1use aether_core::core::{AgentDeps, Prompt};
2use aether_core::events::{
3 AgentEvent, Command, ContextEvent, MessageEvent, ModelEvent, ToolEvent, TurnEvent, TurnOutcome,
4};
5use aether_core::mcp::McpHandle;
6use aether_telemetry::TelemetryRuntime;
7use std::io;
8use std::process::ExitCode;
9use std::sync::Arc;
10use tokio::sync::mpsc;
11use tracing::error;
12
13use crate::telemetry::build_telemetry_runtime;
14
15use super::error::CliError;
16use super::{CliEventKind, RunConfig};
17use crate::output::{OutputFormat, print_message};
18use crate::runtime::RuntimeBuilder;
19use crate::slash_commands::{expand_slash_command, parse_slash_command};
20
21pub async fn run(config: RunConfig) -> Result<ExitCode, CliError> {
22 setup_tracing(config.verbose);
23
24 let telemetry = build_telemetry_runtime(config.telemetry.as_ref(), config.trace_context.clone())?;
25 let result = run_agent(config, telemetry.clone()).await;
26
27 if let Some(telemetry) = telemetry {
28 telemetry.shutdown_or_log();
29 }
30 result
31}
32
33async fn run_agent(config: RunConfig, telemetry: Option<Arc<TelemetryRuntime>>) -> Result<ExitCode, CliError> {
34 let mut spec = config.spec;
35 if let Some(system_prompt) = config.system_prompt {
36 spec.prompts.push(Prompt::text(&system_prompt));
37 }
38
39 let registry = config.agent_catalog.registry().clone();
40 let deps =
41 AgentDeps::new(config.oauth_credential_store, telemetry.as_ref().map(|runtime| runtime.observer_factory()))
42 .with_agent_registry(registry);
43 let (agent, _mcp_snapshot) = RuntimeBuilder::from_spec(config.cwd.clone(), spec)
44 .mcp_sources(config.mcp_config_sources)
45 .agent_deps(deps)
46 .build_ready(vec![])
47 .await?;
48
49 let prompt = expand_prompt(agent.mcp_runtime.handle(), config.prompt).await;
50
51 agent
52 .agent_tx
53 .send(Command::text(&prompt))
54 .await
55 .map_err(|e| CliError::AgentError(format!("Failed to send prompt: {e}")))?;
56
57 let exit_code = stream_output(agent.agent_rx, config.output, &config.events).await;
58
59 drop(agent.agent_tx);
60 agent.agent_handle.await_completion().await;
61
62 Ok(exit_code)
63}
64
65async fn expand_prompt(mcp: &McpHandle, prompt: String) -> String {
66 let Some(slash_command) = parse_slash_command(&prompt) else {
67 return prompt;
68 };
69
70 match expand_slash_command(mcp, slash_command.command_name, slash_command.args_text).await {
71 Ok(expanded) => expanded,
72 Err(error) => {
73 error!("Failed to expand slash command: {error}");
74 prompt
75 }
76 }
77}
78
79async fn stream_output(mut rx: mpsc::Receiver<AgentEvent>, format: OutputFormat, events: &[CliEventKind]) -> ExitCode {
80 while let Some(msg) = rx.recv().await {
81 if should_emit(&msg, events)
82 && let Err(error) = print_message(format, &msg)
83 {
84 eprintln!("Failed to serialize headless event: {error}");
85 return ExitCode::FAILURE;
86 }
87
88 if let Some(outcome) = msg.turn_outcome() {
89 return match outcome {
90 TurnOutcome::Failed { .. } => ExitCode::FAILURE,
91 TurnOutcome::Completed | TurnOutcome::Cancelled => ExitCode::SUCCESS,
92 };
93 }
94 }
95 ExitCode::SUCCESS
96}
97
98fn should_emit(msg: &AgentEvent, include: &[CliEventKind]) -> bool {
99 let Some(kind) = event_kind(msg) else { return false };
100 include.is_empty() || include.contains(&kind)
101}
102
103fn event_kind(msg: &AgentEvent) -> Option<CliEventKind> {
104 match msg {
105 AgentEvent::Message(MessageEvent::Text { is_complete: true, .. }) => Some(CliEventKind::Text),
