Initial import NDC_1C

docs/mvp_gate_3_hard_checks_2026-03-22.md

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+# MVP Gate: 3 Hard Checks (2026-03-22)
+
+## Context
+
+- Endpoint: `http://localhost/buh_test/odata/standard.odata/`
+- Generated artifact: `logs/deep_accounting_mvp_gate.json`
+- Script: `scripts/deep_probe_accounting_mvp_gate.py`
+
+## Results
+
+### 1) `document -> posting -> debit/credit account`
+
+- Status: `pass`
+- Evidence:
+  - joined rows found: `1193`
+  - line sets scanned with joins: `9`
+  - sample shows one document line linked to posting row with both `AccountDr_Key` and `AccountCr_Key`
+
+### 2) `posting -> subconto[1..3] -> counterparty / contract / item`
+
+- Status: `fail`
+- Evidence:
+  - dimensions found: `counterparty`, `contract`, `item`
+  - slots found: `1`, `2`
+  - required slots for hard check: `1`, `2`, `3`
+  - missing proof: stable slot `3` mapping in reproducible posting-linked evidence
+  - slot3 recon totals (`logs/slot3_recon_report.json`):
+    - `sets_with_slot3_fields`: `11`
+    - `sets_with_non_null_slot3`: `0`
+    - `rows_with_non_null_slot3_total`: `0`
+
+### 3) Explain one real saldo by movements
+
+- Status: `pass`
+- Evidence:
+  - account key: `cbfac538-cfb6-4fd4-8566-c20f34f9a3b0`
+  - movement count: `547`
+  - debit turnover: `156116250.22`
+  - credit turnover: `225610120.25`
+  - saldo: `-69493870.03`
+  - movement-level deltas are included in `logs/deep_accounting_mvp_gate.json`
+
+## Gate Verdict
+
+`Not yet sufficient for MVP accounting ontology; deeper access is justified for failed checks.`
+
+Reason: hard check #2 is not fully closed (slot `3` not reproducibly proven).