First Phase 2 deploy surfaced the wrong candidates on
shop.printableprompts.com: Students (53%), Resource (32%), Activities
(32%), Writing (31%), Practice (30%). These are shop vocabulary —
words that describe the whole shop, not categories within it. A stem
in 53% of products gives a shopper almost no information about which
subset a product belongs to.
- lib/tag_suggest.py: new max_share filter (default 0.4). Stems whose
product share exceeds this fraction auto-drop as shop vocabulary.
suggest_clusters now returns (clusters, filtered_count) so the UI
can show how many stems were filtered.
- top_n default 20 → 50 so the long tail of niche categories surfaces.
- views/shop.py: ?max_share=0.3 (stricter), ?max_share=1 (disable),
?top_n=200 URL knobs on the suggestions endpoint — power users tune
in the browser without redeploying. Floats over 1.0 are interpreted
as percentages (40 → 0.4) so the URL accepts either form.
- templates/shop_tags.j2: filtered-count hint with copy-paste tuning
knobs ("?max_share=0.3 stricter, ?max_share=1 to disable").
- scripts/backfill_tags.py: --max-share=0.4 CLI flag.
- Tests: test_suggest_clusters_filters_shop_vocabulary +
test_suggest_clusters_max_share_one_disables_filter. Existing pure-
function tests pass max_share=1.0 since their tiny fixtures would
otherwise be penalised for being small. 1067 total passing.
russell@unturf.com
546e85416e