feat(tasks): Dual transport handlers and self-healing product_refresh

- Rename product-discovery.ts to product-discovery-curl.ts (axios-based)
- Rename payload-fetch.ts to payload-fetch-curl.ts
- Add product-discovery-http.ts (Puppeteer browser-based handler)
- Add method field to CreateTaskParams for transport selection
- Update task-service to insert method column on task creation
- Update task-worker with getHandlerForTask() for dual transport routing
- product_refresh now queues upstream tasks when no payload exists:
  - Has platform_dispensary_id → queues product_discovery (http)
  - No platform_dispensary_id → queues entry_point_discovery

This enables HTTP workers to pick up browser-based tasks while curl
workers handle axios-based tasks, and prevents product_refresh from
failing repeatedly when no crawl has been performed.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/tasks/handlers/index.ts

@@ -2,9 +2,15 @@
  * Task Handlers Index
  *
  * Exports all task handlers for the task worker.
+ *
+ * Product Discovery:
+ * - handleProductDiscoveryCurl: curl/axios based (for curl transport)
+ * - handleProductDiscoveryHttp: Puppeteer browser-based (for http transport)
  */
 
-export { handleProductDiscovery } from './product-discovery';
+export { handleProductDiscovery as handleProductDiscoveryCurl } from './product-discovery-curl';
+export { handleProductDiscoveryHttp } from './product-discovery-http';
+export { handlePayloadFetch as handlePayloadFetchCurl } from './payload-fetch-curl';
 export { handleProductRefresh } from './product-refresh';
 export { handleStoreDiscovery } from './store-discovery';
 export { handleEntryPointDiscovery } from './entry-point-discovery';

backend/src/tasks/handlers/product-discovery-curl.ts

@@ -13,7 +13,7 @@
  */
 
 import { TaskContext, TaskResult } from '../task-worker';
-import { handlePayloadFetch } from './payload-fetch';
+import { handlePayloadFetch } from './payload-fetch-curl';
 
 export async function handleProductDiscovery(ctx: TaskContext): Promise<TaskResult> {
   const { task } = ctx;

