chore(dynamo-run): Refactor to library (#1687)

Move much of what was in the `dynamo-run` crate into `dynamo-llm` so that everyone can use it.

Example usage:

1. Create a `LocalModel`:

```
    let local_model = LocalModelBuilder::default()
	.model_path("Qwen/Qwen3-0.6B")
	.http_port(8080)
	.build().await?;
```

2. Make an engine:

```
    let engine_config = EngineConfig::StaticFull {
	engine: dynamo_engine_mistralrs::make_engine(&local_model).await?,
	model: Box::new(local_model),
    };
```

3. Connect it to an input and run it

```
    dynamo_llm::entrypoint::input::run_input(Input::Http, runtime, engine_config).await?;
```

For https://github.com/ai-dynamo/dynamo/issues/1647

Code Rabbit summary, thanks:
  * Introduced a flexible builder pattern for local model configuration, allowing advanced customization and easier initialization.
  * Added new input modes and unified input handling, supporting interactive chat, HTTP server, batch file, and distributed endpoint modes.
  * Centralized engine configuration and routing, enabling more extensible and maintainable engine management.
  * Simplified and modularized the codebase by moving input and engine logic into dedicated modules.
  * Replaced direct model construction with an asynchronous builder for improved clarity and extensibility.
  * Streamlined configuration and validation for flags and router settings.
  * Added validation to prevent incompatible input and output combinations in endpoint and dynamic modes.

lib/llm/src/discovery/model_manager.rs

@@ -180,7 +180,7 @@ impl ModelManager {
         &self,
         model_name: &str,
         component: &Component,
-        kv_cache_block_size: usize,
+        kv_cache_block_size: u32,
         kv_router_config: Option<KvRouterConfig>,
     ) -> anyhow::Result<Arc<KvRouter>> {
         if let Some(kv_chooser) = self.get_kv_chooser(model_name) {
@@ -209,7 +209,7 @@ impl ModelManager {
         &self,
         model_name: &str,
         component: &Component,
-        kv_cache_block_size: usize,
+        kv_cache_block_size: u32,
         kv_router_config: Option<KvRouterConfig>,
     ) -> anyhow::Result<Arc<KvRouter>> {
         let selector = Box::new(DefaultWorkerSelector::new(kv_router_config));

lib/llm/src/entrypoint.rs

+// SPDX-FileCopyrightText: Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+//! The entrypoint module provides tools to build a Dynamo runner.
+//! - Create an EngineConfig of the engine (potentially auto-discovered) to execute
+//! - Connect it to an Input
+
+pub mod input;
+
+use std::sync::Arc;
+
+use dynamo_runtime::pipeline::RouterMode;
+
+use crate::{
+    backend::ExecutionContext, engines::StreamingEngine, kv_router::KvRouterConfig,
+    local_model::LocalModel,
+};
+
+#[derive(Debug, Clone, Default)]
+pub struct RouterConfig {
+    pub router_mode: RouterMode,
+    pub kv_router_config: KvRouterConfig,
+}
+
+impl RouterConfig {
+    pub fn new(router_mode: RouterMode, kv_router_config: KvRouterConfig) -> Self {
+        Self {
+            router_mode,
+            kv_router_config,
+        }
+    }
+}
+
+pub enum EngineConfig {
+    /// Remote networked engines
+    Dynamic(Box<LocalModel>),
+
+    /// A Full service engine does it's own tokenization and prompt formatting.
+    StaticFull {
+        engine: Arc<dyn StreamingEngine>,
+        model: Box<LocalModel>,
+    },
+
+    /// A core engine expects to be wrapped with pre/post processors that handle tokenization.
+    StaticCore {
+        engine: ExecutionContext,
+        model: Box<LocalModel>,
+    },
+}
+
+impl EngineConfig {
+    fn local_model(&self) -> &LocalModel {
+        use EngineConfig::*;
+        match self {
+            Dynamic(lm) => lm,
+            StaticFull { model, .. } => model,
+            StaticCore { model, .. } => model,
+        }
+    }
+}

lib/llm/src/entrypoint/input.rs

+// SPDX-FileCopyrightText: Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+//! This module contains tools to gather a prompt from a user, forward it to an engine and return
+//! the response.
+//! See the Input enum for the inputs available. Input::Http (OpenAI compatible HTTP server)
+//! and Input::Text (interactive chat) are good places to start.
+//! The main entry point is `run_input`.
+
+use std::{
+    fmt,
+    io::{IsTerminal as _, Read as _},
+    path::PathBuf,
+};
+
+pub mod batch;
+mod common;
+pub mod endpoint;
+pub mod http;
+pub mod text;
+
+use dynamo_runtime::{protocols::ENDPOINT_SCHEME, DistributedRuntime};
+
+const BATCH_PREFIX: &str = "batch:";
+
+/// The various ways of connecting prompts to an engine
+#[derive(PartialEq)]
+pub enum Input {
+    /// Run an OpenAI compatible HTTP server
+    Http,
+
+    /// Single prompt on stdin
+    Stdin,
+
+    /// Interactive chat
+    Text,
+
+    /// Pull requests from a namespace/component/endpoint path.
+    Endpoint(String),
+
+    /// Batch mode. Run all the prompts, write the outputs, exit.
+    Batch(PathBuf),
+}
+
+impl TryFrom<&str> for Input {
+    type Error = anyhow::Error;
+
+    fn try_from(s: &str) -> anyhow::Result<Self> {
+        match s {
+            "http" => Ok(Input::Http),
+            "text" => Ok(Input::Text),
+            "stdin" => Ok(Input::Stdin),
+            endpoint_path if endpoint_path.starts_with(ENDPOINT_SCHEME) => {
+                Ok(Input::Endpoint(endpoint_path.to_string()))
+            }
+            batch_patch if batch_patch.starts_with(BATCH_PREFIX) => {
+                let path = batch_patch.strip_prefix(BATCH_PREFIX).unwrap();
+                Ok(Input::Batch(PathBuf::from(path)))
+            }
+            e => Err(anyhow::anyhow!("Invalid in= option '{e}'")),
+        }
+    }
+}
+
+impl fmt::Display for Input {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let s = match self {
+            Input::Http => "http",
+            Input::Text => "text",
+            Input::Stdin => "stdin",
+            Input::Endpoint(path) => path,
+            Input::Batch(path) => &path.display().to_string(),
+        };
+        write!(f, "{s}")
+    }
+}
+
+impl Default for Input {
+    fn default() -> Self {
+        if std::io::stdin().is_terminal() {
+            Input::Text
+        } else {
+            Input::Stdin
+        }
+    }
+}
+
+/// Run the given engine (EngineConfig) connected to an input.
+/// Does not return until the input exits.
+pub async fn run_input(
+    in_opt: Input,
+    runtime: dynamo_runtime::Runtime,
+    engine_config: super::EngineConfig,
+) -> anyhow::Result<()> {
+    match in_opt {
+        Input::Http => {
+            http::run(runtime.clone(), engine_config).await?;
+        }
+        Input::Text => {
+            text::run(runtime.clone(), None, engine_config).await?;
+        }
+        Input::Stdin => {
+            let mut prompt = String::new();
+            std::io::stdin().read_to_string(&mut prompt).unwrap();
+            text::run(runtime.clone(), Some(prompt), engine_config).await?;
+        }
+        Input::Batch(path) => {
+            batch::run(runtime.clone(), path, engine_config).await?;
+        }
+        Input::Endpoint(path) => {
+            let distributed_runtime = DistributedRuntime::from_settings(runtime.clone()).await?;
+            endpoint::run(distributed_runtime, path, engine_config).await?;
+        }
+    }
+    Ok(())
+}

