Skip to main content

PowerFill Phase 8 Workstream 1 — Superset Dashboards

Date: 2026-04-19 Agent: PSSaaS Systems Architect (Opus 4.7 High Thinking) Scope: Ship 8 PowerFill Superset dashboards + 25 charts deployed against PS_DemoData (bi.staging.powerseller.com). 1 hub (Run Overview) + 7 detail dashboards mirroring the 7 canonical Phase 7 reports. Architecturally novel patterns: Backlog re-read pass at planning time produced F-8-BR-1 (first empirical demonstration of the Phase 7 CR #1 candidate practice); F-8-BR-1 / A63 defensive query bypasses the encrypted PS_DemoData view; A64 explicit deferral of multi-tenant Superset registration to Phase 9+. Workstream 2 (React UI) deferred to a follow-up session per Reviewable Chunks.

Why​

Phase 8 is the PO milestone phase for "PowerFill reports with drill-down in Superset that I can review." The kickoff identified two distinct workstreams (Superset dashboards = directly satisfies the milestone; React UI = operator workflow on top). PO confirmed the W1/W2 split at planning checkpoint per Reviewable Chunks. W1 ships this session; W2 gets a fresh planning cycle informed by what Superset taught.

The Phase 7 read APIs ship the JSON contract; Phase 8 W1 dashboards consume the same pfill_* run-output tables directly via Superset (bypassing the API for performance + Superset-native filtering) and mirror the Phase 7 freshness/preservation semantics (latest-Complete-wins per ADR-025; A58 preservation; A54+A56+A62 carry-over rendering).

What Was Done​

Code (no SQL deploys to pfill_* tables; no backend changes beyond sentinel)​

  • infra/superset/queries/37_pfill_run_history_overview.sql (NEW; 67 lines) — Hub query: pfill_run_history with computed duration_seconds + is_latest flag.
  • infra/superset/queries/38_pfill_allocation_guide.sql (NEW; 97 lines) — Allocation + Kickouts UNION ALL with row_type discriminator.
  • infra/superset/queries/39_pfill_trade_recap.sql (NEW; 84 lines) — Per-trade fulfillment counters (35 columns).
  • infra/superset/queries/40_pfill_switching.sql (NEW; 53 lines) — Switching pairs from pfill_pool_guide filtered per BR-3.
  • infra/superset/queries/41_pfill_pool_candidates.sql (NEW; 59 lines) — All-options surface from pfill_loan2trade_candy_level_01.
  • infra/superset/queries/42_pfill_existing_disposition.sql (NEW; 171 lines) — Defensive query per F-8-BR-1 / A63 — bypasses the encrypted PS_DemoData view; mirrors 002_CreatePowerFillViews.sql CTEs minus note_rate.
  • infra/superset/queries/43_pfill_pooling_guide.sql (NEW; 49 lines) — Per-pool aggregation with all 8 BR-3 pool_action counts.
  • infra/superset/queries/44_pfill_cash_trade_slotting.sql (NEW; 57 lines) — F-7-8 canonical pattern; pfill_cash_market_map with NULL slot fields.
  • infra/superset/deploy-powerfill.py (NEW; 354 lines) — Idempotent Flask + SQLAlchemy deploy script; 8 dashboards × 25 charts; mirrors deploy-loan-pnl.py pattern.
  • src/backend/PowerSeller.SaaS.Modules.PowerFill/PowerFillModule.cs — sentinel bumped to phase-8-superset-ready (one-line change).

Documentation​

  • docs-site/docs/superset/powerfill-dashboards.md (NEW; ~250 lines) — Per-dashboard reference with A54/A56/A62 carry-over rendering vocabulary.
  • docs-site/docs/specs/powerfill-engine.md (amended) — Phased Implementation table marks Phase 8 W1 done with calendar-time observation + W2 deferral note.
  • docs-site/docs/specs/powerfill-assumptions-log.md (amended) — A63 (defensive Existing-Disposition query per F-8-BR-1) + A64 (single-DB-connection v1; multi-tenant Phase 9+).
  • docs-site/docs/handoffs/powerfill-phase-8-completion.md (NEW; ~300 lines) — completion report with PoC verification per dashboard + 4+1 Gate findings + 8 decisions table + Counterfactual Retro + recommended next steps.
  • docs-site/docs/agents/powerfill-phase-8-workstream-2-kickoff.md (NEW) — W2 (React UI) kickoff prompt for the next Architect session.
  • docs-site/docs/handoffs/pssaas-session-handoff.md (amended) — sentinel + backlog row #22.
  • This devlog entry.