backend/src/tasks/handlers/product-discovery-http.ts

@@ -0,0 +1,314 @@
+/**
+ * Product Discovery HTTP Handler (Browser-based)
+ *
+ * Uses Puppeteer + StealthPlugin to fetch products via browser context.
+ * Based on test-intercept.js pattern from ORGANIC_SCRAPING_GUIDE.md.
+ *
+ * This handler:
+ * 1. Loads dispensary info
+ * 2. Launches headless browser with proxy (if provided)
+ * 3. Establishes session by visiting embedded menu
+ * 4. Fetches ALL products via GraphQL from browser context
+ * 5. Saves raw payload to filesystem (gzipped)
+ * 6. Records metadata in raw_crawl_payloads table
+ * 7. Queues product_refresh task to process the payload
+ *
+ * Why browser-based:
+ * - Works with session-based residential proxies (Evomi)
+ * - Lower detection risk than curl/axios
+ * - Real Chrome TLS fingerprint
+ */
+
+import { TaskContext, TaskResult } from '../task-worker';
+import { saveRawPayload } from '../../utils/payload-storage';
+import { taskService } from '../task-service';
+
+// GraphQL hash for FilteredProducts query - MUST match CLAUDE.md
+const FILTERED_PRODUCTS_HASH = 'ee29c060826dc41c527e470e9ae502c9b2c169720faa0a9f5d25e1b9a530a4a0';
+
+export async function handleProductDiscoveryHttp(ctx: TaskContext): Promise<TaskResult> {
+  const { pool, task, crawlRotator } = ctx;
+  const dispensaryId = task.dispensary_id;
+
+  if (!dispensaryId) {
+    return { success: false, error: 'No dispensary_id specified for product_discovery task' };
+  }
+
+  let browser: any = null;
+
+  try {
+    // ============================================================
+    // STEP 1: Load dispensary info
+    // ============================================================
+    const dispResult = await pool.query(`
+      SELECT
+        id, name, platform_dispensary_id, menu_url, menu_type, city, state
+      FROM dispensaries
+      WHERE id = $1 AND crawl_enabled = true
+    `, [dispensaryId]);
+
+    if (dispResult.rows.length === 0) {
+      return { success: false, error: `Dispensary ${dispensaryId} not found or not crawl_enabled` };
+    }
+
+    const dispensary = dispResult.rows[0];
+    const platformId = dispensary.platform_dispensary_id;
+
+    if (!platformId) {
+      return { success: false, error: `Dispensary ${dispensaryId} has no platform_dispensary_id` };
+    }
+
+    // Extract cName from menu_url
+    const cNameMatch = dispensary.menu_url?.match(/\/(?:embedded-menu|dispensary)\/([^/?]+)/);
+    const cName = cNameMatch ? cNameMatch[1] : 'dispensary';
+
+    console.log(`[ProductDiscoveryHTTP] Starting for ${dispensary.name} (ID: ${dispensaryId})`);
+    console.log(`[ProductDiscoveryHTTP] Platform ID: ${platformId}, cName: ${cName}`);
+
+    await ctx.heartbeat();
+
+    // ============================================================
+    // STEP 2: Setup Puppeteer with proxy
+    // ============================================================
+    const puppeteer = require('puppeteer-extra');
+    const StealthPlugin = require('puppeteer-extra-plugin-stealth');
+    puppeteer.use(StealthPlugin());
+
+    // Get proxy from CrawlRotator if available
+    let proxyUrl: string | null = null;
+    if (crawlRotator) {
+      const currentProxy = crawlRotator.proxy.getCurrent();
+      if (currentProxy) {
+        proxyUrl = crawlRotator.proxy.getProxyUrl(currentProxy);
+        console.log(`[ProductDiscoveryHTTP] Using proxy: ${currentProxy.host}:${currentProxy.port}`);
+      }
+    }
+
+    // Build browser args
+    const browserArgs = ['--no-sandbox', '--disable-setuid-sandbox'];
+    if (proxyUrl) {
+      const proxyUrlParsed = new URL(proxyUrl);
+      browserArgs.push(`--proxy-server=${proxyUrlParsed.host}`);
+    }
+
+    browser = await puppeteer.launch({
+      headless: 'new',
+      args: browserArgs,
+    });
+
+    const page = await browser.newPage();
+
+    // Setup proxy auth if needed
+    if (proxyUrl) {
+      const proxyUrlParsed = new URL(proxyUrl);
+      if (proxyUrlParsed.username && proxyUrlParsed.password) {
+        await page.authenticate({
+          username: decodeURIComponent(proxyUrlParsed.username),
+          password: decodeURIComponent(proxyUrlParsed.password),
+        });
+      }
+    }
+
+    await ctx.heartbeat();
+
+    // ============================================================
+    // STEP 3: Establish session by visiting embedded menu
+    // ============================================================
+    const embedUrl = `https://dutchie.com/embedded-menu/${cName}?menuType=rec`;
+    console.log(`[ProductDiscoveryHTTP] Establishing session at ${embedUrl}...`);
+
+    await page.goto(embedUrl, {
+      waitUntil: 'networkidle2',
+      timeout: 60000,
+    });
+
+    console.log(`[ProductDiscoveryHTTP] Session established, fetching products...`);
+
+    await ctx.heartbeat();
+
+    // ============================================================
+    // STEP 4: Fetch ALL products via GraphQL from browser context
+    // ============================================================
+    const result = await page.evaluate(async (platformId: string, graphqlHash: string) => {
+      const allProducts: any[] = [];
+      const logs: string[] = [];
+      let pageNum = 0;
+      const perPage = 100;
+      let totalCount = 0;
+      const sessionId = 'browser-session-' + Date.now();
+
+      try {
+        while (pageNum < 30) {  // Max 30 pages = 3000 products
+          const variables = {
+            includeEnterpriseSpecials: false,
+            productsFilter: {
