FEATURE: allow persona to only force tool calls on limited replies (#827)

This introduces another configuration that allows operators to
limit the amount of interactions with forced tool usage.

Forced tools are very handy in initial llm interactions, but as
conversation progresses they can hinder by slowing down stuff
and adding confusion.

app/controllers/discourse_ai/admin/ai_personas_controller.rb

@@ -106,6 +106,7 @@ module DiscourseAi
             :question_consolidator_llm,
             :allow_chat,
             :tool_details,
+            :forced_tool_count,
             allowed_group_ids: [],
             rag_uploads: [:id],
           )

app/models/ai_persona.rb

@@ -20,6 +20,7 @@ class AiPersona < ActiveRecord::Base
   validates :rag_chunk_tokens, numericality: { greater_than: 0, maximum: 50_000 }
   validates :rag_chunk_overlap_tokens, numericality: { greater_than: -1, maximum: 200 }
   validates :rag_conversation_chunks, numericality: { greater_than: 0, maximum: 1000 }
+  validates :forced_tool_count, numericality: { greater_than: -2, maximum: 100_000 }
   has_many :rag_document_fragments, dependent: :destroy, as: :target
 
   belongs_to :created_by, class_name: "User"
@@ -185,6 +186,7 @@ class AiPersona < ActiveRecord::Base
 
       define_method(:tools) { tools }
       define_method(:force_tool_use) { force_tool_use }
+      define_method(:forced_tool_count) { @ai_persona&.forced_tool_count }
       define_method(:options) { options }
       define_method(:temperature) { @ai_persona&.temperature }
       define_method(:top_p) { @ai_persona&.top_p }
@@ -282,11 +284,19 @@ end
 #  mentionable                 :boolean          default(FALSE), not null
 #  default_llm                 :text
 #  max_context_posts           :integer
+#  max_post_context_tokens     :integer
+#  max_context_tokens          :integer
 #  vision_enabled              :boolean          default(FALSE), not null
 #  vision_max_pixels           :integer          default(1048576), not null
 #  rag_chunk_tokens            :integer          default(374), not null
 #  rag_chunk_overlap_tokens    :integer          default(10), not null
 #  rag_conversation_chunks     :integer          default(10), not null
+#  role                        :enum             default("bot"), not null
+#  role_category_ids           :integer          default([]), not null, is an Array
+#  role_tags                   :string           default([]), not null, is an Array
+#  role_group_ids              :integer          default([]), not null, is an Array
+#  role_whispers               :boolean          default(FALSE), not null
+#  role_max_responses_per_hour :integer          default(50), not null
 #  question_consolidator_llm   :text
 #  allow_chat                  :boolean          default(FALSE), not null
 #  tool_details                :boolean          default(TRUE), not null

app/serializers/localized_ai_persona_serializer.rb

@@ -25,7 +25,8 @@ class LocalizedAiPersonaSerializer < ApplicationSerializer
              :rag_conversation_chunks,
              :question_consolidator_llm,
              :allow_chat,
-             :tool_details
+             :tool_details,
+             :forced_tool_count
 
   has_one :user, serializer: BasicUserSerializer, embed: :object
   has_many :rag_uploads, serializer: UploadSerializer, embed: :object

assets/javascripts/discourse/admin/models/ai-persona.js

@@ -28,6 +28,7 @@ const CREATE_ATTRIBUTES = [
   "question_consolidator_llm",
   "allow_chat",
   "tool_details",
+  "forced_tool_count",
 ];
 
 const SYSTEM_ATTRIBUTES = [
@@ -154,6 +155,7 @@ export default class AiPersona extends RestModel {
 
     const persona = AiPersona.create(attrs);
     persona.forcedTools = (this.forcedTools || []).slice();
+    persona.forced_tool_count = this.forced_tool_count || -1;
     return persona;
   }
 }

assets/javascripts/discourse/components/ai-forced-tool-strategy-selector.gjs

@@ -0,0 +1,29 @@
+import { computed } from "@ember/object";
+import I18n from "discourse-i18n";
+import ComboBox from "select-kit/components/combo-box";
+
+export default ComboBox.extend({
+  content: computed(function () {
+    const content = [
+      {
+        id: -1,
+        name: I18n.t("discourse_ai.ai_persona.tool_strategies.all"),
+      },
+    ];
+
+    [1, 2, 5].forEach((i) => {
+      content.push({
+        id: i,
+        name: I18n.t("discourse_ai.ai_persona.tool_strategies.replies", {
+          count: i,
+        }),
+      });
+    });
+
+    return content;
+  }),
+
+  selectKitOptions: {
+    filterable: false,
+  },
+});

