diff --git a/.npmrc b/.npmrc
index 537f81f..702c607 100644
--- a/.npmrc
+++ b/.npmrc
@@ -1 +1,3 @@
-ignore-scripts=true
\ No newline at end of file
+ignore-scripts=true
+save-exact=true
+fund=false
\ No newline at end of file
diff --git a/README.md b/README.md
index 773fbb5..d2f5b7c 100644
--- a/README.md
+++ b/README.md
@@ -288,6 +288,7 @@ Configuration on the client side involves passing an object on startup, which ca
 - `verbose` - optional, if `true` then a summary of every HTTP response is logged.
 - `loginMechanism` - either `Default` or `Redirected`. See [SAS Logon](#sas-logon) section.
 - `useComputeApi` - Only relevant when the serverType is `SASVIYA`. If `true` the [Compute API](#using-the-compute-api) is used. If `false` the [JES API](#using-the-jes-api) is used. If `null` or `undefined` the [Web](#using-jes-web-app) approach is used.
+- `runAsTask` - Only relevant for serverType `SASVIYA` and useComputeApi `null`.  Will add the `_EXECUTIONTASKS=true` URL param and thus execute jobs as Compute Tasks.
 - `contextName` - Compute context on which the requests will be called. If missing or not provided, defaults to `Job Execution Compute context`.
 - `requestHistoryLimit` - Request history limit. Increasing this limit may affect browser performance, especially with debug (logs) enabled. Default is 10.
 
diff --git a/cypress.config.js b/cypress.config.js
index 62ca1ff..3fb5356 100644
--- a/cypress.config.js
+++ b/cypress.config.js
@@ -13,6 +13,6 @@ module.exports = defineConfig({
     username: '',
     password: '',
     screenshotOnRunFailure: false,
-    testingFinishTimeout: 600000
+    testingFinishTimeout: 300000
   }
 })
diff --git a/cypress/integration/sasjs.tests.ts b/cypress/integration/sasjs.tests.ts
index 07d82a3..8cc056a 100644
--- a/cypress/integration/sasjs.tests.ts
+++ b/cypress/integration/sasjs.tests.ts
@@ -12,6 +12,58 @@ context('sasjs-tests', function () {
     cy.visit(sasjsTestsUrl)
   })
 
+  function waitForTestsToFinish(timeout: number) {
+    const deadline = Date.now() + timeout
+    function check() {
+      cy.get('tests-view', { log: false }).then(($view) => {
+        const shadow = ($view[0] as HTMLElement).shadowRoot
+        const stillRunning = !!shadow?.querySelector('#run-btn:disabled')
+        if (!stillRunning) return
+        if (Date.now() >= deadline) {
+          cy.log('Timed out waiting for tests to finish; reporting status')
+          return
+        }
+        cy.wait(2000, { log: false })
+        check()
+      })
+    }
+    check()
+  }
+
+  function assertNoFailedTests() {
+    cy.get('test-card').then(($cards) => {
+      const failed: string[] = []
+      const stuck: string[] = []
+      const pending: string[] = []
+      $cards.each((_, card) => {
+        const shadow = (card as HTMLElement).shadowRoot
+        if (!shadow) return
+        const icon = shadow.querySelector('.status-icon')
+        const title =
+          shadow.querySelector('.header h3')?.textContent?.trim() ?? '(unknown)'
+        if (icon?.classList.contains('failed')) {
+          const error =
+            shadow.querySelector('.error pre')?.textContent?.trim() ?? ''
+          failed.push(error ? `- ${title}\n    ${error}` : `- ${title}`)
+        } else if (icon?.classList.contains('running')) {
+          stuck.push(`- ${title}`)
+        } else if (icon?.classList.contains('pending')) {
+          pending.push(`- ${title}`)
+        }
+      })
+      const parts: string[] = []
+      if (failed.length)
+        parts.push(`${failed.length} failed:\n${failed.join('\n')}`)
+      if (stuck.length)
+        parts.push(`${stuck.length} stuck (running):\n${stuck.join('\n')}`)
+      if (pending.length)
+        parts.push(
+          `${pending.length} did not start (pending):\n${pending.join('\n')}`
+        )
+      expect(parts, parts.join('\n\n')).to.be.empty
+    })
+  }
+
   function loginIfNeeded() {
     cy.get('login-form, tests-view', { timeout: 30000 }).should('exist')
 
@@ -42,14 +94,9 @@ context('sasjs-tests', function () {
 
     cy.get('tests-view').shadow().find('#run-btn').should('be.visible').click()
 
