fuzzer: harden runner, fail-closed validation, job isolation and fix AI handoff

fe-app-tachyon/src/tachyon/methods/shell/tests/fuzzerAction.test.ts

@@ -183,6 +183,42 @@ describe('TachyonShellMethods Fuzzer Actions', () => {
     }
   });
 
+  it('starts fuzzer with custom_file from AI synthesis', async () => {
+    mocks.executeShellCommand.mockResolvedValueOnce({
+      stdout: JSON.stringify({
+        success: true,
+        job_id: 'fuzz_ai_42',
+        engine: 'zapret2',
+        target: 'youtube',
+      }),
+      stderr: '',
+      code: 0,
+    });
+
+    const res = await TachyonShellMethods.startFuzzer(
+      'zapret2',
+      'youtube',
+      '',
+      'rule_1',
+      '/var/run/tachyon/fuzzer_ai_strategies.json',
+      'ai_custom',
+    );
+    expect(res.success).toBe(true);
+    expect(mocks.executeShellCommand).toHaveBeenCalledWith(
+      expect.objectContaining({
+        args: [
+          'fuzzer_start',
+          'zapret2',
+          'youtube',
+          '',
+          'rule_1',
+          '/var/run/tachyon/fuzzer_ai_strategies.json',
+          'ai_custom',
+        ],
+      }),
+    );
+  });
+
   it('gets fuzzer patterns configuration', async () => {
     mocks.executeShellCommand.mockResolvedValueOnce({
       stdout: JSON.stringify({

fe-app-tachyon/src/tachyon/tabs/diagnostic/partials/renderStrategyFuzzerModal.ts

@@ -19,6 +19,8 @@ export function renderStrategyFuzzerModal(ruleNames: string[] = []) {
   let currentState: Tachyon.FuzzerState | null = null;
   let resultFilter: 'all' | 'success' | 'fast' = 'all';
   let autoApplyEnabled = false;
+  let autoAppliedJobId: string | null = null;
+  let stoppedManually = false;
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
   let currentDpiDetection: Tachyon.FuzzerDpiDetection | null = null;
 
@@ -1677,9 +1679,18 @@ export function renderStrategyFuzzerModal(ruleNames: string[] = []) {
           lastRenderedFinishedAt = finishedAt;
         }
 
-        if (!isRunning) {
-          // Auto-apply best strategy if enabled
-          if (autoApplyEnabled && currentState?.best_strategy) {
+        if (!isRunning && !stoppedManually) {
+          // Auto-apply best strategy only if benchmark completed 100%, without abort, and not already applied for this job
+          if (
+            autoApplyEnabled &&
+            currentState?.progress_pct === 100 &&
+            !currentState?.aborted &&
+            !currentState?.error &&
+            currentState?.best_strategy &&
+            currentState.job_id &&
+            autoAppliedJobId !== currentState.job_id
+          ) {
+            autoAppliedJobId = currentState.job_id;
             try {
               const applyRes =
                 await TachyonShellMethods.autoApplyFuzzerStrategy(
@@ -1803,6 +1814,7 @@ export function renderStrategyFuzzerModal(ruleNames: string[] = []) {
 
   const handleToggleRun = async () => {
     if (isRunning) {
+      stoppedManually = true;
       (startBtn as HTMLButtonElement).disabled = true;
       startBtn.innerText = _('⏳ Stopping...');
       await TachyonShellMethods.stopFuzzer();
@@ -1813,6 +1825,7 @@ export function renderStrategyFuzzerModal(ruleNames: string[] = []) {
       return;
     }
 
+    stoppedManually = false;
     (startBtn as HTMLButtonElement).disabled = true;
     startBtn.innerText = _('🛑 Stop Benchmark');
 
@@ -1932,6 +1945,7 @@ export function renderStrategyFuzzerModal(ruleNames: string[] = []) {
         activeTab = 'benchmark';
         updateTabVisibility();
 
+        stoppedManually = false;
         (startBtn as HTMLButtonElement).disabled = true;
         startBtn.innerText = _('🛑 Stop Benchmark');
 
@@ -1940,6 +1954,8 @@ export function renderStrategyFuzzerModal(ruleNames: string[] = []) {
           selectedTarget,
           customUrl,
           selectedRuleSection,
+          res.data.custom_file,
+          'ai_custom',
         );
 
         if (startRes.success) {

fe-app-tachyon/src/tachyon/types.ts

@@ -1120,6 +1120,7 @@ export namespace Tachyon {
     results: FuzzerStrategyResult[];
     best_strategy?: FuzzerStrategyResult | null;
     error?: string | null;
+    aborted?: boolean;
     started_at: number;
     finished_at: number;
     dpi_detection?: FuzzerDpiDetection | null;
@@ -1147,6 +1148,7 @@ export namespace Tachyon {
     target?: string;
     target_url?: string;
     analysis?: string;
+    custom_file?: string;
     strategies?: FuzzerStrategyItem[];
     error?: string;
   }