launch/dynamo-run/src/input/batch.rs → lib/llm/src/entrypoint/input/batch.rs

 // SPDX-FileCopyrightText: Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 // SPDX-License-Identifier: Apache-2.0
 
-use anyhow::Context as _;
-use async_openai::types::FinishReason;
-use dynamo_llm::model_card::model::ModelDeploymentCard;
-use dynamo_llm::preprocessor::OpenAIPreprocessor;
-use dynamo_llm::request_template::RequestTemplate;
-use dynamo_llm::types::openai::chat_completions::{
+use crate::preprocessor::OpenAIPreprocessor;
+use crate::request_template::RequestTemplate;
+use crate::types::openai::chat_completions::{
     NvCreateChatCompletionRequest, OpenAIChatCompletionsStreamingEngine,
 };
+use anyhow::Context as _;
+use async_openai::types::FinishReason;
 use dynamo_runtime::{pipeline::Context, runtime::CancellationToken, Runtime};
 use futures::StreamExt;
 use serde::{Deserialize, Serialize};
@@ -19,8 +18,8 @@ use std::sync::Arc;
 use std::time::{Duration, Instant};
 use tokio::io::{AsyncBufReadExt, AsyncWriteExt};
 
-use crate::input::common;
-use crate::{EngineConfig, Flags};
+use crate::entrypoint::input::common;
+use crate::entrypoint::EngineConfig;
 
 /// Max tokens in each response.
 /// TODO: For batch mode this should be the full context size of the model
@@ -53,11 +52,8 @@ struct Entry {
 
 pub async fn run(
     runtime: Runtime,
-    _flags: Flags,
-    card: ModelDeploymentCard,
     input_jsonl: PathBuf,
     engine_config: EngineConfig,
-    template: Option<RequestTemplate>,
 ) -> anyhow::Result<()> {
     let cancel_token = runtime.primary_token();
     // Check if the path exists and is a directory
@@ -68,11 +64,10 @@ pub async fn run(
         );
     }
 
-    let prepared_engine = common::prepare_engine(runtime, engine_config).await?;
-    let service_name_ref = Arc::new(prepared_engine.service_name);
+    let mut prepared_engine = common::prepare_engine(runtime, engine_config).await?;
 
-    let pre_processor = if card.has_tokenizer() {
-        Some(OpenAIPreprocessor::new(card).await?)
+    let pre_processor = if prepared_engine.has_tokenizer() {
+        Some(OpenAIPreprocessor::new(prepared_engine.card.take().unwrap()).await?)
     } else {
         None
     };
@@ -85,6 +80,7 @@ pub async fn run(
             tracing::error!(%err, "Failed writing output to {}", output_file.display());
         }
     });
+    let service_name_ref = Arc::new(prepared_engine.service_name);
 
     let tokens_in = Arc::new(AtomicU64::new(0));
     let tokens_out = Arc::new(AtomicU64::new(0));
@@ -98,7 +94,7 @@ pub async fn run(
     tracing::info!("Timer start.");
     let start = Instant::now();
     let mut lines = buffered_input.lines();
-    let template: Option<Arc<RequestTemplate>> = template.map(Arc::new);
+    let template: Option<Arc<RequestTemplate>> = prepared_engine.request_template.map(Arc::new);
     while let Ok(Some(line)) = lines.next_line().await {
         if cancel_token.is_cancelled() {
             break;

launch/dynamo-run/src/input/common.rs → lib/llm/src/entrypoint/input/common.rs

@@ -3,13 +3,15 @@
 
 use std::pin::Pin;
 
-use dynamo_llm::{
+use crate::{
     backend::{Backend, ExecutionContext},
     discovery::{ModelManager, ModelWatcher, MODEL_ROOT_PATH},
     engines::StreamingEngineAdapter,
+    entrypoint::EngineConfig,
     model_card::ModelDeploymentCard,
     preprocessor::OpenAIPreprocessor,
     protocols::common::llm_backend::{BackendOutput, PreprocessedRequest},
+    request_template::RequestTemplate,
     types::{
         openai::chat_completions::{
             NvCreateChatCompletionRequest, NvCreateChatCompletionStreamResponse,
@@ -25,12 +27,22 @@ use dynamo_runtime::{
 };
 use std::sync::Arc;
 
-use crate::EngineConfig;
-
 pub struct PreparedEngine {
     pub service_name: String,
     pub engine: OpenAIChatCompletionsStreamingEngine,
     pub inspect_template: bool,
+    pub card: Option<ModelDeploymentCard>,
+    pub request_template: Option<RequestTemplate>,
+}
+
+impl PreparedEngine {
+    pub fn has_tokenizer(&self) -> bool {
+        if let Some(card) = self.card.as_ref() {
+            card.has_tokenizer()
+        } else {
+            false
+        }
+    }
 }
 