-    cy.get('tests-view')
-      .shadow()
-      .find('#run-btn:disabled', {
-        timeout: testingFinishTimeout
-      })
-      .should('not.exist')
+    waitForTestsToFinish(testingFinishTimeout)
 
-    cy.get('test-card').shadow().find('.status-icon.failed').should('not.exist')
+    assertNoFailedTests()
   })
 
   it('Should have all tests successful with debug on', () => {
@@ -63,13 +110,8 @@ context('sasjs-tests', function () {
 
     cy.get('tests-view').shadow().find('#run-btn').should('be.visible').click()
 
-    cy.get('tests-view')
-      .shadow()
-      .find('#run-btn:disabled', {
-        timeout: testingFinishTimeout
-      })
-      .should('not.exist')
+    waitForTestsToFinish(testingFinishTimeout)
 
-    cy.get('test-card').shadow().find('.status-icon.failed').should('not.exist')
+    assertNoFailedTests()
   })
 })
diff --git a/sasjs-tests/src/components/TestSuite.ts b/sasjs-tests/src/components/TestSuite.ts
index 39843a3..d9430c0 100644
--- a/sasjs-tests/src/components/TestSuite.ts
+++ b/sasjs-tests/src/components/TestSuite.ts
@@ -66,10 +66,11 @@ export class TestSuiteElement extends HTMLElement {
     const passed = completedTests.filter((t) => t.status === 'passed').length
     const failed = completedTests.filter((t) => t.status === 'failed').length
     const running = completedTests.filter((t) => t.status === 'running').length
+    const pending = completedTests.filter((t) => t.status === 'pending').length
 
     const statsEl = this.shadow.querySelector('.stats')
     if (statsEl) {
-      statsEl.textContent = `Passed: ${passed} | Failed: ${failed} | Running: ${running}`
+      statsEl.textContent = `Passed: ${passed} | Failed: ${failed} | Running: ${running} | Pending: ${pending}`
     }
   }
 
@@ -80,11 +81,12 @@ export class TestSuiteElement extends HTMLElement {
     const passed = completedTests.filter((t) => t.status === 'passed').length
     const failed = completedTests.filter((t) => t.status === 'failed').length
     const running = completedTests.filter((t) => t.status === 'running').length
+    const pending = completedTests.filter((t) => t.status === 'pending').length
 
     this.shadow.innerHTML = `
       <div class="header">
         <h2>${name}</h2>
-        <div class="stats">Passed: ${passed} | Failed: ${failed} | Running: ${running}</div>
+        <div class="stats">Passed: ${passed} | Failed: ${failed} | Running: ${running} | Pending: ${pending}</div>
       </div>
       <div class="tests" id="tests-container"></div>
     `
diff --git a/sasjs-tests/src/core/TestRunner.ts b/sasjs-tests/src/core/TestRunner.ts
index 1fcc583..e634198 100644
--- a/sasjs-tests/src/core/TestRunner.ts
+++ b/sasjs-tests/src/core/TestRunner.ts
@@ -30,12 +30,14 @@ export class TestRunner {
     ) => void
   ): Promise<CompletedTestSuite[]> {
     this.isRunning = true
-    this.completedTestSuites = []
+    this.completedTestSuites = this.testSuites.map((suite) => ({
+      name: suite.name,
+      completedTests: []
+    }))
 
-    for (let i = 0; i < this.testSuites.length; i++) {
-      const suite = this.testSuites[i]
-      await this.runTestSuite(suite, i, onUpdate)
-    }
+    await Promise.allSettled(
+      this.testSuites.map((suite, i) => this.runTestSuite(suite, i, onUpdate))
+    )
 
     this.isRunning = false
     return this.completedTestSuites
@@ -49,7 +51,23 @@ export class TestRunner {
       currentIndex: number
     ) => void
   ): Promise<CompletedTestSuite> {
-    const completedTests: CompletedTest[] = []
+    // Seed all tests as pending so every card renders before any run starts.
+    const completedTests: CompletedTest[] = suite.tests.map((test) => ({
+      test,
+      result: false,
+      error: null,
+      executionTime: 0,
+      status: 'pending'
+    }))
+
+    if (onUpdate) {
+      this.completedTestSuites[suiteIndex] = {
+        name: suite.name,
+        completedTests: [...completedTests]
+      }
+      onUpdate([...this.completedTestSuites], suiteIndex * 1000)
+    }
+
     let context: unknown
 
     // Run beforeAll if exists
@@ -62,15 +80,14 @@ export class TestRunner {
       const test = suite.tests[i]
       const currentIndex = suiteIndex * 1000 + i
 
