| 1 | //! RPC bridge that services `llm_query` / `rlm_query` calls coming back |
| 2 | //! from the long-lived Python REPL during an RLM turn. |
| 3 | //! |
| 4 | //! This is the spiritual successor to the HTTP sidecar from earlier |
| 5 | //! versions — except instead of binding a localhost port and routing |
| 6 | //! through `urllib`, requests come in through stdin/stdout and we just |
| 7 | //! call the LLM client directly here in Rust. |
| 8 | //! |
| 9 | //! The bridge tracks cumulative token usage and the recursion budget. For |
| 10 | //! `Rlm` / `RlmBatch` requests it recursively calls `run_rlm_turn_inner` |
| 11 | //! at depth-1; the future-type cycle (bridge → run_rlm_turn_inner → |
| 12 | //! bridge) is broken by `run_rlm_turn_inner` returning a boxed dyn future. |
| 13 | |
| 14 | use std::sync::Arc; |
| 15 | use std::time::Duration; |
| 16 | use std::{future::Future, pin::Pin}; |
| 17 | |
| 18 | use anyhow::Result; |
| 19 | use futures_util::future::join_all; |
| 20 | use tokio::sync::Mutex; |
| 21 | |
| 22 | use crate::llm_client::LlmClient; |
| 23 | use crate::models::{ContentBlock, Message, MessageRequest, MessageResponse, SystemPrompt, Usage}; |
| 24 | use crate::repl::runtime::{BatchResp, RpcDispatcher, RpcRequest, RpcResponse, SingleResp}; |
| 25 | use crate::utils::spawn_supervised; |
| 26 | |
| 27 | /// Object-safe runtime-model adapter for a working kernel. |
| 28 | /// |
| 29 | /// The normal turn loop owns a `SharedModelClient`, while the original RLM |
| 30 | /// bridge predates that boundary and accepts the concrete [`LlmClient`] trait. |
| 31 | /// Keeping this small adapter here means a persistent kernel follows exactly |
| 32 | /// the selected model route (including custom providers) without teaching the |
| 33 | /// kernel about provider transports or falling back to a side channel. |
| 34 | pub(crate) struct ModelClientRlmAdapter { |
| 35 | client: crate::core::model_client::SharedModelClient, |
| 36 | } |
| 37 | |
| 38 | impl ModelClientRlmAdapter { |
| 39 | pub(crate) fn new(client: crate::core::model_client::SharedModelClient) -> Self { |
| 40 | Self { client } |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | /// Per-child completion timeout — same as the previous sidecar default. |
| 45 | const CHILD_TIMEOUT_SECS: u64 = 120; |
| 46 | /// Default `max_tokens` for one-shot child completions. |
| 47 | const DEFAULT_CHILD_MAX_TOKENS: u32 = 4096; |
| 48 | /// Hard cap on prompts per batch RPC. |
| 49 | pub const MAX_BATCH: usize = 16; |
| 50 | |
| 51 | /// Object-safe slice of the LLM client interface that the RLM bridge needs. |
| 52 | /// |
| 53 | /// `LlmClient` itself uses native async trait methods, which are not dyn-safe. |
| 54 | /// The bridge only needs non-streaming completions, so this boxed-future shim |
| 55 | /// gives tests a clean mock seam without changing the wider provider trait. |
| 56 | pub(crate) trait RlmLlmClient: Send + Sync { |
| 57 | fn create_message_boxed( |
| 58 | &self, |
| 59 | request: MessageRequest, |
| 60 | ) -> Pin<Box<dyn Future<Output = Result<MessageResponse>> + Send + '_>>; |
| 61 | } |
| 62 | |
| 63 | impl RlmLlmClient for ModelClientRlmAdapter { |
| 64 | fn create_message_boxed( |
| 65 | &self, |
| 66 | request: MessageRequest, |
| 67 | ) -> Pin<Box<dyn Future<Output = Result<MessageResponse>> + Send + '_>> { |
| 68 | let client = Arc::clone(&self.client); |
| 69 | Box::pin(async move { client.create_message(request).await }) |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | impl<T> RlmLlmClient for T |
