OpenChainGraph Suite · CONTRACT A3 · arch #5

Arc Fit Diagnostic

Note (dated 2026-08-04): a chain composes independent computations performed in an analytical order. No step's output is carried into the next step by the execution model; each step computes from its own declared inputs. This is true of every chain on this site, including chains whose per-step copy below reads as a data handoff.

D0 entry chain. 12-question diagnostic scoring CPN, StableFX, DvP, and agentic commerce fit for Circle Arc L1.

OpenChainGraph · 1 Step agent guardrail mandate Hash-Anchored §4 chain_depth:1 Client-Side · Zero PII
Chain Topology — Arc Fit Diagnostic
§4 Execution Hash · Chain Definition Anchor
execution_hash:computing…
Chain Stages · 1 Step
1 ROOT · TERMINAL · D0 node
Arc Fit Diagnostic art-42-arc-fit-diagnostic
arc_score, dimension scores, and cctp_routing_flag route to appropriate Arc chain
MCP Call · run_arc_fit_diagnostic
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "run_arc_fit_diagnostic",
    "arguments": {}
  },
  "id": 1
}
https://mcp.ainumbers.co/mcp
Export Artifacts
Download the §4 chain definition artifact (hash-anchored composite JSON) or the §13.11 W3C Verifiable Credentials view. Both derive from the chain definition — no new hash is minted. Available after hash computation.

Ask your agent

Copy this paragraph into Claude, OpenClaw, or any MCP-aware agent to run this whole workflow on the server and check one field that answers a real question.

Question: A payments team answered the twelve screening questions. Which Arc workflow should they adopt first, and how strong is the case?
Run the AINumbers MCP tool `run_chain` with {"chain":"arc-fit"} and read `art-42-arc-fit-diagnostic.primary_chain`.
Verify: call `verify_execution_hash` (https://mcp.ainumbers.co/mcp) with `claimed_hash` set to `composite_execution_hash` and the full `composite_artifact`.
Ledger, for a human re-check: https://ledger.ainumbers.co/
PII rule: send synthetic or anonymised inputs only. The MCP server runs these kernels and logs no payloads.
Chain page: https://ainumbers.co/chaingraph/chains/arc-fit.html