-      // Set status to running
-      const runningTest: CompletedTest = {
+      // Flip pending → running
+      completedTests[i] = {
         test,
         result: false,
         error: null,
         executionTime: 0,
         status: 'running'
       }
-      completedTests.push(runningTest)
 
       // Notify update
       if (onUpdate) {
diff --git a/sasjs-tests/src/main.ts b/sasjs-tests/src/main.ts
index 4dd8f50..95781c2 100644
--- a/sasjs-tests/src/main.ts
+++ b/sasjs-tests/src/main.ts
@@ -23,6 +23,7 @@ import { fileUploadTests } from './testSuites/FileUpload'
 import { computeTests } from './testSuites/Compute'
 import { sasjsRequestTests } from './testSuites/SasjsRequests'
 import { specialCaseTests } from './testSuites/SpecialCases'
+import { executionTasksTests } from './testSuites/executionTasks'
 
 async function init() {
   const appContainer = document.getElementById('app')
@@ -104,8 +105,9 @@ function showTests(
     fileUploadTests(adapter)
   ]
 
-  // Add compute tests for SASVIYA only
+  // Add tests for SASVIYA only
   if (adapter.getSasjsConfig().serverType === 'SASVIYA') {
+    testSuites.push(executionTasksTests(adapter))
     testSuites.push(computeTests(adapter, appLoc))
   }
 
diff --git a/sasjs-tests/src/testSuites/executionTasks.ts b/sasjs-tests/src/testSuites/executionTasks.ts
new file mode 100644
index 0000000..1ab689d
--- /dev/null
+++ b/sasjs-tests/src/testSuites/executionTasks.ts
@@ -0,0 +1,126 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import SASjs from '@sasjs/adapter'
+import type { TestSuite } from '../types'
+
+const tableData: any = { table1: [{ col1: 'first col value' }] }
+const fileData: any = { table1: [{ col1: 'value with ; semicolon' }] }
+const multiTableData: any = {
+  table1: [{ col1: 'first col value' }],
+  table2: [{ col2: 'second table value' }]
+}
+const multiFileData: any = {
+  table1: [{ col1: 'value with ; semicolon' }],
+  table2: [{ col2: 'another; value' }]
+}
+
+const taskConfig: any = { useComputeApi: null, runAsTask: true }
+const noTaskConfig: any = { useComputeApi: null, runAsTask: false }
+
+export const executionTasksTests = (adapter: SASjs): TestSuite => ({
+  name: 'runAsTask behaviour',
+  tests: [
+    {
+      title: 'no inputs (runAsTask=false)',
+      description: 'no payload, runAsTask explicitly disabled',
+      test: () =>
+        adapter
+          .request('services/common/sendArr', null, noTaskConfig)
+          .then((res: any) => ({ ok: true, res }))
+          .catch((e: any) => ({ ok: false, error: e })),
+      assertion: (res: any) => res?.ok === true
+    },
+    {
+      title: 'no inputs (runAsTask=true)',
+      description: 'no payload, runAsTask=true via config',
+      test: () =>
+        adapter
+          .request('services/common/sendArr', null, taskConfig)
+          .then((res: any) => ({ ok: true, res }))
+          .catch((e: any) => ({ ok: false, error: e })),
+      assertion: (res: any) => res?.ok === true
+    },
+    {
+      title: 'one input table (runAsTask=false)',
+      description: 'single table payload, runAsTask explicitly disabled',
+      test: () =>
+        adapter
+          .request('services/common/sendArr', tableData, noTaskConfig)
+          .then((res: any) => ({ ok: true, res }))
+          .catch((e: any) => ({ ok: false, error: e })),
+      assertion: (res: any) => res?.ok === true