assets/javascripts/discourse/components/ai-persona-editor.gjs

@@ -20,6 +20,7 @@ import AdminUser from "admin/models/admin-user";
 import ComboBox from "select-kit/components/combo-box";
 import GroupChooser from "select-kit/components/group-chooser";
 import DTooltip from "float-kit/components/d-tooltip";
+import AiForcedToolStrategySelector from "./ai-forced-tool-strategy-selector";
 import AiLlmSelector from "./ai-llm-selector";
 import AiPersonaToolOptions from "./ai-persona-tool-options";
 import AiToolSelector from "./ai-tool-selector";
@@ -49,7 +50,11 @@ export default class PersonaEditor extends Component {
   }
 
   get allowForceTools() {
-    return !this.editingModel?.system && this.editingModel?.tools?.length > 0;
+    return !this.editingModel?.system && this.selectedToolNames.length > 0;
+  }
+
+  get hasForcedTools() {
+    return this.forcedToolNames.length > 0;
   }
 
   @action
@@ -381,12 +386,23 @@ export default class PersonaEditor extends Component {
         <div class="control-group">
           <label>{{I18n.t "discourse_ai.ai_persona.forced_tools"}}</label>
           <AiToolSelector
-            class="ai-persona-editor__tools"
+            class="ai-persona-editor__forced_tools"
             @value={{this.forcedToolNames}}
             @tools={{this.selectedTools}}
             @onChange={{this.forcedToolsChanged}}
           />
         </div>
+        {{#if this.hasForcedTools}}
+          <div class="control-group">
+            <label>{{I18n.t
+                "discourse_ai.ai_persona.forced_tool_strategy"
+              }}</label>
+            <AiForcedToolStrategySelector
+              class="ai-persona-editor__forced_tool_strategy"
+              @value={{this.editingModel.forced_tool_count}}
+            />
+          </div>
+        {{/if}}
       {{/if}}
       {{#unless this.editingModel.system}}
         <AiPersonaToolOptions

config/locales/client.en.yml

@@ -116,6 +116,11 @@ en:
         select_option: "Select an option..."
 
       ai_persona:
+        tool_strategies:
+          all: "Apply to all replies"
+          replies:
+            one: "Apply to first reply only"
+            other: "Apply to first %{count} replies"
         back: Back
         name: Name
         edit: Edit
@@ -142,6 +147,7 @@ en:
         question_consolidator_llm: Language Model for Question Consolidator
         question_consolidator_llm_help: The language model to use for the question consolidator, you may choose a less powerful model to save costs.
         system_prompt: System Prompt
+        forced_tool_strategy: Forced Tool Strategy
         allow_chat: "Allow Chat"
         allow_chat_help: "If enabled, users in allowed groups can DM this persona"
         save: Save

db/migrate/20241009230724_add_forced_tool_count_to_ai_personas.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class AddForcedToolCountToAiPersonas < ActiveRecord::Migration[7.1]
+  def change
+    add_column :ai_personas, :forced_tool_count, :integer, default: -1, null: false
+  end
+end

lib/ai_bot/bot.rb

@@ -72,6 +72,11 @@ module DiscourseAi
         forced_tools = persona.force_tool_use.map { |tool| tool.name }
         force_tool = forced_tools.find { |name| !context[:chosen_tools].include?(name) }
 
+        if force_tool && persona.forced_tool_count > 0
+          user_turns = prompt.messages.select { |m| m[:type] == :user }.length
+          force_tool = false if user_turns > persona.forced_tool_count
+        end
+
         if force_tool
           context[:chosen_tools] << force_tool
           prompt.tool_choice = force_tool

lib/ai_bot/personas/persona.rb

@@ -117,6 +117,10 @@ module DiscourseAi
           []
         end
 
+        def forced_tool_count
+          -1
+        end
+
         def required_tools
           []
         end

spec/lib/modules/ai_bot/playground_spec.rb

@@ -127,19 +127,33 @@ RSpec.describe DiscourseAi::AiBot::Playground do
 
     it "can force usage of a tool" do
       tool_name = "custom-#{custom_tool.id}"
-      ai_persona.update!(tools: [[tool_name, nil, true]])
+      ai_persona.update!(tools: [[tool_name, nil, true]], forced_tool_count: 1)
       responses = [function_call, "custom tool did stuff (maybe)"]
 
       prompts = nil
+      reply_post = nil
+
       DiscourseAi::Completions::Llm.with_prepared_responses(responses) do |_, _, _prompts|
         new_post = Fabricate(:post, raw: "Can you use the custom tool?")
-        _reply_post = playground.reply_to(new_post)
+        reply_post = playground.reply_to(new_post)
         prompts = _prompts
       end
 
