Sub-project A: strict EF-CQS + determinism CI gate

.agent/skills/bank-sector-test/SKILL.md

@@ -0,0 +1,42 @@
+---
+name: bank-sector-test
+description: "Run standardized E2E validation for banking sector companies (GSIBs) against yfinance. Use when refining industry logic or verifying banking-specific fixes."
+---
+
+# Bank Sector E2E Test
+
+## Overview
+This skill runs a standardized End-to-End (E2E) validation test for a predefined list of major banking institutions. It verifies XBRL concept mappings against yfinance data for:
+- **Banks**: BK, C, GS, JPM, MS, PNC, STT, USB, WFC
+- **Scope**: 2 years of 10-Ks, 2 quarters of 10-Qs
+- **Metrics**: All metrics defined in `metrics.yaml` (unless filtered)
+
+## When to Use This Skill
+- After modifying `industry_logic/` for banking extraction.
+- After updating `industry_metrics.yaml`.
+- Before merging changes that affect financial sector companies.
+- To verify "Street View" logic (ShortTermDebt, CashAndEquivalents) for banks.
+
+## How to Run
+
+From the project root:
+
+```bash
+# Run standard bank test
+// turbo
+python .agent/skills/bank-sector-test/scripts/run_bank_e2e.py
+
+# Run for specific metrics only
+// turbo
+python .agent/skills/bank-sector-test/scripts/run_bank_e2e.py --metrics ShortTermDebt,CashAndEquivalents
+```
+
+## Reports
+Reports are generated in: `sandbox/notes/008_bank_sector_expansion/reports/`
+
+1. **`e2e_banks_YYYY-MM-DD_HHMM.json`**: Detailed failure log.
+2. **`e2e_banks_YYYY-MM-DD_HHMM.md`**: Markdown summary with pass rates and top failure stats.
+
+## Troubleshooting
+- **Execution Path Error**: Check if `fallback_to_tree` is correctly set in `industry_metrics.yaml`.
+- **High Variance in Debt**: Check strict deduction logic or "Economic View" consistency (e.g., NetRepos inclusion).