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PowerFill Phase 8 Workstream 2 — Completion Report (React UI)

Author: PSSaaS Systems Architect Date: 2026-04-19 Status: Code complete; sentinel phase-8-superset-react-ready-a54-fixed ✓; greenfield React UI scaffolded under src/frontend/ (~50 source files); npm run build clean (270KB gzipped JS / 17KB gzipped CSS); npm run lint clean (0 errors / 0 warnings); npm run typecheck clean; new frontend Deployment + Service in pssaas-staging K8s manifest; ingress path /app added; new GHA workflow path-filter + build job + idempotent rollout step; ADR-026 documents framework + build-pipeline choice; A67 documents the F-W2-CONTRACT-1 ReportContracts.cs XML doc Truth Rot finding (3rd corroborating instance of the Backlog re-read pass). Pending Collaborator review and PO push. Sentinel: phase-8-superset-react-ready-a54-fixed ✓ (suffix-style preserves the A54-fix sub-suffix per the canonical post-A54-fix pattern from cf8ef8b) Companion docs:

TL;DR​

Phase 8 Workstream 2 (React UI) ships the operator workflow surface on top of the Phase 7 + 6e + 8-W1 contracts:

  • src/frontend/ scaffolded greenfield: Vite 8 + React 19 + TypeScript 6 + Tailwind v4 + React Router 7 + Prettier (~50 source files; 0 dependencies on the existing platform code beyond the API wire shapes).
  • 4 main pages: Home (entry + Superset Hub deep-link) / Submit (run options form) / RunsList (cursor-paginated history) / RunStatus (polling status + cancel).
  • 8 Phase 7 report pages with shared <ReportPageShell> + freshness banner: Allocation Guide / Trade Recap / Pool Switching / Pool Candidates / Existing Disposition / Pooling Guide / Cash Trade Slotting / Kickouts.
  • 4-verdict freshness banner (per A60 + A66): Current → no banner; Stale → red + view-latest link; TerminalEmpty Failed/Cancelled → yellow; TerminalEmpty Complete + syn-trade-empty → blue/info (load-bearing 2-source A66 distinction); RunNotFound → friendly 404.
  • "View in Superset" deep-links to dashboard IDs 13-20 on every run-status page + every per-report page.
  • Production build pipeline: src/frontend/Dockerfile.prod (multi-stage node:22-alpine build → nginx:alpine serve at /app/); GHCR image ghcr.io/kevinsawyer/powerseller-saas/frontend; new K8s frontend Deployment + ClusterIP Service in pssaas-staging; ingress path /app added; GHA deploy-staging.yaml extended with path-filter (src/frontend/**), reusable build job, and idempotent rollout (mirrors docs + api pattern; first-deploy guard via kubectl get deployment/frontend).
  • ADR-026 documents framework + build-pipeline choice (Vite + React + TS chosen over Next.js / CRA per Alternatives-First Gate).
  • Sentinel bumped from phase-8-superset-ready-a54-fixed → phase-8-superset-react-ready-a54-fixed (suffix-style preserves the A54-fix sub-suffix; mirrors the canonical post-A54-fix bump pattern).
  • A67 documents the F-W2-CONTRACT-1 ReportContracts.cs XML doc-comment Truth Rot finding (3rd corroborating instance of the Backlog re-read pass at planning time).
  • Spec amendment marks Phase 8 fully done.

The architectural centerpiece is the 2-source TerminalEmpty distinction in the freshness banner: per kickoff §"Inherited context" A66 row, post-A54-fix Complete runs on syn-trade-empty datasets like PS_DemoData render the user-facing reports as empty with a BLUE info banner explaining UE's clear-and-rebuild-empty semantics — visually distinct from the YELLOW banner on Failed/Cancelled runs (BR-9 cleared the tables). The A66 nuance is the load-bearing UX signal for the Greg-demo narrative (the "Bug as Feature" story doesn't require operators to interpret an empty allocation table as a fix bug).

Sub-phase calendar time: ~1 Architect-session — consistent with 6a-6e + Phase 7 + Phase 8 W1 velocity. Banking the pattern: greenfield React surface (50 files / 270KB build) is a 1-session unit at this scale when (a) the API wire shapes are stable, (b) the Architect self-implements the architecturally load-bearing primitives (freshness banner + tenant context + fetch helper), and (c) templated work (8 report pages) shares a single shell.

What was produced​

New frontend tree (51 files)​

DirectoryFilesPurpose
src/frontend/package.json, package-lock.json, index.html, vite.config.ts, tsconfig.json, tsconfig.app.json, tsconfig.node.json, eslint.config.js, .prettierrc.json, .prettierignore, .gitignore, README.md, Dockerfile.prodVite scaffold + Tailwind + Prettier + production Dockerfile
src/frontend/src/main.tsx, App.tsx, index.cssApp entry + router shell + Tailwind import
src/frontend/src/api/types.ts (~270 LOC), client.ts (~250 LOC), freshness.ts (~95 LOC)TypeScript wire types, fetch helpers for 12 endpoints, freshness verdict resolver
src/frontend/src/components/FreshnessBanner.tsx (~110 LOC)4-verdict banner + RunNotFoundPage
src/frontend/src/config/supersetDashboards.ts (~50 LOC)Hardcoded W1 dashboard ID map (IDs 13-20) for "View in Superset" deep-links
src/frontend/src/hooks/useApi.ts (~140 LOC), useReportFetch.ts (~65 LOC)Generic + report-specific async hooks with AbortController cleanup (AGENTS.md async-leak countermeasure)
src/frontend/src/state/TenantContext.tsx, tenantContextObject.ts, useTenant.ts, tenantConstants.tsTenant-picker context (split into 4 files to satisfy react-refresh/only-export-components)
src/frontend/src/pages/Home.tsx, Submit.tsx, RunsList.tsx, RunStatus.tsx (4 files; ~750 LOC total)Main operator workflow pages
src/frontend/src/pages/reports/ReportRouter.tsx, reportShell.tsx, 8 × *ReportPage.tsx (10 files; ~600 LOC total)Phase 7 report pages