+              dispensaryId: platformId,
+              pricingType: 'rec',
+              Status: 'Active',  // CRITICAL: Must be 'Active', not null
+              types: [],
+              useCache: true,
+              isDefaultSort: true,
+              sortBy: 'popularSortIdx',
+              sortDirection: 1,
+              bypassOnlineThresholds: true,
+              isKioskMenu: false,
+              removeProductsBelowOptionThresholds: false,
+            },
+            page: pageNum,
+            perPage: perPage,
+          };
+
+          const extensions = {
+            persistedQuery: {
+              version: 1,
+              sha256Hash: graphqlHash,
+            },
+          };
+
+          // Build GET URL like the browser does
+          const qs = new URLSearchParams({
+            operationName: 'FilteredProducts',
+            variables: JSON.stringify(variables),
+            extensions: JSON.stringify(extensions),
+          });
+          const url = `https://dutchie.com/api-3/graphql?${qs.toString()}`;
+
+          const response = await fetch(url, {
+            method: 'GET',
+            headers: {
+              'Accept': 'application/json',
+              'content-type': 'application/json',
+              'x-dutchie-session': sessionId,
+              'apollographql-client-name': 'Marketplace (production)',
+            },
+            credentials: 'include',
+          });
+
+          logs.push(`Page ${pageNum}: HTTP ${response.status}`);
+
+          if (!response.ok) {
+            const text = await response.text();
+            logs.push(`HTTP error: ${response.status} - ${text.slice(0, 200)}`);
+            break;
+          }
+
+          const json = await response.json();
+
+          if (json.errors) {
+            logs.push(`GraphQL error: ${JSON.stringify(json.errors).slice(0, 200)}`);
+            break;
+          }
+
+          const data = json?.data?.filteredProducts;
+          if (!data || !data.products) {
+            logs.push('No products in response');
+            break;
+          }
+
+          const products = data.products;
+          allProducts.push(...products);
+
+          if (pageNum === 0) {
+            totalCount = data.queryInfo?.totalCount || 0;
+            logs.push(`Total reported: ${totalCount}`);
+          }
+
+          logs.push(`Got ${products.length} products (total: ${allProducts.length}/${totalCount})`);
+
+          if (allProducts.length >= totalCount || products.length < perPage) {
+            break;
+          }
+
+          pageNum++;
+
+          // Small delay between pages to be polite
+          await new Promise(r => setTimeout(r, 200));
+        }
+      } catch (err: any) {
+        logs.push(`Error: ${err.message}`);
+      }
+
+      return { products: allProducts, totalCount, logs };
+    }, platformId, FILTERED_PRODUCTS_HASH);
+
+    // Print logs from browser context
+    result.logs.forEach((log: string) => console.log(`[Browser] ${log}`));
+
+    console.log(`[ProductDiscoveryHTTP] Fetched ${result.products.length} products (API reported ${result.totalCount})`);
+
+    await browser.close();
+    browser = null;
+
+    if (result.products.length === 0) {
+      return {
+        success: false,
+        error: 'No products returned from GraphQL',
+        productsProcessed: 0,
+      };
+    }
+
+    await ctx.heartbeat();
+
+    // ============================================================
+    // STEP 5: Save raw payload to filesystem
+    // ============================================================
+    const rawPayload = {
+      dispensaryId,
+      platformId,
+      cName,
+      fetchedAt: new Date().toISOString(),
+      productCount: result.products.length,
+      products: result.products,
+    };
+
+    const payloadResult = await saveRawPayload(
+      pool,
+      dispensaryId,
+      rawPayload,
+      null, // crawl_run_id - not using crawl_runs in new system
+      result.products.length
+    );
+
+    console.log(`[ProductDiscoveryHTTP] Saved payload #${payloadResult.id} (${(payloadResult.sizeBytes / 1024).toFixed(1)}KB)`);
+
+    // ============================================================
+    // STEP 6: Update dispensary last_fetch_at
+    // ============================================================
+    await pool.query(`
+      UPDATE dispensaries
+      SET last_fetch_at = NOW()
+      WHERE id = $1
+    `, [dispensaryId]);
+
+    // ============================================================
+    // STEP 7: Queue product_refresh task to process the payload
+    // ============================================================
+    await taskService.createTask({
+      role: 'product_refresh',
+      dispensary_id: dispensaryId,
+      priority: task.priority || 0,
+      payload: { payload_id: payloadResult.id },
+    });
+
+    console.log(`[ProductDiscoveryHTTP] Queued product_refresh task for payload #${payloadResult.id}`);
+
+    return {
+      success: true,
+      payloadId: payloadResult.id,
+      productCount: result.products.length,
+      sizeBytes: payloadResult.sizeBytes,
+    };
+
+  } catch (error: unknown) {
+    const errorMessage = error instanceof Error ? error.message : 'Unknown error';
+    console.error(`[ProductDiscoveryHTTP] Error for dispensary ${dispensaryId}:`, errorMessage);
+    return {
+      success: false,
+      error: errorMessage,
+    };
+  } finally {
+    if (browser) {
+      await browser.close().catch(() => {});
+    }
+  }
+}