+    },
+    {
+      title: 'one input table (runAsTask=true)',
+      description: 'single table payload, runAsTask=true via config',
+      test: () =>
+        adapter
+          .request('services/common/sendArr', tableData, taskConfig)
+          .then((res: any) => ({ ok: true, res }))
+          .catch((e: any) => ({ ok: false, error: e })),
+      assertion: (res: any) => res?.ok === true
+    },
+    {
+      title: 'multiple input tables (runAsTask=false)',
+      description: 'multi-table payload, runAsTask explicitly disabled',
+      test: () =>
+        adapter
+          .request('services/common/sendArr', multiTableData, noTaskConfig)
+          .then((res: any) => ({ ok: true, res }))
+          .catch((e: any) => ({ ok: false, error: e })),
+      assertion: (res: any) => res?.ok === true
+    },
+    {
+      title: 'multiple input tables (runAsTask=true)',
+      description: 'multi-table payload, runAsTask=true via config',
+      test: () =>
+        adapter
+          .request('services/common/sendArr', multiTableData, taskConfig)
+          .then((res: any) => ({ ok: true, res }))
+          .catch((e: any) => ({ ok: false, error: e })),
+      assertion: (res: any) => res?.ok === true
+    },
+    {
+      title: 'semicolon payload, single table, blob path (runAsTask=false)',
+      description: 'semicolon payload routes through blob path, runAsTask off',
+      test: () =>
+        adapter
+          .request('services/common/sendArr', fileData, noTaskConfig)
+          .then((res: any) => ({ ok: true, res }))
+          .catch((e: any) => ({ ok: false, error: e })),
+      assertion: (res: any) => res?.ok === true
+    },
+    {
+      title: 'semicolon payload, single table, blob path (runAsTask=true)',
+      description:
+        'semicolon payload (single table) routes through blob path, runAsTask=true',
+      test: () =>
+        adapter
+          .request('services/common/sendArr', fileData, taskConfig)
+          .then((res: any) => ({ ok: true, res }))
+          .catch((e: any) => ({ ok: false, error: e })),
+      assertion: (res: any) => res?.ok === true
+    },
+    {
+      title: 'semicolon payload, multi-table, blob path (runAsTask=false)',
+      description:
+        'semicolon payload (multi-table) routes through blob path, runAsTask off',
+      test: () =>
+        adapter
+          .request('services/common/sendArr', multiFileData, noTaskConfig)
+          .then((res: any) => ({ ok: true, res }))
+          .catch((e: any) => ({ ok: false, error: e })),
+      assertion: (res: any) => res?.ok === true
+    },
+    {
+      title: 'semicolon payload, multi-table, blob path (runAsTask=true)',
+      description:
+        'semicolon payload (multi-table) routes through blob path, runAsTask=true',
+      test: () =>
+        adapter
+          .request('services/common/sendArr', multiFileData, taskConfig)
+          .then((res: any) => ({ ok: true, res }))
+          .catch((e: any) => ({ ok: false, error: e })),
+      assertion: (res: any) => res?.ok === true
+    }
+  ]
+})
diff --git a/src/file/generateTableUploadForm.ts b/src/file/generateTableUploadForm.ts
index d7a13ef..ec33272 100644
--- a/src/file/generateTableUploadForm.ts
+++ b/src/file/generateTableUploadForm.ts
@@ -11,6 +11,13 @@ export const generateTableUploadForm = (
   let tableCounter = 0
 
