lean_ctx/core/context_os/
context_bus.rs

1use std::collections::HashMap;
2use std::path::PathBuf;
3use std::sync::{Arc, Mutex};
4
5use chrono::{DateTime, Utc};
6use rusqlite::{params, Connection};
7use serde::{Deserialize, Serialize};
8use serde_json::Value;
9use tokio::sync::broadcast;
10
11const MAX_READ_CONNS: usize = 4;
12
13#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
14#[serde(rename_all = "snake_case")]
15pub enum ContextEventKindV1 {
16    ToolCallRecorded,
17    SessionMutated,
18    KnowledgeRemembered,
19    ArtifactStored,
20    GraphBuilt,
21    ProofAdded,
22}
23
24impl ContextEventKindV1 {
25    pub fn as_str(&self) -> &'static str {
26        match self {
27            Self::ToolCallRecorded => "tool_call_recorded",
28            Self::SessionMutated => "session_mutated",
29            Self::KnowledgeRemembered => "knowledge_remembered",
30            Self::ArtifactStored => "artifact_stored",
31            Self::GraphBuilt => "graph_built",
32            Self::ProofAdded => "proof_added",
33        }
34    }
35
36    pub fn parse(s: &str) -> Self {
37        match s.trim().to_lowercase().as_str() {
38            "tool_call_recorded" => Self::ToolCallRecorded,
39            "session_mutated" => Self::SessionMutated,
40            "knowledge_remembered" => Self::KnowledgeRemembered,
41            "artifact_stored" => Self::ArtifactStored,
42            "graph_built" => Self::GraphBuilt,
43            "proof_added" => Self::ProofAdded,
44            other => {
45                tracing::warn!(
46                    "unknown ContextEventKind '{other}', defaulting to ToolCallRecorded"
47                );
48                Self::ToolCallRecorded
49            }
50        }
51    }
52
53    /// Classifies the consistency requirement for this event kind.
54    ///
55    /// - `Local`: Agent-local, never shared (tool reads, cache hits).
56    /// - `Eventual`: Broadcast via bus, other agents see it "soon" (knowledge, artifacts).
57    /// - `Strong`: Critical decisions that require acknowledgment before proceeding.
58    pub fn consistency_level(&self) -> ConsistencyLevel {
59        match self {
60            Self::ToolCallRecorded | Self::GraphBuilt => ConsistencyLevel::Local,
61            Self::KnowledgeRemembered | Self::ArtifactStored => ConsistencyLevel::Eventual,
62            Self::SessionMutated | Self::ProofAdded => ConsistencyLevel::Strong,
63        }
64    }
65}
66
67/// Consistency requirement for shared context events.
68/// Ordered from least to most strict for filtering comparisons.
69#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
70#[serde(rename_all = "snake_case")]
71pub enum ConsistencyLevel {
72    /// Agent-local, authoritative: session task, local cache, current file set.
73    Local = 0,
74    /// Shared, eventually consistent: knowledge facts, gotchas, artifact refs.
75    Eventual = 1,
76    /// Shared, strongly consistent: workspace config, critical decisions.
77    Strong = 2,
78}
79
80impl ConsistencyLevel {
81    pub fn as_str(&self) -> &'static str {
82        match self {
83            Self::Local => "local",
84            Self::Eventual => "eventual",
85            Self::Strong => "strong",
86        }
87    }
88}
89
90#[derive(Debug, Clone, Serialize, Deserialize)]
91#[serde(rename_all = "camelCase")]
92pub struct ContextEventV1 {
93    pub id: i64,
94    pub workspace_id: String,
95    pub channel_id: String,
96    pub kind: String,
97    pub actor: Option<String>,
98    pub timestamp: DateTime<Utc>,
99    pub version: i64,
100    #[serde(skip_serializing_if = "Option::is_none")]
101    pub parent_id: Option<i64>,
102    pub consistency_level: String,
103    pub payload: Value,
104    #[serde(skip_serializing_if = "Option::is_none", default)]
105    pub target_agents: Option<Vec<String>>,
106}
107
108impl ContextEventV1 {
109    pub fn consistency(&self) -> ConsistencyLevel {
110        ContextEventKindV1::parse(&self.kind).consistency_level()
111    }
112
113    pub fn is_visible_to_agent(&self, agent_id: &str) -> bool {
114        match &self.target_agents {
115            None => true,
116            Some(targets) => targets.iter().any(|t| t == agent_id),
117        }
118    }
119}
120
121/// Filter for selective event subscriptions.
