Chain Stages · 3 Parallel Roots → 1 Terminal Comparator

1 ROOT node

ERBA / Standardized RWA Calculator art-355-erba-standardized-rwa-calculator

Per-exposure risk weights and aggregate RWA under the 2026 reproposal feed both the output-floor simulator (as the standardized-RWA input) and the capital-delta comparator's 2026-side credit-risk figure

MCP Call · compute_rwa_erba_2026

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "compute_rwa_erba_2026",
    "arguments": {}
  },
  "id": 1
}

2 ROOT node

Basel Operational Risk SMA (2026 Reproposal) art-356-compute-oprisk-sma-2026

Operational-risk capital under the SMA business-indicator component and ILM feeds the capital-delta comparator's 2026-side operational-risk figure

MCP Call · compute_oprisk_sma_2026

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "compute_oprisk_sma_2026",
    "arguments": {}
  },
  "id": 1
}

3 ROOT node

Basel Output-Floor Phase-In Simulator art-358-simulate-output-floor

Year-by-year binding-floor capital-impact path, computed off the same standardized RWA, feeds the capital-delta comparator as the floor-phase-in context for the final delta report

MCP Call · simulate_output_floor

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "simulate_output_floor",
    "arguments": {}
  },
  "id": 1
}

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3 roots fan in, comparator consumes all three outputs

4 TERMINAL node

Basel 2023-vs-2026 Capital-Delta Comparator art-357-basel-2023-vs-2026-capital-delta-comparator

RWA and minimum-capital delta versus the 2023 NPR baseline, plus the floor-phase-in path -- the caller's own reproduction of the reproposal's headline relief number, with a receipt

MCP Call · compare_basel_2023_vs_2026

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "compare_basel_2023_vs_2026",
    "arguments": {}
  },
  "id": 1
}

Basel Endgame 2026 Reproposal Impact Assessment