Fix OpenRouter prompt cache stickiness

f314123857cbfaf5248c0e52ba19120d8e02a16a

permissionBRICK <40219477+permissionBRICK@users.noreply.github.com>

public/scripts/openai.js+9 -0 Viewed

     extension_prompt_roles,
     extension_prompt_types,
     Generate,
+    getCurrentChatId,
     getExtensionPrompt,
     getExtensionPromptMaxDepth,
     getMediaDisplay,

+    }
     if (settings.chat_completion_source === chat_completion_sources.OPENROUTER) {
+        const chatId = getCurrentChatId();
+        if (chatId) {
+            // Keep OpenRouter on the same provider endpoint for the lifetime of
+            // this chat so provider-side prompt caches survive follow-up turns.
+            // Hash the local chat ID instead of exposing its filename.
+            generate_data.session_id = `st-${getStringHash(chatId)}`;
+        }
         generate_data.top_k = Number(settings.top_k_openai);
         generate_data.min_p = Number(settings.min_p_openai);
         generate_data.repetition_penalty = Number(settings.repetition_penalty_openai);

src/endpoints/backends/chat-completions.js+4 -0 Viewed

                 },
             };
+            if (typeof request.body.session_id === 'string' && request.body.session_id.length <= 256) {
+                bodyParams['session_id'] = request.body.session_id;
+            }
             if (request.body.min_p !== undefined) {
                 bodyParams['min_p'] = request.body.min_p;
+            }