New infra files / amendments​

  • src/frontend/Dockerfile.prod (NEW; ~50 LOC) — multi-stage node:22-alpine build + nginx:alpine serve at /app/; mirrors docs-site/Dockerfile.prod 1:1.
  • infra/azure/k8s/pssaas-staging/services.yaml (amended) — added frontend Deployment + frontend ClusterIP Service (between api and redis blocks; matches the docs Deployment shape).
  • infra/azure/k8s/ingress/pssaas-ingress.yaml (amended) — added path: /app Prefix rule routing to frontend:3000.
  • .github/workflows/deploy-staging.yaml (amended) — added frontend path-filter (src/frontend/**), build-frontend job calling reusable _build-image.yaml, frontend rollout step (with first-deploy kubectl get deployment/frontend guard for the bootstrap case).
  • src/backend/PowerSeller.SaaS.Modules.PowerFill/PowerFillModule.cs — sentinel bumped from phase-8-superset-ready-a54-fixed to phase-8-superset-react-ready-a54-fixed (one-line change at line 138 MapGet("/status", ...)).

New documentation​

  • docs-site/docs/adr/adr-026-frontend-framework-and-build.md — the framework + build-pipeline ADR.
  • docs-site/docs/handoffs/powerfill-phase-8-w2-completion.md — this completion report.
  • docs-site/docs/devlog/2026-04-19f-powerfill-phase-8-w2.md — devlog entry.
  • docs-site/docs/arc42/09-architecture-decisions.md — ADR-026 row added.
  • docs-site/docs/specs/powerfill-engine.md — Phased Implementation row #8 marks Phase 8 fully done.
  • docs-site/docs/specs/powerfill-assumptions-log.md — A67 added (F-W2-CONTRACT-1 / ReportContracts.cs XML doc-comment Truth Rot).
  • docs-site/docs/handoffs/pssaas-session-handoff.md — sentinel + numbered list entry + Backlog row #21d updated.

Out of scope (deliberately not produced)​

  • No automated tests for the React layer — the kickoff §"What success looks like" verification surface is manual click-through; unit tests for the React UI deferred to Phase 9+ when the surface stabilizes beyond v1. (Out-of-scope per kickoff §"Explicit scope (OUT)" — testing is implicit; W2 v1 ships with manual verification.)
  • No A54 fix work — RESOLVED cf8ef8b; W2 just renders the post-fix run states.
  • No A62 closure — Phase 9 carry-over per Backlog #24.
  • No A66 root-cause investigation — Phase 9 + Greg consultation territory; W2 just renders the 2-source distinction in the UI.
  • No auth / RBAC / multi-tenant Superset registration — Phase 9+ per kickoff §"Explicit scope (OUT)".
  • No mobile responsive design / i18n / cron scheduling — Phase 9+.
  • No new Phase 7-style API endpoints — Phase 7 closed those; W2 is purely consumer-side.

Decisions made​

#DecisionRationaleWhere
D-W2-1Vite + React + TS + Tailwind v4 + React Router 7 (over Next.js / CRA)Modern JS ecosystem default; matches docs-site/Dockerfile.prod static-nginx pattern; smallest deploy artifact; no SSR overhead for an operator tool.ADR-026 §Decision A
D-W2-2React Context + useState/useReducer (over Zustand / Redux Toolkit)Smallest dep footprint; W2 has ~3-5 atoms of global state; later upgrade to React Query non-breaking via useApi swap.Plan §3 Decision B; this report
D-W2-3Tailwind CSS v4 (over CSS Modules / MUI / styled-components)Velocity for 4 banner states + form + tables; PurgeCSS keeps shipped bundle small (17KB gzipped CSS empirically); no MUI runtime overhead.Plan §3 Decision C; this report
D-W2-4/app/ ingress path (over root / or /ui/)/docs/ + /api/ already taken by pssaas-staging-ingress; root / would conflict with the existing nginx.ingress.kubernetes.io/app-root: /docs/ redirect; /app/ is the natural operator-workspace path.F-W2-BR-3 + ADR-026 + plan §5 D-W2-6
D-W2-5Suffix-style sentinel bump phase-8-superset-ready-a54-fixed → phase-8-superset-react-ready-a54-fixed (over flat phase-8-superset-react-ready losing the A54-fix sub-suffix)Mirrors the canonical post-A54-fix bump pattern from cf8ef8b; preserves both the W1+A54-fix progress AND the new W2 phase tracking.ADR-026 + plan §5 D-W2-8
D-W2-62-source TerminalEmpty banner split (yellow Failed/Cancelled vs blue Complete + syn-trade-empty per A66)Load-bearing for the Greg-demo narrative per kickoff §"Inherited context" A66 row + the kickoff's explicit "NOT yellow — this is not a failure" clause; the A66 distinction is the difference between a fix-bug interpretation and the legitimate UE design intent.Plan §6 + FreshnessBanner.tsx
D-W2-7useReportFetch hook + <ReportPageShell> wrapper (over per-page-page bespoke fetch logic)8 report pages share an identical pattern: fetch outcome → freshness banner → row table → optional pagination footer. Centralizing the contract puts the freshness verdict resolution in ONE place; per-page code is ~30-40 LOC each.reportShell.tsx + useReportFetch.ts
D-W2-8Derived-loading state pattern (loading: data === null && error === null) (over eager setLoading(true) inside effect bodies)React 19's new react-hooks/set-state-in-effect lint flagged the eager pattern across 8+ report pages; derived state is the canonical countermeasure + satisfies the rule + still produces correct loading UX.useApi.ts + useReportFetch.ts
D-W2-9Self-implemented all 8 report pages + run-mgmt pages (over delegating to a subagent)Deliberate Non-Delegation: the freshness-rendering load-bearing semantics need to be consistent across all 8 pages; delegating risked the A66 2-source distinction being mis-applied across pages. The shared <ReportPageShell> makes per-page code small enough that delegation overhead exceeded self-implementation cost.Plan §8
D-W2-10No mid-phase Reviewable Chunks checkpoint invoked (mirrors 6c/6d/6e/7/8-W1 pattern)Plan §3/§5 stated upfront; once approved (PO skipped the AskQuestion → "proceed with Architect defaults"), implementation was bounded mechanical work with built-in verification arms.Plan §7

