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add native tropical western evidence engine

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2026-07-14 23:45:21 +08:00
parent 15f3404b97
commit 7df000b955
6 changed files with 395 additions and 7 deletions
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references/oracle/western_oracle_adapter_contract.md
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@@ -8,6 +8,22 @@ This contract defines how external Western astrology outputs enter the high-rigo
It is an evidence adapter, not a bundled Western astrology engine.
## Native Tropical Natal Layer
`scripts/western_chart_engine.py` uses the existing Swiss Ephemeris binding to
calculate a tropical natal chart from birth data. For `direct_chart` and
`rectification`, the unified workflow defaults to `western_mode: "auto"` when
no external payload is supplied. It records planetary longitude/speed,
Placidus houses, ASC/MC/DC/IC, major aspects with explicit orb limits,
element/mode distribution, and traditional house-ruler chains.
The native result is deliberately `partial`: it does **not** calculate
transits, secondary progressions, solar arcs, returns, synastry, or
interpretive signals. `prashna` does not receive a natal Western packet by
default. Set `western_mode` to `external_only` or `off` to suppress automatic
calculation. Explicit `western_evidence_packet` and `western_oracle_payload`
always take precedence.
## Accepted Input
```json
@@ -53,6 +69,7 @@ API and MCP callers may pass either field:
- `western_oracle_payload`: raw external Western astrology JSON export; the project normalizes it with `western_oracle_adapter`.
- `western_evidence_packet`: pre-normalized packet; the project carries it directly into `runtime_evidence_log`.
- `western_mode`: `auto` (default for non-Prashna birth-chart entries), `external_only`, or `off`.
When Jyotish evidence also carries matching `cross_system_signals`, `Cross-System Arbitration` can become `used`. If only Western evidence is present, arbitration stays `partial` or `blocked`.