Every chain page carries an Ask your agent paragraph. This walkthrough follows the one on the AP2 payment-receipt chain from the copy button to a verified answer. The dashed lines show which machine does each part.
Show what happens, machine by machine, after you paste a chain page's Ask your agent prompt into an AI assistant, from the first tool call to a verified hash.
This is the paragraph on the chain page, generated from chaingraph/chain-prompts/agent-economy-payment-receipt.json. Paste it into Claude or any MCP-aware agent that has the AINumbers server connected.
steps[].inputs_source says where each step's inputs came from: fixture on the first run, caller for the step you changed.
parent_hashes threads each step's execution_hash into the next step, so the chain cannot be reordered or spliced.
composite_execution_hash covers every step that ran. verify_execution_hash recomputes it from the artifact, and identical inputs always give the identical hash.
The prompt text and the response field names are taken from the chain page and the MCP worker source. The chat replies are an illustrative transcript, the input values are fixture-style placeholders and the hashes are SHA-256 over demo strings computed in this page. In this door the kernels run on our Cloudflare Worker, which keeps no payloads. The other doors are on Three doors to the same workflows.