agent-capability-purchase-preflight-mcp

# Agent Capability Purchase Preflight Receipt MCP A local evidence tool for comparing buyer-supplied AI capability offers before a human purchase decision. It blocks explicit policy conflicts, preserves incomplete feature fit for review and selects only a unique lowest-price eligible offer from the supplied manifests. ## What it creates - `result.json` - `capability-matrix.csv` - `issues.jsonl` - `CAPABILITY_PREFLIGHT.md` - `evidence-receipt.json` ## Requirements - Windows 11 - Python 3.11–3.14 - An MCP-compatible client - `MCP_LICENSE_KEY` from the MCP Marketplace purchase - Internet access for initial and periodic license verification License verification sends only the license key and public product slug. Buyer evidence paths, contents and generated reports remain local. ## Install from a purchased source checkout ```powershell python -m venv .venv .\.venv\Scripts\python.exe -m pip install . ``` ## MCP client configuration ```json { "mcpServers": { "agent-capability-preflight": { "command": "agent-capability-preflight-mcp", "env": {"MCP_LICENSE_KEY": "PASTE_THE_KEY_FROM_YOUR_PURCHASE"} } } } ``` Run the client from the folder containing buyer-authorized evidence. All supplied paths must be relative to that folder. ## Tool `build_capability_purchase_preflight` - `capabilities_path`: Capability-offer JSONL - `policy_path`: Owner policy JSON - `requirements_path`: Required-feature JSON - `output_directory`: new output directory The tool returns structured JSON. `ERROR` means the request could not be processed. ## CLI The diagnostic command is unlicensed: ```powershell agent-capability-preflight --json doctor ``` Protected commands verify the marketplace license before reading buyer files: ```powershell agent-capability-preflight --json analyze --capabilities examples/sample-input/capabilities.jsonl --policy examples/sample-input/policy.json --requirements examples/sample-input/requirements.json --out packet agent-capabili…