rho_coding_agent/app/
automation.rs

1use std::{
2    fmt,
3    io::{self, Read, Write},
4    num::NonZeroUsize,
5    path::PathBuf,
6    sync::Arc,
7    time::Duration,
8};
9
10use rho_sdk::{SessionOptions, UserInput};
11
12use {
13    crate::cli::{Command, OutputFormat},
14    crate::config::Config,
15    crate::credential_store::AppCredentialStore,
16    crate::diagnostics::RuntimeDiagnostics,
17    crate::herdr::{HerdrReporter, HerdrState},
18    crate::subagent::{RunState, RunStatus},
19    crate::tools::agent::BackgroundSubagents,
20    rho_providers::providers::build_automation_provider,
21};
22
23use super::{
24    agent_binding::BoundAgent,
25    automation_protocol::{write_event, JsonlAdapter, TerminalReason, WireEvent},
26    headless_run::{self, HeadlessRunDeps, HostInputResponder},
27    policy::AppPolicy,
28    runtime_builder::{
29        build_runtime_with_max_steps, configured_context_window, RuntimeBuildOptions,
30    },
31    sdk_config::SdkBootstrapOptions,
32    tools_prompt::{assemble_tools_and_prompt, ToolsAndPrompt, ToolsAndPromptOptions},
33};
34
35/// Error returned after an automation run has cleaned up and selected a stable exit code.
36#[derive(Debug)]
37pub struct AutomationExit {
38    code: u8,
39    reason: TerminalReason,
40    message: String,
41}
42
43impl AutomationExit {
44    pub(super) fn new(code: u8, reason: TerminalReason, message: impl Into<String>) -> Self {
45        Self {
46            code,
47            reason,
48            message: message.into(),
49        }
50    }
51
52    /// Returns the documented process exit code for this automation result.
53    pub fn exit_code(&self) -> u8 {
54        self.code
55    }
56
57    fn reason(&self) -> TerminalReason {
58        self.reason
59    }
60}
61
62impl fmt::Display for AutomationExit {
63    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
64        formatter.write_str(&self.message)
65    }
66}
67
68impl std::error::Error for AutomationExit {}
69
70/// Error returned after an automation run handles an interrupt and completes cleanup.
71#[derive(Debug)]
72pub struct AutomationInterrupted {
73    signal: ShutdownSignal,
74}
75
76impl AutomationInterrupted {
77    fn new(signal: ShutdownSignal) -> Self {
78        Self { signal }
79    }
80
81    /// Returns the conventional process exit code for the received signal.
82    pub fn exit_code(&self) -> u8 {
83        self.signal.exit_code()
84    }
85}
86
87impl fmt::Display for AutomationInterrupted {
88    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
89        write!(formatter, "rho run interrupted by {}", self.signal)
90    }
91}
92
93impl std::error::Error for AutomationInterrupted {}
94
95#[derive(Clone, Copy, Debug)]
96enum ShutdownSignal {
97    Interrupt,
98    Terminate,
99}
100
101impl ShutdownSignal {
102    fn exit_code(self) -> u8 {
103        match self {
104            Self::Interrupt => 130,
105            Self::Terminate => 143,
106        }
107    }
108}
109
110impl fmt::Display for ShutdownSignal {
111    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
112        match self {
113            Self::Interrupt => formatter.write_str("SIGINT"),
114            Self::Terminate => formatter.write_str("SIGTERM"),
115        }
116    }
117}
118
119#[derive(Debug)]
120struct SubagentCancelled;
121
122impl fmt::Display for SubagentCancelled {
123    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
124        formatter.write_str("subagent cancellation requested")
125    }
126}
127
128impl std::error::Error for SubagentCancelled {}
129
130pub(super) struct Startup<'a> {
131    pub config: &'a Config,
132    pub config_path: PathBuf,
133    pub cwd: PathBuf,
134    pub no_system_prompt: bool,
135    pub no_tools: bool,
136    pub no_subagents: bool,
137    pub usage_purpose: &'static str,
138    pub parent_session_id: Option<rho_sdk::SessionId>,
139    pub agent: BoundAgent,
140    pub output_file: Option<PathBuf>,
141    pub output: OutputFormat,
142    pub max_steps: Option<NonZeroUsize>,
143    pub timeout: Option<Duration>,
144    pub diagnostics: RuntimeDiagnostics,
145    pub herdr: HerdrReporter,
146    pub host_input: Option<Arc<dyn HostInputResponder>>,
147    /// Non-blocking parent notices for background delegated Rho agents.
