diff --git a/src/handlers/commands.ts b/src/handlers/commands.ts
index 0057ea7..ab95530 100644
--- a/src/handlers/commands.ts
+++ b/src/handlers/commands.ts
@@ -39,7 +39,7 @@ export function registerCommands(
 
     // Run Claude session creation without blocking the bot
     claude.createSession(
-      "You are now connected via Telegram. Briefly confirm you're ready and state the project directory.",
+      "Ты подключён через Telegram. Коротко подтверди готовность и укажи рабочую директорию проекта.",
       resolved.path,
     ).then(({ sessionId, result }) => {
       manager.createSession(resolved.name, resolved.path, sessionId);
diff --git a/src/services/claude.ts b/src/services/claude.ts
index 1d05cc7..1f3312b 100644
--- a/src/services/claude.ts
+++ b/src/services/claude.ts
@@ -42,12 +42,12 @@ function runClaude(args: string[], cwd: string): Promise<string> {
   });
 }
 
-const SYSTEM_PROMPT = "Always respond in Russian. Be concise.";
+const APPEND_PROMPT = "Always respond in Russian. Be concise.";
 
 export class ClaudeService {
   async createSession(prompt: string, cwd: string): Promise<ClaudeResult> {
     const raw = await runClaude(
-      ["-p", prompt, "--output-format", "json", "--dangerously-skip-permissions", "--system-prompt", SYSTEM_PROMPT],
+      ["-p", prompt, "--output-format", "json", "--dangerously-skip-permissions", "--append-system-prompt", APPEND_PROMPT],
       cwd,
     );
 
@@ -61,7 +61,7 @@ export class ClaudeService {
 
   async sendMessage(prompt: string, sessionId: string): Promise<string> {
     const raw = await runClaude(
-      ["-p", prompt, "--output-format", "json", "--resume", sessionId, "--dangerously-skip-permissions"],
+      ["-p", prompt, "--output-format", "json", "--resume", sessionId, "--dangerously-skip-permissions", "--append-system-prompt", APPEND_PROMPT],
       process.cwd(),
     );