| 74 | where |
| 75 | T: LlmClient + Send + Sync, |
| 76 | { |
| 77 | fn create_message_boxed( |
| 78 | &self, |
| 79 | request: MessageRequest, |
| 80 | ) -> Pin<Box<dyn Future<Output = Result<MessageResponse>> + Send + '_>> { |
| 81 | Box::pin(self.create_message(request)) |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | /// State shared with the bridge across all RPC calls in one turn. |
| 86 | pub struct RlmBridge { |
| 87 | client: Arc<dyn RlmLlmClient>, |
| 88 | child_model: String, |
| 89 | /// Recursion budget remaining for `Rlm` / `RlmBatch` requests. When |
| 90 | /// zero, those requests fall back to plain `Llm` completions. |
| 91 | depth_remaining: u32, |
| 92 | usage: Arc<Mutex<Usage>>, |
| 93 | } |
| 94 | |
| 95 | impl RlmBridge { |
| 96 | pub(crate) fn new( |
| 97 | client: Arc<dyn RlmLlmClient>, |
| 98 | child_model: String, |
| 99 | depth_remaining: u32, |
| 100 | ) -> Self { |
| 101 | Self { |
| 102 | client, |
| 103 | child_model, |
| 104 | depth_remaining, |
| 105 | usage: Arc::new(Mutex::new(Usage::default())), |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | pub fn usage_handle(&self) -> Arc<Mutex<Usage>> { |
| 110 | Arc::clone(&self.usage) |
| 111 | } |
| 112 | |
| 113 | async fn dispatch_llm( |
| 114 | &self, |
| 115 | prompt: String, |
| 116 | _model: Option<String>, |
| 117 | max_tokens: Option<u32>, |
| 118 | system: Option<String>, |
| 119 | ) -> SingleResp { |
| 120 | let request = MessageRequest { |
| 121 | // The Python helper accepts `model=` for older snippets, but it is |
| 122 | // intentionally not authoritative. RLM child calls are pinned to |
| 123 | // the tool's configured child model so model-generated Python |
| 124 | // cannot silently upgrade cheap fanout work to an expensive model. |
| 125 | model: self.child_model.clone(), |
| 126 | messages: vec![Message { |
| 127 | role: "user".to_string(), |
| 128 | content: vec![ContentBlock::Text { |
| 129 | text: prompt, |
| 130 | cache_control: None, |
| 131 | }], |
| 132 | }], |
| 133 | max_tokens: max_tokens.unwrap_or(DEFAULT_CHILD_MAX_TOKENS), |
| 134 | system: system.map(SystemPrompt::Text), |
| 135 | tools: None, |
| 136 | tool_choice: None, |
| 137 | metadata: None, |
| 138 | thinking: None, |
| 139 | reasoning_effort: None, |
| 140 | stream: Some(false), |
| 141 | temperature: Some(0.4_f32), |
| 142 | top_p: Some(0.9_f32), |
| 143 | }; |
| 144 | |
| 145 | let fut = self.client.create_message_boxed(request); |
| 146 | let response = |
| 147 | match tokio::time::timeout(Duration::from_secs(CHILD_TIMEOUT_SECS), fut).await { |
| 148 | Ok(Ok(r)) => r, |
| 149 | Ok(Err(e)) => { |
| 150 | return SingleResp { |
| 151 | text: String::new(), |
| 152 | error: Some(format!("llm_query failed: {e}")), |
| 153 | }; |
| 154 | } |
| 155 | Err(_) => { |
| 156 | return SingleResp { |
| 157 | text: String::new(), |
| 158 | error: Some(format!("llm_query timed out after {CHILD_TIMEOUT_SECS}s")), |
| 159 | }; |
| 160 | } |
| 161 | }; |
| 162 | |
| 163 | let text = response |
| 164 | .content |
| 165 | .iter() |
| 166 | .filter_map(|b| match b { |
| 167 | ContentBlock::Text { text, .. } => Some(text.as_str()), |
| 168 | _ => None, |
| 169 | }) |
| 170 | .collect::<Vec<_>>() |
| 171 | .join("\n"); |
| 172 | |
| 173 | { |
| 174 | let mut u = self.usage.lock().await; |
| 175 | super::add_usage_with_prompt_cache(&mut u, &response.usage); |
| 176 | } |
| 177 | |
| 178 | SingleResp { text, error: None } |
