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lash_core/session/
execution_context.rs

1use std::sync::Arc;
2
3use tokio::sync::mpsc::Sender;
4use tokio_util::sync::CancellationToken;
5
6use crate::tool_dispatch::ToolDispatchContext;
7use crate::{TurnActivity, TurnActivityId, TurnEvent};
8
9#[derive(Clone)]
10pub struct RuntimeExecutionContext<'run> {
11    pub(super) session_id: String,
12    pub(super) dispatch: Arc<ToolDispatchContext<'run>>,
13    process_env_store: Arc<dyn crate::ProcessExecutionEnvStore>,
14    attachment_store: Arc<dyn crate::AttachmentStore>,
15    chronological_projection: Arc<crate::ChronologicalProjection>,
16    protocol_extension: Option<crate::ProtocolTurnExtensionHandle>,
17    turn_context: crate::TurnContext,
18    execution_env_spec: crate::ProcessExecutionEnvSpec,
19    process_originator: Option<crate::ProcessOriginator>,
20    pub(super) runtime_process_id: Option<String>,
21    pub(super) process_event_context: Option<RuntimeExecutionProcessEventContext>,
22    process_env_ref: Option<crate::ProcessExecutionEnvRef>,
23    process_wake_target: Option<crate::SessionScope>,
24    pub(super) parent_invocation: Option<crate::RuntimeInvocation>,
25    turn_phase_probe: Option<Arc<dyn crate::runtime::RuntimeTurnPhaseProbe>>,
26    pub(super) turn_event_tx: Option<Sender<TurnActivity>>,
27    pub(super) cancellation_token: Option<CancellationToken>,
28    /// Process ids started by THIS execution context. Possession of a handle
29    /// the run itself created is sufficient capability to await/cancel it —
30    /// run-local children are not session handle grants (the ephemeral
31    /// execution scope must never appear in durable grant state).
32    started_process_ids: Arc<std::sync::Mutex<std::collections::HashSet<String>>>,
33}
34
35#[derive(Clone)]
36pub(super) struct RuntimeExecutionProcessEventContext {
37    pub process_id: String,
38    pub registry: Arc<dyn crate::ProcessRegistry>,
39    pub store: Option<Arc<dyn crate::RuntimePersistence>>,
40    pub session_store_factory: Option<Arc<dyn crate::SessionStoreFactory>>,
41    pub queued_work_poke: Option<crate::QueuedWorkPoke>,
42}
43
44impl<'run> RuntimeExecutionContext<'run> {
45    pub(crate) fn drain_tool_trigger_outcomes(
46        &self,
47    ) -> Result<Vec<crate::tool_dispatch::ToolTriggerEffectOutcome>, crate::PluginError> {
48        self.dispatch
49            .trigger_outcomes
50            .drain()
51            .map_err(crate::PluginError::Session)
52    }
53
54    pub(super) fn process_scope(
55        &self,
56        parent_invocation: Option<crate::RuntimeInvocation>,
57    ) -> crate::ProcessOpScope<'_> {
58        crate::ProcessOpScope::new(self.dispatch.effect_controller.scoped())
59            .with_parent_invocation(parent_invocation)
60            .with_agent_frame_id(Some(self.dispatch.agent_frame_id.clone()))
61    }
62
63    #[allow(
64        clippy::too_many_arguments,
65        reason = "code execution bridge carries explicit per-turn runtime dependencies"
66    )]
67    pub(crate) fn new(
68        session_id: String,
69        dispatch: Arc<ToolDispatchContext<'run>>,
70        process_env_store: Arc<dyn crate::ProcessExecutionEnvStore>,
71        attachment_store: Arc<dyn crate::AttachmentStore>,
72        chronological_projection: Arc<crate::ChronologicalProjection>,
73        protocol_extension: Option<crate::ProtocolTurnExtensionHandle>,
74        turn_context: crate::TurnContext,
75    ) -> Self {
76        Self {
77            session_id,
78            dispatch,
79            process_env_store,
80            attachment_store,
81            chronological_projection,
82            protocol_extension,
83            turn_context,
84            execution_env_spec: crate::ProcessExecutionEnvSpec::new(
85                crate::PluginOptions::default(),
86                crate::SessionPolicy::default(),
87            ),
88            process_originator: None,
89            runtime_process_id: None,
90            process_event_context: None,
91            started_process_ids: Arc::default(),
92            process_env_ref: None,
93            process_wake_target: None,
94            parent_invocation: None,
95            turn_phase_probe: None,
96            turn_event_tx: None,
97            cancellation_token: None,
98        }
99    }
100
101    pub fn session_id(&self) -> &str {
102        &self.session_id
103    }
104
105    pub fn execution_scope_id(&self) -> String {
106        self.dispatch
107            .effect_controller
108            .scoped()
