Chat: Add AI reply prefixes

Experimentation yields that prefixing a reply with something drives
the AI to possibly produce more targeted and meaningful conversation.

The example I used is showing an AI's "thoughts" in a message via
the use of backticks. By automatically prefixing {{char}}'s thoughts,
the AI generates an internal monologue that the user can also use
for their own responses.

This feature is stable, but in an experimental state for now in terms
of expansion.

Signed-off-by: kingbri <bdashore3@proton.me>

public/index.html

@@ -1851,6 +1851,19 @@
                             </div>
                         </div>
                         <div>
+                            <h4>
+                                <span data-i18n="Start Reply With">
+                                    Start Reply With
+                                </span>
+                            </h4>
+                            <div>
+                                <input id="start_reply_with" class="text_pole textarea_compact" type="text" placeholder="AI reply prefix" />
+                            </div>
+                            <label class="checkbox_label" for="chat-show-reply-prefix-checkbox"><input id="chat-show-reply-prefix-checkbox" type="checkbox" />
+                                <span data-i18n="Show reply prefix in chat">
+                                    Show reply prefix in chat
+                                </span>
+                            </label>
                             <h4>
                                 <span data-i18n="Pygmalion Formatting">
                                     Pygmalion Formatting

public/script.js

@@ -1062,6 +1062,11 @@ function messageFormatting(mes, ch_name, isSystem, isUser) {
         mes = '';
     }
 
+    // Prompt bias replacement should be applied on the raw message
+    if (!power_user.show_user_prompt_bias && ch_name && !isUser && !isSystem) {
+        mes = mes.replaceAll(substituteParams(power_user.user_prompt_bias), "");
+    }
+
     if (power_user.auto_fix_generated_markdown) {
         mes = fixMarkdown(mes);
     }
@@ -1122,7 +1127,6 @@ function messageFormatting(mes, ch_name, isSystem, isUser) {
          //console.log('mes after removed <tags>')
          //console.log(mes)
      } */
-
     return mes;
 }
 
@@ -2308,7 +2312,17 @@ async function Generate(type, { automatic_trigger, force_name2, resolve, reject,
                     if (!mesSendString.endsWith('\n')) {
                         mesSendString += '\n';
                     }
-                    mesSendString += (`${name2}:${promptBias || ''}`);
+
+                    let addedPromptBias = promptBias || substituteParams(power_user.user_prompt_bias) || '';
+
+                    // Add a leading space to the prompt bias if applicable
+                    if (addedPromptBias.length !== 0 && !addedPromptBias.startsWith(' ')) {
+                        addedPromptBias = ` ${addedPromptBias}`
+                    }
+
+                    mesSendString += (`${name2}:${addedPromptBias}`);
+                } else if (power_user.user_prompt_bias) {
+                    mesSendString += substituteParams(power_user.user_prompt_bias);
                 }
 
                 return mesSendString;
@@ -3309,32 +3323,29 @@ function extractTitleFromData(data) {
 }
 
 function extractMessageFromData(data) {
-    let getMessage = "";
+    switch (main_api) {
-
+        case 'kobold':
-    if (main_api == 'kobold') {
+            return data.results[0].text;
-        getMessage = data.results[0].text;
+        case 'koboldhorde':
+            return data.text;
+        case 'textgenerationwebui':
+            return data.results[0].text;
+        case 'novel':
+            return data.output;
+        case 'openai':
+        case 'poe':
+            return data;
+        default:
+            return ''
     }
-
-    if (main_api == 'koboldhorde') {
-        getMessage = data.text;
-    }
-
-    if (main_api == 'textgenerationwebui') {
-        getMessage = data.results[0].text;
-    }
-
-    if (main_api == 'novel') {
-        getMessage = data.output;
-    }
-
-    if (main_api == 'openai' || main_api == 'poe') {
-        getMessage = data;
-    }
-
-    return getMessage;
 }
 
 function cleanUpMessage(getMessage, isImpersonate, displayIncompleteSentences = false) {
+    // Append the user bias first before trimming anything else
+    if (power_user.user_prompt_bias && power_user.user_prompt_bias.length !== 0) {
+        getMessage = substituteParams(power_user.user_prompt_bias) + getMessage;
+    }
+
     if (!displayIncompleteSentences && power_user.trim_sentences) {
         getMessage = end_trim_to_sentence(getMessage, power_user.include_newline);
     }

public/scripts/power-user.js

@@ -101,6 +101,8 @@ let power_user = {
     trim_sentences: false,
     include_newline: false,
     always_force_name2: false,
+    user_prompt_bias: '',
+    show_user_prompt_bias: true,
     multigen: false,
     multigen_first_chunk: 50,
     multigen_next_chunks: 30,
@@ -598,6 +600,8 @@ function loadPowerUserSettings(settings, data) {
     $("#waifuMode").prop("checked", power_user.waifuMode);
     $("#movingUImode").prop("checked", power_user.movingUI);
     $("#noShadowsmode").prop("checked", power_user.noShadows);
+    $("#start_reply_with").val(power_user.user_prompt_bias);
+    $("#chat-show-reply-prefix-checkbox").prop("checked", power_user.show_user_prompt_bias);
     $("#multigen").prop("checked", power_user.multigen);
     $("#multigen_first_chunk").val(power_user.multigen_first_chunk);
     $("#multigen_next_chunks").val(power_user.multigen_next_chunks);
@@ -1074,6 +1078,17 @@ $(document).ready(() => {
         reloadMarkdownProcessor(power_user.render_formulas);
     });
 
+    $("#start_reply_with").on('input', function() {
+        power_user.user_prompt_bias = $(this).val();
+        saveSettingsDebounced();
+    });
+
+    $("#chat-show-reply-prefix-checkbox").change(function () {
+        power_user.show_user_prompt_bias = !!$(this).prop("checked");
+        reloadCurrentChat();
+        saveSettingsDebounced();
+    })
+
     $("#multigen").change(function () {
         power_user.multigen = $(this).prop("checked");
         saveSettingsDebounced();