Investigation of GroenLinks-PvdA merger dynamics in SVD space:
- Finding 1: GL-PvdA were 2.8-10.5% of avg inter-party distance apart pre-merger
- Finding 2: Merged party started most cohesive (#1 in 2023) but now 55% above avg spread
- Finding 3: Converged to 4.5% by Q3 2023, essentially indistinguishable
- Finding 4: GL/PvdA were most stable parties (10-25% drift) while VVD/D66 moved 70-177%
- Replace gtfs/bokeh deploy with motief/streamlit (port 8501)
- Update inventory to motief.sgeboers.nl
- Remove stale .drone.yml
- Add CI guard to forbid .env in repo
- Add env removal report and secrets rotation checklist
- Add 4 migration files: mp_votes, mp_metadata, svd_vectors, fused_embeddings
- Extend database.py with 5 new helper methods and table init
- Add pipeline/ package: extract_mp_votes, fetch_mp_metadata, text_pipeline,
svd_pipeline (with Procrustes alignment), fusion
- Add full test suite (17 tests) covering all pipeline modules and migrations
- Fix Procrustes alignment bug: scipy scale is a norm value, not a multiplier
- Fix DuckDB date type handling in test assertions (datetime.date vs string)
- Remove duckdb.py shim; tests now run against real duckdb + scipy via uv
Ref: thoughts/shared/plans/2026-03-21-parliamentary-embedding-pipeline-plan.md
Sven Geboers