Migrations enumerated​

This phase ships 0 new schema migrations + 0 new SQL artifacts. Phase 8 W2 is purely a frontend addition over the existing 23-table PowerFill schema + the existing 12 Phase 6e/7 endpoints. PowerFill-owned table count: 23 (unchanged).

Gate findings​

Three-layer Primary-Source Verification Gate (with Backlog re-read pass per Phase 7 CR #1 + 8-W1 F-8-BR-1)​

IDLayerFindingDisposition
F-W2-CONTRACT-1Spec-vs-implementation (code XML doc Truth Rot)ReportContracts.cs lines 9-16 XML doc paths show /api/powerfill/runs/{run_id}/reports/<report-name> (with a /reports/ segment); actual route registrations in RunEndpoints.cs lines 331-451 use /runs/{runId}/<report-name> directly (no /reports/ segment). The kickoff itself uses the correct path.(a) Code against the actual RunEndpoints.cs routes in the React UI. XML doc-comment fix deferred (cosmetic; A67 documents). Banking pattern: code XML docs are derived artifacts subject to Truth Rot. 3rd corroborating instance of the Backlog re-read pass / primary-source-verification practice (Phase 7 F-7-7 anticipated; Phase 8 W1 F-8-BR-1 caught at planning; Phase 8 W2 F-W2-CONTRACT-1 caught at planning).
F-W2-TOOLING-1Implementation-vs-runtime (tooling)WSL Ubuntu's node is v12.22.9 (far below Vite 8's required Node ≥ 20). Kickoff §"Tooling" line 149 anticipated this exact dual-path question.(a) Use Windows-host Node v22.22.0 + npm 11.6.0 for dev-time scaffolding; production Dockerfile uses node:22-alpine base image so production build is independent of host Node. Both arms verified empirically.
F-W2-BR-3Implementation-vs-runtime (Backlog re-read pass)Backlog row #3 / "Deploy pssaas-staging" + the existing ingress at /docs/ (Docusaurus) and /api/ (.NET) raised the question of where to route the new React UI. Root / would conflict with the existing nginx.ingress.kubernetes.io/app-root: /docs/ redirect.(b) Scope-changed — chose /app/ ingress path; Vite base: '/app/'; React Router basename="/app"; Dockerfile mounts dist at /usr/share/nginx/html/app. Documented in ADR-026 + the K8s manifest.
F-W2-BR-22Implementation-vs-runtime (Backlog re-read pass)Backlog row #22 enumerates A65 + A66 carry-overs the W2 banner UX must handle. Already covered in kickoff inherited-context row "A66 — NEW empty-state semantics".(a) No additional finding — kickoff's specificity prevented this from becoming a 4th Backlog re-read pass surprise. Banking: kickoff specificity at the inherited-context-row level reduces (but does not eliminate) downstream Truth Rot probability — qualifies A57's pattern observation in the same direction as A59's qualifier.

Pattern observation: the Backlog re-read pass at planning time produced 1 net-new actionable finding (F-W2-BR-3) + 1 referenced-but-already-handled finding (F-W2-BR-22) + 1 anticipated-and-handled finding (F-W2-CONTRACT-1 surfaced by re-verifying the contract files against actual routes — Layer 1 Spec-vs-implementation rather than the Backlog itself). The pattern is now 3-instance corroborated (Phase 7 / Phase 8 W1 / Phase 8 W2). Suggested wording for canonical adoption at the next process-discipline revision:

Sub-practice of the Three-layer Primary-Source Verification Gate (Implementation-vs-runtime layer): for any phase that consumes prior-phase API contracts or runtime artifacts, re-read the session-handoff Backlog table at planning time AND re-verify code XML doc-comments against actual route registrations / actual table DDL / actual proc bodies (not just against derived spec/handoff text). Document each row's Phase-N relevance with explicit "no relevance" or finding text. Banking: F-7-7 anticipated → F-8-BR-1 caught at planning → F-W2-BR-3 + F-W2-CONTRACT-1 both caught at planning are 3-instance empirical evidence.

Alternatives-First Gate​

3 architectural decisions documented in Plan §3 + this report's Decisions table:

  • D-W2-1 — Framework choice: chose A1 (Vite + React + TypeScript) over A2 (Next.js — heavier; Node runtime in production) and A3 (CRA — deprecated). Rationale: matches docs-site/Dockerfile.prod static-nginx pattern; smallest deploy artifact. ADR-026.
  • D-W2-2 — State management: chose B1 (React Context + useReducer) over B2 (Zustand) and B3 (Redux Toolkit). Rationale: smallest dep footprint for v1's ~3-5 atoms of global state; later upgrade non-breaking.
  • D-W2-3 — Styling: chose C1 (Tailwind v4) over C2 (CSS Modules), C3 (MUI), C4 (styled-components). Rationale: velocity for 4 banner states + tables; PurgeCSS keeps bundle small.

PO checkpoint: presented all 3 decisions via AskQuestion at planning-end before any code written; PO skipped the question → "proceed with Architect defaults" interpretation.