109            .scope_id()
110            .to_string()
111    }
112
113    pub fn session_scope(&self) -> crate::SessionScope {
114        self.dispatch
115            .agent_frame_id
116            .as_str()
117            .is_empty()
118            .then(|| crate::SessionScope::new(self.session_id.clone()))
119            .unwrap_or_else(|| {
120                crate::SessionScope::for_agent_frame(
121                    self.session_id.clone(),
122                    self.dispatch.agent_frame_id.clone(),
123                )
124            })
125    }
126
127    pub fn trigger_store(&self) -> Option<Arc<dyn crate::TriggerStore>> {
128        self.dispatch
129            .trigger_router
130            .as_ref()
131            .map(crate::TriggerRouter::store)
132    }
133
134    pub fn trigger_registration_originator(&self) -> crate::ProcessOriginator {
135        self.process_originator
136            .clone()
137            .unwrap_or_else(|| crate::ProcessOriginator::session(self.session_scope()))
138    }
139
140    pub fn trigger_registration_wake_target(&self) -> Option<crate::SessionScope> {
141        self.process_wake_target
142            .clone()
143            .or_else(|| Some(self.session_scope()))
144    }
145
146    pub fn attachment_store(&self) -> Arc<dyn crate::AttachmentStore> {
147        Arc::clone(&self.attachment_store)
148    }
149
150    pub fn process_env_store(&self) -> Arc<dyn crate::ProcessExecutionEnvStore> {
151        Arc::clone(&self.process_env_store)
152    }
153
154    pub fn chronological_projection(&self) -> Arc<crate::ChronologicalProjection> {
155        Arc::clone(&self.chronological_projection)
156    }
157
158    pub fn protocol_extension<T: 'static>(&self) -> Option<&T> {
159        self.protocol_extension
160            .as_ref()
161            .and_then(|extension| extension.as_any().downcast_ref::<T>())
162    }
163
164    pub fn turn_context(&self) -> &crate::TurnContext {
165        &self.turn_context
166    }
167
168    pub fn tool_catalog(&self) -> Arc<crate::ToolCatalog> {
169        Arc::clone(&self.dispatch.tool_catalog)
170    }
171
172    pub(crate) fn session_graph_service(&self) -> &dyn crate::plugin::SessionGraphService {
173        self.dispatch.session_graph.as_ref()
174    }
175
176    pub(super) async fn emit_turn_activity(
177        &self,
178        correlation_id: TurnActivityId,
179        event: TurnEvent,
180    ) {
181        if let Some(tx) = &self.turn_event_tx {
182            let _ = tx.send(TurnActivity::new(correlation_id, event)).await;
183        }
184    }
185
186    pub(crate) fn with_turn_event_sender(mut self, turn_event_tx: Sender<TurnActivity>) -> Self {
187        self.turn_event_tx = Some(turn_event_tx);
188        self
189    }
190
191    pub(crate) fn with_parent_invocation(mut self, metadata: crate::RuntimeInvocation) -> Self {
192        self.parent_invocation = Some(metadata);
193        self
194    }
195
196    pub(crate) fn with_execution_env_spec(
197        mut self,
198        execution_env_spec: crate::ProcessExecutionEnvSpec,
199    ) -> Self {
200        self.execution_env_spec = execution_env_spec;
201        self
202    }
203
204    pub(crate) fn with_process_registration_context(
205        mut self,
206        registration: &crate::ProcessRegistration,
207    ) -> Self {
208        self.process_originator = Some(registration.provenance.originator.clone());
209        self.runtime_process_id = Some(registration.id.clone());
210        self.process_env_ref = registration.env_ref.clone();
211        self.process_wake_target = registration.wake_target.clone();
212        self
213    }
214
215    pub(crate) fn with_process_event_context(
216        mut self,
217        process_id: impl Into<String>,
218        registry: Arc<dyn crate::ProcessRegistry>,
219        store: Option<Arc<dyn crate::RuntimePersistence>>,
220        session_store_factory: Option<Arc<dyn crate::SessionStoreFactory>>,
221        queued_work_poke: Option<crate::QueuedWorkPoke>,
222    ) -> Self {
223        self.process_event_context = Some(RuntimeExecutionProcessEventContext {
224            process_id: process_id.into(),
225            registry,
226            store,
227            session_store_factory,
228            queued_work_poke,
229        });
230        self
231    }
232
233    /// Spawn provenance for children started by this context, present only
234    /// when this context executes a process: children inherit the chain's
235    /// originator and wake target instead of the ephemeral execution scope.
