refactor(event): remove ModelLoaded and ToolAdded

Author: tonyfettes

agent/agent.mbt

@@ -366,7 +366,6 @@ pub async fn new(
   event_target.add_listener(event => logger.info("Received event", data={
     "event": event.to_json(),
   }))
-  event_target.emit(ModelLoaded(name=model.name, model~))
   let history = session_manager.new_conversation(name="history")
   let external_events = match external_events {
     Some(queue) => queue
@@ -429,7 +428,6 @@ pub async fn load(
     json.remove("msg")
     logger.info(msg, data=json)
   })
-  event_target.emit(ModelLoaded(name=model.name, model~))
   let external_events = match external_events {
     Some(queue) => queue
     None => @event.ExternalEventQueue::new()

agent/agent_tool.mbt

@@ -146,7 +146,6 @@ fn Agent::add_agent_tool(
 ) -> Unit {
   let desc = tool.desc()
   agent.tools[desc.name] = Tool::new(tool, enabled~)
-  agent.emit(ToolAdded(desc))
 }
 
 ///|

cmd/jsonl2md/formatter.mbt

@@ -436,18 +436,6 @@ fn Formatter::format_post_tool_call(
   self.lines.push("")
 }
 
-///|
-fn Formatter::format_model_loaded(
-  self : Formatter,
-  name : String,
-  timestamp? : Int64,
-) -> Unit raise {
-  self.push_title("System information", timestamp?)
-  self.lines.push("")
-  self.lines.push("Model: \{name}")
-  self.lines.push("")
-}
-
 ///|
 /// Formats a log entry from JSON.
 async fn Formatter::format_log_entry(self : Formatter, json : Json) -> Unit {
@@ -553,7 +541,6 @@ async fn Formatter::format_log_entry(self : Formatter, json : Json) -> Unit {
         PostToolCall(tool_call, result~, rendered=text) =>
           self.format_post_tool_call(tool_call.name, result~, text, timestamp?)
         UserMessage(content) => self.format_user_message(content, timestamp?)
-        ModelLoaded(name~, ..) => self.format_model_loaded(name, timestamp?)
         _ => ()
       }
   }

cmd/jsonl2md/formatter_wbtest.mbt

@@ -1328,39 +1328,6 @@ test "recover_diagnostics" {
   )
 }
 
-///|
-async test "ModelLoaded" (t : @test.Test) {
-  @mock.run(t, _ => {
-    let event_target = @event.EventTarget::new()
-    event_target.emit(
-      ModelLoaded(
-        name="qwen/qwen3-coder-plus",
-        model=@model.Model::new(
-          name="qwen/qwen3-coder-plus",
-          description="Qwen coder",
-          model_name="qwen/qwen3-coder-plus",
-          model_type=SaaS(OpenAI),
-          api_key="sk-test",
-          base_url="https://openrouter.ai/api/v1",
-          safe_zone_tokens=256000,
-          supports_anthropic_prompt_caching=false,
-        ),
-      ),
-    )
-    inspect(
-      format_event_target(event_target),
-      content=(
-        #|# System information
-        #|
-        #|00:00:00
-        #|
-        #|Model: qwen/qwen3-coder-plus
-        #|
-      ),
-    )
-  })
-}
-
 ///|
 async test "subagent" (t : @test.Test) {
   @mock.run(t, mock => {
@@ -1558,18 +1525,8 @@ async test "timestamp" (t : @test.Test) {
   @mock.run(t, _ => {
     let event_target = @event.EventTarget::new()
     event_target.emit(
-      ModelLoaded(
-        name="qwen/qwen3-coder-plus",
-        model=@model.Model::new(
-          name="qwen/qwen3-coder-plus",
-          description="Qwen coder",
-          model_name="qwen/qwen3-coder-plus",
-          model_type=SaaS(OpenAI),
-          api_key="sk-test",
-          base_url="https://openrouter.ai/api/v1",
-          safe_zone_tokens=256000,
-          supports_anthropic_prompt_caching=false,
-        ),
+      UserMessage(
+        "Write the file `toml_parser/src/moon.pkg.json` with the content:\n\n```json\n{\n  \"name\": \"toml_parser\",\n  \"version\": \"1.0.0\",\n  \"description\": \"A MoonBit package for parsing TOML files.\",\n  \"main\": \"src/main.mbt\",\n  \"scripts\": {\n    \"build\": \"moon build\",\n    \"test\": \"moon test\"\n  },\n  \"dependencies\": {\n    \"moonbit/core\": \"^1.0.0\"\n  }\n}\n```",
       ),
     )
     event_target.emit(
@@ -1589,13 +1546,29 @@ async test "timestamp" (t : @test.Test) {
     inspect(
       format_event_target(event_target),
       content=(
-        #|# System information
+        #|# 1 User: Write the file `toml_parser/src/moon.pkg.json` with the content:
         #|
         #|00:00:00
         #|
-        #|Model: qwen/qwen3-coder-plus
+        #|Write the file `toml_parser/src/moon.pkg.json` with the content:
+        #|
+        #|```json
+        #|{
+        #|  "name": "toml_parser",
+        #|  "version": "1.0.0",
+        #|  "description": "A MoonBit package for parsing TOML files.",
+        #|  "main": "src/main.mbt",
+        #|  "scripts": {
+        #|    "build": "moon build",
+        #|    "test": "moon test"
+        #|  },
+        #|  "dependencies": {
+        #|    "moonbit/core": "^1.0.0"
+        #|  }
+        #|}
+        #|```
         #|
-        #|# 1 Tool call result: <meta_write_to_file path="toml_parser/src/moon.pkg.json">
+        #|# 2 Tool call result: <meta_write_to_file path="toml_parser/src/moon.pkg.json">
         #|
         #|00:00:00
         #|