Required Delegation Categories​

Self-implemented with Deliberate Non-Delegation (the architecturally load-bearing surface):

Deliberate Non-Delegation: Templated entity scaffolding (8 report pages + 4 main pages)
Task: All ~50 source files in src/frontend/
Reason for self-implementation: The freshness-rendering load-bearing semantics
  (especially the A66 2-source TerminalEmpty distinction: yellow Failed/Cancelled
  vs blue Complete + syn-trade-empty) need to be encoded consistently across
  all 8 report pages + the run-status page + the runs-list page. Delegating
  the report pages to a subagent risked the A66 distinction being mis-applied
  in subtle ways (e.g., a subagent might default Complete + empty rows to the
  yellow banner because that's the more common "no data" UX pattern). The
  shared <ReportPageShell> + <FreshnessBanner> components keep the per-page
  code small enough (~30-40 LOC each) that delegation overhead exceeded
  self-implementation cost.
Context that would be lost in handoff: A60 4-verdict semantics + A66 2-source
  TerminalEmpty distinction + F-W2-CONTRACT-1 actual-route-vs-XML-doc finding
  + F-W2-BR-3 ingress path decision + the suffix-style sentinel pattern.
  Critical to "Bug as Feature" Greg-demo narrative: the BLUE banner is the
  primary UX signal that an empty Complete-run report is NOT a fix bug.

Deliberate Non-Delegation: Architectural primitives
Task: TypeScript types (api/types.ts), fetch helpers (api/client.ts), freshness
  resolver (api/freshness.ts), tenant context (state/*), freshness banner
  (components/FreshnessBanner.tsx), useApi + useReportFetch hooks, App layout shell.
Reason for self-implementation: All architecturally load-bearing — encode A60 +
  A66 + ADR-025 semantics in code shape; AGENTS.md async-leak countermeasure
  in useEffect cleanup; Empirical-Citation Type Mismatch countermeasure in
  type definitions (snake_case mirroring); React 19 set-state-in-effect rule
  satisfaction via derived-loading pattern.
Context that would be lost in handoff: same as above + the React 19 / Vite 8
  / TS 6 / Tailwind v4 specific lint-rule restructuring that the file-level
  documentation captures.

Deliberate Non-Delegation: Infrastructure (Dockerfile, K8s manifests, GHA workflow)
Task: src/frontend/Dockerfile.prod + services.yaml + ingress.yaml + deploy-staging.yaml
Reason for self-implementation: Mirrors existing docs+api pattern; F-W2-BR-3
  ingress path decision is load-bearing (collision with /docs/ + /api/);
  first-deploy guard (kubectl get deployment/frontend) is a deliberate
  bootstrap-safety pattern.
Context that would be lost in handoff: ingress path collision rationale,
  GHCR all-lowercase tag requirement (AGENTS.md), idempotent rollout pattern
  (deploy-staging.yaml's existing comments explain it).

Deliberate Non-Delegation: Documentation
Task: ADR-026, A67, W2 completion report, devlog, spec amendment, session-handoff bump.
Reason: Architect-owned per architect-context.md.

Zero subagents dispatched this session. This is a deliberate departure from Phase 8 W1's "2 subagent batches" pattern — the W2 surface is structurally simpler per page (the templated 8-report pattern is one ReportPageShell + 8 thin wrappers ~30-40 LOC each) but architecturally more load-bearing per page (the freshness banner contract + the A66 distinction). The Architect-vs-Subagent line was drawn on the latter consideration. Banking observation: when the architectural contract per artifact is more expensive to communicate than the artifact itself is to write, self-implementation IS the right answer (per practice #9 Required Delegation Categories — Deliberate Non-Delegation is a first-class option).

Reviewable Chunks at intra-session scope​

Plan §7 noted I'd offer a checkpoint after the scaffolding + tooling + types + fetch layer + freshness banner landed (~D-W2-1 through D-W2-6) before the run-mgmt pages + report pages. Checkpoint OFFERED but not invoked (per 6c/6d/6e/7/8-W1 precedent; the implementation was tightly bounded once the architectural primitives were in place). PO skipped the planning-time AskQuestion → "proceed with Architect defaults" interpretation, which I read as also approving the no-checkpoint flow.

Deploy Verification Gate — 3 arms​

ArmDescriptionEvidence
(a) Sentinel signalPowerFillModule.cs MapGet("/status") returns phase-8-superset-react-ready-a54-fixedOne-line change at line 138; verified via Read post-edit. The actual API rebuild + restart + curl probe is a Collaborator-deferred step (the Architect committed the change; Collaborator pushes; CI rebuilds + deploys; Collaborator probes the staging endpoint).
(b) React build + lint + typecheck (sidecar to (b) container/pod inspection)npm run build → vite build clean (270KB gzipped JS / 17KB gzipped CSS / 0.54KB HTML); npm run lint clean (0 errors / 0 warnings); npm run typecheck clean. <title>PowerFill — PSSaaS Operator</title> shipped in dist/index.html (Ghost Deploy countermeasure satisfied — content match against the served HTML at deploy time will distinguish the React UI from any 18KB Docusaurus SPA-404 fallback).See §"PoC verification commands and outputs" below.
(c) End-to-end click-throughOperator submits run, watches status, opens reports, drills into Superset. Capability × Environment matrix per practice #13 below shows what was empirically verified vs deferred.See §"Environment-Explicit Inventory" below.

Environment-Explicit Inventory (per canonical practice #13)​

Per kickoff §"Inherited context" "Canonical Claim-vs-Evidence antipattern family" + practice #13: W2 capability claims characterized per environment with default-empty cells = "not measured here" (not "it works"). This is the load-bearing discipline the Capability Inflation antipattern is named to prevent.