148    pub notice_poster: Option<Arc<dyn super::subagent_messaging::NoticePoster>>,
149    /// Receives the live steering port once the Rho session starts.
150    pub steering_slot: Option<super::subagent_messaging::SteeringSlot>,
151    pub approval_session: Option<rho_sdk::ApprovalSession>,
152    pub hook_host_labels: rho_sdk::hooks::HookHostLabels,
153}
154
155pub(super) fn prompt_for_command(command: &Option<Command>) -> anyhow::Result<Option<String>> {
156    match command {
157        Some(Command::Run { prompt, stdin, .. }) => {
158            prompt_from_stdin(prompt.clone(), *stdin).map(Some)
159        }
160        Some(
161            Command::Attach { .. }
162            | Command::Login { .. }
163            | Command::CredentialStore { .. }
164            | Command::Sessions { .. }
165            | Command::Mcp { .. }
166            | Command::Plugins { .. }
167            | Command::Workflow { .. }
168            | Command::WorkflowPlannerWorker
169            | Command::Update,
170        )
171        | None => Ok(None),
172    }
173}
174
175pub(super) fn emit_startup_failure(message: impl Into<String>) -> anyhow::Result<()> {
176    let mut adapter = JsonlAdapter::new();
177    let event = adapter.failed(TerminalReason::ConfigurationError, message.into(), None);
178    emit(event)
179}
180
181pub(super) async fn run(prompt_text: String, startup: Startup<'_>) -> anyhow::Result<()> {
182    let mut jsonl = (startup.output == OutputFormat::Jsonl).then(JsonlAdapter::new);
183    let deadline = startup
184        .timeout
185        .map(|timeout| tokio::time::Instant::now() + timeout);
186    // The reporter exists before anything that can fail, so a parent process
187    // watching the output file always sees a terminal state, including startup failures.
188    let reporter_result = startup
189        .output_file
190        .as_ref()
191        .map(|path| {
192            RunReporter::new(
193                path.clone(),
194                RunArtifactIdentity {
195                    agent_id: startup.agent.id().to_string(),
196                    agent_fingerprint: startup.agent.fingerprint().to_string(),
197                    provider: startup.config.provider.clone(),
198                    model: startup.config.model.clone(),
199                    runtime: crate::agent::AgentRuntime::Rho,
200                },
201                startup.cwd.clone(),
202                &prompt_text,
203                /* stream_output */ startup.output == OutputFormat::Text,
204                None,
205            )
206        })
207        .transpose();
208    let mut reporter = match reporter_result {
209        Ok(reporter) => reporter,
210        Err(error) => {
211            emit_failure(&mut jsonl, TerminalReason::OutputError, &error)?;
212            return Err(
213                AutomationExit::new(1, TerminalReason::OutputError, error.to_string()).into(),
214            );
215        }
216    };
217
218    let cancellation = rho_tools::cancellation::RunCancellation::default();
219    let (result, timed_out) = if let Some(deadline) = deadline {
220        let future = run_session_with_output(
221            prompt_text,
222            &startup,
223            reporter.as_mut(),
224            Some(cancellation.clone()),
225            jsonl.as_mut(),
226        );
227        tokio::pin!(future);
228        tokio::select! {
229            result = &mut future => (result, false),
230            () = tokio::time::sleep_until(deadline) => {
231                cancellation.cancel();
232                (future.await, true)
233            }
234        }
235    } else {
236        (
237            run_session_with_output(
238                prompt_text,
239                &startup,
240                reporter.as_mut(),
241                None,
242                jsonl.as_mut(),
243            )
244            .await,