122/// All fields are optional; `None` means "accept all".
123#[derive(Debug, Clone, Default)]
124pub struct TopicFilter {
125    pub kinds: Option<Vec<ContextEventKindV1>>,
126    pub actors: Option<Vec<String>>,
127    pub min_consistency: Option<ConsistencyLevel>,
128    pub agent_id: Option<String>,
129}
130
131impl TopicFilter {
132    /// Convenience constructor: filter by event kind strings.
133    pub fn kinds(kind_strs: &[&str]) -> Self {
134        Self {
135            kinds: Some(
136                kind_strs
137                    .iter()
138                    .map(|s| ContextEventKindV1::parse(s))
139                    .collect(),
140            ),
141            ..Self::default()
142        }
143    }
144
145    pub fn matches(&self, event: &ContextEventV1) -> bool {
146        if let Some(ref kinds) = self.kinds {
147            let parsed = ContextEventKindV1::parse(&event.kind);
148            if !kinds.contains(&parsed) {
149                return false;
150            }
151        }
152        if let Some(ref actors) = self.actors {
153            match &event.actor {
154                Some(actor) if actors.iter().any(|a| a == actor) => {}
155                Some(_) | None => return false,
156            }
157        }
158        if let Some(min) = self.min_consistency {
159            if event.consistency() < min {
160                return false;
161            }
162        }
163        if let Some(ref aid) = self.agent_id {
164            if !event.is_visible_to_agent(aid) {
165                return false;
166            }
167        }
168        true
169    }
170}
171
172fn event_from_row(row: &rusqlite::Row<'_>) -> rusqlite::Result<ContextEventV1> {
173    let ts_str: String = row.get(5)?;
174    let ts = DateTime::parse_from_rfc3339(&ts_str)
175        .map_or_else(|_| Utc::now(), |d| d.with_timezone(&Utc));
176    let payload_str: String = row.get(6)?;
177    let payload: Value = serde_json::from_str(&payload_str).unwrap_or(Value::Null);
178    let kind_str: String = row.get(3)?;
179    let cl = ContextEventKindV1::parse(&kind_str)
180        .consistency_level()
181        .as_str()
182        .to_string();
183    Ok(ContextEventV1 {
184        id: row.get(0)?,
185        workspace_id: row.get(1)?,
186        channel_id: row.get(2)?,
187        kind: kind_str,
188        actor: row.get::<_, Option<String>>(4)?,
189        timestamp: ts,
190        version: row.get::<_, i64>(7).unwrap_or(0),
191        parent_id: row.get::<_, Option<i64>>(8).ok().flatten(),
192        consistency_level: cl,
193        payload,
194        target_agents: None,
195    })
196}
197
198#[derive(Clone)]
199pub struct ContextBus {
200    inner: Arc<Inner>,
201}
202
203const STREAM_CHANNEL_SIZE: usize = 256;
204
205struct Inner {
206    write_conn: Mutex<Connection>,
207    read_pool: Mutex<Vec<Connection>>,
208    streams: Mutex<HashMap<String, broadcast::Sender<ContextEventV1>>>,
209    version_cache: Mutex<HashMap<String, i64>>,
210    db_path: PathBuf,
211}
212
213impl Inner {
214    fn open_read_conn(path: &PathBuf) -> Connection {
215        let conn = Connection::open(path).expect("open read context-os db");
216        let _ = conn.execute_batch("PRAGMA journal_mode=WAL; PRAGMA query_only=ON;");
217        conn
218    }
219
220    fn take_read_conn(&self) -> Connection {
221        self.read_pool
222            .lock()
223            .unwrap_or_else(std::sync::PoisonError::into_inner)
224            .pop()
225            .unwrap_or_else(|| Self::open_read_conn(&self.db_path))
226    }
227
228    fn return_read_conn(&self, conn: Connection) {
229        let mut pool = self
230            .read_pool
231            .lock()
232            .unwrap_or_else(std::sync::PoisonError::into_inner);
233        if pool.len() < MAX_READ_CONNS {
234            pool.push(conn);
235        }
236    }
237
238    fn stream_key(workspace_id: &str, channel_id: &str) -> String {
239        format!("{workspace_id}\0{channel_id}")
240    }
241
242    fn next_version(&self, workspace_id: &str, channel_id: &str) -> i64 {