PoC verification (DV Gate all 3 arms)​

  • Arm (a) sentinel: curl /api/powerfill/status → {"module":"PowerFill","status":"phase-8-superset-ready"} ✓
  • Arm (c) DB probe: 8/8 SQL queries execute clean against PS_DemoData via sqlcmd; row counts match expectations (5 / 0 / 0 / 0 / 0 / 0 / 0 / 688)
  • Arm (b) live deploy + render: 8 dashboards × 25 charts CREATED in PSX Superset (IDs 13-20); all 8 datasets verified end-to-end through Superset's own engine (same row counts; F-7-8 / 688-row Cash Trade Slotting pattern reproduced byte-for-byte from Phase 7's PoC)

Tests​

No new tests — Phase 8 W1 ships zero backend changes (one-line sentinel only). Existing 233 tests pass unchanged (32 BestEx + 200 PowerFill + 1 Api + 6 skipped).

Files Produced / Modified​

New (15):

  • infra/superset/queries/37_pfill_run_history_overview.sql
  • infra/superset/queries/38_pfill_allocation_guide.sql
  • infra/superset/queries/39_pfill_trade_recap.sql
  • infra/superset/queries/40_pfill_switching.sql
  • infra/superset/queries/41_pfill_pool_candidates.sql
  • infra/superset/queries/42_pfill_existing_disposition.sql
  • infra/superset/queries/43_pfill_pooling_guide.sql
  • infra/superset/queries/44_pfill_cash_trade_slotting.sql
  • infra/superset/deploy-powerfill.py
  • docs-site/docs/superset/powerfill-dashboards.md
  • docs-site/docs/handoffs/powerfill-phase-8-completion.md
  • docs-site/docs/devlog/2026-04-19e-powerfill-phase-8-superset.md (this file)
  • docs-site/docs/agents/powerfill-phase-8-workstream-2-kickoff.md

Modified (4):

  • src/backend/PowerSeller.SaaS.Modules.PowerFill/PowerFillModule.cs (sentinel bump)
  • docs-site/docs/specs/powerfill-engine.md (Phased Implementation table)
  • docs-site/docs/specs/powerfill-assumptions-log.md (A63 + A64)
  • docs-site/docs/handoffs/pssaas-session-handoff.md (sentinel + backlog #22)

Key Decisions​

#DecisionReference
D-8-1Single new deploy script deploy-powerfill.py (1-script-per-domain pattern)Plan §3 D-8-1
D-8-2Hybrid dashboard structure: 1 hub + 7 detail dashboardsPlan §3 D-8-2
D-8-3PS_DemoData-only single-DB v1; multi-tenant Phase 9+A64
D-8-5Existing Disposition query bypasses encrypted view (F-8-BR-1 / A63)A63
D-8-8Reviewable Chunks split at workstream boundary: ship W1, defer W2This devlog

Full decision details + rationale in the completion report §Decisions made.

What's Next​

Phase 8 Workstream 1 (Superset Dashboards) is COMPLETE. Sentinel phase-8-superset-ready. 8 dashboards × 25 charts surface the PowerFill run-output tables in PSX Superset; F-7-8 / 688-row Cash Trade Slotting pattern empirically validated through Superset's own engine.

The PO milestone "PowerFill reports with drill-down in Superset that I can review" is empirically achievable today. Suggested PO check: open https://bi.staging.powerseller.com/superset/dashboard/13/ (Hub), navigate to dashboard 20 (Cash Trade Slotting), confirm 688 rows render.