 /// Turns an EngineConfig into an OpenAI chat-completions and completions supported StreamingEngine.
@@ -39,7 +51,7 @@ pub async fn prepare_engine(
     engine_config: EngineConfig,
 ) -> anyhow::Result<PreparedEngine> {
     match engine_config {
-        EngineConfig::Dynamic => {
+        EngineConfig::Dynamic(local_model) => {
             let distributed_runtime = DistributedRuntime::from_settings(runtime.clone()).await?;
 
             let Some(etcd_client) = distributed_runtime.etcd_client() else {
@@ -71,6 +83,8 @@ pub async fn prepare_engine(
                 service_name: model_service_name,
                 engine,
                 inspect_template: false,
+                card: None,
+                request_template: local_model.request_template(),
             })
         }
         EngineConfig::StaticFull { engine, model } => {
@@ -81,6 +95,8 @@ pub async fn prepare_engine(
                 service_name,
                 engine,
                 inspect_template: false,
+                request_template: model.request_template(),
+                card: Some(model.into_card()),
             })
         }
         EngineConfig::StaticCore {
@@ -99,6 +115,8 @@ pub async fn prepare_engine(
                 service_name,
                 engine: pipeline,
                 inspect_template: true,
+                request_template: model.request_template(),
+                card: Some(model.into_card()),
             })
         }
     }
@@ -137,21 +155,21 @@ where
 #[cfg(test)]
 mod tests {
     use super::*;
-    use dynamo_llm::types::openai::{
+    use crate::types::openai::{
         chat_completions::{NvCreateChatCompletionRequest, NvCreateChatCompletionStreamResponse},
         completions::{NvCreateCompletionRequest, NvCreateCompletionResponse},
     };
 
     const HF_PATH: &str = concat!(
         env!("CARGO_MANIFEST_DIR"),
-        "/../../lib/llm/tests/data/sample-models/mock-llama-3.1-8b-instruct"
+        "/tests/data/sample-models/mock-llama-3.1-8b-instruct"
     );
 
     #[tokio::test]
     async fn test_build_chat_completions_pipeline_core_engine_succeeds() -> anyhow::Result<()> {
         // Create test model card
         let card = ModelDeploymentCard::load(HF_PATH).await?;
-        let engine = dynamo_llm::engines::make_engine_core();
+        let engine = crate::engines::make_engine_core();
 
         // Build pipeline for chat completions
         let pipeline = build_pipeline::<
@@ -170,7 +188,7 @@ mod tests {
     async fn test_build_completions_pipeline_core_engine_succeeds() -> anyhow::Result<()> {
         // Create test model card
         let card = ModelDeploymentCard::load(HF_PATH).await?;
-        let engine = dynamo_llm::engines::make_engine_core();
+        let engine = crate::engines::make_engine_core();
 
         // Build pipeline for completions
         let pipeline =

launch/dynamo-run/src/input/endpoint.rs → lib/llm/src/entrypoint/input/endpoint.rs

 // SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 use std::{future::Future, pin::Pin, sync::Arc};
 
-use dynamo_llm::{
+use crate::{
     backend::Backend,
     engines::StreamingEngineAdapter,
     model_type::ModelType,
@@ -33,7 +21,7 @@ use dynamo_runtime::pipeline::{
 };
 use dynamo_runtime::{protocols::Endpoint as EndpointId, DistributedRuntime};
 
-use crate::EngineConfig;
+use crate::entrypoint::EngineConfig;
 
 pub async fn run(
     distributed_runtime: DistributedRuntime,
@@ -91,7 +79,7 @@ pub async fn run(
 
             (Box::pin(fut), Some(model.card().clone()))
         }
-        EngineConfig::Dynamic => {
+        EngineConfig::Dynamic(_) => {
             // We can only get here for in=dyn out=vllm|sglang`, because vllm and sglang are a
             // subprocess that we talk to like a remote endpoint.
             // That means the vllm/sglang subprocess is doing all the work, we are idle.

launch/dynamo-run/src/input/http.rs → lib/llm/src/entrypoint/input/http.rs

@@ -3,14 +3,12 @@
 
 use std::sync::Arc;
 
-use crate::input::common;
-use crate::{EngineConfig, Flags};
-use dynamo_llm::kv_router::KvRouterConfig;
-use dynamo_llm::{
+use crate::{
     discovery::{ModelManager, ModelWatcher, MODEL_ROOT_PATH},
     engines::StreamingEngineAdapter,
+    entrypoint::{input::common, EngineConfig},
     http::service::service_v2,
-    request_template::RequestTemplate,
+    kv_router::KvRouterConfig,
     types::{
         openai::chat_completions::{
             NvCreateChatCompletionRequest, NvCreateChatCompletionStreamResponse,
@@ -23,32 +21,28 @@ use dynamo_runtime::transports::etcd;
 use dynamo_runtime::{DistributedRuntime, Runtime};
 
 /// Build and run an HTTP service
-pub async fn run(
-    runtime: Runtime,
-    flags: Flags,
-    engine_config: EngineConfig,
-    template: Option<RequestTemplate>,
-) -> anyhow::Result<()> {
+pub async fn run(runtime: Runtime, engine_config: EngineConfig) -> anyhow::Result<()> {
     let http_service = service_v2::HttpService::builder()
-        .port(flags.http_port)
+        .port(engine_config.local_model().http_port())
         .enable_chat_endpoints(true)
         .enable_cmpl_endpoints(true)
         .enable_embeddings_endpoints(true)
-        .with_request_template(template)
+        .with_request_template(engine_config.local_model().request_template())
         .build()?;
     match engine_config {
-        EngineConfig::Dynamic => {
+        EngineConfig::Dynamic(_) => {
             let distributed_runtime = DistributedRuntime::from_settings(runtime.clone()).await?;
             match distributed_runtime.etcd_client() {
                 Some(etcd_client) => {
+                    let router_config = engine_config.local_model().router_config();
                     // Listen for models registering themselves in etcd, add them to HTTP service
                     run_watcher(
                         distributed_runtime,
                         http_service.state().manager_clone(),
                         etcd_client.clone(),
                         MODEL_ROOT_PATH,
-                        flags.router_mode.into(),
-                        Some(flags.kv_router_config()),
+                        router_config.router_mode,
+                        Some(router_config.kv_router_config.clone()),
                     )
                     .await?;
                 }

launch/dynamo-run/src/input/text.rs → lib/llm/src/entrypoint/input/text.rs

 // SPDX-FileCopyrightText: Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 // SPDX-License-Identifier: Apache-2.0
 
-use dynamo_llm::protocols::openai::nvext::NvExt;
-use dynamo_llm::types::openai::chat_completions::{
+use crate::protocols::openai::nvext::NvExt;
+use crate::request_template::RequestTemplate;
+use crate::types::openai::chat_completions::{
     NvCreateChatCompletionRequest, OpenAIChatCompletionsStreamingEngine,
 };
 use dynamo_runtime::{pipeline::Context, runtime::CancellationToken, Runtime};
 use futures::StreamExt;
 use std::io::{ErrorKind, Write};
 
-use crate::input::common;
-use crate::{EngineConfig, Flags, RequestTemplate};
+use crate::entrypoint::input::common;
+use crate::entrypoint::EngineConfig;
 