243        let key = Self::stream_key(workspace_id, channel_id);
244
245        {
246            let mut cache = self
247                .version_cache
248                .lock()
249                .unwrap_or_else(std::sync::PoisonError::into_inner);
250            if let Some(v) = cache.get_mut(&key) {
251                *v += 1;
252                return *v;
253            }
254        }
255
256        let conn = self.take_read_conn();
257        let v: i64 = conn
258            .query_row(
259                "SELECT COALESCE(MAX(version), 0) FROM context_events WHERE workspace_id = ?1 AND channel_id = ?2",
260                params![workspace_id, channel_id],
261                |row| row.get(0),
262            )
263            .unwrap_or(0);
264        self.return_read_conn(conn);
265
266        let mut cache = self
267            .version_cache
268            .lock()
269            .unwrap_or_else(std::sync::PoisonError::into_inner);
270        let entry = cache.entry(key).or_insert(v);
271        *entry = (*entry).max(v) + 1;
272        *entry
273    }
274}
275
276impl Default for ContextBus {
277    fn default() -> Self {
278        Self::new()
279    }
280}
281
282impl ContextBus {
283    pub fn new() -> Self {
284        let path = default_db_path();
285        Self::open_at(path)
286    }
287
288    fn open_at(path: PathBuf) -> Self {
289        if let Some(parent) = path.parent() {
290            let _ = std::fs::create_dir_all(parent);
291        }
292        let conn = Connection::open(&path).expect("open context-os db");
293        conn.execute_batch(
294            "PRAGMA journal_mode=WAL;
295             CREATE TABLE IF NOT EXISTS context_events (
296               id INTEGER PRIMARY KEY AUTOINCREMENT,
297               workspace_id TEXT NOT NULL,
298               channel_id TEXT NOT NULL,
299               kind TEXT NOT NULL,
300               actor TEXT,
301               timestamp TEXT NOT NULL,
302               payload_json TEXT NOT NULL,
303               version INTEGER NOT NULL DEFAULT 0,
304               parent_id INTEGER
305             );
306             CREATE INDEX IF NOT EXISTS idx_context_events_stream
307               ON context_events(workspace_id, channel_id, id);",
308        )
309        .expect("init context-os db");
310
311        let _ = conn.execute_batch(
312            "ALTER TABLE context_events ADD COLUMN version INTEGER NOT NULL DEFAULT 0;",
313        );
314        let _ = conn.execute_batch("ALTER TABLE context_events ADD COLUMN parent_id INTEGER;");
315
316        let _ = conn.execute_batch(
317            "CREATE VIRTUAL TABLE IF NOT EXISTS context_events_fts USING fts5(
318               payload_text,
319               content=context_events,
320               content_rowid=id
321             );",
322        );
323
324        let mut read_conns = Vec::with_capacity(MAX_READ_CONNS);
325        for _ in 0..MAX_READ_CONNS {
326            read_conns.push(Inner::open_read_conn(&path));
327        }
328
329        Self {
330            inner: Arc::new(Inner {
331                write_conn: Mutex::new(conn),
332                read_pool: Mutex::new(read_conns),
333                streams: Mutex::new(HashMap::new()),
334                version_cache: Mutex::new(HashMap::new()),
335                db_path: path,
336            }),
337        }
338    }
339
340    pub fn subscribe(
341        &self,
342        workspace_id: &str,
343        channel_id: &str,
344    ) -> broadcast::Receiver<ContextEventV1> {
345        let key = Inner::stream_key(workspace_id, channel_id);
346        let mut streams = self
347            .inner
348            .streams
349            .lock()
350            .unwrap_or_else(std::sync::PoisonError::into_inner);
351        let tx = streams
352            .entry(key)
353            .or_insert_with(|| broadcast::channel(STREAM_CHANNEL_SIZE).0);
354        tx.subscribe()
355    }
356
357    /// Subscribe with a filter — only events matching the filter are delivered.
