Document the outcome of the Option C spike (server-side DuckDB as a
Perspective virtual server) and the resulting architecture decision.
pf_perspective_options.md:
- Spike findings: latency is excellent (~12ms round trip, 5-29ms
aggregation, ~1.5-1.9s to materialize 534,902 rows) but Perspective's
GenericSQLVirtualServerModel ignores group_by_depth and has no
ViewConfig field for per-node expansion state, so interactive
drill-down is not achievable. This affects options B, C and D alike
since they share that SQL model.
- Decision: the real lever is grain, not transport. Pre-aggregating to
display grain collapses 534,902 -> 4,642 rows (~115x) on osm_stack
while keeping the native Perspective engine, so expand/collapse/
depth/sort/filter continue to work.
- Two candidate designs (Path A live virtual server vs Path B
pre-aggregated extract) with the deciding question: do real cuts ever
exceed the browser's leaf-row ceiling?
pf_spec.md:
- Concrete Path B design: pf.col_meta.in_grain, GET /api/versions/:id/agg,
synthetic pf_gkey index, and the append-deltas write/undo model that
mirrors the prior Excel pivot-cache workflow.
Drop pf_ux_mockup.md — an ASCII mockup of UI that is now built; the
views in ui/src/views are the current reference.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Document the @perspective-dev distribution (not FINOS @finos/perspective):
loader (npm /inline vs CDN), the version trilemma (inline needs 4.5.x,
viewer-d3fc caps at 4.4.1, charts need 4.4.1 — can't have all three),
Arrow vs JSON delivery constraints, deploy pattern, and an upgrade smoke
test. Correct CLAUDE.md's stale perspective.finos.org link to the actual
@perspective-dev repo.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
- units role is now optional; spec and CLAUDE.md reflect conditionality in SQL patterns
- pf.col_meta gains dim_group and dim_period_col fields (documented in both files)
- pf.dim_period calendar table added to schema docs
- pf.source default_layout column added to spec DDL
- Forecast table metadata columns corrected to pf_iter/pf_logid/pf_created_at throughout spec
- SQL patterns updated with correct CTE structure and RETURNING * to match generated code
- Project status updated to 2026-06-12; stale Arrow IPC open question removed
- todo.md deleted; open items retained in CLAUDE.md known issues
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Replace Bootstrap fill icons with Feather-style stroke SVGs (sun with
rays + crescent moon) in StatusBar toggle.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