   for (const tableName in data) {
+    if (
+      isFormatsTable(tableName) &&
+      Object.keys(data).includes(tableName.replace(/^\$/, ''))
+    ) {
+      continue
+    }
+
     tableCounter++
 
     // Formats table should not be sent as part of 'sasjs_tables'
diff --git a/src/file/spec/generateTableUploadForm.spec.ts b/src/file/spec/generateTableUploadForm.spec.ts
new file mode 100644
index 0000000..ebb994a
--- /dev/null
+++ b/src/file/spec/generateTableUploadForm.spec.ts
@@ -0,0 +1,71 @@
+import { generateTableUploadForm } from '../generateTableUploadForm'
+import { convertToCSV } from '../../utils/convertToCsv'
+import NodeFormData from 'form-data'
+
+describe('generateTableUploadForm', () => {
+  it('should skip formats table and emit single sasjs1data for paired data + $data', () => {
+    const tableName = 'jsdata'
+    const data: { [key: string]: any } = {
+      [tableName]: [
+        { var1: 'string', var2: 232 },
+        { var1: 'string', var2: 233 }
+      ],
+      [`$${tableName}`]: { formats: { var1: '$char12.', var2: 'best.' } }
+    }
+    const expectedCsv = convertToCSV(data, tableName)
+
+    const formData = new NodeFormData()
+    const { requestParams } = generateTableUploadForm(formData, data)
+
+    expect(requestParams.sasjs_tables).toBe(tableName)
+    expect(requestParams.sasjs1data).toBe(expectedCsv)
+    expect(requestParams.sasjs2data).toBeUndefined()
+  })
+
+  it('should number sequentially across multiple tables w/ paired formats', () => {
+    const data: { [key: string]: any } = {
+      tableA: [{ a: 1 }],
+      $tableA: { formats: { a: 'best.' } },
+      tableB: [{ b: 'x' }],
+      $tableB: { formats: { b: '$char1.' } }
+    }
+    const expectedCsvA = convertToCSV(data, 'tableA')
+    const expectedCsvB = convertToCSV(data, 'tableB')
+
+    const formData = new NodeFormData()
+    const { requestParams } = generateTableUploadForm(formData, data)
+
+    expect(requestParams.sasjs_tables).toBe('tableA tableB')
+    expect(requestParams.sasjs1data).toBe(expectedCsvA)
+    expect(requestParams.sasjs2data).toBe(expectedCsvB)
+    expect(requestParams.sasjs3data).toBeUndefined()
+  })
+
+  it('should throw if string value exceeds 32765 chars', () => {
+    const formData = new NodeFormData()
+    const data = { testTable: [{ var1: 'z'.repeat(32766) }] }
+
+    expect(() => generateTableUploadForm(formData, data)).toThrow(
+      new Error(
+        'The max length of a string value in SASjs is 32765 characters.'
+      )
+    )
+  })
+
+  it('should append chunks to formData when csv exceeds 16k', () => {
+    const tableName = 'big'
+    const data = { [tableName]: [{ var1: 'z'.repeat(16001) }] }
+
+    const formData = new NodeFormData()
+    const appendSpy = jest.spyOn(formData, 'append')
+
+    const { requestParams } = generateTableUploadForm(formData, data)
+
+    expect(requestParams.sasjs_tables).toBe(tableName)
+    expect(requestParams.sasjs1data).toBeUndefined()
+    expect(appendSpy).toHaveBeenCalled()
+    expect(appendSpy.mock.calls.every(([key]) => key === 'sasjs1data')).toBe(
+      true
+    )
+  })
+})
diff --git a/src/job-execution/JobExecutor.ts b/src/job-execution/JobExecutor.ts
index f60ddfa..955611c 100644
--- a/src/job-execution/JobExecutor.ts
+++ b/src/job-execution/JobExecutor.ts
@@ -55,7 +55,6 @@ export abstract class BaseJobExecutor implements JobExecutor {
     if (config.debug) {
       requestParams['_omittextlog'] = 'false'
       requestParams['_omitSessionResults'] = 'false'
-
       requestParams['_debug'] = 131
     }
 
diff --git a/src/job-execution/WebJobExecutor.ts b/src/job-execution/WebJobExecutor.ts
index a9c980d..545e8a4 100644
--- a/src/job-execution/WebJobExecutor.ts
+++ b/src/job-execution/WebJobExecutor.ts
@@ -16,9 +16,11 @@ import { SASViyaApiClient } from '../SASViyaApiClient'
 import {
   isRelativePath,
   parseSasViyaDebugResponse,
+  parseSasViyaLogDebugResponse,
   appendExtraResponseAttributes,
   parseWeboutResponse,
-  getFormData
+  getFormData,
+  isNode
 } from '../utils'
 import { BaseJobExecutor } from './JobExecutor'
 
@@ -101,6 +103,10 @@ export class WebJobExecutor extends BaseJobExecutor {
       apiUrl += config.contextName?.trim()
         ? `&_contextname=${encodeURIComponent(config.contextName)}`
         : ''
+
+      if (config.runAsTask === true) {
+        apiUrl += '&_executionTasks=true'
+      }
     }
 
     let requestParams = {
@@ -113,6 +119,26 @@ export class WebJobExecutor extends BaseJobExecutor {
      */
     let formData = getFormData()
 
+    // FIXME(viya - SAS Track CS0409737): remove when Viya stops rejecting empty multipart on
+    // _executionTasks=true. Dummy file keeps the body non-empty
+    const hasExecutionTasksFlag = config.runAsTask === true
+
+    // Move debug params to URL for viya; viya seems to honor them more
+    // reliably in the query string than the multipart body.
+    if (
+      hasExecutionTasksFlag &&
+      config.debug &&
+      config.serverType === ServerType.SasViya
+    ) {
+      const debugKeys = ['_debug', '_omitSessionResults']
+      debugKeys.forEach((key) => {
+        if (requestParams[key] !== undefined) {
+          apiUrl += `&${key}=${encodeURIComponent(requestParams[key])}`
+          delete requestParams[key]
+        }
+      })
+    }
+
     if (data) {
       const stringifiedData = JSON.stringify(data)
       if (
@@ -133,10 +159,21 @@ export class WebJobExecutor extends BaseJobExecutor {
             generateTableUploadForm(formData, data)
           formData = newFormData
           requestParams = { ...requestParams, ...params }
+
+          if (
+            config.serverType === ServerType.SasViya &&
+            hasExecutionTasksFlag
+          ) {
+            addDummyFile(formData)
+          }
         } catch (e: any) {
           return Promise.reject(new ErrorResponse(e?.message, e))
         }
       }
+    } else {
+      if (config.serverType === ServerType.SasViya && hasExecutionTasksFlag) {
+        addDummyFile(formData)
+      }
     }
 