106 AgentEvent::Message(MessageEvent::Thought { is_complete: true, .. }) => Some(CliEventKind::Thought),
107 AgentEvent::Tool(ToolEvent::Call { .. }) => Some(CliEventKind::ToolCall),
108 AgentEvent::Tool(
109 ToolEvent::Result { .. } | ToolEvent::TaskCreated { .. } | ToolEvent::TaskCompleted { .. },
110 ) => Some(CliEventKind::ToolResult),
111 AgentEvent::Tool(ToolEvent::Error { .. } | ToolEvent::TaskFailed { .. } | ToolEvent::TaskCancelled { .. }) => {
112 Some(CliEventKind::ToolError)
113 }
114 AgentEvent::Turn(TurnEvent::AutoContinue { .. }) => Some(CliEventKind::AutoContinue),
115 AgentEvent::Model(ModelEvent::Switched { .. }) => Some(CliEventKind::ModelSwitched),
116 AgentEvent::Tool(
117 ToolEvent::Progress { .. }
118 | ToolEvent::DisplayUpdate { .. }
119 | ToolEvent::SubAgentProgress { .. }
120 | ToolEvent::TaskStatus { .. },
121 ) => Some(CliEventKind::ToolProgress),
122 AgentEvent::Context(ContextEvent::CompactionStarted { .. }) => Some(CliEventKind::ContextCompactionStarted),
123 AgentEvent::Context(ContextEvent::CompactionEnded { .. }) => Some(CliEventKind::ContextCompactionEnded),
124 AgentEvent::Context(ContextEvent::CompactionResult { .. }) => Some(CliEventKind::ContextCompactionResult),
125 AgentEvent::Context(ContextEvent::UsageUpdated { .. }) => Some(CliEventKind::ContextUsage),
126 AgentEvent::SessionUsage(_) => Some(CliEventKind::SessionUsage),
127 AgentEvent::Context(ContextEvent::Cleared) => Some(CliEventKind::ContextCleared),
128 AgentEvent::Turn(TurnEvent::Started { .. }) => Some(CliEventKind::TurnStarted),
129 AgentEvent::Turn(TurnEvent::Ended { .. }) => Some(CliEventKind::TurnEnded),
130 AgentEvent::Turn(TurnEvent::RetryScheduled { .. }) => Some(CliEventKind::LlmRetryScheduled),
131 AgentEvent::Turn(TurnEvent::LlmCallStarted { .. }) => Some(CliEventKind::LlmCallStarted),
132 AgentEvent::Turn(TurnEvent::LlmCallEnded { .. }) => Some(CliEventKind::LlmCallEnded),
133 AgentEvent::Tool(ToolEvent::DefinitionsUpdated { .. }) => Some(CliEventKind::ToolDefinitionsUpdated),
134 AgentEvent::Message(
135 MessageEvent::Text { is_complete: false, .. } | MessageEvent::Thought { is_complete: false, .. },
136 )
137 | AgentEvent::Tool(ToolEvent::InputStarted { .. } | ToolEvent::InputDelta { .. }) => None,
138 }
139}
140
141fn setup_tracing(verbose: bool) {
142 use tracing_subscriber::Layer;
143 use tracing_subscriber::filter::EnvFilter;
144 use tracing_subscriber::fmt;
145 use tracing_subscriber::layer::SubscriberExt;
146 use tracing_subscriber::util::SubscriberInitExt;
147
148 let filter = if verbose { EnvFilter::new("debug,agent=off") } else { EnvFilter::new("error,agent=off") };
149 let layer = fmt::layer().with_writer(io::stderr).with_filter(filter);
150
151 tracing_subscriber::registry().with(layer).init();
152}
153
154#[cfg(test)]
155mod tests {
156 use aether_core::events::StreamState;
157
158 use super::*;
159 use llm::ContextUsage;
160
161 #[test]
162 fn event_kind_none_for_non_output_fragments() {
163 assert_eq!(event_kind(&AgentEvent::text("id", "x", StreamState::Partial)), None);
164 assert_eq!(event_kind(&AgentEvent::thought("id", "x", StreamState::Partial)), None);
165 assert_eq!(
166 event_kind(&AgentEvent::Tool(ToolEvent::InputStarted { id: "tc1".to_string(), name: "bash".to_string() })),
167 None,
168 );
169 assert_eq!(