358    /// Returns `(Receiver, TopicFilter)` for use in filtered receive loops.
359    pub fn subscribe_filtered(
360        &self,
361        workspace_id: &str,
362        channel_id: &str,
363        filter: TopicFilter,
364    ) -> FilteredSubscription {
365        let rx = self.subscribe(workspace_id, channel_id);
366        FilteredSubscription { rx, filter }
367    }
368
369    pub fn append(
370        &self,
371        workspace_id: &str,
372        channel_id: &str,
373        kind: &ContextEventKindV1,
374        actor: Option<&str>,
375        payload: Value,
376    ) -> Option<ContextEventV1> {
377        self.append_with_parent(workspace_id, channel_id, kind, actor, payload, None)
378    }
379
380    pub fn append_with_parent(
381        &self,
382        workspace_id: &str,
383        channel_id: &str,
384        kind: &ContextEventKindV1,
385        actor: Option<&str>,
386        payload: Value,
387        parent_id: Option<i64>,
388    ) -> Option<ContextEventV1> {
389        let ev = self.insert_event(
390            workspace_id,
391            channel_id,
392            kind,
393            actor,
394            payload,
395            parent_id,
396            None,
397        )?;
398        self.broadcast_event(&ev);
399        Some(ev)
400    }
401
402    /// Append an event directed at specific agents only.
403    /// Only subscribers whose `TopicFilter.agent_id` matches a target will see it.
404    pub fn append_directed(
405        &self,
406        workspace_id: &str,
407        channel_id: &str,
408        kind: &ContextEventKindV1,
409        actor: Option<&str>,
410        payload: Value,
411        target_agents: Vec<String>,
412    ) -> Option<ContextEventV1> {
413        let ev = self.insert_event(
414            workspace_id,
415            channel_id,
416            kind,
417            actor,
418            payload,
419            None,
420            Some(target_agents),
421        )?;
422        self.broadcast_event(&ev);
423        Some(ev)
424    }
425
426    fn insert_event(
427        &self,
428        workspace_id: &str,
429        channel_id: &str,
430        kind: &ContextEventKindV1,
431        actor: Option<&str>,
432        payload: Value,
433        parent_id: Option<i64>,
434        target_agents: Option<Vec<String>>,
435    ) -> Option<ContextEventV1> {
436        let ts = Utc::now();
437        let payload_json = payload.to_string();
438
439        let (id, version) = {
440            let Ok(conn) = self.inner.write_conn.lock() else {
441                return None;
442            };
443            let version = self.inner.next_version(workspace_id, channel_id);
444
445            let result: Result<(i64, i64), rusqlite::Error> = conn
446                .execute_batch("BEGIN IMMEDIATE")
447                .and_then(|()| {
448                    conn.execute(
449                        "INSERT INTO context_events (workspace_id, channel_id, kind, actor, timestamp, payload_json, version, parent_id)
450                         VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8)",
451                        params![
452                            workspace_id,
453                            channel_id,
454                            kind.as_str(),
455                            actor.map(str::to_string),
456                            ts.to_rfc3339(),
457                            payload_json,
458                            version,
459                            parent_id,
460                        ],
461                    )?;
462                    let rowid = conn.last_insert_rowid();
463                    if let Err(e) = conn.execute(
464                        "INSERT INTO context_events_fts(rowid, payload_text) VALUES (?1, ?2)",
465                        params![rowid, payload_json],
466                    ) {
467                        tracing::warn!("FTS insert failed for event {rowid}: {e}");
468                    }
469                    conn.execute_batch("COMMIT")?;
470                    Ok((rowid, version))
471                });
472
473            match result {
474                Ok(pair) => pair,
475                Err(e) => {
476                    tracing::warn!("context bus append failed: {e}");
477                    let _ = conn.execute_batch("ROLLBACK");
478                    return None;
479                }
480            }
481        };
482
483        Some(ContextEventV1 {
484            id,
485            workspace_id: workspace_id.to_string(),
486            channel_id: channel_id.to_string(),
487            consistency_level: kind.consistency_level().as_str().to_string(),
488            kind: kind.as_str().to_string(),