236    pub(super) fn record_started_process(&self, process_id: &str) {
237        self.started_process_ids
238            .lock()
239            .expect("started process ids lock")
240            .insert(process_id.to_string());
241    }
242
243    pub(super) fn is_run_local_process(&self, process_id: &str) -> bool {
244        self.started_process_ids
245            .lock()
246            .expect("started process ids lock")
247            .contains(process_id)
248    }
249
250    pub(crate) fn process_spawn_provenance(&self) -> Option<crate::ProcessSpawnProvenance> {
251        self.process_originator
252            .clone()
253            .map(|originator| crate::ProcessSpawnProvenance {
254                originator,
255                wake_target: self.process_wake_target.clone(),
256            })
257    }
258
259    pub(super) async fn attach_captured_process_execution_env(
260        &self,
261        registration: crate::ProcessRegistration,
262    ) -> Result<crate::ProcessRegistration, crate::PluginError> {
263        if registration.env_ref.is_some() {
264            return Ok(registration);
265        }
266        match registration.input.as_ref() {
267            crate::ProcessInput::ToolCall { .. } | crate::ProcessInput::Engine { .. } => {
268                let env_ref = self.captured_process_execution_env_ref().await?;
269                Ok(registration.with_execution_env_ref(Some(env_ref)))
270            }
271            crate::ProcessInput::External { .. } | crate::ProcessInput::SessionTurn { .. } => {
272                Ok(registration)
273            }
274        }
275    }
276
277    pub async fn captured_process_execution_env_ref(
278        &self,
279    ) -> Result<crate::ProcessExecutionEnvRef, crate::PluginError> {
280        if let Some(env_ref) = self.process_env_ref.clone() {
281            return Ok(env_ref);
282        }
283        crate::persist_process_execution_env(
284            self.process_env_store.as_ref(),
285            &self.execution_env_spec,
286        )
287        .await
288    }
289
290    pub(crate) fn with_turn_phase_probe(
291        mut self,
292        probe: Option<Arc<dyn crate::runtime::RuntimeTurnPhaseProbe>>,
293    ) -> Self {
294        self.turn_phase_probe = probe;
295        self
296    }
297
298    #[doc(hidden)]
299    pub fn named_phase(&self, phase: &'static str) -> crate::runtime::RuntimeNamedPhase {
300        crate::runtime::RuntimeNamedPhase::begin(self.turn_phase_probe.clone(), phase)
301    }
302
303    pub fn parent_invocation(&self) -> Option<&crate::RuntimeInvocation> {
304        self.parent_invocation.as_ref()
305    }
306
307    pub(crate) fn with_cancellation_token(mut self, cancellation_token: CancellationToken) -> Self {
308        self.cancellation_token = Some(cancellation_token);
309        self
310    }
311
312    pub(crate) fn tool_scheduling(&self, name: &str) -> crate::ToolScheduling {
313        crate::tool_dispatch::resolve_tool_scheduling(&self.dispatch, name)
314    }
315
316    pub fn callable_tool_manifest(&self, name: &str) -> Option<crate::ToolManifest> {
317        crate::tool_dispatch::resolve_callable_manifest(&self.dispatch, name)
318    }
319
320    pub fn callable_tool_manifest_by_id(&self, id: &crate::ToolId) -> Option<crate::ToolManifest> {
321        crate::tool_dispatch::resolve_callable_manifest_by_id(&self.dispatch, id)
322    }
323
324    pub fn tool_argument_projection_policy(
325        &self,
326        name: &str,
327    ) -> crate::ToolArgumentProjectionPolicy {
328        crate::tool_dispatch::resolve_tool_argument_projection_policy(&self.dispatch, name)
329    }
330
331    pub async fn start_child_process(
332        &self,
333        registration: crate::ProcessRegistration,
334        kind: impl Into<String>,
335        label: Option<String>,
336    ) -> crate::ToolInvocationReply {
337        let _phase = self.named_phase("process.start_child");
338        let registration = match self
339            .attach_captured_process_execution_env(registration)
340            .await
341        {
342            Ok(registration) => registration,
343            Err(err) => {
344                return crate::ToolInvocationReply::error(serde_json::json!(err.to_string()));
345            }
346        };
347        let process_id = registration.id.clone();
348        let mut options = crate::ProcessStartOptions::new()
349            .with_descriptor(crate::ProcessHandleDescriptor::new(Some(kind), label));
