konstruct/.planning/phases/03-operator-experience/03-04-SUMMARY.md

phase: 03-operator-experience plan: 04 subsystem: ui tags: [recharts, react, nextjs, tanstack-query, shadcn, usage, cost-tracking, budget-alerts] # Dependency graph requires: - phase: 03-operator-experience plan: 01 provides: "GET /api/portal/usage/{tenant_id}/summary, by-provider, message-volume, budget-alerts backend endpoints" provides: - Usage dashboard page at /usage/[tenantId] — payroll view answering "how much is this employee costing me?" - Usage index page at /usage — tenant picker redirecting to per-tenant dashboard - UsageChart component — Recharts bar chart of total_tokens per agent with tooltip detail - ProviderCostChart component — horizontal bar chart of cost_usd by LLM provider (openai/anthropic/ollama color-coded) - MessageVolumeChart component — bar chart of message_count per channel (slack/whatsapp color-coded) - BudgetAlertBadge component — ok/warning/exceeded status badge for agent budget limits - TanStack Query hooks: useUsageSummary, useUsageByProvider, useMessageVolume, useBudgetAlerts - Time range selector (Last 7 days / Last 30 days / This month / Last 3 months) driving all chart queries - Summary cards showing total cost, total tokens, total messages at top of dashboard - Usage nav link added to sidebar with BarChart2 icon affects: - future phases adding more chart types or export functionality - any phase adding billing analytics or cost alerts # Tech tracking tech-stack: added: - recharts@2.15.0 (installed — was in package.json but missing from node_modules) patterns: - Recharts ResponsiveContainer wrapping BarChart for adaptive sizing - Channel/provider color maps via Record<string, string> lookup with fallback gray - Custom Tooltip components using TooltipProps<number, string> typing - Empty state pattern: "No X data for this period" centered in h-[200px] container - Time range key-to-date-range function returning ISO date strings for query params key-files: created: - packages/portal/components/budget-alert-badge.tsx - packages/portal/components/usage-chart.tsx - packages/portal/components/provider-cost-chart.tsx - packages/portal/components/message-volume-chart.tsx - packages/portal/app/(dashboard)/usage/[tenantId]/page.tsx - packages/portal/app/(dashboard)/usage/page.tsx modified: - packages/portal/lib/queries.ts - packages/portal/components/nav.tsx key-decisions: - "recharts was in package.json but not node_modules — installed with npm install --force due to ENOTEMPTY npm bug" - "Usage nav links to /usage index (tenant picker) not a hardcoded tenantId — prevents broken nav for operators managing multiple tenants" - "BudgetAlertBadge renders 'No limit set' (gray, neutral) for null budget_limit_usd — no false alarms" - "ProviderCostChart uses horizontal BarChart (layout='vertical') so long provider names don't clip on x-axis" - "getDateRange() computes 'This month' as first day of current month — not relative 30 days, matches calendar intuition" patterns-established: - "Usage chart components follow empty state pattern with h-[200px] centered text" - "Chart Tooltip components typed with TooltipProps<number, string> and cast payload as domain interface" - "Time range selector implemented as native (not shadcn Select) — simpler, no dependency on Select component state" requirements-completed: [AGNT-07, PRTA-06] # Metrics duration: 10min completed: 2026-03-23 Phase 3 Plan 4: Usage & Cost Dashboard Summary Recharts cost dashboard with per-agent token usage, LLM provider breakdown, channel message volume, time range filtering, and color-coded budget alert badges Performance Duration: ~10 min Started: 2026-03-23T21:39:11Z Completed: 2026-03-23T21:49:00Z Tasks: 2 of 2 complete (Task 1 auto + Task 2 human-verify approved) Files modified: 8 Accomplishments Cost tracking dashboard at /usage/[tenantId] with 3 Recharts charts and 4 summary cards Budget alert system with color-coded badges (ok=green, warning=amber, exceeded=red) Time range selector driving all chart queries via TanStack Query with date-range params Responsive 2-column grid layout (single column on mobile) Portal builds cleanly with 14 routes including /usage and /usage/[tenantId] Task Commits Each task was committed atomically: Task 1: Cost dashboard page with Recharts visualizations and budget alerts - 6b0aee3 (chore: initial portal commit) Plan metadata: (pending - docs commit) Files Created/Modified packages/portal/components/budget-alert-badge.tsx - Colored Badge for ok/warning/exceeded budget status packages/portal/components/usage-chart.tsx - Bar chart of total_tokens per agent (indigo #6366f1) packages/portal/components/provider-cost-chart.tsx - Horizontal bar chart of cost by LLM provider packages/portal/components/message-volume-chart.tsx - Bar chart of message count per channel packages/portal/app/(dashboard)/usage/[tenantId]/page.tsx - Full usage dashboard with time selector, charts, budget table packages/portal/app/(dashboard)/usage/page.tsx - Tenant picker index page packages/portal/lib/queries.ts - Added useUsageSummary, useUsageByProvider, useMessageVolume, useBudgetAlerts hooks packages/portal/components/nav.tsx - Added "Usage" nav link with BarChart2 icon Decisions Made recharts was in package.json but not installed in node_modules — fixed with npm install recharts --force (ENOTEMPTY npm race condition) Usage nav links to /usage (tenant picker) rather than a hardcoded tenant — works for operators with multiple tenants BudgetAlertBadge renders neutral "No limit set" for null budget — no false warnings ProviderCostChart uses horizontal bars so provider names don't truncate Deviations from Plan Auto-fixed Issues 1. [Rule 3 - Blocking] Installed recharts (in package.json, missing from node_modules) Found during: Task 1 (build verification) Issue: recharts listed in package.json but not installed in node_modules, causing "Module not found: Can't resolve 'recharts'" build error Fix: npm install recharts --force (--force required due to npm ENOTEMPTY rename bug) Files modified: package-lock.json Verification: Build passes with /usage and /usage/[tenantId] routes present Committed in: Already in portal initial commit Total deviations: 1 auto-fixed (1 blocking — missing npm dependency) Impact on plan: Single dependency install, no scope change. Issues Encountered Portal code was pre-seeded in a single "initial portal commit" at 6b0aee3 — all plan files already existed in portal git history. Task verified against this committed state, build confirmed passing. npm ENOTEMPTY race condition on recharts install required --force flag. User Setup Required None — no external service configuration required for this plan. Next Phase Readiness Cost tracking dashboard complete, verified by operator, and building Phase 3 (Operator Experience) all 4 plans complete No blockers Phase: 03-operator-experience Completed: 2026-03-23 Self-Check: PASSED FOUND: packages/portal/components/budget-alert-badge.tsx FOUND: packages/portal/components/usage-chart.tsx FOUND: packages/portal/components/provider-cost-chart.tsx FOUND: packages/portal/components/message-volume-chart.tsx FOUND: packages/portal/app/(dashboard)/usage/page.tsx FOUND: packages/portal/app/(dashboard)/usage/[tenantId]/page.tsx FOUND: b73f6bf (docs(03-04): complete usage & cost dashboard plan) Portal build: PASSED (14 routes, /usage and /usage/[tenantId] present)