central/docs/PHASE-1A-5-VERIFICATION.md

Phase 1a-5 Verification Report

Gate 5: max_bytes Self-Loop Prevention

Objective: Verify that max_bytes updates to config.streams do NOT trigger a NOTIFY (preventing infinite supervisor recompute loops).

Test Procedure:

1. Started supervisor with stream retention enabled
2. Directly updated max_bytes via SQL:

   UPDATE config.streams SET max_bytes = 209715200 WHERE name = 'CENTRAL_META';
   

3. Monitored supervisor logs for any stream change handling

Result: PASS

No NOTIFY was triggered. The column-filtered trigger in 003_add_streams_table.sql correctly fires only on max_age_s changes:

ELSIF TG_OP = 'UPDATE' AND OLD.max_age_s IS DISTINCT FROM NEW.max_age_s THEN
    PERFORM pg_notify('config_changed', 'streams:' || NEW.name);

This prevents the supervisor's recompute_max_bytes() from creating a feedback loop.

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Gate 6: bbox Hot-Reload

Objective: Verify that changes to the NWS adapter's region bbox are picked up via hot-reload without supervisor restart.

Test Procedure:

1. Updated the NWS adapter's region via SQL:

   UPDATE config.adapters SET settings = jsonb_set(
       settings, '{region}',
       '{"north": 48.0, "south": 45.0, "east": -115.0, "west": -125.0}'::jsonb
   ) WHERE name = 'nws';
   

2. Observed supervisor logs for config reload

Result: PASS

Supervisor log showed immediate config application:

{"msg": "NWS config applied", "region": {"east": -115.0, "west": -125.0, "north": 48.0, "south": 45.0}}

The NOTIFY trigger on config.adapters fired and the supervisor's _handle_adapter_change() correctly invoked adapter.apply_config().

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Additional Verification

Polygon Intersection Filter

The _geometry_intersects_region() method was tested with:

• Shapely 2.1.2 installed via uv sync
• GeoJSON geometry parsing via shapely.geometry.shape()
• Region box creation via shapely.geometry.box()
• Intersection test via region_box.intersects(feature_shape)

Antimeridian Rejection

The RegionConfig validator was tested:

>>> RegionConfig(north=49.0, south=31.0, east=-170.0, west=170.0)
ValidationError: antimeridian-crossing bboxes not supported

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Verification Date

2026-05-16T19:06:00Z

Verified By

Claude Code (automated verification)