v3.1.0 — agent-readiness release
Four upgrades so an agent can answer "can I call this, what do I have left, what would more cost" from the schema instead of by probing (#63, #64):
- Plan-tier labels in every gated tool description — history → Developer $19+; futures/curve/marine/spreads → Professional $99+; storage/rigs/OPEC/inventories/forecasts → Reservoir Mastery; drilling → Scale; well permits → add-on/enterprise.
- New
opa_get_natural_gas_hubs— six US hubs as basis to Henry Hub (Waha, SoCal Citygate, Chicago Citygate, Algonquin Citygate, Eastern Gas South, Houston Ship Channel) with per-hub history depth. - New
opa_get_account_status— plan tier, usage, remaining quota, reset date. - New
opa_get_plans— live plan ladder from the API; works keyless. - New
opa_get_data_quality— per-series quality grades and dimension scores; catalogue summary on any key. - Gate errors (402/403/429) now point at
opa_get_plans/opa_get_account_status.
36 tools. 166 tests pass; live smoke and packaged smoke green.