chore: Bump version to 0.1.9

- Wire model_max_output_tokens config to Chat Completions API
- Config takes precedence over provider default for max_tokens

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

llmx-rs/Cargo.toml

@@ -43,7 +43,7 @@ members = [
 resolver = "2"
 
 [workspace.package]
-version = "0.1.8"
+version = "0.1.9"
 # Track the edition for all workspace crates in one place. Individual
 # crates can still override this value, but keeping it here means new
 # crates created with `cargo new -w ...` automatically inherit the 2024

llmx-rs/core/src/chat_completions.rs

@@ -45,6 +45,7 @@ pub(crate) async fn stream_chat_completions(
     provider: &ModelProviderInfo,
     otel_event_manager: &OtelEventManager,
     session_source: &SessionSource,
+    model_max_output_tokens: Option<i64>,
 ) -> Result<ResponseStream> {
     if prompt.output_schema.is_some() {
         return Err(LlmxErr::UnsupportedOperation(
@@ -443,8 +444,10 @@ pub(crate) async fn stream_chat_completions(
     });
 
     // Add max_tokens - required by Anthropic Messages API
-    // Use provider config value or default to 20480 (5 * 4096, Claude Sonnet 4.5 supports up to 64K)
-    let max_tokens = provider.max_tokens.unwrap_or(20480);
+    // Priority: config model_max_output_tokens > provider max_tokens > default 20480
+    let max_tokens = model_max_output_tokens
+        .or(provider.max_tokens)
+        .unwrap_or(20480);
     if let Some(obj) = payload.as_object_mut() {
         obj.insert("max_tokens".to_string(), json!(max_tokens));
     }

llmx-rs/core/src/client.rs

@@ -152,6 +152,7 @@ impl ModelClient {
                     &self.provider,
                     &self.otel_event_manager,
                     &self.session_source,
+                    self.config.model_max_output_tokens,
                 )
                 .await?;
 

llmx-rs/core/src/config/mod.rs

@@ -973,6 +973,8 @@ impl Config {
 
         let mut model_providers = built_in_model_providers();
         // Merge user-defined providers into the built-in list.
+        // Note: This uses or_insert() so built-in providers take precedence.
+        // For custom max_tokens, use model_max_output_tokens config instead.
         for (key, provider) in cfg.model_providers.into_iter() {
             model_providers.entry(key).or_insert(provider);
         }