350        if let Some(spawn) = self.process_spawn_provenance() {
351            options = options.with_spawn_provenance(spawn);
352        }
353        match self
354            .dispatch
355            .processes
356            .start(
357                &self.session_id,
358                registration,
359                options,
360                self.process_scope(self.parent_invocation.clone()),
361            )
362            .await
363        {
364            Ok(_) => {
365                self.record_started_process(&process_id);
366                crate::ToolInvocationReply::success(Self::process_handle_json(&process_id))
367            }
368            Err(err) => crate::ToolInvocationReply::error(serde_json::json!(err.to_string())),
369        }
370    }
371
372    pub async fn sleep_process(
373        &self,
374        scope: &str,
375        sequence: u64,
376        duration_ms: u64,
377    ) -> Result<(), crate::RuntimeEffectControllerError> {
378        let cancellation = self.cancellation_token.clone().unwrap_or_default();
379        let invocation = crate::runtime::causal::process_sleep_invocation(
380            &self.session_id,
381            self.parent_invocation.as_ref(),
382            scope,
383            sequence,
384        );
385        let outcome = self
386            .dispatch
387            .effect_controller
388            .controller()
389            .execute_effect(
390                crate::RuntimeEffectEnvelope::new(
391                    invocation,
392                    crate::RuntimeEffectCommand::Sleep { duration_ms },
393                ),
394                crate::RuntimeEffectLocalExecutor::sleep(cancellation),
395            )
396            .await?;
397        match outcome {
398            crate::RuntimeEffectOutcome::Sleep => Ok(()),
399            other => Err(crate::RuntimeEffectControllerError::new(
400                "runtime_effect_wrong_outcome",
401                format!("expected sleep outcome, got {}", other.kind().as_str()),
402            )),
403        }
404    }
405
406    pub async fn await_process_signal_event(
407        &self,
408        process_id: &str,
409        signal_name: &str,
410        event_ordinal: u64,
411    ) -> Result<serde_json::Value, crate::RuntimeEffectControllerError> {
412        let cancellation = self.cancellation_token.clone().unwrap_or_default();
413        let key = self
414            .dispatch
415            .effect_controller
416            .controller()
417            .await_event_key(
418                &crate::ExecutionScope::process(process_id),
419                crate::AwaitEventWaitIdentity::process_signal(
420                    process_id,
421                    signal_name,
422                    event_ordinal,
423                ),
424            )
425            .await?;
426        let invocation = crate::runtime::causal::process_await_event_invocation(
427            &self.session_id,
428            self.parent_invocation.as_ref(),
429            process_id,
430            signal_name,
431            event_ordinal,
432        );
433        let outcome = self
434            .dispatch
435            .effect_controller
436            .controller()
437            .execute_effect(
438                crate::RuntimeEffectEnvelope::new(
439                    invocation,
440                    crate::RuntimeEffectCommand::AwaitEvent { key },
441                ),
442                crate::RuntimeEffectLocalExecutor::await_event(cancellation, None),
443            )
444            .await?;
445        match outcome.into_await_event()? {
446            crate::Resolution::Ok(value) => Ok(value),
447            crate::Resolution::Err(err) => Err(crate::RuntimeEffectControllerError::new(
448                err.code,
449                err.message,
450            )),
451            crate::Resolution::Timeout => Err(crate::RuntimeEffectControllerError::new(
452                "process_signal_wait_timeout",
453                "process signal wait timed out",
454            )),
455            crate::Resolution::Cancelled => Err(crate::RuntimeEffectControllerError::new(
456                "process_signal_wait_cancelled",
457                "process signal wait was cancelled",
458            )),
459        }
460    }
461
462    pub async fn signal_process_by_id(
463        &self,
464        registry: Arc<dyn crate::ProcessRegistry>,