| 179 | } |
| 180 | |
| 181 | async fn dispatch_llm_batch( |
| 182 | &self, |
| 183 | prompts: Vec<String>, |
| 184 | _model: Option<String>, |
| 185 | dependency_mode: Option<String>, |
| 186 | ) -> BatchResp { |
| 187 | if let Some(resp) = batch_guard(prompts.len(), dependency_mode.as_deref()) { |
| 188 | return resp; |
| 189 | } |
| 190 | |
| 191 | let model = Arc::new(self.child_model.clone()); |
| 192 | |
| 193 | let futures = prompts.into_iter().map(|prompt| { |
| 194 | let model = Arc::clone(&model); |
| 195 | async move { |
| 196 | self.dispatch_llm((*prompt).to_string(), Some((*model).clone()), None, None) |
| 197 | .await |
| 198 | } |
| 199 | }); |
| 200 | |
| 201 | BatchResp { |
| 202 | results: join_all(futures).await, |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | async fn dispatch_rlm(&self, prompt: String, _model: Option<String>) -> SingleResp { |
| 207 | if self.depth_remaining == 0 { |
| 208 | // Budget exhausted — fall back to a one-shot child completion |
| 209 | // rather than returning an error. Matches the paper's behaviour |
| 210 | // ("sub_RLM gracefully degrades to llm_query at depth=0"). |
| 211 | return self.dispatch_llm(prompt, None, None, None).await; |
| 212 | } |
| 213 | |
| 214 | // Build a drain channel to absorb status events from the nested |
| 215 | // turn (we don't surface them; this dispatch is invisible to the |
| 216 | // outer agent stream). |
| 217 | let (tx, mut rx) = tokio::sync::mpsc::channel(64); |
| 218 | let drain = spawn_supervised( |
| 219 | "rlm-bridge-drain", |
| 220 | std::panic::Location::caller(), |
| 221 | async move { while rx.recv().await.is_some() {} }, |
| 222 | ); |
| 223 | |
| 224 | let child_model = self.child_model.clone(); |
| 225 | |
| 226 | // Recursive call. The dyn-erasure on `run_rlm_turn_inner` breaks |
| 227 | // the `bridge → turn → bridge` opaque-future cycle. |
| 228 | let result = super::turn::run_rlm_turn_inner( |
| 229 | Arc::clone(&self.client), |
| 230 | child_model.clone(), |
| 231 | prompt, |
| 232 | None, |
| 233 | child_model, |
| 234 | tx, |
| 235 | self.depth_remaining.saturating_sub(1), |
| 236 | ) |
| 237 | .await; |
| 238 | |
| 239 | drain.abort(); |
| 240 | |
| 241 | { |
| 242 | let mut u = self.usage.lock().await; |
| 243 | super::add_usage_with_prompt_cache(&mut u, &result.usage); |
| 244 | } |
| 245 | |
| 246 | SingleResp { |
| 247 | text: result.answer, |
| 248 | error: result.error, |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | async fn dispatch_rlm_batch( |
| 253 | &self, |
| 254 | prompts: Vec<String>, |
| 255 | _model: Option<String>, |
| 256 | dependency_mode: Option<String>, |
| 257 | ) -> BatchResp { |
| 258 | if let Some(resp) = batch_guard(prompts.len(), dependency_mode.as_deref()) { |
| 259 | return resp; |
| 260 | } |
| 261 | |
| 262 | let futures = prompts |
| 263 | .into_iter() |
| 264 | .map(|p| async move { self.dispatch_rlm(p, None).await }); |
| 265 | BatchResp { |
| 266 | results: join_all(futures).await, |
| 267 | } |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | fn batch_guard(prompt_count: usize, dependency_mode: Option<&str>) -> Option<BatchResp> { |
| 272 | if prompt_count == 0 { |
| 273 | return Some(BatchResp { results: vec![] }); |
| 274 | } |
| 275 | if prompt_count > MAX_BATCH { |
| 276 | return Some(BatchResp { |
| 277 | results: (0..prompt_count) |
| 278 | .map(|_| SingleResp { |
| 279 | text: String::new(), |
| 280 | error: Some(format!("batch too large: {prompt_count} > {MAX_BATCH}")), |