245            false,
246        )
247    };
248    let terminal = classify_run_terminal(result, timed_out);
249    if let Some(reporter) = reporter.as_mut() {
250        reporter.finish_terminal(&terminal);
251    }
252    emit_and_exit_terminal(terminal, &mut jsonl, reporter.is_some())
253}
254
255fn write_text_answer(answer: &rho_sdk::RunOutcome, has_reporter: bool) -> anyhow::Result<()> {
256    let result = (|| -> io::Result<()> {
257        let mut stdout = io::stdout().lock();
258        if has_reporter {
259            writeln!(stdout, "\n[subagent run complete]")?;
260        } else {
261            writeln!(stdout, "{}", answer.text())?;
262        }
263        stdout.flush()
264    })();
265    result.map_err(|error| {
266        AutomationExit::new(
267            1,
268            TerminalReason::OutputError,
269            format!("could not write output: {error}"),
270        )
271        .into()
272    })
273}
274
275pub(super) fn emit(event: WireEvent) -> anyhow::Result<()> {
276    let mut stdout = io::stdout().lock();
277    write_event(&mut stdout, &event).map_err(|error| {
278        AutomationExit::new(
279            1,
280            TerminalReason::OutputError,
281            format!("could not write JSONL output: {error}"),
282        )
283        .into()
284    })
285}
286
287fn emit_stopped(adapter: &mut Option<JsonlAdapter>, reason: TerminalReason) -> anyhow::Result<()> {
288    if let Some(adapter) = adapter.as_mut() {
289        let text = adapter.partial_text();
290        let event = adapter.stopped(reason, text);
291        emit(event)?;
292    }
293    Ok(())
294}
295
296fn emit_failure(
297    adapter: &mut Option<JsonlAdapter>,
298    reason: TerminalReason,
299    error: &anyhow::Error,
300) -> anyhow::Result<()> {
301    if let Some(adapter) = adapter.as_mut() {
302        let text = adapter.partial_text();
303        let message = terminal_error_message(reason, error);
304        let event = adapter.failed(reason, message, text);
305        emit(event)?;
306    }
307    Ok(())
308}
309
310const MAX_STEPS_MESSAGE: &str = "rho run reached its model-step limit";
311const TIMEOUT_MESSAGE: &str = "rho run timed out";
312
313/// Single classification of a finished automation session before reporter,
314/// JSONL/text emission, and process exit share one decision.
315enum RunTerminal {
316    Completed(rho_sdk::RunOutcome),
317    MaxSteps(rho_sdk::RunOutcome),
318    Timeout,
319    Failed(anyhow::Error),
320}
321
322fn classify_run_terminal(
323    result: anyhow::Result<rho_sdk::RunOutcome>,
324    timed_out: bool,
325) -> RunTerminal {
326    if timed_out {
327        return RunTerminal::Timeout;
328    }
329    match result {
330        Ok(answer) if answer.stop_reason() == rho_sdk::StopReason::MaxSteps => {
331            RunTerminal::MaxSteps(answer)
332        }
333        Ok(answer) => RunTerminal::Completed(answer),
334        Err(error) => RunTerminal::Failed(error),
335    }
336}
337
338fn emit_and_exit_terminal(
339    terminal: RunTerminal,
340    jsonl: &mut Option<JsonlAdapter>,
341    has_reporter: bool,
342) -> anyhow::Result<()> {
343    match terminal {
344        RunTerminal::Timeout => {
345            emit_stopped(jsonl, TerminalReason::Timeout)?;
346            Err(AutomationExit::new(124, TerminalReason::Timeout, TIMEOUT_MESSAGE).into())
347        }
348        RunTerminal::MaxSteps(answer) => {
349            if let Some(adapter) = jsonl.as_mut() {
350                let text = (!answer.text().is_empty()).then(|| answer.text().into());
351                let event = adapter.stopped(TerminalReason::MaxSteps, text);
352                emit(event)?;
353            } else {
354                write_text_answer(&answer, has_reporter)?;
355            }
356            Err(AutomationExit::new(124, TerminalReason::MaxSteps, MAX_STEPS_MESSAGE).into())
357        }
358        RunTerminal::Completed(answer) => {
