalone code review skill or CI security scanner.
Common Questions / FAQ
Who is ThumbGate for?
It is for MCP users who want thumb-style feedback on agent actions converted into automatic pre-action blocks.
When should I use ThumbGate?
Use it during Build when your agent keeps repeating fixes you rejected and you want gates at the tool layer.
How do I add ThumbGate to my agent?
Install thumbgate from npm, add a stdio MCP server entry in Claude Code or Cursor, and configure gates per thumbgate.ai and the GitHub repo.