 /// Max response tokens for each single query. Must be less than model context size.
 /// TODO: Cmd line flag to overwrite this
@@ -18,20 +19,19 @@ const MAX_TOKENS: u32 = 8192;
 
 pub async fn run(
     runtime: Runtime,
-    _flags: Flags,
     single_prompt: Option<String>,
     engine_config: EngineConfig,
-    template: Option<RequestTemplate>,
 ) -> anyhow::Result<()> {
     let cancel_token = runtime.primary_token();
     let prepared_engine = common::prepare_engine(runtime, engine_config).await?;
+    // TODO: Pass prepared_engine directly
     main_loop(
         cancel_token,
         &prepared_engine.service_name,
         prepared_engine.engine,
         single_prompt,
         prepared_engine.inspect_template,
-        template,
+        prepared_engine.request_template,
     )
     .await
 }

lib/llm/src/kv_router.rs

@@ -50,7 +50,7 @@ pub trait WorkerSelector {
         &self,
         workers: &ProcessedEndpoints,
         request: &SchedulingRequest,
-        block_size: usize,
+        block_size: u32,
     ) -> Result<WorkerSelectionResult, KvSchedulerError>;
 }
 
@@ -104,13 +104,13 @@ impl KvRouterConfig {
 pub struct KvRouter {
     indexer: KvIndexer,
     scheduler: KvScheduler,
-    block_size: usize,
+    block_size: u32,
 }
 
 impl KvRouter {
     pub async fn new(
         component: Component,
-        block_size: usize,
+        block_size: u32,
         selector: Option<Box<dyn WorkerSelector + Send + Sync>>,
     ) -> Result<Self> {
         let cancellation_token = component
@@ -196,7 +196,7 @@ impl KvRouter {
     }
 
     /// Get the block size this router was configured with
-    pub fn block_size(&self) -> usize {
+    pub fn block_size(&self) -> u32 {
         self.block_size
     }
 }

lib/llm/src/kv_router/indexer.rs

@@ -119,9 +119,9 @@ pub fn compute_block_hash(data: &[u8]) -> LocalBlockHash {
 /// ### Returns
 ///
 /// A vector of `LocalBlockHash` representing the computed hashes for each chunk of tokens.
-pub fn compute_block_hash_for_seq(tokens: &[u32], kv_block_size: usize) -> Vec<LocalBlockHash> {
+pub fn compute_block_hash_for_seq(tokens: &[u32], kv_block_size: u32) -> Vec<LocalBlockHash> {
     tokens
-        .chunks_exact(kv_block_size) // Split into chunks of kv_block_size elements
+        .chunks_exact(kv_block_size as usize) // Split into chunks of kv_block_size elements
         .map(|chunk| {
             let bytes: Vec<u8> = chunk
                 .iter()
@@ -527,7 +527,7 @@ pub struct KvIndexer {
     /// A handle to the background task managing the KV store.
     task: OnceLock<std::thread::JoinHandle<()>>,
     /// The size of the KV block this indexer can handle.
-    kv_block_size: usize,
+    kv_block_size: u32,
 }
 
 impl KvIndexer {
@@ -544,7 +544,7 @@ impl KvIndexer {
     pub fn new_with_frequency(
         token: CancellationToken,
         expiration_duration: Option<Duration>,
-        kv_block_size: usize,
+        kv_block_size: u32,
     ) -> Self {
         let (event_tx, event_rx) = mpsc::channel::<RouterEvent>(2048);
         let (match_tx, match_rx) = mpsc::channel::<MatchRequest>(128);
@@ -611,11 +611,11 @@ impl KvIndexer {
         }
     }
 
-    pub fn block_size(&self) -> usize {
+    pub fn block_size(&self) -> u32 {
         self.kv_block_size
     }
 
-    pub fn new(token: CancellationToken, kv_block_size: usize) -> Self {
+    pub fn new(token: CancellationToken, kv_block_size: u32) -> Self {
         Self::new_with_frequency(token, None, kv_block_size)
     }
 
@@ -697,7 +697,7 @@ pub struct KvIndexerSharded {
     /// A `CancellationToken` for managing shutdown.
     cancel: CancellationToken,
     /// The size of the KV block this indexer can handle.
-    kv_block_size: usize,
+    kv_block_size: u32,
     worker_assignments: HashMap<WorkerId, usize>,
     worker_counts: Vec<usize>,
 
@@ -723,7 +723,7 @@ impl KvIndexerSharded {
         token: CancellationToken,
         num_shards: usize,
         expiration_duration: Option<Duration>,
-        kv_block_size: usize,
+        kv_block_size: u32,
     ) -> Self {
         let worker_assignments: HashMap<WorkerId, usize> = HashMap::new();
         let worker_counts: Vec<usize> = vec![0; num_shards];
@@ -802,11 +802,11 @@ impl KvIndexerSharded {
         }
     }
 
-    pub fn block_size(&self) -> usize {
+    pub fn block_size(&self) -> u32 {
         self.kv_block_size
     }
 
-    pub fn new(token: CancellationToken, num_shards: usize, kv_block_size: usize) -> Self {
+    pub fn new(token: CancellationToken, num_shards: usize, kv_block_size: u32) -> Self {
         Self::new_with_frequency(token, num_shards, None, kv_block_size)
     }
 }
@@ -1312,24 +1312,20 @@ mod tests {
     #[case(11)]
     #[case(32)]
     #[case(64)]
-    fn test_compute_block_hash_for_seq(#[case] kv_block_size: usize) {
+    fn test_compute_block_hash_for_seq(#[case] kv_block_size: u32) {
         setup();
         // create a sequence of 64 elements
-        let sequence = (0..kv_block_size).map(|i| i as u32).collect::<Vec<u32>>();
+        let sequence = (0..kv_block_size).collect::<Vec<u32>>();
         let hashes = compute_block_hash_for_seq(&sequence, kv_block_size);
         assert_eq!(hashes.len(), 1);
 
         // create a sequence of 65 elements
-        let sequence = (0..(kv_block_size + 1))
-            .map(|i| i as u32)
-            .collect::<Vec<u32>>();
+        let sequence = (0..(kv_block_size + 1)).collect::<Vec<u32>>();
         let hashes = compute_block_hash_for_seq(&sequence, kv_block_size);
         assert_eq!(hashes.len(), 1);
 
