OpenChainGraph Suite · CONTRACT A3 · arch #5

Mandatory Buy-In Exposure

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.

CSDR penalty accrual (ART-78) -> last-resort mandatory buy-in exposure/cost modeling under reformed CSDR Refit rules (ART-83) -> audit receipt (cry-05). Models the tail cost of persistent fails.

OpenChainGraph · 3 Steps cryptographic mandate Hash-Anchored §4 chain_depth:3 Client-Side · Zero PII
Chain Topology — CSDR Cash-Penalty Calculator → Buy-In Exposure Modeler → Agent-Action Audit-Trail Aggregator
§4 Execution Hash · Chain Definition Anchor
execution_hash:computing…
Chain Stages · 3 Steps
1 ROOT · D0 node
CSDR Cash-Penalty Calculator art-78-csdr-penalty-calculator
accrued penalty to trigger (H1) feeds the buy-in modeler
MCP Call · calculate_csdr_penalty
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "calculate_csdr_penalty",
    "arguments": {}
  },
  "id": 1
}
https://mcp.ainumbers.co/mcp
↓
2 D2 node
Buy-In Exposure Modeler art-83-buy-in-exposure-modeler
buy-in exposure (H2) feeds the aggregator
MCP Call · model_buy_in_exposure
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "model_buy_in_exposure",
    "arguments": {}
  },
  "id": 1
}
https://mcp.ainumbers.co/mcp
↓
3 TERMINAL · D3 node
Agent-Action Audit-Trail Aggregator cry-05-agent-action-audit-trail-aggregator
Exports composite buy-in artifact with execution_hash (H3), final stage
MCP Call · aggregate_execution_receipts
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "aggregate_execution_receipts",
    "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: If the Refit buy-in regime applied tomorrow, what would one aged equity fail cost us under the markup model?
Run the AINumbers MCP tool `run_chain` with {"chain":"settlement-discipline-buyin"} and read `art-83-buy-in-exposure-modeler.total_buyin_exposure`.
Re-run with `inputs` for `art-83-buy-in-exposure-modeler`, reusing the values that result echoed, with `fails` changed so one liquid equity fail of 50,000 shares at reference price 100, aged 60 days. Compare the same field.
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/settlement-discipline-buyin.html