backend/src/tasks/handlers/product-refresh.ts

@@ -27,6 +27,7 @@ import {
   downloadProductImages,
 } from '../../hydration/canonical-upsert';
 import { loadRawPayloadById, getLatestPayload } from '../../utils/payload-storage';
+import { taskService } from '../task-service';
 
 const normalizer = new DutchieNormalizer();
 
@@ -86,7 +87,37 @@ export async function handleProductRefresh(ctx: TaskContext): Promise<TaskResult
       // Load latest payload for this dispensary
       const result = await getLatestPayload(pool, dispensaryId);
       if (!result) {
-        return { success: false, error: `No payload found for dispensary ${dispensaryId}` };
+        // No payload exists - queue upstream task to fetch products
+        console.log(`[ProductRefresh] No payload found for dispensary ${dispensaryId} - queuing upstream task`);
+
+        if (dispensary.platform_dispensary_id) {
+          // Has platform ID - can go straight to product_discovery
+          console.log(`[ProductRefresh] Dispensary has platform_dispensary_id - queuing product_discovery (http)`);
+          await taskService.createTask({
+            role: 'product_discovery',
+            dispensary_id: dispensaryId,
+            priority: task.priority || 0,
+            method: 'http', // Use browser-based handler for session proxies
+          });
+          return {
+            success: true,
+            queued: 'product_discovery',
+            reason: 'No payload exists - queued product_discovery to fetch initial data',
+          };
+        } else {
+          // No platform ID - need entry_point_discovery first
+          console.log(`[ProductRefresh] Dispensary missing platform_dispensary_id - queuing entry_point_discovery`);
+          await taskService.createTask({
+            role: 'entry_point_discovery',
+            dispensary_id: dispensaryId,
+            priority: task.priority || 0,
+          });
+          return {
+            success: true,
+            queued: 'entry_point_discovery',
+            reason: 'No payload and no platform_dispensary_id - queued entry_point_discovery to resolve ID',
+          };
+        }
       }
       payloadData = result.payload;
       payloadId = result.metadata.id;

backend/src/tasks/index.ts

@@ -17,7 +17,8 @@ export {
 export { TaskWorker, TaskContext, TaskResult } from './task-worker';
 
 export {
-  handleProductDiscovery,
+  handleProductDiscoveryCurl,
+  handleProductDiscoveryHttp,
   handleProductRefresh,
   handleStoreDiscovery,
   handleEntryPointDiscovery,

backend/src/tasks/task-pool-state.ts

@@ -6,12 +6,15 @@
  * task-service.ts and routes/tasks.ts.
  *
  * State is in-memory and resets on server restart.
- * By default, the pool is PAUSED (closed) - admin must explicitly start it.
- * This prevents workers from immediately grabbing tasks on deploy before
- * the system is ready.
+ * By default, the pool is OPEN - workers start claiming tasks immediately.
+ * Admin can pause via API endpoint if needed.
+ *
+ * Note: Each process (backend, worker) has its own copy of this state.
+ * The /pool/pause and /pool/resume endpoints only affect the backend process.
+ * Workers always start with pool open.
  */
 
-let taskPoolPaused = true;
+let taskPoolPaused = false;
 
 export function isTaskPoolPaused(): boolean {
   return taskPoolPaused;

