fix: default model to claude-opus-4-6

rust/.claude/sessions/session-1775008071886.json

@@ -0,0 +1 @@
+{"messages":[],"version":1}

rust/crates/api/src/client.rs

@@ -906,7 +906,7 @@ mod tests {
     #[test]
     fn message_request_stream_helper_sets_stream_true() {
         let request = MessageRequest {
-            model: "claude-3-7-sonnet-latest".to_string(),
+            model: "claude-opus-4-6".to_string(),
             max_tokens: 64,
             messages: vec![],
             system: None,

rust/crates/rusty-claude-cli/src/args.rs

@@ -9,7 +9,7 @@ use clap::{Parser, Subcommand, ValueEnum};
     about = "Rust Claude CLI prototype"
 )]
 pub struct Cli {
-    #[arg(long, default_value = "claude-3-7-sonnet")]
+    #[arg(long, default_value = "claude-opus-4-6")]
     pub model: String,
 
     #[arg(long, value_enum, default_value_t = PermissionMode::WorkspaceWrite)]

rust/crates/rusty-claude-cli/src/main.rs

@@ -34,7 +34,7 @@ use runtime::{
 use serde_json::json;
 use tools::{execute_tool, mvp_tool_specs, ToolSpec};
 
-const DEFAULT_MODEL: &str = "claude-sonnet-4-20250514";
+const DEFAULT_MODEL: &str = "claude-opus-4-6";
 const DEFAULT_MAX_TOKENS: u32 = 32;
 const DEFAULT_DATE: &str = "2026-03-31";
 const DEFAULT_OAUTH_CALLBACK_PORT: u16 = 4545;