     for (const key in requestParams) {
@@ -168,11 +205,14 @@ export class WebJobExecutor extends BaseJobExecutor {
           if (config.debug) {
             switch (this.serverType) {
               case ServerType.SasViya:
-                jsonResponse = await parseSasViyaDebugResponse(
-                  res.result,
-                  this.requestClient,
-                  this.serverUrl
-                )
+                jsonResponse =
+                  config.useComputeApi === null && config.runAsTask === true
+                    ? await parseSasViyaLogDebugResponse(res.result)
+                    : await parseSasViyaDebugResponse(
+                        res.result,
+                        this.requestClient,
+                        this.serverUrl
+                      )
                 break
               case ServerType.Sas9:
                 jsonResponse =
@@ -231,6 +271,23 @@ export class WebJobExecutor extends BaseJobExecutor {
     return requestPromise
   }
 
+  protected getRequestParams(config: any): any {
+    const requestParams = super.getRequestParams(config)
+
+    // FIXME(viya - possible issue with default debug flags)
+    // runAsTask on Viya: use _debug=128 (not 131) and omit _omittextlog
+    if (
+      config.debug &&
+      config.serverType === ServerType.SasViya &&
+      config.runAsTask === true
+    ) {
+      requestParams['_debug'] = 128
+      delete requestParams['_omittextlog']
+    }
+
+    return requestParams
+  }
+
   private async getJobUri(sasJob: string) {
     if (!this.sasViyaApiClient) return ''
     let uri = ''
@@ -263,3 +320,18 @@ export class WebJobExecutor extends BaseJobExecutor {
     return uri
   }
 }
+
+function addDummyFile(formData: NodeFormData | FormData) {
+  if (isNode()) {
+    ;(formData as NodeFormData).append('_sasjs_noop', '', {
+      filename: '_sasjs_noop.txt',
+      contentType: 'text/plain'
+    })
+  } else {
+    ;(formData as FormData).append(
+      '_sasjs_noop',
+      new Blob([''], { type: 'text/plain' }),
+      '_sasjs_noop.txt'
+    )
+  }
+}
diff --git a/src/job-execution/spec/executionTasks.spec.ts b/src/job-execution/spec/executionTasks.spec.ts
new file mode 100644
index 0000000..3851700
--- /dev/null
+++ b/src/job-execution/spec/executionTasks.spec.ts
@@ -0,0 +1,146 @@
+import NodeFormData from 'form-data'
+import { ServerType } from '@sasjs/utils/types'
+import { WebJobExecutor } from '../WebJobExecutor'
+import { RequestClient } from '../../request/RequestClient'
+import { SASViyaApiClient } from '../../SASViyaApiClient'
+
+describe('WebJobExecutor runAsTask behaviour', () => {
+  const serverUrl = 'https://sample.server.com'
+  const jobsPath = '/SASJobExecution'
+
+  const makeExecutor = (serverType: ServerType = ServerType.SasViya) => {
+    const requestClient = new RequestClient(serverUrl)
+    const sasViyaApiClient = {
+      getJobsInFolder: async () => []
+    } as unknown as SASViyaApiClient
+    const executor = new WebJobExecutor(
+      serverUrl,
+      serverType,
+      jobsPath,
+      requestClient,
+      sasViyaApiClient
+    )
+    const postSpy = jest
+      .spyOn(requestClient, 'post')
+      .mockResolvedValue({ result: { table1: [] }, etag: '' } as any)
+    jest.spyOn(requestClient, 'appendRequest').mockImplementation()
+    return { executor, postSpy }
+  }
+
+  const baseConfig = {
+    serverUrl,
+    serverType: ServerType.SasViya,
+    appLoc: '/Public/app',
+    useComputeApi: false,
+    debug: false
+  }
+
+  it('sends table data in body (runAsTask=false)', async () => {
+    const { executor, postSpy } = makeExecutor()
+
+    await executor.execute(
+      'services/common/sendArr',
+      { table1: [{ col1: 'v' }] },
+      { ...baseConfig, runAsTask: false }
+    )
+
+    const [apiUrl, body, , contentType] = postSpy.mock.calls[0]
+    expect(apiUrl).not.toContain('_executionTasks=true')
+    expect(body).toBeInstanceOf(NodeFormData)
+    expect(contentType).toMatch(/^multipart\/form-data/)
+  })
+
+  it('uploads as file when payload has semicolons (runAsTask=false)', async () => {
