fix: keep browser for in-flight runs + downgrade 5.1 pro API

Author: steipete

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Fixed
 - Browser uploads: detect ChatGPT’s composer attachment chip (not echoed in the last user turn) to avoid false “Attachment did not appear” failures. Thanks Mariano Belinky (@mbelinky) for the fix.
+- Browser interruption: if the user/agent sends SIGINT/SIGTERM/SIGQUIT while the assistant response is still pending, Oracle leaves Chrome running, writes runtime hints, and logs how to reattach with `oracle session <slug>` instead of killing the browser mid-run.
 
 ## 0.5.3 — 2025-12-06
 

src/browser/chromeLifecycle.ts

@@ -41,6 +41,12 @@ export function registerTerminationHooks(
   userDataDir: string,
   keepBrowser: boolean,
   logger: BrowserLogger,
+  opts?: {
+    /** Return true when the run is still in-flight (assistant response pending). */
+    isInFlight?: () => boolean;
+    /** Persist runtime hints so reattach can find the live Chrome. */
+    emitRuntimeHint?: () => Promise<void>;
+  },
 ): () => void {
   const signals: NodeJS.Signals[] = ['SIGINT', 'SIGTERM', 'SIGQUIT'];
   let handling: boolean | undefined;
@@ -50,13 +56,21 @@ export function registerTerminationHooks(
       return;
     }
     handling = true;
-    if (keepBrowser) {
-      logger(`Received ${signal}; leaving Chrome running for potential reattach`);
+    const inFlight = opts?.isInFlight?.() ?? false;
+    const leaveRunning = keepBrowser || inFlight;
+    if (leaveRunning) {
+      logger(`Received ${signal}; leaving Chrome running${inFlight ? ' (assistant response pending)' : ''}`);
     } else {
       logger(`Received ${signal}; terminating Chrome process`);
     }
     void (async () => {
-      if (!keepBrowser) {
+      if (leaveRunning) {
+        // Ensure reattach hints are written before we exit.
+        await opts?.emitRuntimeHint?.().catch(() => undefined);
+        if (inFlight) {
+          logger('Session still in flight; reattach with "oracle session <slug>" to continue.');
+        }
+      } else {
         try {
           await chrome.kill();
         } catch {

src/browser/index.ts

@@ -136,7 +136,10 @@ export async function runBrowserMode(options: BrowserRunOptions): Promise<Browse
   const chromeHost = (chrome as unknown as { host?: string }).host ?? '127.0.0.1';
   let removeTerminationHooks: (() => void) | null = null;
   try {
-    removeTerminationHooks = registerTerminationHooks(chrome, userDataDir, effectiveKeepBrowser, logger);
+    removeTerminationHooks = registerTerminationHooks(chrome, userDataDir, effectiveKeepBrowser, logger, {
+      isInFlight: () => runStatus !== 'complete',
+      emitRuntimeHint,
+    });
   } catch {
     // ignore failure; cleanup still happens below
   }

src/oracle/run.ts

@@ -240,15 +240,18 @@ export async function runOracle(options: RunOracleOptions, deps: RunOracleDeps =
         : DEFAULT_TIMEOUT_NON_PRO_MS / 1000
       : options.timeoutSeconds;
   const timeoutMs = timeoutSeconds * 1000;
+  const apiModelFromConfig = modelConfig.apiModel ?? modelConfig.model;
+  const modelDowngraded = apiModelFromConfig === 'gpt-5.1-pro';
+  const resolvedApiModelId = modelDowngraded ? 'gpt-5-pro' : apiModelFromConfig;
   // Track the concrete model id we dispatch to (especially for Gemini preview aliases)
   const effectiveModelId =
     options.effectiveModelId ??
     (options.model.startsWith('gemini')
       ? resolveGeminiModelId(options.model)
-      : modelConfig.apiModel ?? modelConfig.model);
+      : resolvedApiModelId);
   const headerModelLabel = richTty ? chalk.cyan(modelConfig.model) : modelConfig.model;
   const requestBody = buildRequestBody({
-    modelConfig,
+    modelConfig: { ...modelConfig, apiModel: resolvedApiModelId },
     systemPrompt,
     userPrompt: promptWithFiles,
     searchEnabled,
@@ -279,6 +282,9 @@ export async function runOracle(options: RunOracleOptions, deps: RunOracleDeps =
     if (baseUrl) {
       log(dim(`Base URL: ${formatBaseUrlForLog(baseUrl)}`));
     }
+    if (modelDowngraded) {
+      log(dim('gpt-5.1-pro is not yet available via API; sending request with gpt-5-pro instead.'));
+    }
     if (options.background && !supportsBackground) {
       log(dim('Background runs are not supported for this model; streaming in foreground instead.'));
     }