         // create a sequence of 129 elements
-        let sequence = (0..(2 * kv_block_size + 1))
-            .map(|i| i as u32)
-            .collect::<Vec<u32>>();
+        let sequence = (0..(2 * kv_block_size + 1)).collect::<Vec<u32>>();
         let hashes = compute_block_hash_for_seq(&sequence, kv_block_size);
         assert_eq!(hashes.len(), 2);
     }
@@ -1337,7 +1333,7 @@ mod tests {
     fn make_indexer(
         token: &CancellationToken,
         num_shards: usize,
-        kv_block_size: usize,
+        kv_block_size: u32,
     ) -> Box<dyn KvIndexerInterface> {
         if num_shards == 1 {
             Box::new(KvIndexer::new(token.clone(), kv_block_size))
@@ -1360,7 +1356,7 @@ mod tests {
 
     #[tokio::test]
     #[apply(indexer_template)]
-    async fn test_kv_indexer_new(num_shards: usize, kv_block_size: usize) {
+    async fn test_kv_indexer_new(num_shards: usize, kv_block_size: u32) {
         setup();
         let token: CancellationToken = CancellationToken::new();
         let _ = make_indexer(&token, num_shards, kv_block_size);
@@ -1368,7 +1364,7 @@ mod tests {
 
     #[tokio::test]
     #[apply(indexer_template)]
-    async fn test_find_matches(num_shards: usize, kv_block_size: usize) {
+    async fn test_find_matches(num_shards: usize, kv_block_size: u32) {
         setup();
         let token = CancellationToken::new();
         let kv_indexer = make_indexer(&token, num_shards, kv_block_size);
@@ -1381,7 +1377,7 @@ mod tests {
 
     #[tokio::test]
     #[apply(indexer_template)]
-    async fn test_find_matches_for_request(num_shards: usize, kv_block_size: usize) {
+    async fn test_find_matches_for_request(num_shards: usize, kv_block_size: u32) {
         setup();
         let token = CancellationToken::new();
         let kv_indexer = make_indexer(&token, num_shards, kv_block_size);
@@ -1394,7 +1390,7 @@ mod tests {
 
     #[tokio::test]
     #[apply(indexer_template)]
-    async fn test_apply_event(num_shards: usize, kv_block_size: usize) {
+    async fn test_apply_event(num_shards: usize, kv_block_size: u32) {
         setup();
         let worker_id = 0;
 
@@ -1409,7 +1405,7 @@ mod tests {
 
     #[tokio::test]
     #[apply(indexer_template)]
-    async fn test_shutdown(num_shards: usize, kv_block_size: usize) {
+    async fn test_shutdown(num_shards: usize, kv_block_size: u32) {
         setup();
         let token = CancellationToken::new();
         let mut kv_indexer = make_indexer(&token, num_shards, kv_block_size);
@@ -1419,7 +1415,7 @@ mod tests {
 
     #[tokio::test]
     #[apply(indexer_template)]
-    async fn test_frequency(num_shards: usize, kv_block_size: usize) {
+    async fn test_frequency(num_shards: usize, kv_block_size: u32) {
         const ONE_MILLIS: Duration = Duration::from_millis(1);
 
         setup();

lib/llm/src/kv_router/publisher.rs

@@ -62,7 +62,7 @@ impl KvEventSource {
     /// Start the event source from a [`KvEventSourceConfig`].
     fn start(
         component: Component,
-        kv_block_size: usize,
+        kv_block_size: u32,
         source_config: KvEventSourceConfig,
         cancellation_token: CancellationToken,
         tx: mpsc::UnboundedSender<KvCacheEvent>,
@@ -98,7 +98,7 @@ impl KvEventSource {
 /// A publisher of KV events.
 pub struct KvEventPublisher {
     /// The size of the KV block.
-    kv_block_size: usize,
+    kv_block_size: u32,
     /// The source of KV events.
     /// Can be `None` if all events provided through [`KvEventPublisher::publish`].
     source: Option<KvEventSource>,
@@ -112,7 +112,7 @@ impl KvEventPublisher {
     pub fn new(
         component: Component,
         worker_id: i64,
-        kv_block_size: usize,
+        kv_block_size: u32,
         source_config: Option<KvEventSourceConfig>,
     ) -> Result<Self> {
         let cancellation_token = CancellationToken::new();
@@ -155,7 +155,7 @@ impl KvEventPublisher {
         self.tx.send(event)
     }
 
-    pub fn kv_block_size(&self) -> usize {
+    pub fn kv_block_size(&self) -> u32 {
         self.kv_block_size
     }
 
@@ -223,7 +223,7 @@ pub async fn start_zmq_listener(
     zmq_topic: String,
     tx: mpsc::UnboundedSender<KvCacheEvent>,
     cancellation_token: CancellationToken,
-    kv_block_size: usize,
+    kv_block_size: u32,
 ) {
     tracing::debug!(
         "KVEventPublisher connecting to ZMQ endpoint {} (topic '{}')",
@@ -335,7 +335,7 @@ pub async fn start_zmq_listener(
 fn convert_event(
     raw: RawKvEvent,
     event_id: u64,
-    kv_block_size: usize,
+    kv_block_size: u32,
     warning_count: &Arc<AtomicU32>,
 ) -> KvCacheEvent {
     match raw {
@@ -382,7 +382,7 @@ fn convert_event(
 }
 
 pub fn create_stored_block_from_parts(
-    kv_block_size: usize,
+    kv_block_size: u32,
     block_hash: i64,
     token_ids: &[u32],
     _lora_id: u64,
@@ -395,7 +395,7 @@ pub fn create_stored_block_from_parts(
 }
 
 pub fn create_stored_blocks(
-    kv_block_size: usize,
+    kv_block_size: u32,
     token_ids: &[u32],
     num_block_tokens: &[u64],
     block_hashes: &[i64],

lib/llm/src/kv_router/scheduler.rs

@@ -92,7 +92,7 @@ pub struct KvScheduler {
 impl KvScheduler {
     pub async fn start(
         ns: Namespace,
-        block_size: usize,
+        block_size: u32,
         endpoints_rx: tokio::sync::watch::Receiver<ProcessedEndpoints>,
         selector: Option<Box<dyn WorkerSelector + Send + Sync>>,
     ) -> Result<Self, KvSchedulerError> {
@@ -299,7 +299,7 @@ impl WorkerSelector for DefaultWorkerSelector {
         &self,
         workers: &ProcessedEndpoints,
         request: &SchedulingRequest,
-        block_size: usize,
+        block_size: u32,
     ) -> Result<WorkerSelectionResult, KvSchedulerError> {
         assert!(request.isl_tokens > 0);
 
@@ -307,7 +307,7 @@ impl WorkerSelector for DefaultWorkerSelector {
             return Err(KvSchedulerError::NoEndpoints);
         }
 
