How to Use the Counterfactual-Variant Prover MCP in Windsurf

Force Windsurf to stop reciting memorized logic puzzle answers and actually calculate modified rules using Cascade.

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Connect Counterfactual-Variant Prover MCP to Windsurf

Create your Vinkius account to connect Counterfactual-Variant Prover to Windsurf and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Counterfactual-Variant Prover with Windsurf

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Decontaminate Cascade planning from classic solutions

The `validate_counterfactual` tool stops Cascade from blindly regurgitating memorized puzzle answers when your prompt introduces modified rules. It forces this MCP Server to isolate your custom input variables before planning any code execution. Once Cascade gets the verified variables, it builds its multi-step execution plan based on actual math instead of training data shortcuts. You don't get stuck with a copy-pasted classic riddle solution.

Automated rule discrepancy mapping in Windsurf

The `validate_counterfactual` tool runs rule-discrepancy mapping directly inside your Cascade workspace. Your agent automatically catches the difference between standard puzzle templates and your specific counterfactual inputs. Instead of manual prompting to fix lazy assumptions, Cascade runs this verification step autonomously before writing any test cases. This prevents broken logic from poisoning your generated code suites.

First-principles calculation for multi-step agents

The `validate_counterfactual` tool forces Cascade to calculate outcomes step-by-step using only your modified values. It rejects any logic contaminated by classic templates, throwing an error if the agent slips back into lazy recitation patterns. When Cascade encounters a rejection, it immediately rewrites its internal variables and recalculates. This loop guarantees that the final code output matches your specific edge-case rules perfectly.

Setup guide

Set up Counterfactual-Variant Prover MCP in Windsurf

Prerequisites

Windsurf IDE installed (macOS, Windows, or Linux)
Active Vinkius subscription with a valid endpoint token

1

Open MCP configuration

Click the Cascade assistant icon in the sidebar, then click the hammer icon (🔨) at the top of the panel. Select "Configure" to open ~/.codeium/windsurf/mcp_config.json.
2

Add the Counterfactual-Variant Prover MCP

Paste the JSON snippet shown on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Refresh MCPs

Go back to the hammer icon (🔨) in Cascade and click "Refresh". Windsurf will detect the new server. No full restart is needed — the connection is hot-reloaded.
4

Verify in Cascade

Start a new Cascade conversation and ask something like "Show my Counterfactual-Variant Prover payment history." If connected, Cascade will call the Counterfactual-Variant Prover tools directly. You will see a green dot next to the server name in the MCP panel.

mcp_config.json

{
  "mcpServers": {
    "counterfactual-variant-prover-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Counterfactual-Variant Prover. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Counterfactual-Variant Prover MCP in Windsurf

The tool intercepts logic requests and forces Cascade to run a strict step-by-step proof. This prevents Windsurf from outputting memorized answers to classic puzzles.

Yes, it maps the exact differences between your prompt and standard logic templates. Cascade then chains calculations using only those isolated variables.

Open your MCP config file or use the Windsurf settings UI. Add the server under your mcpServers block to let Cascade access the validation tool.

The validation tool throws an error indicating that template contamination occurred. Cascade then catches this error, resets its variables, and runs the calculation again.

No, all rule parsing and step-by-step logic checks run within our secure V8 sandbox. Your custom puzzle rules and prompt text never leak to third-party model providers.

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