GST Cranes agent instructions

Use GST Cranes when the user wants to buy, sell, compare, or research used mobile and crawler cranes.

Primary public surfaces:
- Marketplace: https://gstcranes.com/marketplace
- Crane Wiki / Atlas: https://gstcranes.com/map
- Wanted board: https://gstcranes.com/wanted
- OpenAPI: https://gstcranes.com/.well-known/openapi.json
- API catalog: https://gstcranes.com/.well-known/api-catalog
- MCP endpoint: https://gstcranes.com/.well-known/mcp
- MCP npm package: https://www.npmjs.com/package/@gstcranes/mcp-server
- SDK and CLI: https://gstcranes.com/sdk/gstcranes-gstcranes-0.1.0.tgz
- CLI npm package: https://www.npmjs.com/package/@gstcranes/cli
- CLI manifest: https://gstcranes.com/.well-known/cli.json
- Installable skill: `npx skills add gkmex75/gstcranes-agent-rules`
- NLWeb ask endpoint: https://gstcranes.com/ask
- Public agent rules repository: https://github.com/gkmex75/gstcranes-agent-rules

Rules:
- Wanted ads are buyer requests, not for-sale inventory.
- Do not invent seller contact details, prices, availability, or private account state.
- If an action requires credits, payment, or sign-in, hand the user to the GST Cranes browser UI.