+    const { executor, postSpy } = makeExecutor()
+
+    await executor.execute(
+      'services/common/sendArr',
+      { table1: [{ col1: 'has; semicolon' }] },
+      { ...baseConfig, runAsTask: false }
+    )
+
+    const [apiUrl, body, , contentType] = postSpy.mock.calls[0]
+    expect(apiUrl).not.toContain('_executionTasks=')
+    expect(body).toBeInstanceOf(NodeFormData)
+    expect(contentType).toMatch(/^multipart\/form-data/)
+  })
+
+  it('appends &_executionTasks=true to URL when runAsTask=true and no data', async () => {
+    const { executor, postSpy } = makeExecutor()
+
+    await executor.execute('services/common/sendArr', null, {
+      ...baseConfig,
+      runAsTask: true
+    })
+
+    const [apiUrl] = postSpy.mock.calls[0]
+    expect(apiUrl).toContain('&_executionTasks=true')
+  })
+
+  it('appends &_executionTasks=true and sends table data when runAsTask=true with one input table', async () => {
+    const { executor, postSpy } = makeExecutor()
+
+    await executor.execute(
+      'services/common/sendArr',
+      { table1: [{ col1: 'v' }] },
+      { ...baseConfig, runAsTask: true }
+    )
+
+    const [apiUrl, body, , contentType] = postSpy.mock.calls[0]
+    expect(apiUrl).toContain('&_executionTasks=true')
+    expect(body).toBeInstanceOf(NodeFormData)
+    expect(contentType).toMatch(/^multipart\/form-data/)
+    const dump = (body as NodeFormData).getBuffer().toString()
+    expect(dump).toContain('name="sasjs_tables"')
+    expect(dump).toContain('name="sasjs1data"')
+  })
+
+  it('appends &_executionTasks=true to URL when runAsTask=true with multiple input tables', async () => {
+    const { executor, postSpy } = makeExecutor()
+
+    await executor.execute(
+      'services/common/sendArr',
+      { table1: [{ col1: 'v' }], table2: [{ col2: 'w' }] },
+      { ...baseConfig, runAsTask: true }
+    )
+
+    const [apiUrl, body, , contentType] = postSpy.mock.calls[0]
+    expect(apiUrl).toContain('&_executionTasks=true')
+    expect(body).toBeInstanceOf(NodeFormData)
+    expect(contentType).toMatch(/^multipart\/form-data/)
+    const dump = (body as NodeFormData).getBuffer().toString()
+    expect(dump).toContain('name="sasjs_tables"')
+    expect(dump).toMatch(/table1\s+table2/)
+  })
+
+  it('uploads as file when runAsTask=true and payload has semicolons', async () => {
+    const { executor, postSpy } = makeExecutor()
+
+    await executor.execute(
+      'services/common/sendArr',
+      { table1: [{ col1: 'has; semicolon' }] },
+      { ...baseConfig, runAsTask: true }
+    )
+
+    const [apiUrl, body, , contentType] = postSpy.mock.calls[0]
+    expect(apiUrl).toContain('&_executionTasks=true')
+    expect(body).toBeInstanceOf(NodeFormData)
+    expect(contentType).toMatch(/^multipart\/form-data/)
+    const dump = (body as NodeFormData).getBuffer().toString()
+    expect(dump).toContain('filename="table1.csv"')
+    expect(dump).toContain('Content-Type: application/csv')
+  })
+
+  it('does NOT append _executionTasks=true to URL when runAsTask=false', async () => {
+    const { executor, postSpy } = makeExecutor()
+
+    await executor.execute(
+      'services/common/sendArr',
+      { table1: [{ col1: 'v' }] },
+      { ...baseConfig, runAsTask: false }
+    )
+
+    const [apiUrl] = postSpy.mock.calls[0]
+    expect(apiUrl).not.toContain('_executionTasks=true')
+  })
+})
diff --git a/src/types/SASjsConfig.ts b/src/types/SASjsConfig.ts
index 92a0198..f1fafb9 100644
--- a/src/types/SASjsConfig.ts
+++ b/src/types/SASjsConfig.ts
@@ -79,6 +79,14 @@ export class SASjsConfig {
    * may affect browser performance, especially with debug (logs) enabled.
    */
   requestHistoryLimit?: number = 10
+  /**
+   * Optional setting. When `true`, the request runs as a Viya execution task —
+   * appends `_executionTasks=true` to the request URL. Only applies to the Viya
+   * web jobs path, i.e. when `serverType === SASVIYA` AND
+   * `useComputeApi` is `null`/`undefined`. Has no effect when `useComputeApi`
+   * is explicitly set to `true` or `false`.
+   */
+  runAsTask?: boolean = false
 }
 