465        process_id: &str,
466        signal_name: &str,
467        signal_id: String,
468        payload: serde_json::Value,
469    ) -> Result<crate::ProcessEvent, crate::RuntimeEffectControllerError> {
470        let event_type = crate::process_signal_event_type(signal_name)?;
471        let replay_key = format!("process:{process_id}:signal.{signal_name}:{signal_id}");
472        let signal_payload = payload.clone();
473        let command = crate::ProcessCommand::Signal {
474            process_id: process_id.to_string(),
475            signal_name: signal_name.to_string(),
476            signal_id,
477            request: crate::ProcessEventAppendRequest::new(event_type.clone(), payload)
478                .with_replay_key(replay_key),
479        };
480        let effect_id = command.effect_id();
481        let invocation = crate::runtime::causal::process_effect_invocation(
482            &self.session_id,
483            self.parent_invocation.clone(),
484            &effect_id,
485        );
486        let outcome = self
487            .dispatch
488            .effect_controller
489            .controller()
490            .execute_effect(
491                crate::RuntimeEffectEnvelope::new(
492                    invocation,
493                    crate::RuntimeEffectCommand::process(command),
494                ),
495                crate::RuntimeEffectLocalExecutor::processes(Arc::clone(&registry)),
496            )
497            .await?;
498        match outcome.into_process()? {
499            crate::ProcessEffectOutcome::Signal { event } => {
500                let waiting_ordinal =
501                    registry
502                        .get_process(process_id)
503                        .await
504                        .and_then(|record| match record.wait {
505                            Some(crate::WaitState {
506                                kind:
507                                    crate::WaitKind::Signal {
508                                        name,
509                                        event_type: wait_event_type,
510                                        ordinal,
511                                        ..
512                                    },
513                                ..
514                            }) if name == signal_name && wait_event_type == event_type => {
515                                Some(ordinal)
516                            }
517                            _ => None,
518                        });
519                let ordinal = match waiting_ordinal {
520                    Some(ordinal) => ordinal,
521                    None => {
522                        registry
523                            .count_events_through(process_id, &event_type, event.sequence)
524                            .await?
525                    }
526                };
527                if ordinal > 0 {
528                    let key = self
529                        .dispatch
530                        .effect_controller
531                        .controller()
532                        .await_event_key(
533                            &crate::ExecutionScope::process(process_id),
534                            crate::AwaitEventWaitIdentity::process_signal(
535                                process_id,
536                                signal_name,
537                                ordinal,
538                            ),
539                        )
540                        .await?;
541                    let _ = self
542                        .dispatch
543                        .effect_controller
544                        .controller()
545                        .resolve_await_event(&key, crate::Resolution::Ok(signal_payload))
546                        .await?;
547                }
548                Ok(event)
549            }
550            other => Err(crate::RuntimeEffectControllerError::new(
551                "runtime_effect_wrong_outcome",
552                format!("expected signal outcome, got {other:?}"),
553            )),
554        }
555    }
556
557    pub async fn append_process_event(
558        &self,
559        registry: Arc<dyn crate::ProcessRegistry>,
560        process_id: &str,
561        request: crate::ProcessEventAppendRequest,
562    ) -> Result<crate::ProcessEvent, crate::PluginError> {
563        let result = registry.append_event(process_id, request).await?;