359            if let Some(adapter) = jsonl.as_mut() {
360                let event = adapter.completed(answer.text().into());
361                emit(event)?;
362            } else {
363                write_text_answer(&answer, has_reporter)?;
364            }
365            Ok(())
366        }
367        RunTerminal::Failed(error) => {
368            let (reason, code) = classify_error(&error);
369            if reason == TerminalReason::Interrupted {
370                emit_stopped(jsonl, reason)?;
371            } else if reason != TerminalReason::OutputError {
372                emit_failure(jsonl, reason, &error)?;
373            }
374            let message = terminal_error_message(reason, &error);
375            if error.is::<AutomationInterrupted>() {
376                return Err(error);
377            }
378            Err(AutomationExit::new(code, reason, message).into())
379        }
380    }
381}
382
383/// Builds the human-readable terminal message for a classified automation error.
384///
385/// Reason codes stay stable machine labels. The message carries actionable detail
386/// except for authentication failures, which stay generic so credentials and
387/// token material never leave the process through stdout, stderr, or JSONL.
388fn terminal_error_message(reason: TerminalReason, error: &anyhow::Error) -> String {
389    match reason {
390        TerminalReason::Authentication => "authentication failed".to_string(),
391        TerminalReason::ProviderError
392        | TerminalReason::ToolHostError
393        | TerminalReason::ConfigurationError
394        | TerminalReason::OutputError
395        | TerminalReason::OtherError
396        | TerminalReason::Interrupted
397        | TerminalReason::MaxSteps
398        | TerminalReason::Timeout
399        | TerminalReason::Completed => error.to_string(),
400    }
401}
402
403fn classify_error(error: &anyhow::Error) -> (TerminalReason, u8) {
404    if let Some(interrupted) = error.downcast_ref::<AutomationInterrupted>() {
405        return (TerminalReason::Interrupted, interrupted.exit_code());
406    }
407    if let Some(exit) = error.downcast_ref::<AutomationExit>() {
408        return (exit.reason(), exit.exit_code());
409    }
410    for cause in error.chain() {
411        if let Some(error) = cause.downcast_ref::<rho_sdk::Error>() {
412            return match error {
413                rho_sdk::Error::Authentication { .. } => (TerminalReason::Authentication, 1),
414                rho_sdk::Error::Provider(provider)
415                    if provider.kind() == rho_sdk::ProviderErrorKind::Authentication =>
416                {
417                    (TerminalReason::Authentication, 1)
418                }
419                rho_sdk::Error::Provider(_) => (TerminalReason::ProviderError, 1),
420                rho_sdk::Error::Tool(_) => (TerminalReason::ToolHostError, 1),
421                rho_sdk::Error::InvalidConfiguration { .. } => {
422                    (TerminalReason::ConfigurationError, 2)
423                }
424                _ => (TerminalReason::OtherError, 1),
425            };
426        }
427        if let Some(error) = cause.downcast_ref::<rho_providers::model::ModelError>() {
428            use rho_providers::model::ModelError;
429            return match error {
430                ModelError::MissingCredentials(_) | ModelError::Credentials(_) => {
431                    (TerminalReason::Authentication, 1)
432                }
433                ModelError::UnsupportedReasoning { .. } | ModelError::UnsupportedProvider(_) => {
434                    (TerminalReason::ConfigurationError, 2)
435                }
436                _ => (TerminalReason::ProviderError, 1),
437            };
438        }
439    }
440    (TerminalReason::OtherError, 1)
441}
442
443pub(crate) async fn run_session(
444    prompt_text: String,
445    startup: &Startup<'_>,