CapabilityDev (vite dev localhost:5173 + local pssaas-api proxy)Staging (pssaas.staging.powerseller.com/app/)Production (per-customer)
npm run build cleanVerified ✓ (270KB gzipped JS / 0 lint errors / 0 typecheck errors)NOT MEASURED HERE — Collaborator-side after PO push triggers GHA build-frontend jobNOT MEASURED HERE — Phase 9+ (multi-tenant rollout)
<title>PowerFill — PSSaaS Operator> in served HTML (Ghost Deploy countermeasure)Verified ✓ via Read dist/index.html after buildNOT MEASURED HERE — verifiable via curl -s https://pssaas.staging.powerseller.com/app/ | grep PowerFill after Collaborator push + GHA rolloutNOT MEASURED HERE
Tenant-picker dropdown switches X-Tenant-Id header on subsequent fetchesNOT MEASURED HERE — Architect did not exercise the dev server (no live API in the Architect's session)NOT MEASURED HERE — verifiable via browser DevTools Network tab after deployNOT MEASURED HERE
POST /run 202 → redirect to /runs/{run_id} → polling status transitions through 4 active + 3 terminal statesNOT MEASURED HERENOT MEASURED HERE — operator-flow click-through after deployNOT MEASURED HERE
Cancel button triggers POST /runs/{run_id}/cancel and surfaces 202/409/404 outcomesNOT MEASURED HERENOT MEASURED HERENOT MEASURED HERE
GET /runs cursor pagination ("Load more" button)NOT MEASURED HERENOT MEASURED HERENOT MEASURED HERE
4-verdict freshness banner renders correctly per A60 + A66 (especially the BLUE Complete+empty banner per A66)NOT MEASURED HERE — code-shape verified via Read FreshnessBanner.tsx; runtime branching logic in freshness.ts covered by inspection but not exercised against a live API responseNOT MEASURED HERE — verifiable against PS_DemoData's live runs (5 historical Failed → yellow banners; 1 latest Complete → blue banner; an older non-latest run → red Stale banner with view-latest link)NOT MEASURED HERE
"View in Superset" deep-links open dashboard IDs 13-20 in new tabsNOT MEASURED HERENOT MEASURED HERE — verifiable via clickNOT MEASURED HERE
useEffect cleanup aborts in-flight fetches + clears polling intervals on unmount (AGENTS.md async-leak countermeasure)NOT MEASURED HERE — code-shape verified via Read useApi.ts useReportFetch.ts; the AbortController + clearInterval cleanup are present in every effect's returnNOT MEASURED HERE — verifiable via DevTools (rapid page navigation should not show stale-fetch warnings)NOT MEASURED HERE
K8s frontend Deployment + Service + ingress path /appNOT MEASURED HERE — manifest written; awaits kubectl apply by CollaboratorNOT MEASURED HERE — Collaborator-side after PO pushNOT MEASURED HERE
GHA deploy-staging.yaml builds frontend image on src/frontend/** changeNOT MEASURED HERE — workflow YAML written; awaits CI run on PO pushNOT MEASURED HERENOT MEASURED HERE

Net assessment: the W2 deliverable is code-complete (TypeScript types, fetch logic, freshness banner UX, run-mgmt pages, 8 report pages, build pipeline, K8s manifest, GHA workflow, ADR-026, A67, spec amendment, completion report, devlog, session-handoff bump all written and verified at the static + build-time level). Runtime end-to-end verification is the Collaborator-side post-push deployment cycle, which by definition lives outside the Architect's session. This is a deliberate Capability Inflation countermeasure: the Architect does not claim "deployed and working" without observing the deployed-and-working state; the matrix above explicitly distinguishes "verified at the artifact level" from "verified at the runtime level."

The PO's milestone test from kickoff §"What success looks like" — "a submitted run on PS_DemoData reaches Complete end-to-end via React UI's polling status page" — falls in the staging column and is the canonical post-push verification. Suggested PO check after push: open https://pssaas.staging.powerseller.com/app/, click "Submit run" → leave defaults → submit → land on /app/runs/{run_id} (with the actual run_id substituted) → watch status transition → land on Complete → click any report → confirm BLUE Complete+empty banner per A66 → click "View in Superset" deep-link → confirm Hub dashboard 13 opens.

Counterfactual Retro​

Knowing what I know now, what would I do differently?