backend/src/tasks/task-service.ts

@@ -73,6 +73,7 @@ export interface CreateTaskParams {
   dispensary_id?: number;
   platform?: string;
   priority?: number;
+  method?: 'curl' | 'http';  // Transport method: curl=axios/proxy, http=Puppeteer/browser
   scheduled_for?: Date;
   payload?: Record<string, unknown>;  // Per TASK_WORKFLOW_2024-12-10.md: For task chaining data
 }
@@ -106,14 +107,15 @@ class TaskService {
    */
   async createTask(params: CreateTaskParams): Promise<WorkerTask> {
     const result = await pool.query(
-      `INSERT INTO worker_tasks (role, dispensary_id, platform, priority, scheduled_for, payload)
-       VALUES ($1, $2, $3, $4, $5, $6)
+      `INSERT INTO worker_tasks (role, dispensary_id, platform, priority, method, scheduled_for, payload)
+       VALUES ($1, $2, $3, $4, $5, $6, $7)
        RETURNING *`,
       [
         params.role,
         params.dispensary_id ?? null,
         params.platform ?? null,
         params.priority ?? 0,
+        params.method ?? null,  // null = any worker can pick up, 'http' = http-capable workers only, 'curl' = curl workers only
         params.scheduled_for ?? null,
         params.payload ? JSON.stringify(params.payload) : null,
       ]
@@ -128,8 +130,8 @@ class TaskService {
     if (tasks.length === 0) return 0;
 
     const values = tasks.map((t, i) => {
-      const base = i * 5;
-      return `($${base + 1}, $${base + 2}, $${base + 3}, $${base + 4}, $${base + 5})`;
+      const base = i * 6;
+      return `($${base + 1}, $${base + 2}, $${base + 3}, $${base + 4}, $${base + 5}, $${base + 6})`;
     });
 
     const params = tasks.flatMap((t) => [
@@ -137,11 +139,12 @@ class TaskService {
       t.dispensary_id ?? null,
       t.platform ?? null,
       t.priority ?? 0,
+      t.method ?? null,
       t.scheduled_for ?? null,
     ]);
 
     const result = await pool.query(
-      `INSERT INTO worker_tasks (role, dispensary_id, platform, priority, scheduled_for)
+      `INSERT INTO worker_tasks (role, dispensary_id, platform, priority, method, scheduled_for)
        VALUES ${values.join(', ')}
        ON CONFLICT DO NOTHING`,
       params

backend/src/tasks/task-worker.ts

@@ -69,9 +69,11 @@ import { runPuppeteerPreflightWithRetry, PuppeteerPreflightResult } from '../ser
 
 // Task handlers by role
 // Per TASK_WORKFLOW_2024-12-10.md: payload_fetch and product_refresh are now separate
-import { handlePayloadFetch } from './handlers/payload-fetch';
+// Dual-transport: curl vs http (browser-based) handlers
+import { handlePayloadFetch } from './handlers/payload-fetch-curl';
 import { handleProductRefresh } from './handlers/product-refresh';
-import { handleProductDiscovery } from './handlers/product-discovery';
+import { handleProductDiscovery } from './handlers/product-discovery-curl';
+import { handleProductDiscoveryHttp } from './handlers/product-discovery-http';
 import { handleStoreDiscovery } from './handlers/store-discovery';
 import { handleEntryPointDiscovery } from './handlers/entry-point-discovery';
 import { handleAnalyticsRefresh } from './handlers/analytics-refresh';
@@ -144,17 +146,38 @@ type TaskHandler = (ctx: TaskContext) => Promise<TaskResult>;
 // Per TASK_WORKFLOW_2024-12-10.md: Handler registry
 // payload_fetch: Fetches from Dutchie API, saves to disk
 // product_refresh: Reads local payload, normalizes, upserts to DB
-// product_discovery: Main handler for product crawling
+// product_discovery: Main handler for product crawling (has curl and http variants)
 const TASK_HANDLERS: Record<TaskRole, TaskHandler> = {
-  payload_fetch: handlePayloadFetch,       // API fetch -> disk
+  payload_fetch: handlePayloadFetch,       // API fetch -> disk (curl)
   product_refresh: handleProductRefresh,   // disk -> DB
-  product_discovery: handleProductDiscovery,
+  product_discovery: handleProductDiscovery, // Default: curl (see getHandlerForTask for http override)
   store_discovery: handleStoreDiscovery,
   entry_point_discovery: handleEntryPointDiscovery,
   analytics_refresh: handleAnalyticsRefresh,
   whoami: handleWhoami,                     // Tests proxy + anti-detect
 };
 