-        let request_blocks = request.isl_tokens.div_ceil(block_size);
+        let request_blocks = request.isl_tokens.div_ceil(block_size as usize);
         let mut worker_logits = HashMap::new();
 
         // Calculate logits for each worker

lib/llm/src/lib.rs

@@ -15,6 +15,7 @@ pub mod common;
 pub mod disagg_router;
 pub mod discovery;
 pub mod engines;
+pub mod entrypoint;
 pub mod gguf;
 pub mod http;
 pub mod hub;

lib/llm/src/local_model.rs

@@ -5,6 +5,9 @@ use std::fs;
 use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
+use anyhow::Context as _;
+use dynamo_runtime::protocols::Endpoint as EndpointId;
+use dynamo_runtime::slug::Slug;
 use dynamo_runtime::traits::DistributedRuntimeProvider;
 use dynamo_runtime::{
     component::{Component, Endpoint},
@@ -12,8 +15,10 @@ use dynamo_runtime::{
 };
 
 use crate::discovery::ModelEntry;
+use crate::entrypoint::RouterConfig;
 use crate::model_card::{self, ModelDeploymentCard};
 use crate::model_type::ModelType;
+use crate::request_template::RequestTemplate;
 
 mod network_name;
 pub use network_name::ModelNetworkName;
@@ -25,58 +30,85 @@ const HF_SCHEME: &str = "hf://";
 /// is invisible, for example in a text chat.
 const DEFAULT_NAME: &str = "dynamo";
 
-#[derive(Debug, Clone)]
-pub struct LocalModel {
-    full_path: PathBuf,
-    card: ModelDeploymentCard,
+/// Engines don't usually provide a default, so we do.
+const DEFAULT_KV_CACHE_BLOCK_SIZE: u32 = 16;
+
+/// We can't have it default to 0, so pick something
+const DEFAULT_HTTP_PORT: u16 = 8080;
+
+pub struct LocalModelBuilder {
+    model_path: Option<PathBuf>,
+    model_name: Option<String>,
+    model_config: Option<PathBuf>,
+    endpoint_id: Option<EndpointId>,
+    context_length: Option<u32>,
+    template_file: Option<PathBuf>,
+    router_config: Option<RouterConfig>,
+    kv_cache_block_size: u32,
+    http_port: u16,
 }
 
-impl Default for LocalModel {
+impl Default for LocalModelBuilder {
     fn default() -> Self {
-        LocalModel {
-            full_path: PathBuf::new(),
-            card: ModelDeploymentCard::with_name_only(DEFAULT_NAME),
+        LocalModelBuilder {
+            kv_cache_block_size: DEFAULT_KV_CACHE_BLOCK_SIZE,
+            http_port: DEFAULT_HTTP_PORT,
+            model_path: Default::default(),
+            model_name: Default::default(),
+            model_config: Default::default(),
+            endpoint_id: Default::default(),
+            context_length: Default::default(),
+            template_file: Default::default(),
+            router_config: Default::default(),
         }
     }
 }
 
-impl LocalModel {
-    pub fn with_name_only(name: &str) -> Self {
-        LocalModel {
-            card: ModelDeploymentCard::with_name_only(name),
-            ..Default::default()
+impl LocalModelBuilder {
+    pub fn model_path(&mut self, model_path: Option<PathBuf>) -> &mut Self {
+        self.model_path = model_path;
+        self
     }
+
+    pub fn model_name(&mut self, model_name: Option<String>) -> &mut Self {
+        self.model_name = model_name;
+        self
     }
 
-    pub fn card(&self) -> &ModelDeploymentCard {
-        &self.card
+    pub fn model_config(&mut self, model_config: Option<PathBuf>) -> &mut Self {
+        self.model_config = model_config;
+        self
     }
 
-    pub fn path(&self) -> &Path {
-        &self.full_path
+    pub fn endpoint_id(&mut self, endpoint_id: EndpointId) -> &mut Self {
+        self.endpoint_id = Some(endpoint_id);
+        self
     }
 
-    pub fn display_name(&self) -> &str {
-        &self.card.display_name
+    pub fn context_length(&mut self, context_length: Option<u32>) -> &mut Self {
+        self.context_length = context_length;
+        self
     }
 
-    pub fn service_name(&self) -> &str {
-        &self.card.service_name
+    /// Passing None resets it to default
+    pub fn kv_cache_block_size(&mut self, kv_cache_block_size: Option<u32>) -> &mut Self {
+        self.kv_cache_block_size = kv_cache_block_size.unwrap_or(DEFAULT_KV_CACHE_BLOCK_SIZE);
+        self
     }
 
-    pub fn is_gguf(&self) -> bool {
-        // GGUF is the only file (not-folder) we accept, so we don't need to check the extension
-        // We will error when we come to parse it
-        self.full_path.is_file()
+    pub fn http_port(&mut self, port: u16) -> &mut Self {
+        self.http_port = port;
+        self
     }
 
-    /// Override max number of tokens in context. We usually only do this to limit kv cache allocation.
-    pub fn set_context_length(&mut self, context_length: usize) {
-        self.card.context_length = context_length;
+    pub fn router_config(&mut self, router_config: RouterConfig) -> &mut Self {
+        self.router_config = Some(router_config);
+        self
     }
 
-    pub fn set_kv_cache_block_size(&mut self, block_size: usize) {
-        self.card.kv_cache_block_size = block_size;
+    pub fn request_template(&mut self, template_file: Option<PathBuf>) -> &mut Self {
+        self.template_file = template_file;
+        self
     }
 
     /// Make an LLM ready for use:
@@ -88,28 +120,60 @@ impl LocalModel {
     /// The model name will depend on what "model_path" is:
     /// - A folder: The last part of the folder name: "/data/llms/Qwen2.5-3B-Instruct" -> "Qwen2.5-3B-Instruct"
     /// - A file: The GGUF filename: "/data/llms/Qwen2.5-3B-Instruct-Q6_K.gguf" -> "Qwen2.5-3B-Instruct-Q6_K.gguf"
-    /// - An HF repo: The HF repo name: "Qwen/Qwen2.5-3B-Instruct" stays the same
-    pub async fn prepare(
-        model_path: &str,
-        override_config: Option<&Path>,
-        override_name: Option<String>,
-    ) -> anyhow::Result<LocalModel> {
-        // Name it
+    /// - An HF repo: The HF repo name: "Qwen/Qwen3-0.6B" stays the same
+    pub async fn build(&mut self) -> anyhow::Result<LocalModel> {
+        // Generate an endpoint ID for this model if the user didn't provide one.
+        // The user only provides one if exposing the model.
+        let endpoint_id = self
+            .endpoint_id
+            .take()
+            .unwrap_or_else(|| internal_endpoint("local_model"));
+        let template = self
+            .template_file
+            .as_deref()
+            .map(RequestTemplate::load)
+            .transpose()?;
+
+        // echo_full engine doesn't need a path. It's an edge case, move it out of the way.
+        if self.model_path.is_none() {
+            return Ok(LocalModel {
+                card: ModelDeploymentCard::with_name_only(
+                    self.model_name.as_deref().unwrap_or(DEFAULT_NAME),
+                ),
+                full_path: PathBuf::new(),
+                endpoint_id,
+                template,
+                http_port: self.http_port,
+                // We always have one. The Option is so we can take it.
+                router_config: self
+                    .router_config
+                    .take()
+                    .expect("unreachable, RouterConfig missing"),
+            });
+        }
+
+        // Main logic. We are running a model.
+        let model_path = self.model_path.take().unwrap();
+        let model_path = model_path.to_str().context("Invalid UTF-8 in model path")?;
 
