Fix boot state sharing across Next.js module boundaries

Use globalThis for all in-memory stores (credentials, models, agents,
tasks) so the instrumentation hook and API route handlers share the
same data. Next.js bundles these as separate chunks with independent
module instances, causing boot-populated state to be invisible to
API routes.

apps/harness/src/lib/agents.ts

@@ -58,7 +58,10 @@ export interface AgentConfig {
   env?: Record<string, string>;  // additional env vars for the agent process
 }
 
-const configs: Map<string, AgentConfig> = new Map();
+// Shared via globalThis to survive Next.js module re-bundling.
+const g = globalThis as unknown as { __harnessAgentConfigs?: Map<string, AgentConfig> };
+g.__harnessAgentConfigs ??= new Map();
+const configs = g.__harnessAgentConfigs;
 
 export function getAllAgentConfigs(): AgentConfig[] {
   return Array.from(configs.values());

apps/harness/src/lib/boot.ts

@@ -7,7 +7,8 @@ import { upsertCuratedModel, getCuratedModels } from "./model-store";
 import { upsertAgentConfig, getAllAgentConfigs, type AgentRuntime } from "./agents";
 import { fetchAllModels } from "./model-providers";
 
-let booted = false;
+const gb = globalThis as unknown as { __harnessBooted?: boolean };
+
 
 // Well-known models with pricing (used as fallback when API discovery returns
 // models without pricing info, and to enable cost tracking from the start).
@@ -179,8 +180,8 @@ async function discoverModelsAndAgents() {
 // ─── BOOT ───────────────────────────────────────────────────
 
 export async function boot() {
-  if (booted) return;
+  if (gb.__harnessBooted) return;
-  booted = true;
+  gb.__harnessBooted = true;
 
   // 1. Load credentials from mounted secrets (files take priority)
   loadClaudeCredentials();

apps/harness/src/lib/credentials.ts

@@ -13,8 +13,10 @@ export interface Credential {
   baseUrl?: string; // for self-hosted GitLab or custom endpoints
 }
 
-// In-memory store. Will be replaced with encrypted persistent storage.
+// In-memory store shared via globalThis to survive Next.js module re-bundling.
-const credentials: Map<string, Credential> = new Map();
+const g = globalThis as unknown as { __harnessCredentials?: Map<string, Credential> };
+g.__harnessCredentials ??= new Map();
+const credentials = g.__harnessCredentials;
 
 export function getAllCredentials(): Credential[] {
   return Array.from(credentials.values()).map(c => ({

apps/harness/src/lib/model-store.ts

@@ -32,9 +32,12 @@ export interface ModelUsageSummary {
   totalDurationMs: number;
 }
 
-// In-memory stores
+// In-memory stores shared via globalThis to survive Next.js module re-bundling.
-const curatedModels: Map<string, CuratedModel> = new Map();
+const g = globalThis as unknown as { __harnessCuratedModels?: Map<string, CuratedModel>; __harnessUsageLog?: ModelUsageEntry[] };
-const usageLog: ModelUsageEntry[] = [];
+g.__harnessCuratedModels ??= new Map();
+g.__harnessUsageLog ??= [];
+const curatedModels = g.__harnessCuratedModels;
+const usageLog = g.__harnessUsageLog;
 
 // ─── CURATED MODELS ─────────────────────────────────────────
 

apps/harness/src/lib/store.ts

@@ -1,8 +1,9 @@
 import { Task } from "./types";
 
-// In-memory task store. Will be replaced with persistent storage (CloudNativePG)
+// In-memory task store shared via globalThis to survive Next.js module re-bundling.
-// once the orchestrator loop is wired up.
+const g = globalThis as unknown as { __harnessTasks?: Map<string, Task> };
-const tasks: Map<string, Task> = new Map();
+g.__harnessTasks ??= new Map();
+const tasks = g.__harnessTasks;
 
 export function getAllTasks(): Task[] {
   return Array.from(tasks.values());