Cursor + MCP QA Agent

A local Model Context Protocol server that gives Cursor Agent three focused QA tools, plus project rules and reusable workflows.

What the agent can do

Related MCP server: Lucius

Architecture

Cursor Agent
  ├─ .cursor/rules/qa-agent.mdc  → behavior and safety rules
  └─ .cursor/mcp.json            → local stdio connection
                ↓
       QA MCP server (TypeScript)
          ├─ analyze story
          ├─ create charter
          └─ draft bug report

Cursor provides the AI reasoning. The MCP server provides small, validated, deterministic tools.

Run and connect

npm install
npm run build
npm run smoke

Then open the repository in Cursor. The project-level .cursor/mcp.json registers the built server. Confirm portfolio-qa-toolkit is enabled in Cursor settings, open Agent, and paste the feature review prompt.

Why this is safe by default

• Tools do not access the filesystem, shell, network, or issue trackers.

• Zod validates every input before execution.

• Rules prohibit invented evidence and secrets.

• Bug severity remains a human decision.

• The MCP smoke test launches the server, discovers tools, and calls one through the real protocol.

Interview demo (3 minutes)

1. Show .cursor/mcp.json and the three tools in Cursor.

2. Paste the feature review prompt.

3. Let Agent call analyze_user_story, then create a charter.

4. Explain the boundary: Agent reasons; MCP supplies validated capabilities; a human approves conclusions.

Project structure

src/server.ts                 MCP server and schemas
src/qa-tools.ts               testable domain functions
.cursor/mcp.json              project MCP connection
.cursor/rules/qa-agent.mdc    persistent agent guidance
prompts/                      repeatable demo workflows
examples/                     sample feature description

License

MIT