564        if let Some(context) = self.process_event_context.as_ref() {
565            crate::tool_provider::process_events::enqueue_wake_delivery(
566                context.store.clone(),
567                context.session_store_factory.as_ref(),
568                result.wake_delivery,
569                Some(self.session_graph_service()),
570                context.queued_work_poke.as_ref(),
571            )
572            .await?;
573        }
574        Ok(result.event)
575    }
576}
577
578#[cfg(test)]
579mod tests {
580    use super::*;
581    use crate::tool_dispatch::ToolDispatchContext;
582    use crate::{ToolCall, ToolProvider, ToolResult};
583
584    struct NoopTools;
585
586    #[async_trait::async_trait]
587    impl ToolProvider for NoopTools {
588        fn tool_manifests(&self) -> Vec<crate::ToolManifest> {
589            Vec::new()
590        }
591
592        fn resolve_contract(&self, _name: &str) -> Option<Arc<crate::ToolContract>> {
593            None
594        }
595
596        async fn execute(&self, _call: ToolCall<'_>) -> ToolResult {
597            ToolResult::err_fmt("not used")
598        }
599    }
600
601    #[test]
602    fn tool_argument_projection_policy_resolves_from_active_catalog_and_defaults_unknown() {
603        let tool = crate::ToolDefinition::raw(
604            "tool:seedy",
605            "seedy",
606            "Seed-aware",
607            crate::ToolDefinition::default_input_schema(),
608            serde_json::json!({ "type": "string" }),
609        )
610        .with_argument_projection(
611            crate::ToolArgumentProjectionPolicy::preserve_projected_refs_in_field("seed"),
612        );
613        let plugins = crate::plugin::PluginHost::empty()
614            .build_session("session", None)
615            .expect("plugin session");
616        let (event_tx, _event_rx) = tokio::sync::mpsc::channel(1);
617        let dispatch = Arc::new(ToolDispatchContext {
618            plugins,
619            tools: Arc::new(NoopTools),
620            tool_catalog: Arc::new(crate::ToolCatalog::from_tools(
621                vec![tool.manifest()],
622                std::collections::BTreeMap::new(),
623            )),
624            sessions: Arc::new(crate::testing::MockSessionManager::default()),
625            session_lifecycle: Arc::new(crate::testing::MockSessionManager::default()),
626            session_graph: Arc::new(crate::testing::MockSessionManager::default()),
627            processes: Arc::new(crate::UnavailableProcessService),
628            process_cancel_ability: Arc::new(crate::DefaultProcessCancelAbility),
629            trigger_router: None,
630            effect_controller: crate::runtime::RuntimeEffectControllerHandle::shared(Arc::new(
631                crate::InlineRuntimeEffectController,
632            )),
633            direct_completions: crate::DirectCompletionClient::unavailable(
634                "direct completions are unavailable in this test context",
635            ),
636            parent_invocation: None,
637            execution_env_spec: crate::ProcessExecutionEnvSpec::new(
638                crate::PluginOptions::default(),
639                crate::SessionPolicy::default(),
640            ),
641            session_id: "session".to_string(),
642            agent_frame_id: String::new(),
643            event_tx,
644            checkpoint_messages: crate::tool_dispatch::CheckpointMessageBuffer::default(),
645            trigger_outcomes: crate::tool_dispatch::ToolTriggerOutcomeBuffer::default(),
646            attachment_store: Arc::new(crate::InMemoryAttachmentStore::new()),
647            turn_context: crate::TurnContext::default(),
648        });
649        let ctx = RuntimeExecutionContext::new(
650            "session".to_string(),
651            dispatch,
652            Arc::new(crate::InMemoryProcessExecutionEnvStore::new()),
653            Arc::new(crate::InMemoryAttachmentStore::new()),
654            Arc::new(crate::ChronologicalProjection::default()),
655            None,
656            crate::TurnContext::default(),
657        );
658
659        assert_eq!(
660            ctx.tool_argument_projection_policy("seedy"),
661            crate::ToolArgumentProjectionPolicy::preserve_projected_refs_in_field("seed")
662        );
663        assert_eq!(
664            ctx.tool_argument_projection_policy("missing"),
665            crate::ToolArgumentProjectionPolicy::MaterializeProjectedValues
666        );
667    }
668}