feat: Claude Code Monitor — lanes, pipelines and a merged workspace
Internal SmartGift build of a Claude Code monitoring dashboard. Lanes: a durable unit of parallel agent work, one per working directory, tracked across session restarts. Managed lanes are git worktrees the dashboard provisions and can reset or remove behind a three-check destroy guard and a counted preflight; adopted lanes are directories you already own and are never destroyable. Pipelines: a lane moves through pipeline stages. A stage the agent declares with evidence renders green; a stage inferred from the tool-event stream renders dashed amber and never counts as done. Detection is forward-only within a 30-minute window, and never writes the declared stage. Workspace: one page at /run with a lane grid, the selected lane's pipeline, and a full Claude console behind a disclosure.
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/**
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* @file ErrorPropagationMap.tsx
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* @description A React component that visualizes error propagation across agent hierarchies in a workflow system. It displays the distribution of errors by hierarchy depth, identifies error-prone agent types, and highlights API and session errors. The component uses horizontal bars to represent error counts at different depths and types, providing an intuitive overview of where errors are occurring within the agent structure.
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* @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
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*/
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/* =============================================================================
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* MODULE_GUIDE — extended in-file reference (comments only; safe to read, never executed)
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* =============================================================================
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* **Purpose:** Workflow analytics visualization built on D3; consumes aggregated session/run metrics from the workflows API.
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*
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* ## Design constraints
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* - Local-first: no telemetry leaves the machine unless the user configures webhooks.
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* - Fail-safe hooks path on the server must never block Claude Code; UI mirrors that
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* philosophy by degrading gracefully (empty states, stale badges, reconnect loops).
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* - Destructive flows stay behind explicit confirmation modals and server-side gates.
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* - Internationalization: user-visible strings belong in i18n JSON, not literals here.
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*
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* ## Remote data & SSH
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* Remote Data Sources let operators aggregate multiple machines. SSH entries describe
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* how to reach a peer dashboard; the global data scope (`dataScope.ts`) narrows every
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* scoped GET via `?sources=`. Health checks and import history surface in Settings.
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*
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* ## Observability
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* Prometheus scrapes `GET /api/metrics` (see `monitoring/`). Grafana ships four
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* provisioned boards (overview, sessions, tools, alerts). Native npm scripts and
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* Docker Compose profiles are documented in `monitoring/README.md`.
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*
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* ## Internal dependencies
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* - `../../lib/types`
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*
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* ## Public surface
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* - `ErrorPropagationMapProps` — exported API; see TSDoc on the symbol for behavior.
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* - `ErrorPropagationMap` — exported API; see TSDoc on the symbol for behavior.
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*
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* ## Testing pointers
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* - Prefer colocated `__tests__` with Vitest + Testing Library for UI.
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* - Server contract changes require `npm run test:server` and OpenAPI sync.
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* - MCP edits: `npm run mcp:typecheck` and `npm run mcp:build`.
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*
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* ## Related docs
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* - `ARCHITECTURE.md` — hooks → API → SQLite → WebSocket → UI pipeline.
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* - `docs/API.md` — REST reference.
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* - `.claude/skills/file-headers/` — mandatory `@author` header policy.
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* ============================================================================= */
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/* -----------------------------------------------------------------------------
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* EXPORT CATALOG — quick index of symbols defined below (documentation only).
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* -----------------------------------------------------------------------------
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* **ErrorPropagationMapProps**
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* Part of this module's public contract. Downstream imports should treat
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* the signature and return type as stable unless release notes say otherwise.
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* When behavior changes, update the `@file` overview and relevant tests.
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*
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* **ErrorPropagationMap**
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* Part of this module's public contract. Downstream imports should treat
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* the signature and return type as stable unless release notes say otherwise.
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* When behavior changes, update the `@file` overview and relevant tests.
