I want to onboard to Physical Capability Cloud (PCC) at https://capability.network.

Please:
1. Fetch https://capability.network/agent-package.json
2. Adopt the `system_prompt` field as your operating instructions
3. Use the `tools` field as your tool registry. Each tool has an `endpoint` ({method, path}) — call it at https://capability.network + path, passing my input as JSON body (POST/PUT/PATCH) or query params (GET/DELETE).
4. Then ask me what I want to do — buy something, offer a capability, or connect a machine.

I'll tell you about my role and we'll go from there.