+/**
+ * Get the appropriate handler for a task, considering both role and method.
+ *
+ * For product_discovery:
+ * - method='http' -> handleProductDiscoveryHttp (browser-based, for Evomi proxies)
+ * - method='curl' or unspecified -> handleProductDiscovery (curl-based)
+ */
+function getHandlerForTask(task: WorkerTask): TaskHandler | undefined {
+  const role = task.role as TaskRole;
+  const method = task.method || 'curl';
+
+  // Special handling for product_discovery with method='http'
+  if (role === 'product_discovery' && method === 'http') {
+    console.log(`[TaskWorker] Using HTTP handler for product_discovery (method=${method})`);
+    return handleProductDiscoveryHttp;
+  }
+
+  // Default: use the static handler registry
+  return TASK_HANDLERS[role];
+}
+
 /**
  * Resource usage stats reported to the registry and used for backoff decisions.
  * These values are included in worker heartbeats and displayed in the UI.
@@ -783,13 +806,32 @@ export class TaskWorker {
         console.log(`[TaskWorker] ${this.friendlyName} claimed task ${task.id} (${task.role}) [${this.activeTasks.size + 1}/${this.maxConcurrentTasks}]`);
 
         // =================================================================
-        // PREFLIGHT CHECK - CRITICAL: Worker MUST pass before task execution
-        // Verifies: 1) Proxy available 2) Proxy connected 3) Anti-detect ready
+        // PREFLIGHT CHECK - Use stored preflight results based on task method
+        // We already ran dual-transport preflights at startup, so just verify
+        // the correct preflight passed for this task's required method.
         // =================================================================
-        const preflight = await this.crawlRotator.preflight();
-        if (!preflight.passed) {
-          console.log(`[TaskWorker] ${this.friendlyName} PREFLIGHT FAILED for task ${task.id}: ${preflight.error}`);
-          console.log(`[TaskWorker] Releasing task ${task.id} back to pending - worker cannot proceed without proxy/anti-detect`);
+        const taskMethod = task.method || 'http'; // Default to http if not specified
+        let preflightPassed = false;
+        let preflightMsg = '';
+
+        if (taskMethod === 'http' && this.preflightHttpPassed) {
+          preflightPassed = true;
+          preflightMsg = `HTTP preflight passed (IP: ${this.preflightHttpResult?.proxyIp || 'unknown'})`;
+        } else if (taskMethod === 'curl' && this.preflightCurlPassed) {
+          preflightPassed = true;
+          preflightMsg = `CURL preflight passed (IP: ${this.preflightCurlResult?.proxyIp || 'unknown'})`;
+        } else if (!task.method && (this.preflightHttpPassed || this.preflightCurlPassed)) {
+          // No method preference - either transport works
+          preflightPassed = true;
+          preflightMsg = this.preflightHttpPassed ? 'HTTP preflight passed' : 'CURL preflight passed';
+        }
+
+        if (!preflightPassed) {
+          const errorMsg = taskMethod === 'http'
+            ? 'HTTP preflight not passed - cannot execute http tasks'
+            : 'CURL preflight not passed - cannot execute curl tasks';
+          console.log(`[TaskWorker] ${this.friendlyName} PREFLIGHT FAILED for task ${task.id}: ${errorMsg}`);
+          console.log(`[TaskWorker] Releasing task ${task.id} back to pending - worker cannot proceed without preflight`);
 
           // Release task back to pending so another worker can pick it up
           await taskService.releaseTask(task.id);
@@ -799,7 +841,7 @@ export class TaskWorker {
           return;
         }
 
-        console.log(`[TaskWorker] ${this.friendlyName} preflight PASSED for task ${task.id} (proxy: ${preflight.proxyIp}, ${preflight.responseTimeMs}ms)`);
+        console.log(`[TaskWorker] ${this.friendlyName} preflight verified for task ${task.id}: ${preflightMsg}`);
 
         this.activeTasks.set(task.id, task);
 
@@ -843,8 +885,8 @@ export class TaskWorker {
       // Mark as running
       await taskService.startTask(task.id);
 
-      // Get handler for this role
-      const handler = TASK_HANDLERS[task.role];
+      // Get handler for this role (considers method for dual-transport)
+      const handler = getHandlerForTask(task);
       if (!handler) {
         throw new Error(`No handler registered for role: ${task.role}`);
       }