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fix(central): v0.4 D.1 -- subject-domain category fallback (traffic 'work_zone.wzdx' was mapping to 'other')

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Surfaced during the Phase D rollout flipping all five remaining domains to
central. Central's traffic categories are NOT domain-prefixed -- the inner
Event.category for a work zone is "work_zone.wzdx", not "traffic.work_zone".
The prefix table in map_category therefore missed and returned "other", which
would break category-based routing/digest grouping for central-sourced traffic.

before: map_category("work_zone.wzdx") -> "other"
after:  when the category table misses, fall back to the stable subject domain
        token (central.<domain>.<...>): central.traffic.* -> traffic_congestion.
        Added category_from_subject() + a domain->category map (wx, fire, quake,
        hydro, space, disaster, traffic, traffic_flow, traffic_cameras). The
        well-prefixed domains (wx.alert, fire.incident, hydro., space.alert)
        still match the primary table; the fallback only fires on a miss, so a
        known domain never yields "other" again.

Test: tests/test_central_consumer.py gains test_subject_domain_fallback_for_unmapped_category
(category_from_subject + a 'work_zone.wzdx' message -> traffic_congestion).
Full suite: 277 passed.

Verified in prod (rebuilt, all 5 flipped to central): the per-domain
LAST_PER_SUBJECT normalize probe now shows traffic -> category=traffic_congestion
(was 'other'); the other four domains unchanged and clean.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
K7ZVX 2026-05-28 05:05:12 +00:00
commit ea0c68097a
2 changed files with 47 additions and 1 deletions
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19
tests/test_central_consumer.py
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@ -144,3 +144,22 @@ def test_consumer_config_uses_deliver_policy_new():
from meshai.central.consumer import consumer_config
from nats.js.api import DeliverPolicy
assert consumer_config().deliver_policy == DeliverPolicy.NEW
def test_subject_domain_fallback_for_unmapped_category():
"""D.1: an unmapped category (traffic 'work_zone.wzdx') falls back to the
subject domain instead of returning 'other'."""
import json
from meshai.central.consumer import CentralConsumer, category_from_subject
from meshai.config import EnvironmentalConfig
from meshai.notifications.pipeline.bus import EventBus
assert category_from_subject("central.traffic.work_zone.ok") == "traffic_congestion"
rec = []
bus = EventBus(); bus.subscribe(rec.append)
c = CentralConsumer(EnvironmentalConfig(), bus)
env = {"id": "wz1", "data": {"id": "wz1", "adapter": "wzdx",
"category": "work_zone.wzdx", "time": "2026-05-28T00:00:00Z", "severity": 1,
"geo": {"centroid": [-96.2, 36.15], "primary_region": "US-OK", "regions": ["US-OK"]},
"data": {"road": "I-44"}}}
ev = c._handle("central.traffic.work_zone.ok", json.dumps(env).encode())
assert ev is not None and ev.category == "traffic_congestion"