170 event_kind(&AgentEvent::Tool(ToolEvent::InputDelta { id: "tc1".to_string(), chunk: "x".to_string() })),
171 None,
172 );
173 }
174
175 #[test]
176 fn event_kind_turn_ended_is_filterable() {
177 assert_eq!(event_kind(&AgentEvent::turn_ended(TurnOutcome::Completed)), Some(CliEventKind::TurnEnded));
178 }
179
180 #[test]
181 fn should_emit_empty_filter_rejects_non_output_events() {
182 assert!(should_emit(&tool_call_msg(), &[]));
183 assert!(should_emit(&AgentEvent::turn_ended(TurnOutcome::failed("e")), &[]));
184 assert!(should_emit(&AgentEvent::turn_ended(TurnOutcome::Completed), &[]));
185 assert!(!should_emit(&AgentEvent::text("id", "x", StreamState::Partial), &[]));
186 assert!(!should_emit(
187 &AgentEvent::Tool(ToolEvent::InputDelta { id: "tc1".to_string(), chunk: "x".to_string() }),
188 &[],
189 ));
190 }
191
192 #[test]
193 fn should_emit_single_type_whitelist() {
194 let filter = &[CliEventKind::ToolCall];
195 assert!(should_emit(&tool_call_msg(), filter));
196 assert!(!should_emit(&tool_result_msg(), filter));
197 assert!(!should_emit(&AgentEvent::turn_ended(TurnOutcome::Completed), filter));
198 }
199
200 #[test]
201 fn should_emit_multi_type_whitelist() {
202 let filter = &[CliEventKind::ToolCall, CliEventKind::ToolResult];
203 assert!(should_emit(&tool_call_msg(), filter));
204 assert!(should_emit(&tool_result_msg(), filter));
205 assert!(!should_emit(&AgentEvent::turn_ended(TurnOutcome::Completed), filter));
206 }
207
208 #[test]
209 fn should_emit_turn_ended_respects_filter() {
210 let msg = AgentEvent::turn_ended(TurnOutcome::Completed);
211 assert!(should_emit(&msg, &[CliEventKind::TurnEnded]));
212 assert!(!should_emit(&msg, &[CliEventKind::ToolCall]));
213 }
214
215 #[test]
216 fn event_kind_covers_every_cli_event_kind() {
217 use clap::ValueEnum;
218
219 let samples = vec![
220 (AgentEvent::text("id", "x", StreamState::Complete), CliEventKind::Text),
221 (AgentEvent::thought("id", "x", StreamState::Complete), CliEventKind::Thought),
222 (tool_call_msg(), CliEventKind::ToolCall),
223 (tool_result_msg(), CliEventKind::ToolResult),
224 (
225 AgentEvent::Tool(ToolEvent::Error {
226 error: llm::ToolCallError {
227 id: "tc1".to_string(),
228 name: "bash".to_string(),
229 arguments: None,
230 error: "boom".to_string(),
231 },
232 }),
233 CliEventKind::ToolError,
234 ),
235 (
236 AgentEvent::Turn(TurnEvent::AutoContinue {
237 attempt: 1,
238 max_attempts: 3,
239 message_id: llm::MessageId::new(),
240 content: vec![],
241 }),
242 CliEventKind::AutoContinue,
243 ),
244 (
245 AgentEvent::Model(ModelEvent::Switched { previous: "a".to_string(), new: "b".to_string() }),
246 CliEventKind::ModelSwitched,
247 ),
248 (tool_progress(1.0, None, None), CliEventKind::ToolProgress),
249 (
250 AgentEvent::Context(ContextEvent::CompactionStarted {
251 compaction_id: "compaction".into(),
252 message_count: 1,
253 }),
254 CliEventKind::ContextCompactionStarted,
255 ),
256 (
257 AgentEvent::Context(ContextEvent::CompactionEnded {
258 compaction_id: "compaction".into(),
259 outcome: aether_core::events::CompactionOutcome::Completed,
260 }),
261 CliEventKind::ContextCompactionEnded,
262 ),
263 (
264 AgentEvent::Context(ContextEvent::CompactionResult {
265 compaction_id: "compaction".into(),
266 message_id: llm::MessageId::new(),
267 summary: "s".to_string(),
268 messages_removed: 1,
269 }),
270 CliEventKind::ContextCompactionResult,
271 ),
272 (usage_update(), CliEventKind::ContextUsage),
273 (