| 281 | }) |
| 282 | .collect(), |
| 283 | }); |
| 284 | } |
| 285 | let mode = dependency_mode |
| 286 | .unwrap_or_default() |
| 287 | .trim() |
| 288 | .to_ascii_lowercase() |
| 289 | .replace(['-', ' '], "_"); |
| 290 | if !matches!( |
| 291 | mode.as_str(), |
| 292 | "independent" | "parallel_safe" | "map_reduce" |
| 293 | ) { |
| 294 | return Some(BatchResp { |
| 295 | results: (0..prompt_count) |
| 296 | .map(|_| SingleResp { |
| 297 | text: String::new(), |
| 298 | error: Some( |
| 299 | "batch requires dependency_mode='independent'; use sub_query_sequence or sequential sub_query calls for dependent work" |
| 300 | .to_string(), |
| 301 | ), |
| 302 | }) |
| 303 | .collect(), |
| 304 | }); |
| 305 | } |
| 306 | None |
| 307 | } |
| 308 | |
| 309 | impl RpcDispatcher for RlmBridge { |
| 310 | fn dispatch<'a>( |
| 311 | &'a self, |
| 312 | req: RpcRequest, |
| 313 | ) -> std::pin::Pin<Box<dyn std::future::Future<Output = RpcResponse> + Send + 'a>> { |
| 314 | Box::pin(async move { |
| 315 | match req { |
| 316 | RpcRequest::Llm { |
| 317 | prompt, |
| 318 | model, |
| 319 | max_tokens, |
| 320 | system, |
| 321 | } => { |
| 322 | RpcResponse::Single(self.dispatch_llm(prompt, model, max_tokens, system).await) |
| 323 | } |
| 324 | RpcRequest::LlmBatch { |
| 325 | prompts, |
| 326 | model, |
| 327 | dependency_mode, |
| 328 | safety_note: _, |
| 329 | } => RpcResponse::Batch( |
| 330 | self.dispatch_llm_batch(prompts, model, dependency_mode) |
| 331 | .await, |
| 332 | ), |
| 333 | RpcRequest::Rlm { prompt, model } => { |
| 334 | RpcResponse::Single(self.dispatch_rlm(prompt, model).await) |
| 335 | } |
| 336 | RpcRequest::RlmBatch { |
| 337 | prompts, |
| 338 | model, |
| 339 | dependency_mode, |
| 340 | safety_note: _, |
| 341 | } => RpcResponse::Batch( |
| 342 | self.dispatch_rlm_batch(prompts, model, dependency_mode) |
| 343 | .await, |
| 344 | ), |
| 345 | } |
| 346 | }) |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | #[cfg(test)] |
| 351 | mod tests { |
| 352 | use super::*; |
| 353 | use crate::llm_client::mock::MockLlmClient; |
| 354 | |
| 355 | fn mock_response_with_usage(text: &str, usage: Usage) -> MessageResponse { |
| 356 | MessageResponse { |
| 357 | id: "mock_msg".to_string(), |
| 358 | r#type: "message".to_string(), |
| 359 | role: "assistant".to_string(), |
| 360 | content: vec![ContentBlock::Text { |
| 361 | text: text.to_string(), |
| 362 | cache_control: None, |
| 363 | }], |
| 364 | model: "mock-model".to_string(), |
| 365 | stop_reason: Some("end_turn".to_string()), |
| 366 | stop_sequence: None, |
| 367 | container: None, |
| 368 | usage, |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | fn mock_response(text: &str, input_tokens: u32, output_tokens: u32) -> MessageResponse { |
| 373 | mock_response_with_usage( |
| 374 | text, |
| 375 | Usage { |
| 376 | input_tokens, |
| 377 | output_tokens, |
| 378 | ..Usage::default() |
| 379 | }, |
| 380 | ) |
| 381 | } |
| 382 | |
| 383 | fn bridge_for(mock: Arc<MockLlmClient>, depth_remaining: u32) -> RlmBridge { |
| 384 | let client: Arc<dyn RlmLlmClient> = mock; |
| 385 | RlmBridge::new(client, "child-model".to_string(), depth_remaining) |
| 386 | } |
| 387 | |
| 388 | #[test] |
| 389 | fn batch_guard_allows_non_empty_batches_at_the_cap() { |
| 390 | assert!(batch_guard(MAX_BATCH, Some("independent")).is_none()); |
| 391 | } |
| 392 | |
| 393 | #[test] |
| 394 | fn batch_guard_returns_empty_response_for_empty_batches() { |
