Two fixes from observing the first Gemma 2 batch run on Sirius:
1) Prune oversized feature counts. The upstream terrain pipeline emits
every distinct mountain cluster as a separate `mountain_range` and
every flowing path as a separate `river`. At the atlas generator's
512×256 grid this produced bodies with 40-80 named ranges and
10-15 rivers — noise, not information. A single planet with 48
ridges isn't richer, it's unparseable.
`tooling/planet-gen/prune_atlas_features.py` walks every
`markers.json` under `wiki/star-systems/`, ranks each feature type
by a size proxy, and keeps only the top N:
- mountain_ranges: sorted by `area_cells`, top 8 per body
- rivers: sorted by path length, top 6 per body
- oceans / cities / pois: untouched (already small, or
hand-authored by generate_atlas.py)
Sol (GJ-0) is hardcoded-excluded from pruning so the hand-authored
Earth / Mars / moon content stays untouched.
Each pruned body gets its atlas_* rows re-synced via
`sync_markers_to_db` so the DB mirror stays consistent. Bodies
whose wiki folder has no matching row in `bodies` (14 pre-existing
orphans like GJ1156h-1, GJ34Ah-2, …) are pruned in-file but skip
the DB sync to avoid FK violations on atlas_body_grids.
First run results:
bodies scanned: 2394
bodies pruned: 1513
mountain ranges dropped: 11640
rivers dropped: 1382
Safe to re-run — idempotent when a body is already within the caps.
2) Grounded cosmopolitan fallback palette. When Gemma's 3 retries
all fail (dedup, blocklist, stem-cap, placeholder), the code falls
to `_FALLBACK_STEMS[corridor]`. The old table had 10 stems per
corridor, all Latin-institutional (Meridian, Concord, Prefecture,
Cardinal, Lumen, Foro, Tabula, Vox, Axis, Senatus), which produced
the same-y `Axis Spine / Axis Ridge / Axis Heights / Axis Scarp`
clusters the user flagged on Sirius — exactly the old epic-Latin
register the few-shot pools were rewritten to avoid.
Fallbacks now draw from a 30-45 stem grounded cosmopolitan list
per corridor matching the few-shot pool intent:
- core: 45 stems (Ashfield, Bellview, Cedarbrook,
Fairmont, Ironwood, Kirkwood, Linden, Meridian,
Northfield, Riverside, Westbrook, …)
- north_reach: 40 stems (Ashford, Bellfield, Clifford, Drayton,
Elmhurst, Garner, Holmwood, Kelsworth, …)
- west_reach: 35 stems (Altdorf, Bergfjord, Eikhof, Hoogland,
Järvenpää, Kloosterdam, Nieuwpoort, Sørholm,
Svarteberg, Torsfell, Voorhout, Weserhof, Östby, …)
- east_reach: 35 stems (Aomori, Baektu, Chōshi, Fukagawa,
Hanyang, Izumi, Takamine, Yurigawa, …)
- south_reach: 36 stems (Alves, Brandão, Évora, Gomes, Ribeiro,
Serra, Várzea, Hlanganani, Kilimi, …)
- deep_frontier: 30 stems (Okafor, Stenner, Weller, Kellogg,
Stonebrook, Dustgate, Blackwater, …)
Per-feature suffix lists also expanded (e.g. river suffixes now
include Brook, Stream, Flow, Creek on top of the original Run /
Water / Beck / Rill / Course). Net effect: 300-450 unique fallback
combinations per (corridor, feature_type), up from 50, in the same
grounded register the few-shot pools teach.
Also preserves aliases `inner_corridor`, `inner_orbit`, and
`sol-gateway-axis` as legacy-compatible keys pointing at the
administrative-English palette.
Combined effect on the next run:
- ~45% fewer features to name (pruned 13k/52k)
- ~9× more fallback variety per corridor when fallback does trigger
- Same grounding overhaul from the previous commit, now reaching
into the safety-net path
jpmschweitzer
d811a4f792