 export enum LoginMechanism {
diff --git a/src/utils/index.ts b/src/utils/index.ts
index 2a2b405..ac11428 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -15,6 +15,7 @@ export * from './parseGeneratedCode'
 export * from './parseSasViyaLog'
 export * from './parseSourceCode'
 export * from './parseViyaDebugResponse'
+export * from './parseViyaLogDebugResponse'
 export * from './parseWeboutResponse'
 export * from './serialize'
 export * from './splitChunks'
diff --git a/src/utils/parseViyaLogDebugResponse.ts b/src/utils/parseViyaLogDebugResponse.ts
new file mode 100644
index 0000000..9060c9c
--- /dev/null
+++ b/src/utils/parseViyaLogDebugResponse.ts
@@ -0,0 +1,32 @@
+import { getValidJson } from './getValidJson'
+import { parseWeboutResponse } from './parseWeboutResponse'
+
+/**
+ * When querying a Viya job using the Web approach with _DEBUG=128 (used when
+ * runAsTask is true), the webout JSON is inlined into the response via:
+ *   var blob = new Blob([`{...}`], {type: 'application/json'});
+ * On abort/error paths the same shape is used but with text/plain and
+ * weboutBEGIN/END markers around the JSON:
+ *   var blob = new Blob([`>>weboutBEGIN<<\n{...}\n>>weboutEND<<\n`], {type: 'text/plain'});
+ * No follow-up request is needed — extract and parse the JSON directly.
+ */
+export const parseSasViyaLogDebugResponse = async (response: any) => {
+  // If upstream already parsed the response as JSON (object), pass through.
+  if (typeof response !== 'string') {
+    return response
+  }
+
+  const blobMatch = response.match(
+    /new Blob\(\[`([\s\S]*?)`\],\s*\{type:\s*'(?:application\/json|text\/plain)'\}\)/
+  )
+  if (!blobMatch) {
+    throw new Error('Unable to find webout blob in debug log response.')
+  }
+
+  const blobContent = blobMatch[1]
+  const stripped = blobContent.includes('>>weboutBEGIN<<')
+    ? parseWeboutResponse(blobContent)
+    : blobContent
+
+  return getValidJson(stripped)
+}
diff --git a/src/utils/spec/parseViyaLogDebugResponse.spec.ts b/src/utils/spec/parseViyaLogDebugResponse.spec.ts
new file mode 100644
index 0000000..2683d0a
--- /dev/null
+++ b/src/utils/spec/parseViyaLogDebugResponse.spec.ts
@@ -0,0 +1,55 @@
+import { parseSasViyaLogDebugResponse } from '../parseViyaLogDebugResponse'
+
+describe('parseSasViyaLogDebugResponse', () => {
+  it('should extract and parse JSON from inline Blob', async () => {
+    const resultData = { message: 'success' }
+    const response = `<html><body><script>
+var blob = new Blob([\`${JSON.stringify(resultData)}\`], {type: 'application/json'});
+</script></body></html>`
+
+    const result = await parseSasViyaLogDebugResponse(response)
+
+    expect(result).toEqual(resultData)
+  })
+
+  it('should extract and parse multiline JSON from inline Blob', async () => {
+    const resultData = {
+      SYSDATE: '13MAY26',
+      SYSCC: '0',
+      saslibs: [{ LIBRARYREF: 'FORMATS' }]
+    }
+    const response = `<script>
+var blob = new Blob([\`{"SYSDATE" : "13MAY26"
+,"SYSCC" : "0"
+,"saslibs": [{"LIBRARYREF":"FORMATS"}]
+}
+\`], {type: 'application/json'});
+</script>`
+
+    const result = await parseSasViyaLogDebugResponse(response)
+
+    expect(result).toEqual(resultData)
+  })
+
+  it('should extract and parse JSON wrapped in weboutBEGIN/END (text/plain blob)', async () => {
+    const resultData = { SYSCC: '1012', SYSERRORTEXT: 'File missing.' }
+    const response = `<script>
+var blob = new Blob([\`>>weboutBEGIN<<
+${JSON.stringify(resultData)}
+>>weboutEND<<
+\`], {type: 'text/plain'});
+</script>`
+
+    const result = await parseSasViyaLogDebugResponse(response)
+
+    expect(result).toEqual(resultData)
+  })
+
+  it('should throw an error if blob is not found', async () => {
+    const response = `<html><body>No blob here</body></html>`
+
+    await expect(parseSasViyaLogDebugResponse(response)).rejects.toThrow(
+      'Unable to find webout blob in debug log response.'
+    )
+  })
+})