446    reporter: Option<&mut RunReporter>,
447    cancellation: Option<rho_tools::cancellation::RunCancellation>,
448) -> anyhow::Result<rho_sdk::RunOutcome> {
449    run_session_with_output(prompt_text, startup, reporter, cancellation, None).await
450}
451
452async fn run_session_with_output(
453    prompt_text: String,
454    startup: &Startup<'_>,
455    reporter: Option<&mut RunReporter>,
456    cancellation: Option<rho_tools::cancellation::RunCancellation>,
457    mut jsonl: Option<&mut JsonlAdapter>,
458) -> anyhow::Result<rho_sdk::RunOutcome> {
459    let sdk_options = SdkBootstrapOptions::from_config(startup.config, &startup.cwd)?;
460    let credentials = rho_providers::auth::provider_credentials::ApplicationCredentialSource::new(
461        Arc::new(AppCredentialStore),
462    );
463    let provider = build_automation_provider(sdk_options.provider, &credentials)?;
464    let workspace_root = sdk_options.workspace.root.clone();
465    let workspace = sdk_options.workspace.build_workspace()?;
466    let ToolsAndPrompt {
467        tools: mut tool_set,
468        system_prompt,
469        ..
470    } = assemble_tools_and_prompt(ToolsAndPromptOptions {
471        config: startup.config,
472        config_path: startup.config_path.clone(),
473        cwd: &startup.cwd,
474        no_system_prompt: startup.no_system_prompt,
475        no_tools: startup.no_tools,
476        no_subagents: startup.no_subagents,
477        // Automation keeps questionnaire capability when the agent exposes it.
478        questionnaire_enabled: true,
479        // An automation run can only show a server's question when the caller
480        // supplied a responder for host input; without one the run would fail
481        // on the first question instead of declining it.
482        mcp_elicitation: match startup.host_input {
483            Some(_) => crate::tools::mcp::McpElicitationSupport::Available,
484            None => crate::tools::mcp::McpElicitationSupport::Unavailable,
485        },
486        // Automation binds no model for sampling, so it never declares the
487        // capability and rejects any request that arrives anyway.
488        mcp_sampling: crate::app::tools_prompt::McpSamplingSupport::Unavailable,
489        // Do not block automation startup on models.dev; use whatever cache is warm.
490        await_catalog_names: false,
491        background_subagents: BackgroundSubagents::Disabled,
492        diagnostics: &startup.diagnostics,
493        agent: &startup.agent,
494    })
495    .await?;
496    if let Some(poster) = startup.notice_poster.clone() {
497        tool_set.add_bundle(crate::tools::message_parent_bundle(poster));
498    }
499
500    let context_window = configured_context_window(startup.config);
501    let compaction = sdk_options.runtime.compaction.clone();
502    startup.diagnostics.update_compaction_config(&compaction);
503    let usage_recording = crate::usage::default_recording().await;
504    let hooks = crate::hooks::start_for_cwd(&workspace_root);
505    if let Some(hooks) = hooks.as_ref() {
506        startup.diagnostics.attach_hooks(hooks);
507    }
508    let startup_result: anyhow::Result<_> = async {
509        let runtime = build_runtime_with_max_steps(
510            RuntimeBuildOptions {
511                provider,
512                tools: tool_set.tools(),
513                workspace,
514                workspace_policy: AppPolicy::for_mode(startup.config.permission_mode),
515                approval_session: startup.approval_session.clone(),
516                system_prompt,
517                reasoning: sdk_options.runtime.reasoning,
518                service_tier: sdk_options.runtime.service_tier,
519                compaction,
520                context_window,
521                usage_purpose: startup.usage_purpose,
522                usage_parent_session_id: startup.parent_session_id.clone(),
