app/haunts.py merges two free, keyless, properly-licensed APIs rather than
scraping: Wikipedia geosearch+extracts (CC BY-SA) and OSM Overpass (ODbL).
Every haunt carries its source and a link back.
The Wikipedia-article requirement doubles as a notability gate: no article,
no pin. That keeps the map to documented history rather than rumour and
makes every entry independently checkable.
Deliberately excluded — recent crimes at residential addresses. People live
in those houses now and get harassed; the families are usually still alive.
So crime-framed entries must clear HISTORICAL_CUTOFF_YEAR, anything
residential is blurred to ~250m (street, never a door number), and an entry
that reads as a crime with no legible date is excluded rather than assumed
old. Battlefields, plague pits, gaols, executions and famous historical
cases are unaffected.
Privacy: the seeker's exact coordinate never leaves the process. Queries
snap to a ~1km grid before going upstream — far finer than the search
radius, coarse enough that Wikipedia and OSM never learn where anyone is,
and it makes the cache shared across a neighbourhood.
Two bugs found and fixed by testing against the live services rather than
assuming:
- Overpass answered 504. The naive query built 28 separate `around:`
searches (14 kinds x 2 element types); regrouping to one regex-alternated
clause per tag key with `nwr` cuts it to four.
- The flat keyword filter put "Fenchurch Street railway station" on the map
because its article mentions a fire. Hints are now split into strong
(qualify alone) and weak (need two), verified against live results.
Known limitation, honestly: all three public Overpass mirrors currently
time out or return empty from this host, so the map is Wikipedia-only in
practice right now. fetch_overpass already returns [] on any failure, so
this degrades quietly and self-heals if a mirror recovers.
Also adds the hunter-profiles contract spec.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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