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Pre-v0.5.4 every Central subscription used a bare wildcard (central.wx.>,
central.fire.>, central.traffic.>, central.quake.>, central.hydro.>,
central.space.>), so a Magic Valley operator flipping nws -> central was
in fact subscribing to the all-US firehose and discarding 95% of events
locally. Central v0.9.20 (2026-05-28) added per-region subject suffixes
so the firehose can be filtered server-side. This wires meshai to use them.
Backend (meshai/central/consumer.py):
- New _subjects_for(adapter, region) replaces the static ADAPTER_SUBJECTS
dict. ADAPTER_SUBJECTS is retained as an alias to _SUBJECTS_BARE for any
legacy importers; the dispatcher path is unchanged.
- Per-adapter subject patterns (region='us.id' default):
nws -> central.wx.alert.us.id.> (region BEFORE wildcard)
usgs_quake -> central.quake.event.>.us.id (region AFTER wildcard)
firms -> central.fire.hotspot.>.us.id
fires -> central.fire.incident.id.> (state token at fixed depth)
central.fire.perimeter.id.>
traffic -> central.traffic.>.id (bare state, no us. prefix)
roads511 -> central.traffic.>.id (shared with traffic, sub-adapter routing)
usgs -> central.hydro.>.us.id
central.hydro.>.unknown (workaround until v0.9.20.1)
swpc -> central.space.> (planetary; region ignored)
- Empty/None region falls back to bare wildcards (pre-v0.9.20 behaviour).
- _subject_owned() pulls region from env.central.region and routes through
_subjects_for; v0.5.3 sub-adapter routing (owned-sources set) still
applies on shared subjects like central.traffic.>.id.
- start() logs the active region at connect-time for ops visibility.
Config (meshai/config.py):
- CentralConsumerConfig.region: str = "us.id". One region per consumer
applies to every central-flipped adapter; per-adapter overrides can
land in v0.6 when there is a real use case.
Frontend (dashboard-frontend/src/pages/Environment.tsx):
- Central Connection panel gets a Region text input next to URL/Durable.
- EnvConfig.central type extended with region: string.
- Static bundle rebuilt; index-DCFmSeOM.js -> index-B24tHcYj.js.
Tests:
- tests/test_central_region_routing.py (new, 9 cases): asserts the exact
v0.9.20 subject string for each adapter at region='us.id', the SWPC
global-stays-global rule, the USGS .unknown workaround, the empty-region
backward-compat fallback for all 8 adapters, and integration through
CentralConsumer._subject_owned() with the default region.
- tests/test_central_consumer.py + tests/test_central_sub_adapter_routing.py:
the two tests that asserted bare-wildcard subjects now set
env.central.region = "" explicitly to preserve their original concern
(no region semantics — backward-compat path only).
Why swpc stays global: space weather is planetary -- a CME is detected on
the sun, the geomagnetic response is hemispheric. There is no Idaho-only
solar event; subscribing per-region would only drop events we want.
Why hydro has the .unknown workaround: Central v0.9.20 leaves gauges
whose USGS state can't be inferred on central.hydro.>.unknown. Until
v0.9.20.1 backfills the state tag we subscribe to both filters to
avoid silently losing those rows. Idaho downstream-filtering on
data['_enriched']['usgs_site']['state'] is future v0.6 work.
Orthogonal to v0.5.2 dispatcher guards (staleness / cooldown / dedup)
and v0.5.3 sub-adapter routing: the region filter operates at the NATS
subscription layer (server-side), upstream of everything else.
Verified: pytest 327 passed (318 prior + 9 new region-routing tests);
py_compile clean; frontend build clean. Safe-mode preserved -- no toggle
enabled, no master enabled, no central enabled.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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