         // Check for hf:// prefix first, in case we really want an HF repo but it conflicts
         // with a relative path.
         let is_hf_repo =
             model_path.starts_with(HF_SCHEME) || !fs::exists(model_path).unwrap_or(false);
         let relative_path = model_path.trim_start_matches(HF_SCHEME);
-
         let full_path = if is_hf_repo {
             // HF download if necessary
             super::hub::from_hf(relative_path).await?
         } else {
             fs::canonicalize(relative_path)?
         };
+        // --model-config takes precedence over --model-path
+        let model_config_path = self.model_config.as_ref().unwrap_or(&full_path);
+
+        let mut card = ModelDeploymentCard::load(&model_config_path).await?;
 
-        let model_name = override_name.unwrap_or_else(|| {
+        // Usually we infer from the path, self.model_name is user override
+        let model_name = self.model_name.take().unwrap_or_else(|| {
             if is_hf_repo {
                 // HF repos use their full name ("org/name") not the folder name
                 relative_path.to_string()
@@ -124,15 +188,83 @@ impl LocalModel {
                     })
             }
         });
+        card.set_name(&model_name);
 
-        // Load the ModelDeploymentCard
+        card.kv_cache_block_size = self.kv_cache_block_size;
 
-        // --model-config takes precedence over --model-path
-        let model_config_path = override_config.unwrap_or(&full_path);
-        let mut card = ModelDeploymentCard::load(&model_config_path).await?;
-        card.set_name(&model_name);
+        // Override max number of tokens in context. We usually only do this to limit kv cache allocation.
+        if let Some(context_length) = self.context_length {
+            card.context_length = context_length;
+        }
 
-        Ok(LocalModel { full_path, card })
+        Ok(LocalModel {
+            card,
+            full_path,
+            endpoint_id,
+            template,
+            http_port: self.http_port,
+            router_config: self
+                .router_config
+                .take()
+                .expect("unreachable, RouterConfig missing"),
+        })
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct LocalModel {
+    full_path: PathBuf,
+    card: ModelDeploymentCard,
+    endpoint_id: EndpointId,
+    template: Option<RequestTemplate>,
+    http_port: u16, // Only used if input is HTTP server
+    router_config: RouterConfig,
+}
+
+impl LocalModel {
+    pub fn card(&self) -> &ModelDeploymentCard {
+        &self.card
+    }
+
+    pub fn path(&self) -> &Path {
+        &self.full_path
+    }
+
+    pub fn display_name(&self) -> &str {
+        &self.card.display_name
+    }
+
+    pub fn service_name(&self) -> &str {
+        &self.card.service_name
+    }
+
+    pub fn request_template(&self) -> Option<RequestTemplate> {
+        self.template.clone()
+    }
+
+    pub fn http_port(&self) -> u16 {
+        self.http_port
+    }
+
+    pub fn router_config(&self) -> &RouterConfig {
+        &self.router_config
+    }
+
+    pub fn is_gguf(&self) -> bool {
+        // GGUF is the only file (not-folder) we accept, so we don't need to check the extension
+        // We will error when we come to parse it
+        self.full_path.is_file()
+    }
+
+    /// An endpoint to identify this model by.
+    pub fn endpoint_id(&self) -> &EndpointId {
+        &self.endpoint_id
+    }
+
+    /// Drop the LocalModel returning it's ModelDeploymentCard.
+    /// For the case where we only need the card and don't want to clone it.
+    pub fn into_card(self) -> ModelDeploymentCard {
+        self.card
     }
 
     /// Attach this model the endpoint. This registers it on the network
@@ -202,3 +334,13 @@ impl LocalModel {
         Ok(())
     }
 }
+
+/// A random endpoint to use for internal communication
+/// We can't hard code because we may be running several on the same machine (GPUs 0-3 and 4-7)
+fn internal_endpoint(engine: &str) -> EndpointId {
+    EndpointId {
+        namespace: Slug::slugify(&uuid::Uuid::new_v4().to_string()).to_string(),
+        component: engine.to_string(),
+        name: "generate".to_string(),
+    }
+}

lib/llm/src/mocker/kv_manager.rs

@@ -57,7 +57,7 @@ pub struct KvManager {
     max_capacity: usize,
 
     #[getter(copy)]
-    block_size: usize,
+    block_size: u32,
 
     active_blocks: HashMap<UniqueBlock, usize>,
 
@@ -67,7 +67,7 @@ pub struct KvManager {
 }
 
 impl KvManager {
-    pub fn new(max_capacity: usize, block_size: usize) -> Self {
+    pub fn new(max_capacity: usize, block_size: u32) -> Self {
         let active_blocks = HashMap::new();
         let inactive_blocks = LRUEvictor::default();
         let all_blocks = HashSet::new();
@@ -245,7 +245,7 @@ impl KvManager {
         let overlap_blocks = unique_blocks.len() - new_blocks;
 
         // Calculate new tokens
-        let new_tokens = sequence.num_input_tokens() - overlap_blocks * self.block_size;
+        let new_tokens = sequence.num_input_tokens() - overlap_blocks * (self.block_size as usize);
 
         // // Print the full equation with actual values substituted
         // println!("{} = {} - ({} * {}) (new_tokens = num_input_tokens - overlap_blocks * block_size)",
@@ -261,7 +261,7 @@ impl KvManager {
 
         // Calculate prefill compute
         let prefill_compute =
-            new_tokens as f64 * (new_tokens + overlap_blocks * self.block_size) as f64;
+            new_tokens as f64 * (new_tokens + overlap_blocks * (self.block_size as usize)) as f64;
 