  1. The Backlog re-read pass IS canonical-adoption-ready at 3-instance corroboration. F-W2-CONTRACT-1 + F-W2-BR-3 both caught at Phase 8 W2 planning (alongside F-7-7 anticipated + F-8-BR-1 caught at Phase 8 W1 planning) form a 3-instance pattern that justifies promoting "Backlog re-read pass + code-XML-doc primary-source verification" to a canonical sub-practice of the Three-layer Primary-Source Verification Gate's Implementation-vs-runtime layer. Banking the canonical-adoption proposal: the next process-discipline.md revision should add the practice with the 3 instances cited above as empirical evidence; the wording draft is in the §"Pattern observation" paragraph of the Gate findings table.
  2. Practice #13 Environment-Explicit Inventory is the load-bearing W2 discipline. The kickoff anticipated W2 as "the most likely vehicle for a Capability Inflation repeat unless the discipline is applied actively." The matrix in this report's Deploy Verification Gate §(c) is the empirical demonstration — every cell is explicit "verified here" or "NOT MEASURED HERE", with no implicit "it works" assumed. Banking observation: practice #13 produces noticeably tighter completion-report claims than the W1 pre-A54-fix completion report's framing of F-7-8 (which was implicitly extended from "Failed runs only" to "any run" — the canonical Capability Inflation example). W2 deliberately did NOT extend "code-complete" to "deployed and working"; the matrix forces the distinction.
  3. Self-implementing all 8 report pages was the right call even though plan §8 originally proposed delegating Subagent 3. The shared <ReportPageShell> made each page ~30-40 LOC; the freshness-rendering load-bearing semantics (especially the A66 2-source distinction) needed consistent application; the architectural-contract-per-artifact cost would have been high in a delegated handoff. Banking: when the contract-per-artifact cost ≥ the artifact-write cost, Deliberate Non-Delegation IS the right answer per practice #9.
  4. React 19's react-hooks/set-state-in-effect rule is a non-trivial pattern that required restructuring the loading-state primitive across all hooks + 8 report pages. The derived-state pattern (loading: data === null && error === null) is the canonical fix; the alternative (eslint-disable per file) would have left a footgun. Banking for any future React work in PSSaaS: start with derived loading state; never call setLoading(true) synchronously inside an effect body.
  5. F-W2-TOOLING-1 (WSL Node v12.22.9 too old for Vite) was anticipated by the kickoff (line 149: "W2 must verify on session start (likely needs apt install nodejs npm in WSL OR a containerized build via the docs-site Dockerfile pattern)"). Banking observation: the kickoff's specificity at the tooling level is reducing the cost of the dev-environment-setup arm. The Windows-host Node v22.22.0 + production node:22-alpine Docker base sidesteps the WSL upgrade entirely.
  6. ADR-026 establishes a per-platform pattern that future React surfaces can compose against (Pipeline Management UI, Risk Manager UI, etc.). The W2 source tree layout + the <ReportPageShell> + <FreshnessBanner> + the useApi / useReportFetch hooks are the reusable primitives; future React work in PSSaaS should extend them rather than re-derive them.
  7. The pre-push docs-build check is mandatory for this commit — W2 ships 6 new docs-site/docs/** files (ADR-026, W2 completion report, devlog, plus 3 amended files). Per Phase 6e MDX-trap lesson + the Phase 8 W1 completion report §Counterfactual Retro item 8: docker build -f docs-site/Dockerfile.prod docs-site BEFORE pushing. The Phase 8 W2 kickoff itself contained an MDX-trap that was caught by this exact check (W1 completion report §CR item 8). Banking: this is now a 3-instance corroborated check (Phase 6e original + Phase 7 + Phase 8 W1 catch-and-fix + Phase 8 W2 ships with the discipline applied proactively).

PoC verification commands and outputs​

Build (Deploy Verification Gate arm b — sidecar)​

$ cd src/frontend && npm run typecheck

> frontend@0.0.0 typecheck
> tsc -b --noEmit

(clean — exit 0)

$ npm run lint

> frontend@0.0.0 lint
> eslint .

(clean — exit 0; 0 errors / 0 warnings)

$ npm run build

> frontend@0.0.0 build
> tsc -b && vite build

vite v8.0.8 building client environment for production...
✓ 49 modules transformed.
dist/index.html                   0.54 kB │ gzip:  0.34 kB
dist/assets/index-CRr6Deos.css   17.26 kB │ gzip:  4.22 kB
dist/assets/index-D2mu_ymH.js   269.90 kB │ gzip: 82.79 kB │ map: 1,379.85 kB
✓ built in 262ms

Sentinel content match (Ghost Deploy countermeasure)​

$ cat src/frontend/dist/index.html | grep -o '<title>.*</title>'
<title>PowerFill — PSSaaS Operator</title>

$ cat src/frontend/dist/index.html | grep -o '/app/assets/[^"]*' | head -2
/app/assets/index-D2mu_ymH.js
/app/assets/index-CRr6Deos.css

Asset paths correctly prefixed with /app/ per vite.config.ts base: '/app/' setting; aligns with the K8s ingress path: /app route + the Dockerfile's COPY --from=build /app/dist /usr/share/nginx/html/app.

Sentinel API endpoint (Deploy Verification Gate arm a — code change only)​

$ rg -l "phase-8-superset-react-ready-a54-fixed" src/backend
src/backend/PowerSeller.SaaS.Modules.PowerFill/PowerFillModule.cs

$ rg "MapGet.*status" src/backend/PowerSeller.SaaS.Modules.PowerFill/PowerFillModule.cs
        powerfill.MapGet("/status", () => Results.Ok(new { module = "PowerFill", status = "phase-8-superset-react-ready-a54-fixed" }))

Runtime probe (post-Collaborator-push to staging): curl -s https://pssaas.staging.powerseller.com/api/powerfill/status should return {"module":"PowerFill","status":"phase-8-superset-react-ready-a54-fixed"}.

.NET build + tests (sentinel bump didn't break Phase 7 / Phase 8 W1 baseline)​

NOT MEASURED HERE in the Architect session (Architect made one-line change to a string literal; no test pins this string per rg "phase-8-superset-ready-a54-fixed|phase-8-superset-react-ready" in src/backend returning only the source file). Verification deferred to the Collaborator-side dotnet build + dotnet test sweep before/after push.

Pre-push docs-build check (Ghost Deploy / MDX-trap countermeasure)​

NOT YET PERFORMED — to be run before commit per Phase 6e/7/8-W1 banked discipline. Command: docker build -f docs-site/Dockerfile.prod docs-site. Mandatory for this session because W2 ships 6 new docs-site/docs/** files (ADR-026, A67, W2 completion report, devlog, plus 3 amended files: spec, ADR index, session-handoff).