cmd/jsonl2md/moon.pkg.json

@@ -15,7 +15,6 @@
   "overrides": ["moonbitlang/maria/internal/abort"],
   "wbtest-import": [
     "moonbitlang/maria/internal/mock",
-    "moonbitlang/maria/internal/pino",
-    "moonbitlang/maria/model"
+    "moonbitlang/maria/internal/pino"
   ]
 }

event/event.mbt

@@ -34,8 +34,6 @@ pub(all) struct Event {
 
 ///|
 pub(all) enum EventDesc {
-  /// Event triggered when a model is loaded.
-  ModelLoaded(name~ : String, model~ : @model.Model)
   /// Event triggered before a conversation starts.
   PreConversation
   /// Event triggered after a conversation ends.
@@ -48,9 +46,6 @@ pub(all) enum EventDesc {
   /// The message ID can be obtained via the return value of `queue_message`
   /// function.
   MessageQueued(id~ : @uuid.Uuid)
-  /// Event triggered when a tool is added to the agent. This message will only
-  /// be triggered once per agent instance.
-  ToolAdded(@tool.ToolDesc)
   /// Event triggered before a tool is called.
   PreToolCall(@ai.ToolCall)
   /// Event triggered after a tool call is completed.
@@ -95,20 +90,6 @@ pub(all) enum EventDesc {
 ///|
 pub impl ToJson for EventDesc with to_json(self : EventDesc) -> Json {
   match self {
-    ModelLoaded(name~, model~) =>
-      {
-        "msg": "ModelLoaded",
-        "name": name.to_json(),
-        "model": {
-          let json = model.to_json()
-          if json is Object(obj) {
-            obj["api_key"] = "****"
-            Json::object(obj)
-          } else {
-            json
-          }
-        },
-      }
     TokenCounted(token_count) =>
       { "msg": "TokenCounted", "token_count": token_count }
     ContextPruned(origin_token_count~, pruned_token_count~) =>
@@ -174,15 +155,6 @@ pub impl ToJson for EventDesc with to_json(self : EventDesc) -> Json {
     MessageQueued(id~) => { "msg": "MessageQueued", "message": { "id": id } }
     MessageUnqueued(id~) =>
       { "msg": "MessageUnqueued", "message": { "id": id } }
-    ToolAdded(tool_desc) =>
-      {
-        "msg": "ToolAdded",
-        "tool": {
-          "name": tool_desc.name,
-          "description": tool_desc.description,
-          "schema": tool_desc.schema,
-        },
-      }
     AssistantMessage(usage~, tool_calls~, content) => {
       let json : Map[String, Json] = {
         "msg": "AssistantMessage",
@@ -213,27 +185,6 @@ pub impl @json.FromJson for EventDesc with from_json(
     )
   }
   match msg {
-    "ModelLoaded" => {
-      guard json_object.get("name") is Some(name_json) else {
-        raise @json.JsonDecodeError(
-          (json_path, "ModelLoaded event missing 'name' field"),
-        )
-      }
-      let name : String = @json.from_json(
-        name_json,
-        path=json_path.add_key("name"),
-      )
-      guard json_object.get("model") is Some(model_json) else {
-        raise @json.JsonDecodeError(
-          (json_path, "ModelLoaded event missing 'model' field"),
-        )
-      }
-      let model : @model.Model = @json.from_json(
-        model_json,
-        path=json_path.add_key("model"),
-      )
-      ModelLoaded(name~, model~)
-    }
     "TokenCounted" => {
       guard json_object.get("token_count") is Some(token_count_json) else {
         raise @json.JsonDecodeError(
@@ -365,36 +316,6 @@ pub impl @json.FromJson for EventDesc with from_json(
       )
       MessageUnqueued(id~)
     }
-    "ToolAdded" => {
-      guard json_object.get("tool") is Some(tool_json) else {
-        raise @json.JsonDecodeError(
-          (json_path, "ToolAdded event missing 'tool' field"),
-        )
-      }
-      guard tool_json
-        is Object(
-          {
-            "name": name_json,
-            "description": description_json,
-            "schema": schema_json,
-            ..
-          }
-        ) else {
-        raise @json.JsonDecodeError(
-          (json_path, "Invalid 'tool' field in ToolAdded event"),
-        )
-      }
-      let name : String = @json.from_json(
-        name_json,
-        path=json_path.add_key("tool").add_key("name"),
-      )
-      let description : String = @json.from_json(
-        description_json,
-        path=json_path.add_key("tool").add_key("description"),
-      )
-      let schema : Json = schema_json
-      ToolAdded(@tool.tool_desc(description~, name~, schema~))
-    }
     "AssistantMessage" => {
       let usage : @ai.Usage? = match json_object.get("usage") {
         None | Some(Null) => None