| 395 | let response = batch_guard(0, None).expect("empty batch should be handled"); |
| 396 | assert!(response.results.is_empty()); |
| 397 | } |
| 398 | |
| 399 | #[test] |
| 400 | fn batch_guard_returns_one_error_per_oversized_prompt() { |
| 401 | let response = batch_guard(MAX_BATCH + 2, Some("independent")) |
| 402 | .expect("oversized batch should be handled"); |
| 403 | assert_eq!(response.results.len(), MAX_BATCH + 2); |
| 404 | assert!(response.results.iter().all(|result| { |
| 405 | result.text.is_empty() |
| 406 | && result |
| 407 | .error |
| 408 | .as_deref() |
| 409 | .is_some_and(|err| err.contains("batch too large")) |
| 410 | })); |
| 411 | } |
| 412 | |
| 413 | #[test] |
| 414 | fn batch_guard_requires_explicit_independence_for_parallel_work() { |
| 415 | let response = batch_guard(2, None).expect("missing dependency mode should be handled"); |
| 416 | assert_eq!(response.results.len(), 2); |
| 417 | assert!(response.results.iter().all(|result| { |
| 418 | result.text.is_empty() |
| 419 | && result |
| 420 | .error |
| 421 | .as_deref() |
| 422 | .is_some_and(|err| err.contains("dependency_mode='independent'")) |
| 423 | })); |
| 424 | |
| 425 | let response = batch_guard(2, Some("sequential")) |
| 426 | .expect("dependent dependency mode should be handled"); |
| 427 | assert!(response.results.iter().all(|result| { |
| 428 | result |
| 429 | .error |
| 430 | .as_deref() |
| 431 | .is_some_and(|err| err.contains("sub_query_sequence")) |
| 432 | })); |
| 433 | } |
| 434 | |
| 435 | #[tokio::test] |
| 436 | async fn llm_dispatch_pins_configured_child_model() { |
| 437 | let mock = Arc::new(MockLlmClient::new(Vec::new())); |
| 438 | mock.push_message_response(mock_response("child answer", 7, 11)); |
| 439 | let bridge = bridge_for(Arc::clone(&mock), 1); |
| 440 | |
| 441 | let response = bridge |
| 442 | .dispatch(RpcRequest::Llm { |
| 443 | prompt: "child prompt".to_string(), |
| 444 | model: Some("override-model".to_string()), |
| 445 | max_tokens: Some(123), |
| 446 | system: Some("child system".to_string()), |
| 447 | }) |
| 448 | .await; |
| 449 | |
| 450 | match response { |
| 451 | RpcResponse::Single(single) => { |
| 452 | assert_eq!(single.text, "child answer"); |
| 453 | assert!(single.error.is_none()); |
| 454 | } |
| 455 | other => panic!("expected single response, got {other:?}"), |
| 456 | } |
| 457 | |
| 458 | let captured = mock.captured_requests(); |
| 459 | assert_eq!(captured.len(), 1); |
| 460 | assert_eq!(captured[0].model, "child-model"); |
| 461 | assert_eq!(captured[0].max_tokens, 123); |
| 462 | assert_eq!( |
| 463 | captured[0].system, |
| 464 | Some(SystemPrompt::Text("child system".to_string())) |
| 465 | ); |
| 466 | |
| 467 | let usage = bridge.usage.lock().await; |
| 468 | assert_eq!(usage.input_tokens, 7); |
| 469 | assert_eq!(usage.output_tokens, 11); |
| 470 | } |
| 471 | |
| 472 | #[tokio::test] |
| 473 | async fn llm_dispatch_preserves_prompt_cache_usage() { |
| 474 | let mock = Arc::new(MockLlmClient::new(Vec::new())); |
| 475 | mock.push_message_response(mock_response_with_usage( |
| 476 | "cached child answer", |
| 477 | Usage { |
| 478 | input_tokens: 1000, |
| 479 | output_tokens: 100, |
| 480 | prompt_cache_hit_tokens: Some(800), |
| 481 | prompt_cache_miss_tokens: Some(200), |
| 482 | ..Usage::default() |
| 483 | }, |
| 484 | )); |
| 485 | let bridge = bridge_for(Arc::clone(&mock), 1); |
| 486 | |
| 487 | let response = bridge |
| 488 | .dispatch(RpcRequest::Llm { |
