# Polar House External Reference Status: verified against the cached Swiss `setest/t.exp` fixture in the project `.venv` Purpose ------- This page records the high-latitude external oracle slice for house validation. It complements the internal polar-house gauntlets. It does not replace them. What the oracle covers ---------------------- | Metric | Measured value | Notes | | --- | ---: | --- | | Supra-critical Swiss fixture cases | `936` | Filtered from the cached `t.exp` house fixture | | Latitude samples | `+89.9 deg`, `-89.9 deg` | Both polar extremes are present | | JD range | `2456334.5` to `2456335.4166666665` | 2013 polar slice in the fixture | | Supported systems represented | `13` | `O`, `R`, `C`, `E`, `V`, `W`, `X`, `H`, `T`, `B`, `M`, `U`, `Y` | | Failures above `0.001 deg` | `0` | Same threshold as the main Swiss house validation | System names represented ------------------------ - Porphyry - Regiomontanus - Campanus - Equal - Vehlow - Whole Sign - Meridian - Azimuthal - Topocentric - Alcabitius - Morinus - Krusinski-Pisa - APC What this proves ---------------- - Moira matches the cached Swiss external oracle for supported house systems even when the observer is deep inside the polar cap. - High-latitude support is not limited to one forgiving system; it spans 13 distinct system families in the current oracle slice. What this does not prove ------------------------ - It does not validate Placidus or Koch above the critical latitude as direct Swiss cusp outputs, because the relevant truth question in Moira is fallback doctrine, not unsupported cusp generation. - That fallback doctrine is covered separately by [tests/unit/test_polar_house_breadth_gauntlet.py](https://github.com/TheDaniel166/moira/blob/main/tests/unit/test_polar_house_breadth_gauntlet.py) and [tests/unit/test_polar_chart_public_gauntlet.py](https://github.com/TheDaniel166/moira/blob/main/tests/unit/test_polar_chart_public_gauntlet.py). Proof artifact -------------- - [tests/integration/test_houses_polar_external_reference.py](https://github.com/TheDaniel166/moira/blob/main/tests/integration/test_houses_polar_external_reference.py)