274 AgentEvent::SessionUsage(llm::testing::session_usage_event(1, llm::TokenUsage::new(1, 1))),
275 CliEventKind::SessionUsage,
276 ),
277 (AgentEvent::Context(ContextEvent::Cleared), CliEventKind::ContextCleared),
278 (AgentEvent::Turn(TurnEvent::Started { content: vec![] }), CliEventKind::TurnStarted),
279 (AgentEvent::turn_ended(TurnOutcome::Completed), CliEventKind::TurnEnded),
280 (retry_scheduled(1, 10), CliEventKind::LlmRetryScheduled),
281 (llm_call_started(0), CliEventKind::LlmCallStarted),
282 (
283 AgentEvent::Turn(TurnEvent::LlmCallEnded {
284 purpose: llm::LlmCallPurpose::Chat,
285 outcome: aether_core::events::LlmCallOutcome::Cancelled,
286 }),
287 CliEventKind::LlmCallEnded,
288 ),
289 (AgentEvent::Tool(ToolEvent::DefinitionsUpdated { tools: vec![] }), CliEventKind::ToolDefinitionsUpdated),
290 ];
291
292 for kind in CliEventKind::value_variants() {
293 assert!(samples.iter().any(|(_, k)| k == kind), "samples is missing a case for {kind:?}");
294 }
295
296 for (msg, kind) in &samples {
297 assert_eq!(event_kind(msg), Some(*kind), "event_kind disagrees for {kind:?}");
298 }
299 }
300
301 #[tokio::test]
302 async fn stream_output_turn_ended_breaks_loop_under_filter() {
303 let (tx, rx) = mpsc::channel(4);
304 tx.send(AgentEvent::turn_ended(TurnOutcome::Completed)).await.unwrap();
305 let filter = vec![CliEventKind::ToolCall];
306 let code = stream_output(rx, OutputFormat::Text, &filter).await;
307 assert_eq!(code, ExitCode::SUCCESS);
308 }
309
310 #[tokio::test]
311 async fn stream_output_failed_turn_exits_with_failure() {
312 let (tx, rx) = mpsc::channel(4);
313 tx.send(AgentEvent::turn_ended(TurnOutcome::failed("boom"))).await.unwrap();
314 let code = stream_output(rx, OutputFormat::Text, &[]).await;
315 assert_eq!(code, ExitCode::FAILURE);
316 }
317
318 fn tool_call_msg() -> AgentEvent {
319 AgentEvent::Tool(ToolEvent::Call {
320 request: llm::ToolCallRequest {
321 id: "tc1".to_string(),
322 name: "bash".to_string(),
323 arguments: "{}".to_string(),
324 },
325 })
326 }
327
328 fn tool_result_msg() -> AgentEvent {
329 AgentEvent::Tool(ToolEvent::Result {
330 result: llm::ToolCallResult {
331 id: "tc1".to_string(),
332 name: "bash".to_string(),
333 arguments: "{}".to_string(),
334 result: "ok".to_string(),
335 },
336 result_meta: None,
337 })
338 }
339
340 fn tool_progress(progress: f64, total: Option<f64>, message: Option<&str>) -> AgentEvent {
341 AgentEvent::Tool(ToolEvent::Progress {
342 request: llm::ToolCallRequest {
343 id: "tc1".to_string(),
344 name: "bash".to_string(),
345 arguments: "{}".to_string(),
346 },
347 progress,
348 total,
349 message: message.map(str::to_string),
350 })
351 }
352
353 fn retry_scheduled(attempt: u32, delay_ms: u64) -> AgentEvent {
354 AgentEvent::Turn(TurnEvent::RetryScheduled {
355 purpose: llm::LlmCallPurpose::Chat,
356 attempt,
357 max_attempts: 3,
358 delay_ms,
359 })
360 }
361
362 fn llm_call_started(attempt: u32) -> AgentEvent {
363 AgentEvent::Turn(TurnEvent::LlmCallStarted {
364 purpose: llm::LlmCallPurpose::Chat,
365 model: llm::ModelIdentity::default(),
366 display_name: "test".to_string(),
367 attempt,
368 max_attempts: 3,
369 })
370 }
371
372 fn usage_update() -> AgentEvent {
373 AgentEvent::Context(ContextEvent::UsageUpdated {
374 usage: ContextUsage {
375 input_tokens: 100_000.into(),
376 context_limit: Some(200_000.into()),
377 usage_ratio: Some(0.5),
378 },
379 })
380 }
381}