| 489 | prompt: "child prompt".to_string(), |
| 490 | model: None, |
| 491 | max_tokens: None, |
| 492 | system: None, |
| 493 | }) |
| 494 | .await; |
| 495 | |
| 496 | match response { |
| 497 | RpcResponse::Single(single) => { |
| 498 | assert_eq!(single.text, "cached child answer"); |
| 499 | assert!(single.error.is_none()); |
| 500 | } |
| 501 | other => panic!("expected single response, got {other:?}"), |
| 502 | } |
| 503 | |
| 504 | let usage = bridge.usage.lock().await; |
| 505 | assert_eq!(usage.input_tokens, 1000); |
| 506 | assert_eq!(usage.output_tokens, 100); |
| 507 | assert_eq!(usage.prompt_cache_hit_tokens, Some(800)); |
| 508 | assert_eq!(usage.prompt_cache_miss_tokens, Some(200)); |
| 509 | } |
| 510 | |
| 511 | #[tokio::test] |
| 512 | async fn llm_batch_dispatch_pins_configured_child_model() { |
| 513 | let mock = Arc::new(MockLlmClient::new(Vec::new())); |
| 514 | mock.push_message_response(mock_response("one", 1, 2)); |
| 515 | mock.push_message_response(mock_response("two", 3, 4)); |
| 516 | mock.push_message_response(mock_response("three", 5, 6)); |
| 517 | let bridge = bridge_for(Arc::clone(&mock), 1); |
| 518 | |
| 519 | let response = bridge |
| 520 | .dispatch(RpcRequest::LlmBatch { |
| 521 | prompts: vec!["a".to_string(), "b".to_string(), "c".to_string()], |
| 522 | model: Some("batch-model".to_string()), |
| 523 | dependency_mode: Some("independent".to_string()), |
| 524 | safety_note: Some("test prompts are independent".to_string()), |
| 525 | }) |
| 526 | .await; |
| 527 | |
| 528 | match response { |
| 529 | RpcResponse::Batch(batch) => { |
| 530 | let texts: Vec<_> = batch |
| 531 | .results |
| 532 | .iter() |
| 533 | .map(|result| result.text.as_str()) |
| 534 | .collect(); |
| 535 | assert_eq!(texts, ["one", "two", "three"]); |
| 536 | assert!(batch.results.iter().all(|result| result.error.is_none())); |
| 537 | } |
| 538 | other => panic!("expected batch response, got {other:?}"), |
| 539 | } |
| 540 | |
| 541 | let captured = mock.captured_requests(); |
| 542 | assert_eq!(captured.len(), 3); |
| 543 | assert!( |
| 544 | captured |
| 545 | .iter() |
| 546 | .all(|request| request.model == "child-model") |
| 547 | ); |
| 548 | |
| 549 | let usage = bridge.usage.lock().await; |
| 550 | assert_eq!(usage.input_tokens, 9); |
| 551 | assert_eq!(usage.output_tokens, 12); |
| 552 | } |
| 553 | |
| 554 | #[tokio::test] |
| 555 | async fn rlm_dispatch_at_depth_zero_pins_configured_child_model() { |
| 556 | let mock = Arc::new(MockLlmClient::new(Vec::new())); |
| 557 | mock.push_message_response(mock_response("fallback answer", 3, 5)); |
| 558 | let bridge = bridge_for(Arc::clone(&mock), 0); |
| 559 | |
| 560 | let response = bridge |
| 561 | .dispatch(RpcRequest::Rlm { |
| 562 | prompt: "nested prompt".to_string(), |
| 563 | model: Some("override-model".to_string()), |
| 564 | }) |
| 565 | .await; |
| 566 | |
| 567 | match response { |
| 568 | RpcResponse::Single(single) => { |
| 569 | assert_eq!(single.text, "fallback answer"); |
| 570 | assert!(single.error.is_none()); |
| 571 | } |
| 572 | other => panic!("expected single response, got {other:?}"), |
| 573 | } |
| 574 | |
| 575 | let usage = bridge.usage.lock().await; |
| 576 | assert_eq!(usage.input_tokens, 3); |
| 577 | assert_eq!(usage.output_tokens, 5); |
| 578 | |
| 579 | let captured = mock.captured_requests(); |
| 580 | assert_eq!(captured.len(), 1); |
| 581 | assert_eq!(captured[0].model, "child-model"); |
| 582 | } |
| 583 | } |
| 584 |