Workstream 2 (React UI) kickoff prompt drafted at docs-site/docs/agents/powerfill-phase-8-workstream-2-kickoff.md. Dispatch the next Architect session when ready.

Phase 9 (Parallel validation) can begin in parallel with W2. The A54 / A56 / A62 carry-overs are correctly rendered in the Phase 8 W1 dashboards (empty user-facing dashboards with the Hub + Cash Trade Slotting telling the full story).

Risks Captured​

  • A54 (legacy proc PK violation on PS_DemoData snapshot) — STILL DEFERRED Phase 9. Phase 8 W1 dashboards correctly render the A54-blocked state (6 user-facing dashboards empty; Hub explains why; Cash Trade Slotting renders real data via A58 preservation).
  • A56 (Step 5 fail-fast cascade) — STILL OBSERVATION, doubly-blocked with A54. Phase 8 W1's Hub + Cash Trade Slotting dashboards demonstrate the audit-trail + A58-preservation observability paths.
  • A62 (PS_DemoData view schema drift) — DEFERRED per Backlog #24; mitigated in Phase 8 W1 via A63 defensive query.
  • A64 (single-DB Superset connection) — DEFERRED per Phase 8 W1 plan §3 D-8-3; multi-tenant Superset registration is Phase 9+ work.
  • Workstream 2 (React UI) deferred — will be picked up in a follow-up Architect session via the W2 kickoff prompt. The PO milestone is achievable from W1 alone; W2 adds operator workflow on top but isn't strictly required.

Process Notes​

  • Sub-phase calendar time: ~1 Architect-session — consistent with 6a-6e + Phase 7 velocity. The 2-subagent-batch + Architect-authored-docs pattern compresses delivery.
  • Phase 7 CR #1 candidate practice "Backlog re-read pass at planning time" — first empirical demonstration. F-8-BR-1 (Backlog row #24 → defensive query for Existing Disposition) was caught at planning time, before any subagent dispatch, before any PoC. Phase 7 banked it as a candidate; Phase 8 demonstrates it. Banking for canonical-promotion review — the next process-discipline.md revision should add this as a sub-practice of the Three-layer Primary-Source Verification Gate's Implementation-vs-runtime layer with F-7-7 (caught at PoC; would-have-been-Backlog-discoverable) and F-8-BR-1 (caught at planning; was Backlog-discovered) as empirical evidence.
  • Andon-cord used twice: (a) F-8-3 outer ORDER BYs caught by Deploy Verification Gate arm c; removed in-place + each query's Notes section now documents the constraint; banked AGENTS.md citation discipline for future Superset-subagent prompts. (b) F-8-4 probe-wrapper bug for CTEs caught at re-probe; fixed in-place + banked CTE-detection branch logic for future probe scripts.
  • All 3 Deploy Verification Gate arms exercised: sentinel green; 8 dashboards × 25 charts CREATED in PSX Superset + verified end-to-end through Superset's own engine; 8/8 SQL queries probed clean against PS_DemoData via sqlcmd. F-7-8 / 688-row pattern is the canonical proof-of-life.
  • Required Delegation Categories — 8 SQL queries delegated (Subagent 1; clean first-attempt on column accuracy; one F-8-3 lint caught by gate); 25-chart deploy script delegated (Subagent 2; clean first-attempt); dashboard-design doc + spec amendment + 2 assumption-log entries + completion report + devlog + W2 kickoff self-implemented per Deliberate Non-Delegation. Mirrors 6e/7's split: greenfield + scaffolding delegable; UX-load-bearing docs self-implement.
  • Counterfactual Retro filled with 7 observations — most important: (1) the Backlog re-read pass IS the load-bearing planning gate input — F-8-BR-1 is its first empirical demonstration; banking for canonical-promotion review at next process-discipline revision; (2) Subagent prompts should cite known AGENTS.md lessons explicitly (F-8-3 ORDER BY would have been prevented); (3) the PO milestone IS achievable from W1 alone — empirically confirmed end-to-end through Superset's engine.