         Some(PrefillCost {
             new_tokens,

lib/llm/src/mocker/scheduler.rs

@@ -193,7 +193,7 @@ impl Scheduler {
     pub fn new(
         kv_capacity: usize,
         watermark: f64,
-        block_size: usize,
+        block_size: u32,
         chunk_size: Option<usize>,
         output_tx: Option<mpsc::Sender<Uuid>>,
         cancellation_token: Option<CancellationToken>,
@@ -272,7 +272,7 @@ impl Scheduler {
                         let mut kv_manager_guard = kv_manager_clone.lock().await;
 
                         // Base time needed for decoding (assumed memory bound on KV cache)
-                        let active_tokens = kv_manager_guard.num_active_blocks() * block_size;
+                        let active_tokens = kv_manager_guard.num_active_blocks() * (block_size as usize);
                         // TODO: 2 is a dummy / magic scaling factor
                         let mut generation_time = Duration::from_micros((active_tokens / 2) as u64);
 
@@ -406,7 +406,7 @@ impl Scheduler {
 }
 
 /// Convert a Request to an ActiveSequence
-fn get_active_sequence(request: Request, block_size: usize, chunk_size: usize) -> ActiveSequence {
+fn get_active_sequence(request: Request, block_size: u32, chunk_size: usize) -> ActiveSequence {
     if let Request::Active(active_seq) = request {
         return active_seq;
     }
@@ -475,7 +475,7 @@ mod tests {
 
         let kv_capacity: usize = 500;
         let watermark: f64 = 0.01; // 1% watermark
-        let block_size: usize = 64;
+        let block_size: u32 = 64;
         let chunk_size: usize = 256;
         let num_requests: usize = 100;
         let input_len: usize = 1000;

lib/llm/src/mocker/sequence.rs

@@ -23,7 +23,7 @@ use uuid;
 fn create_unique_blocks_from_sequence(
     tokens: &TokenBlockSequence,
     uuid: Option<uuid::Uuid>,
-    block_size: usize,
+    block_size: u32,
 ) -> Vec<UniqueBlock> {
     let mut unique_blocks: Vec<UniqueBlock> = tokens
         .blocks()
@@ -32,7 +32,7 @@ fn create_unique_blocks_from_sequence(
         .collect();
 
     // Only push the partial block if tokens count isn't a multiple of block_size
-    if tokens.total_tokens() % block_size != 0 {
+    if tokens.total_tokens() % (block_size as usize) != 0 {
         unique_blocks.push(match uuid {
             Some(uuid) => UniqueBlock::PartialBlock(uuid),
             None => UniqueBlock::default(),
@@ -50,7 +50,7 @@ pub struct ActiveSequence {
     tokens: TokenBlockSequence,
 
     #[getter(copy)]
-    block_size: usize,
+    block_size: u32,
 
     #[getter(copy)]
     chunk_size: usize, // TODO: not actually used
@@ -72,7 +72,7 @@ impl ActiveSequence {
     pub fn new(
         tokens: Vec<u32>,
         max_output_tokens: usize,
-        block_size: Option<usize>,
+        block_size: Option<u32>,
         chunk_size: Option<usize>,
     ) -> Self {
         let block_size = block_size.unwrap_or(64);
@@ -96,8 +96,8 @@ impl ActiveSequence {
         }
     }
 
-    pub fn extra_tokens(&self) -> usize {
-        self.len() % self.block_size
+    pub fn extra_tokens(&self) -> u32 {
+        (self.len() % self.block_size as usize) as u32
     }
 
     pub fn len(&self) -> usize {
@@ -112,7 +112,7 @@ impl ActiveSequence {
     pub fn new_with_signal(
         tokens: Vec<u32>,
         max_output_tokens: usize,
-        block_size: Option<usize>,
+        block_size: Option<u32>,
         chunk_size: Option<usize>,
     ) -> (Self, Option<MoveBlock>) {
         let mut sequence = Self::new(tokens, max_output_tokens, block_size, chunk_size);
@@ -125,7 +125,7 @@ impl ActiveSequence {
         self.tokens.append(token).expect("Token push failed.");
         self.generated_tokens += 1;
 
-        if self.len() % self.block_size != 1 {
+        if self.len() % (self.block_size as usize) != 1 {
             return None;
         }
 
@@ -223,7 +223,7 @@ impl ActiveSequence {
         self.generated_tokens = self.generated_tokens.saturating_sub(1);
 
         // Reverts to the last full block
-        if self.tokens.total_tokens() % self.block_size == 0 {
+        if self.tokens.total_tokens() % (self.block_size as usize) == 0 {
             self.unique_blocks.pop();
         }
     }
@@ -285,7 +285,7 @@ mod tests {
         // Verify state after pushing tokens
         assert_eq!(seq1.unique_blocks().len(), 2); // One full block and one partial block
         assert_eq!(seq1.len(), 17);
-        assert_eq!(seq1.len() % seq1.block_size(), 1);
+        assert_eq!(seq1.len() % (seq1.block_size() as usize), 1);
 
         // Create another sequence with block size 16 initialized with tokens [0..17]
         let extended_tokens: Vec<u32> = (0..16).collect();
@@ -335,12 +335,12 @@ mod tests {
             "seq2 should have exactly 3 blocks"
         );
         assert_eq!(
-            seq1.len() % seq1.block_size(),
+            seq1.len() % (seq1.block_size() as usize),
             1,
             "seq1 should have 1 partial token"
         );
         assert_eq!(
-            seq2.len() % seq2.block_size(),
+            seq2.len() % (seq2.block_size() as usize),
             1,
             "seq2 should have 1 partial token"
         );

lib/llm/src/model_card/create.rs

@@ -76,7 +76,7 @@ impl ModelDeploymentCard {
         let content = super::model::load_gguf(gguf_file)?;
         let context_length = content.get_metadata()[&format!("{}.context_length", content.arch())]
             .to_u32()
-            .unwrap_or(0) as usize;
+            .unwrap_or(0);
         tracing::debug!(context_length, "Loaded context length from GGUF");
 
         Ok(Self {

lib/llm/src/model_card/model.rs

@@ -117,11 +117,11 @@ pub struct ModelDeploymentCard {
     pub revision: u64,
 
     /// Max context (in number of tokens) this model can handle
-    pub context_length: usize,
+    pub context_length: u32,
 
     /// Size of a KV cache block - vllm only currently
     /// Passed to the engine and the KV router.
-    pub kv_cache_block_size: usize,
+    pub kv_cache_block_size: u32,
 }
 
 impl ModelDeploymentCard {