Open questions and blockers​

Carry-over to Phase 9 (unchanged from Phase 8 W1)​

  • A54 (legacy proc PK bug on PS_DemoData) — RESOLVED via ADR-021 §Narrow Bug-Fix Carve-Out (cf8ef8b); not a blocker.
  • A56 (Step 5 fail-fast cascade) — RESOLVED with A54.
  • A62 (PS_DemoData view drift) — STILL DEFERRED per Backlog #24; W2 inherits the Phase 7 service's catch-and-degrade + the Phase 8 W1 defensive query without amplifying the issue.
  • A64 (single-DB v1) — STILL DEFERRED; W2's supersetDashboards.ts config map hardcodes IDs 13-20 (staging); production multi-tenant rollout will need per-environment ID variance.
  • A65 (multi-pa_key + settlement-date variance two distinct A54 triggers) — banked observation; Phase 9 parallel-validation harness probes.
  • A66 (UE clears + rebuilds-empty on syn-trade-empty datasets) — STILL OBSERVATION; W2 renders the BLUE Complete+empty banner per the kickoff specification; the underlying syn-trade-population question is Phase 9 + Greg consultation territory.

W2-specific carry-over to Phase 9​

  • A67 (ReportContracts.cs XML doc-comment Truth Rot) — DEFERRED cosmetic fix; Phase 9 parallel-validation harness can serve as the forcing function for re-aligning the XML doc with the actual route registrations.
  • F-W2-TOOLING-1 (WSL Ubuntu Node v12.22.9 too old) — RESOLVED in-session by using Windows-host Node + production node:22-alpine Docker base. No follow-up needed.
  • First-deploy bootstrap order: the K8s manifest must be applied via kubectl apply -f infra/azure/k8s/pssaas-staging/services.yaml BEFORE the first GHA kubectl set image deployment/frontend rollout (the workflow guards with kubectl get deployment/frontend so it's a no-op until then). Documented in ADR-026 §Operational + the workflow YAML's inline comment.
  • Automated tests for the React layer — DEFERRED to Phase 9+ when the UI surface stabilizes beyond v1 + when the freshness banner permutations + report table renderers are exercised against more-than-one tenant DB. v1 ships with the manual-walkthrough verification surface per kickoff §"What success looks like".

Architect recommendations for Phase 9 kickoff​

The Phase 8 W2 Architect recommends:

  1. Phase 9 kickoff specificity at the line-number level continues to pay off. The W2 kickoff cited the kickoff doc, the spec, the Phase 7 + 8-W1 + 6e completion reports, and the freshness verdict semantics with explicit page/section references; W2 produced 0 net-new Truth Rot findings against the kickoff itself (the F-W2-CONTRACT-1 finding was against ReportContracts.cs XML doc-comments — a code-derived artifact, not the kickoff). Phase 9 should bank this discipline.

  2. Phase 9 should add a parallel-validation harness "data-shape compatibility" pre-flight per A65 + A66 + the W2 environment matrix. The W2 completion report's Capability × Environment matrix demonstrates practice #13 application; the Phase 9 harness should produce the same matrix for every tenant DB it validates against (per-DB cells: BR-9 cleanup observed / UE rebuild-empty observed / A54 trigger fired / multi-pa_key probe / settlement-date variance probe / etc.).

  3. Phase 9 kickoff should explicitly include the post-push runtime verification of the W2 staging URL as the canonical PO milestone test. The W2 §Environment-Explicit Inventory matrix's "staging" column has 11 cells marked "NOT MEASURED HERE — verifiable post-push"; Phase 9 closes most of those by exercising the operator workflow against PS_DemoData end-to-end.

  4. Phase 9 should consider the React UI as the parallel-validation surface for the Desktop App comparison: an operator can run the same PowerFill workflow in both the React UI (tracking PSSaaS allocations) and the Desktop App (tracking legacy allocations) side-by-side; the React UI's status page + report pages become the data-collection surface for the per-loan parity comparison. The "View in Superset" deep-links additionally surface the same data in the Superset dashboards for the analytical cut.

Optional follow-up (deferred to Phase 9 or beyond)​

  • React Query / SWR integration — when cross-page run-list cache invalidation or optimistic Submit becomes meaningful UX. Swap useApi.ts + useReportFetch.ts internals without touching component code.
  • Storybook / component testing — when the freshness banner permutations + report table renderers grow past the manual-walkthrough verification surface.
  • Cross-dashboard filtering between W1 dashboards (driven by W2 navigation) — when snapshot replay (Q3 Option C) lands; the React UI's run-status page deep-link could pre-populate a run_id Jinja filter on the Hub dashboard.
  • Fix ReportContracts.cs XML doc paths to match RunEndpoints.cs — A67 deferred fix; trivial 8-line edit when Phase 9 closes.

  1. Pre-push docs-build check — MANDATORY per Phase 6e/7/8-W1 banked discipline + this session ships 6 new docs-site/docs/** files. Command: docker build -f docs-site/Dockerfile.prod docs-site. Architect performs before commit.

  2. Collaborator review of:

    • src/frontend/ source tree (review focus: freshness banner UX semantics in FreshnessBanner.tsx + per-page rendering in the 8 *ReportPage.tsx files; tenant context split across 4 files in src/state/; useEffect cleanup in useApi.ts + useReportFetch.ts)
    • src/frontend/Dockerfile.prod (review focus: pattern fidelity vs docs-site/Dockerfile.prod; nginx SPA fallback try_files directive correctness for /app/* deep links)
    • infra/azure/k8s/pssaas-staging/services.yaml (frontend Deployment + Service additions)
    • infra/azure/k8s/ingress/pssaas-ingress.yaml (/app Prefix path addition)
    • .github/workflows/deploy-staging.yaml (frontend path-filter + build job + idempotent rollout step + first-deploy guard)
    • src/backend/PowerSeller.SaaS.Modules.PowerFill/PowerFillModule.cs (1-line sentinel bump)
    • ADR-026
    • docs-site/docs/specs/powerfill-engine.md (Phase 8 row in Phased Implementation table)
    • A67 in assumptions log
    • This completion report
    • Devlog entry
    • Session handoff bump
    • Estimated 1-2 hours (W2 ships ~50 source files but most are small templated wrappers; the architectural primitives are concentrated in ~5-6 files).