       expect(prompts.length).to eq(2)
       expect(prompts[0].tool_choice).to eq("search")
       expect(prompts[1].tool_choice).to eq(nil)
+
+      ai_persona.update!(forced_tool_count: 1)
+      responses = ["no tool call here"]
+
+      DiscourseAi::Completions::Llm.with_prepared_responses(responses) do |_, _, _prompts|
+        new_post = Fabricate(:post, raw: "Will you use the custom tool?", topic: reply_post.topic)
+        _reply_post = playground.reply_to(new_post)
+        prompts = _prompts
+      end
+
+      expect(prompts.length).to eq(1)
+      expect(prompts[0].tool_choice).to eq(nil)
     end
 
     it "uses custom tool in conversation" do

spec/requests/admin/ai_personas_controller_spec.rb

@@ -39,9 +39,10 @@ RSpec.describe DiscourseAi::Admin::AiPersonasController do
         Fabricate(
           :ai_persona,
           name: "search2",
-          tools: [["SearchCommand", { base_query: "test" }]],
+          tools: [["SearchCommand", { base_query: "test" }, true]],
           mentionable: true,
           default_llm: "anthropic:claude-2",
+          forced_tool_count: 2,
         )
       persona2.create_user!
 
@@ -55,6 +56,7 @@ RSpec.describe DiscourseAi::Admin::AiPersonasController do
       expect(serializer_persona2["default_llm"]).to eq("anthropic:claude-2")
       expect(serializer_persona2["user_id"]).to eq(persona2.user_id)
       expect(serializer_persona2["user"]["id"]).to eq(persona2.user_id)
+      expect(serializer_persona2["forced_tool_count"]).to eq(2)
 
       tools = response.parsed_body["meta"]["tools"]
       search_tool = tools.find { |c| c["id"] == "Search" }
@@ -85,7 +87,9 @@ RSpec.describe DiscourseAi::Admin::AiPersonasController do
       )
 
       expect(serializer_persona1["tools"]).to eq(["SearchCommand"])
-      expect(serializer_persona2["tools"]).to eq([["SearchCommand", { "base_query" => "test" }]])
+      expect(serializer_persona2["tools"]).to eq(
+        [["SearchCommand", { "base_query" => "test" }, true]],
+      )
     end
 
     context "with translations" do
@@ -165,6 +169,7 @@ RSpec.describe DiscourseAi::Admin::AiPersonasController do
           temperature: 0.5,
           mentionable: true,
           default_llm: "anthropic:claude-2",
+          forced_tool_count: 2,
         }
       end
 
@@ -183,6 +188,7 @@ RSpec.describe DiscourseAi::Admin::AiPersonasController do
           expect(persona_json["temperature"]).to eq(0.5)
           expect(persona_json["mentionable"]).to eq(true)
           expect(persona_json["default_llm"]).to eq("anthropic:claude-2")
+          expect(persona_json["forced_tool_count"]).to eq(2)
 
           persona = AiPersona.find(persona_json["id"])
 

spec/system/admin_ai_persona_spec.rb

@@ -19,6 +19,17 @@ RSpec.describe "Admin AI persona configuration", type: :system, js: true do
     tool_selector = PageObjects::Components::SelectKit.new(".ai-persona-editor__tools")
     tool_selector.expand
     tool_selector.select_row_by_value("Read")
+    tool_selector.collapse
+
+    tool_selector = PageObjects::Components::SelectKit.new(".ai-persona-editor__forced_tools")
+    tool_selector.expand
+    tool_selector.select_row_by_value("Read")
+    tool_selector.collapse
+
+    strategy_selector =
+      PageObjects::Components::SelectKit.new(".ai-persona-editor__forced_tool_strategy")
+    strategy_selector.expand
+    strategy_selector.select_row_by_value(1)
 
     find(".ai-persona-editor__save").click()
 
@@ -30,7 +41,8 @@ RSpec.describe "Admin AI persona configuration", type: :system, js: true do
     expect(persona.name).to eq("Test Persona")
     expect(persona.description).to eq("I am a test persona")
     expect(persona.system_prompt).to eq("You are a helpful bot")
-    expect(persona.tools).to eq([["Read", { "read_private" => nil }, false]])
+    expect(persona.tools).to eq([["Read", { "read_private" => nil }, true]])
+    expect(persona.forced_tool_count).to eq(1)
   end
 
   it "will not allow deletion or editing of system personas" do

test/javascripts/unit/models/ai-persona-test.js

@@ -51,6 +51,7 @@ module("Discourse AI | Unit | Model | ai-persona", function () {
       question_consolidator_llm: "Question Consolidator LLM",
       allow_chat: false,
       tool_details: true,
+      forced_tool_count: -1,
     };
 
     const aiPersona = AiPersona.create({ ...properties });
@@ -92,6 +93,7 @@ module("Discourse AI | Unit | Model | ai-persona", function () {
       question_consolidator_llm: "Question Consolidator LLM",
       allow_chat: false,
       tool_details: true,
+      forced_tool_count: -1,
     };
 
     const aiPersona = AiPersona.create({ ...properties });