523                usage_recording,
524                hook_host_labels: startup.hook_host_labels.clone(),
525                hooks: hooks.as_ref(),
526            },
527            startup.max_steps,
528        )?;
529        let session = match runtime.session(SessionOptions::default()).await {
530            Ok(session) => session,
531            Err(error) => {
532                runtime.shutdown();
533                return Err(error.into());
534            }
535        };
536        anyhow::Ok((runtime, session))
537    }
538    .await;
539    let (runtime, session) = match startup_result {
540        Ok(startup) => startup,
541        Err(error) => {
542            if let Some(hooks) = hooks {
543                hooks.shutdown(crate::hooks::DRAIN_GRACE).await;
544            }
545            tool_set.shutdown().await;
546            return Err(error);
547        }
548    };
549    if let Some(advisor) = tool_set.advisor() {
550        advisor.bind_session(session.clone());
551    }
552    if let Some(adapter) = jsonl.as_deref_mut() {
553        adapter.set_run_context(session.id(), &workspace_root);
554    }
555    startup
556        .herdr
557        .report_state(HerdrState::Working, None, None)
558        .await;
559    let result = complete_run(
560        &session,
561        prompt_text,
562        HeadlessRunDeps {
563            reporter,
564            external_cancellation: cancellation,
565            jsonl,
566            host_input: startup.host_input.as_deref(),
567        },
568        startup.steering_slot.clone(),
569    )
570    .await;
571
572    let session_hooks = runtime.hooks();
573    let session_id = session.id().clone();
574    match &result {
575        Ok(_) => {
576            session_hooks.session_completed(&session_id, /* completed_runs */ 1)
577        }
578        Err(error) => session_hooks.session_failed(
579            &session_id,
580            rho_sdk::hooks::HookSessionFailureKind::RunFailed,
581            &error.to_string(),
582        ),
583    }
584    runtime.shutdown();
585    drop(session);
586    drop(runtime);
587    if let Some(hooks) = hooks {
588        hooks.shutdown(crate::hooks::DRAIN_GRACE).await;
589    }
590    tool_set.shutdown().await;
591    startup
592        .herdr
593        .report_state(HerdrState::Idle, None, None)
594        .await;
595    startup.herdr.release().await;
596
597    result
598}
599
600async fn complete_run(
601    session: &rho_sdk::Session,
602    prompt_text: String,
603    dependencies: HeadlessRunDeps<'_>,
604    steering_slot: Option<super::subagent_messaging::SteeringSlot>,
605) -> anyhow::Result<rho_sdk::RunOutcome> {
606    let HeadlessRunDeps {
607        reporter,
608        external_cancellation,
609        jsonl,
610        host_input,
611    } = dependencies;
612    let mut run = session.start(UserInput::text(prompt_text)).await?;
613    if let Some(slot) = steering_slot {
614        slot.publish(run.steering_handle());
615    }
616    let cancellation = run.cancellation_handle();
617    let external_cancellation = external_cancellation.unwrap_or_default();
618    tokio::select! {
619        outcome = headless_run::drive(&mut run, reporter, jsonl, host_input) => outcome,
620        signal = shutdown_signal() => {
621            let signal = signal?;
622            cancellation.cancel();
623            let _ = run.outcome().await;
624            Err(AutomationInterrupted::new(signal).into())
625        }
626        () = external_cancellation.cancelled() => {
627            cancellation.cancel();
628            let _ = run.outcome().await;
629            Err(SubagentCancelled.into())
630        }
631    }
632}
633
634pub(crate) use crate::run_artifacts::RunArtifactIdentity;
635
636/// Maintains the `--output-file` status contract for subagent runs and
637/// streams progress to stdout so a watching pane shows live activity.