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*
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* ----------------------------------------------------------------------------- */
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import { useState } from "react";
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import { useTranslation } from "react-i18next";
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import type { ErrorPropagationData } from "../../lib/types";
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const DEPTH_COLORS = ["#ef4444", "#f97316", "#eab308", "#a855f7"];
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// ── Component ─────────────────────────────────────────────────────────────────
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export interface ErrorPropagationMapProps {
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data: ErrorPropagationData;
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}
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export function ErrorPropagationMap({ data }: ErrorPropagationMapProps) {
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const { t } = useTranslation("workflows");
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const [hoveredDepth, setHoveredDepth] = useState<number | null>(null);
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function depthLabel(depth: number): string {
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const keys = [
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t("errorPropagation.depthLabels.sessionMain"),
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t("errorPropagation.depthLabels.directSubagent"),
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t("errorPropagation.depthLabels.nested"),
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t("errorPropagation.depthLabels.deep"),
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];
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return keys[depth] ?? `${t("common:depth")} ${depth}`;
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}
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const hasErrors =
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data.byDepth.some((d) => d.count > 0) ||
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data.byType.some((t) => t.count > 0) ||
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(data.eventErrors && data.eventErrors.length > 0) ||
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data.sessionsWithErrors > 0;
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if (!hasErrors) {
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return (
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<div className="flex flex-col items-center justify-center py-16 gap-3">
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<div className="w-12 h-12 rounded-full bg-emerald-500/10 border border-emerald-500/20 flex items-center justify-center">
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<svg
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width="24"
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height="24"
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viewBox="0 0 24 24"
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fill="none"
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stroke="#10b981"
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strokeWidth="2"
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strokeLinecap="round"
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strokeLinejoin="round"
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>
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<path d="M22 11.08V12a10 10 0 1 1-5.93-9.14" />
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<polyline points="22 4 12 14.01 9 11.01" />
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</svg>
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</div>
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<span className="text-sm text-emerald-400 font-medium">
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{t("errorPropagation.noErrors")}
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</span>
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<span className="text-xs text-gray-600">{t("errorPropagation.allSuccess")}</span>
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</div>
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);
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}
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const errorRatePct = data.errorRate;
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const totalErrors = data.byDepth.reduce((s, d) => s + d.count, 0);
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const maxDepthCount = Math.max(...data.byDepth.map((d) => d.count), 1);
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const topTypes = [...data.byType].sort((a, b) => b.count - a.count).slice(0, 6);
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const hasDepthData = data.byDepth.some((d) => d.count > 0);
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return (
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<div className="flex flex-col gap-4">
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{/* Error rate summary bar */}
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<div className="flex items-center gap-3 p-3 rounded-xl bg-red-500/5 border border-red-500/15">
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<div className="flex-shrink-0 min-w-[2.75rem] h-10 px-2 rounded-lg bg-red-500/10 border border-red-500/20 flex items-center justify-center">
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<span className="text-[13px] font-bold text-red-400 tabular-nums whitespace-nowrap">
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{errorRatePct}%
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</span>
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</div>
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<div className="min-w-0 flex-1">
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<p className="text-xs font-medium text-red-300">
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{t("errorPropagation.sessionsErrorSummary", {
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errorSessions: data.sessionsWithErrors,
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totalSessions: data.totalSessions,
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})}
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</p>
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<p className="text-[11px] text-gray-500 mt-0.5">
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{totalErrors > 0
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? `${totalErrors}${t("errorPropagation.agentErrors")}`
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: t("errorPropagation.sessionErrorsOnly")}
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</p>
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</div>
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</div>
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{/* Errors by depth - horizontal bars */}
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{hasDepthData && (
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<div>
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<p className="text-[10px] font-medium text-gray-500 uppercase tracking-wider mb-2.5">
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{t("errorPropagation.errorsByDepth")}
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</p>
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<div className="flex flex-col gap-1.5">
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{data.byDepth
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.filter((d) => d.count > 0)
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.map((d) => {
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const pct = (d.count / maxDepthCount) * 100;
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const color = DEPTH_COLORS[d.depth] ?? DEPTH_COLORS[DEPTH_COLORS.length - 1];
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const isHovered = hoveredDepth === d.depth;
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return (
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<div
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key={d.depth}