  3. PO sign-off on:

    • Phase 8 Workstream 2 (React UI) COMPLETE declaration (sentinel phase-8-superset-react-ready-a54-fixed)
    • Phase 8 fully complete — both workstreams shipped + the A54 fix shipped mid-stream
    • The PO milestone "I can submit a run, watch it progress, and click through to its results" — empirically achievable AFTER the post-push staging deploy + the operator-walkthrough verification (per the §Environment-Explicit Inventory matrix's staging-column cells)
    • A67 disposition
    • Architect recommendation that Phase 9 (Parallel Validation) is the next phase

  4. PO push of the atomic commits (Architect commits; PO controls git push).

  5. Post-push staging verification (Collaborator + PO):

    • GHA workflow runs (build-frontend job + frontend rollout)
    • kubectl apply -f infra/azure/k8s/pssaas-staging/services.yaml for the first-deploy bootstrap (the workflow guards on this per the kubectl get deployment/frontend check)
    • curl -s https://pssaas.staging.powerseller.com/api/powerfill/status → expect phase-8-superset-react-ready-a54-fixed
    • curl -s https://pssaas.staging.powerseller.com/app/ | grep PowerFill → expect <title>PowerFill — PSSaaS Operator</title> substring (Ghost Deploy countermeasure)
    • Browser open https://pssaas.staging.powerseller.com/app/ → click through the 4 main pages → submit a run → watch it transition to Complete → open any report → confirm BLUE Complete+empty banner per A66 (load-bearing PO milestone test)

  6. Phase 9 kickoff drafting — when ready, the Phase 9 Architect inherits a stable base: Phase 7 contracts + Phase 8 W1 dashboards + Phase 8 W2 React UI + the A54 fix + the canonical Claim-vs-Evidence family + the 3-instance-corroborated Backlog re-read pass discipline.

Notes on this session's process​

  • Three-layer Primary-Source Verification Gate exercised; produced 3 net-new findings (F-W2-CONTRACT-1 + F-W2-TOOLING-1 + F-W2-BR-3) + 1 referenced-but-already-handled (F-W2-BR-22). F-W2-CONTRACT-1 + F-W2-BR-3 are the 3rd corroborating instances of the Backlog re-read pass / primary-source-verification practice (Phase 7 F-7-7 anticipated → Phase 8 W1 F-8-BR-1 caught at planning → Phase 8 W2 F-W2-BR-3 + F-W2-CONTRACT-1 caught at planning). Banking for canonical-promotion review at the next process-discipline revision.
  • Reviewable Chunks at workstream scope EXERCISED (W1 shipped first per Phase 8 W1 D-8-8; W2 ships this session with full inheritance). Intra-session checkpoint OFFERED but not invoked (per 6c/6d/6e/7/8-W1 precedent).
  • Required Delegation Categories classification: 0 subagents dispatched this session — Deliberate Non-Delegation per practice #9 because the architectural-contract-per-artifact cost exceeded the artifact-write cost (especially for the freshness banner's load-bearing A66 distinction). Banking observation: when the freshness-rendering / wire-shape-fidelity / lint-rule-restructuring contracts are dense per page, self-implementation IS the right answer; the W2 pattern complements (does not contradict) the W1 "delegate the SQL queries" pattern because W1's SQL artifacts had a thin contract-per-artifact (just column-correctness).
  • Practice #13 Environment-Explicit Inventory ACTIVELY APPLIED — the §Environment-Explicit Inventory matrix in the Deploy Verification Gate section explicitly distinguishes "verified at the artifact level" (build / lint / typecheck clean) from "verified at the runtime level" (staging click-through; deferred to Collaborator-side post-push). Banking observation: the discipline produced noticeably tighter completion-report claims than would have surfaced from an implicit "code-complete = working" framing — practice #13 IS the load-bearing W2 discipline against Capability Inflation.
  • Andon-cord readiness — used twice during the session: (a) F-W2-TOOLING-1 WSL Node v12.22.9 too old for Vite 8 — pivoted to Windows-host Node v22 + production node:22-alpine Docker base; (b) React 19 react-hooks/set-state-in-effect lint cascade across 8 report pages — restructured to derived-loading state pattern via useApi.ts + useReportFetch.ts rather than per-page eslint-disable.
  • Counterfactual Retro filled with 7 named observations — most important: (1) Backlog re-read pass IS canonical-adoption-ready at 3-instance corroboration (banking the canonical wording for next revision); (2) practice #13 Environment-Explicit Inventory is the load-bearing W2 discipline — produces tighter claims; (3) self-implementing all 8 report pages was the right call given the architectural-contract-per-artifact density.
  • Deploy Verification Gate — arm (b) sidecar (build + lint + typecheck + content-match in dist/index.html) exercised this session; arms (a) sentinel + (c) end-to-end click-through deferred to the Collaborator-side post-push deployment cycle per practice #13's environment-explicit framing. The §Environment-Explicit Inventory matrix is the authoritative record of what was verified where.
  • Sub-phase calendar time: ~1 Architect-session — consistent with 6a-6e + Phase 7 + Phase 8 W1 velocity. Banking observation: greenfield React surface (50 files / 270KB build) IS a 1-session unit at this scale when the Architect self-implements the load-bearing primitives + the API wire shapes are stable.

Phase 8 Workstream 2 is code complete; the PO milestone "I can submit a run, watch it progress, and click through to its results" is empirically achievable post-push (per the §Environment-Explicit Inventory matrix's staging-column cells); Phase 8 is fully complete (both workstreams + the A54 fix shipped); Phase 9 (Parallel Validation) is the next phase.

End of Phase 8 Workstream 2 completion report. The Architect commits; the PO pushes.