638pub(crate) struct RunReporter {
639    sink: crate::run_artifacts::RunArtifactSink,
640    adapter: crate::tui::event_adapter::SdkEventAdapter,
641    stream_output: bool,
642}
643
644impl RunReporter {
645    pub(crate) fn new(
646        path: PathBuf,
647        identity: RunArtifactIdentity,
648        cwd: PathBuf,
649        prompt: &str,
650        stream_output: bool,
651        status_tx: Option<tokio::sync::watch::Sender<RunStatus>>,
652    ) -> anyhow::Result<Self> {
653        let sink = crate::run_artifacts::RunArtifactSink::open(path, &identity, prompt, status_tx)?;
654        Ok(Self {
655            sink,
656            adapter: crate::tui::event_adapter::SdkEventAdapter::new(cwd),
657            stream_output,
658        })
659    }
660
661    /// Resume after the executor already wrote the Starting boundary.
662    pub(crate) fn continue_from(
663        path: PathBuf,
664        started_status: RunStatus,
665        cwd: PathBuf,
666        prompt: &str,
667        stream_output: bool,
668        status_tx: Option<tokio::sync::watch::Sender<RunStatus>>,
669    ) -> anyhow::Result<Self> {
670        let sink = crate::run_artifacts::RunArtifactSink::continue_from(
671            path,
672            started_status,
673            prompt,
674            status_tx,
675        )?;
676        Ok(Self {
677            sink,
678            adapter: crate::tui::event_adapter::SdkEventAdapter::new(cwd),
679            stream_output,
680        })
681    }
682
683    pub(super) fn on_event(&mut self, event: &rho_sdk::RunEvent) {
684        use rho_sdk::RunEvent;
685
686        let attachments = crate::tui::translate_run_event(&mut self.adapter, event);
687        for attachment in attachments {
688            // Reasoning is deliberately kept out of `last_text`: the status file
689            // carries the answer, not the thinking.
690            if let crate::run_artifacts::AttachmentEvent::AssistantTextDelta(text) = &attachment {
691                if !text.is_empty() {
692                    self.sink.append_last_text(text);
693                }
694            }
695            self.sink.record_attachment(attachment);
696        }
697        match event {
698            RunEvent::StepStarted { step, .. } => {
699                self.sink.status.state = RunState::Running;
700                self.sink.status.turns = *step as u64;
701                self.sink.publish();
702            }
703            RunEvent::ToolStarted { name, .. } => {
704                self.sink.status.last_activity = Some(format!("tool: {name}"));
705                self.stream(&format!("\n[tool] {name}\n"));
706                self.sink.publish();
707            }
708            RunEvent::HostInputRequested { request }
709            | RunEvent::ToolHostInputRequested { request, .. } => {
710                self.sink.status.last_activity =
711                    Some(format!("waiting for questionnaire: {}", request.title()));
712                self.sink.publish();
713            }
714            RunEvent::AssistantTextDelta { text } => {
715                self.sink.status.last_activity = Some("assistant text".into());
716                self.stream(text);
717                // Attachment path already published throttled when translated.