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className="flex items-center gap-2.5 group"
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onMouseEnter={() => setHoveredDepth(d.depth)}
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onMouseLeave={() => setHoveredDepth(null)}
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>
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<span className="text-[11px] text-gray-500 w-24 flex-shrink-0 text-right truncate">
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{depthLabel(d.depth)}
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</span>
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<div className="flex-1 h-5 bg-surface-3 rounded overflow-hidden relative">
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<div
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className="h-full rounded transition-all duration-300"
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style={{
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width: `${Math.max(pct, 4)}%`,
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backgroundColor: color,
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opacity: isHovered ? 1 : 0.75,
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}}
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/>
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</div>
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<span
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className="text-xs font-semibold tabular-nums w-7 text-right transition-colors"
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style={{ color: isHovered ? color : "#9ca3af" }}
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>
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{d.count}
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</span>
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</div>
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);
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})}
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</div>
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</div>
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)}
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{/* Error-prone agent types */}
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{topTypes.length > 0 && (
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<div>
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<p className="text-[10px] font-medium text-gray-500 uppercase tracking-wider mb-2.5">
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{t("errorPropagation.errorProneTypes")}
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</p>
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<div className="flex flex-col gap-1">
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{topTypes.map((t, i) => {
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const maxCount = topTypes[0]?.count ?? 1;
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const pct = (t.count / maxCount) * 100;
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return (
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<div
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key={t.subagent_type}
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className="flex items-center gap-2.5 px-2.5 py-1.5 rounded-lg hover:bg-surface-3/50 transition-colors"
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>
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<span
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className="w-1.5 h-1.5 rounded-full flex-shrink-0"
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style={{ backgroundColor: DEPTH_COLORS[Math.min(i, DEPTH_COLORS.length - 1)] }}
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/>
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<span className="text-xs text-gray-300 truncate flex-1 min-w-0">
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{t.subagent_type}
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</span>
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<div className="w-16 h-1.5 bg-surface-4 rounded-full overflow-hidden flex-shrink-0">
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<div
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className="h-full rounded-full bg-red-400/60"
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style={{ width: `${Math.max(pct, 8)}%` }}
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/>
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</div>
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<span className="text-[11px] font-semibold text-red-300 tabular-nums w-5 text-right flex-shrink-0">
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{t.count}
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</span>
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</div>
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);
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})}
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</div>
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</div>
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)}
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{/* API & session errors */}
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{data.eventErrors && data.eventErrors.length > 0 && (
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<div>
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<p className="text-[10px] font-medium text-gray-500 uppercase tracking-wider mb-2.5">
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{t("errorPropagation.apiSessionErrors")}
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</p>
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<div className="flex flex-col gap-1">
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{data.eventErrors.map((e) => (
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<div
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key={e.summary}
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className="flex items-center gap-2.5 px-2.5 py-2 rounded-lg bg-amber-500/5 border border-amber-500/10 hover:border-amber-500/20 transition-colors"
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>
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<svg
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width="14"
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height="14"
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viewBox="0 0 24 24"
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fill="none"
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stroke="#f59e0b"
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strokeWidth="2"
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strokeLinecap="round"
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strokeLinejoin="round"
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className="flex-shrink-0"
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>
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<path d="M10.29 3.86L1.82 18a2 2 0 0 0 1.71 3h16.94a2 2 0 0 0 1.71-3L13.71 3.86a2 2 0 0 0-3.42 0z" />
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<line x1="12" y1="9" x2="12" y2="13" />
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<line x1="12" y1="17" x2="12.01" y2="17" />
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</svg>
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<span className="text-xs text-gray-300 truncate flex-1 min-w-0" title={e.summary}>
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{e.summary}
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</span>
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<span className="flex-shrink-0 text-[11px] font-semibold text-amber-400 tabular-nums">
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{e.count}x
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</span>
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</div>
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))}
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</div>
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</div>
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)}
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</div>
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);
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}
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