feat(code): add /clear command to reset conversation history

apps/code/src/renderer/features/message-editor/commands.ts

@@ -1,4 +1,5 @@
 import type { AvailableCommand } from "@agentclientprotocol/sdk";
+import { getSessionService } from "@features/sessions/service/service";
 import { ANALYTICS_EVENTS, type FeedbackType } from "@shared/types/analytics";
 import { track } from "@utils/analytics";
 import { toast } from "@utils/toast";
@@ -51,6 +52,18 @@ const commands: CodeCommand[] = [
   makeFeedbackCommand("good", "good", "Positive"),
   makeFeedbackCommand("bad", "bad", "Negative"),
   makeFeedbackCommand("feedback", "general", "General"),
+  {
+    name: "clear",
+    description: "Clear conversation history and start fresh",
+    async execute(_args, ctx) {
+      if (!ctx.repoPath || !ctx.taskId) {
+        toast.error("Cannot clear: no active session");
+        return;
+      }
+      await getSessionService().resetSession(ctx.taskId, ctx.repoPath);
+      toast.success("Conversation cleared");
+    },
+  },
 ];
 
 export const CODE_COMMANDS: AvailableCommand[] = commands.map((cmd) => ({

apps/code/src/renderer/features/sessions/service/service.ts

@@ -1747,11 +1747,23 @@ export class SessionService {
 
   /**
    * Start a fresh session for a task, abandoning the old conversation.
-   * Clears the backend sessionId so the next reconnect creates a new
-   * session instead of attempting to resume the stale one.
+   * Tears down the current session and creates a new task run so that
+   * S3 logs start clean — old messages won't reappear on restart.
    */
   async resetSession(taskId: string, repoPath: string): Promise<void> {
-    await this.reconnectInPlace(taskId, repoPath, null);
+    const session = sessionStoreSetters.getSessionByTaskId(taskId);
+    if (!session) return;
+
+    const { taskTitle } = session;
+
+    await this.teardownSession(session.taskRunId);
+
+    const auth = this.getAuthCredentials();
+    if (!auth) {
+      throw new Error("Unable to reach server. Please check your connection.");
+    }
+
+    await this.createNewLocalSession(taskId, taskTitle, repoPath, auth);
   }
 
   /**

packages/agent/src/adapters/claude/session/commands.ts

@@ -2,6 +2,7 @@ import type { AvailableCommand } from "@agentclientprotocol/sdk";
 import type { SlashCommand } from "@anthropic-ai/claude-agent-sdk";
 
 const UNSUPPORTED_COMMANDS = [
+  "clear",
   "context",
   "cost",
   "keybindings-help",