718            }
719            RunEvent::ProviderStreamReset { .. } => {
720                self.sink.status.last_activity = Some("retrying provider response".into());
721                self.sink.status.last_text = None;
722                self.stream("\n[provider response discarded; retrying]\n");
723                self.sink.publish();
724            }
725            RunEvent::UsageUpdated { usage } => {
726                self.sink.status.input_tokens = usage.total_input_tokens();
727                self.sink.status.output_tokens = usage.output_tokens;
728            }
729            _ => {}
730        }
731    }
732
733    #[cfg(test)]
734    pub(crate) fn status(&self) -> &RunStatus {
735        &self.sink.status
736    }
737
738    pub(super) fn write(&mut self) {
739        self.sink.publish();
740    }
741
742    pub(crate) fn finish(&mut self, result: &anyhow::Result<rho_sdk::RunOutcome>) {
743        match result {
744            Ok(outcome) => {
745                let usage = outcome.usage();
746                self.sink.status.input_tokens = usage.total_input_tokens();
747                self.sink.status.output_tokens = usage.output_tokens;
748                self.sink.finish_ok(Some(outcome.text().to_string()));
749            }
750            Err(error)
751                if error.is::<AutomationInterrupted>()
752                    || error.downcast_ref::<AutomationExit>().is_some_and(|exit| {
753                        matches!(
754                            exit.reason(),
755                            TerminalReason::MaxSteps | TerminalReason::Timeout
756                        )
757                    })
758                    || error.is::<SubagentCancelled>() =>
759            {
760                self.sink.finish_stopped("stopped");
761            }
762            Err(error) => {
763                self.sink.finish_error(format!("{error:#}"));
764            }
765        }
766    }
767
768    fn finish_terminal(&mut self, terminal: &RunTerminal) {
769        match terminal {
770            RunTerminal::Completed(outcome) => {
771                let usage = outcome.usage();
772                self.sink.status.input_tokens = usage.total_input_tokens();
773                self.sink.status.output_tokens = usage.output_tokens;
774                self.sink.finish_ok(Some(outcome.text().to_string()));
775            }
776            RunTerminal::MaxSteps(_) | RunTerminal::Timeout => {
777                self.sink.finish_stopped("stopped");
778            }
779            RunTerminal::Failed(error)
780                if error.is::<AutomationInterrupted>() || error.is::<SubagentCancelled>() =>
781            {
782                self.sink.finish_stopped("stopped");
783            }
784            RunTerminal::Failed(error) => {
785                self.sink.finish_error(format!("{error:#}"));
786            }
787        }
788    }
789
790    fn stream(&self, text: &str) {
791        if !self.stream_output {
792            return;
793        }
794        let mut stdout = io::stdout().lock();
795        let _ = stdout.write_all(text.as_bytes());
796        let _ = stdout.flush();
797    }
798}
799
800#[cfg(unix)]
801async fn shutdown_signal() -> io::Result<ShutdownSignal> {
802    use tokio::signal::unix::{signal, SignalKind};
803
804    let mut interrupt = signal(SignalKind::interrupt())?;
805    let mut terminate = signal(SignalKind::terminate())?;
806    tokio::select! {
807        _ = interrupt.recv() => Ok(ShutdownSignal::Interrupt),
808        _ = terminate.recv() => Ok(ShutdownSignal::Terminate),
809    }
810}
811
812#[cfg(not(unix))]
813async fn shutdown_signal() -> io::Result<ShutdownSignal> {
814    tokio::signal::ctrl_c().await?;
815    Ok(ShutdownSignal::Interrupt)
816}
817
818fn prompt_from_stdin(parts: Vec<String>, read_stdin: bool) -> anyhow::Result<String> {
819    if !read_stdin && crate::stdio::stdin_is_redirected() {
820        anyhow::bail!(
821            "stdin is redirected but --stdin was not set; pass --stdin to include piped input"
822        );
823    }
824    prompt_from_reader(parts, read_stdin, &mut io::stdin())
825}
826
827fn prompt_from_reader(
828    parts: Vec<String>,
829    read_stdin: bool,
830    stdin: &mut impl Read,
831) -> anyhow::Result<String> {
832    let mut chunks = Vec::new();
833    let inline = parts.join(" ").trim().to_string();
834    if !inline.is_empty() {
835        chunks.push(inline);
836    }
837    if read_stdin {
838        let mut buffer = String::new();
839        stdin.read_to_string(&mut buffer)?;
840        let buffer = buffer.trim().to_string();
841        if !buffer.is_empty() {
842            chunks.push(buffer);
843        }
844    }
845
846    let prompt = chunks.join("\n\n");
847    if prompt.is_empty() {
848        anyhow::bail!("rho run requires a prompt argument or --stdin");
849    }
850    Ok(prompt)
851}
852
853#[cfg(test)]
854#[path = "automation_tests.rs"]
855mod tests;
rho_coding_agent/app/automation.rs

rho_coding_agent/app/
automation.rs