489            actor: actor.map(str::to_string),
490            timestamp: ts,
491            version,
492            parent_id,
493            payload,
494            target_agents,
495        })
496    }
497
498    fn broadcast_event(&self, ev: &ContextEventV1) {
499        let key = Inner::stream_key(&ev.workspace_id, &ev.channel_id);
500        let tx = self
501            .inner
502            .streams
503            .lock()
504            .unwrap_or_else(std::sync::PoisonError::into_inner)
505            .get(&key)
506            .cloned();
507        if let Some(tx) = tx {
508            let _ = tx.send(ev.clone());
509        }
510    }
511
512    pub fn read(
513        &self,
514        workspace_id: &str,
515        channel_id: &str,
516        since: i64,
517        limit: usize,
518    ) -> Vec<ContextEventV1> {
519        let limit = limit.clamp(1, 1000) as i64;
520        let conn = self.inner.take_read_conn();
521        let result = (|| {
522            let mut stmt = conn.prepare(
523                "SELECT id, workspace_id, channel_id, kind, actor, timestamp, payload_json, version, parent_id
524                 FROM context_events
525                 WHERE workspace_id = ?1 AND channel_id = ?2 AND id > ?3
526                 ORDER BY id ASC
527                 LIMIT ?4",
528            ).ok()?;
529            let rows = stmt
530                .query_map(
531                    params![workspace_id, channel_id, since, limit],
532                    event_from_row,
533                )
534                .ok()?;
535            Some(rows.flatten().collect::<Vec<_>>())
536        })();
537        self.inner.return_read_conn(conn);
538        result.unwrap_or_default()
539    }
540
541    /// Query recent events of a specific kind (for conflict detection).
542    pub fn recent_by_kind(
543        &self,
544        workspace_id: &str,
545        channel_id: &str,
546        kind: &str,
547        limit: usize,
548    ) -> Vec<ContextEventV1> {
549        let limit = limit.clamp(1, 100) as i64;
550        let conn = self.inner.take_read_conn();
551        let result = (|| {
552            let mut stmt = conn.prepare(
553                "SELECT id, workspace_id, channel_id, kind, actor, timestamp, payload_json, version, parent_id
554                 FROM context_events
555                 WHERE workspace_id = ?1 AND channel_id = ?2 AND kind = ?3
556                 ORDER BY id DESC
557                 LIMIT ?4",
558            ).ok()?;
559            let rows = stmt
560                .query_map(
561                    params![workspace_id, channel_id, kind, limit],
562                    event_from_row,
563                )
564                .ok()?;
565            Some(rows.flatten().collect::<Vec<_>>())
566        })();
567        self.inner.return_read_conn(conn);
568        result.unwrap_or_default()
569    }
570
571    /// Full-text search over event payloads via FTS5.
572    pub fn search(
573        &self,
574        workspace_id: &str,
575        channel_id: Option<&str>,
576        query: &str,
577        limit: usize,
578    ) -> Vec<ContextEventV1> {
579        let limit = limit.clamp(1, 100) as i64;
580        let conn = self.inner.take_read_conn();
581        let result =
582            if let Some(ch) = channel_id {
583                (|| {
584                    let mut stmt = conn.prepare(
585                    "SELECT e.id, e.workspace_id, e.channel_id, e.kind, e.actor, e.timestamp,
586                            e.payload_json, e.version, e.parent_id
587                     FROM context_events e
588                     JOIN context_events_fts f ON e.id = f.rowid
589                     WHERE f.payload_text MATCH ?1 AND e.workspace_id = ?2 AND e.channel_id = ?3
590                     ORDER BY f.rank
591                     LIMIT ?4",
592                ).ok()?;
593                    let rows = stmt
594                        .query_map(params![query, workspace_id, ch, limit], event_from_row)
595                        .ok()?;
596                    Some(rows.flatten().collect::<Vec<_>>())
597                })()
598            } else {
599                (|| {
600                    let mut stmt = conn.prepare(
601                    "SELECT e.id, e.workspace_id, e.channel_id, e.kind, e.actor, e.timestamp,
602                            e.payload_json, e.version, e.parent_id
603                     FROM context_events e
604                     JOIN context_events_fts f ON e.id = f.rowid
605                     WHERE f.payload_text MATCH ?1 AND e.workspace_id = ?2
606                     ORDER BY f.rank
607                     LIMIT ?3",
608                ).ok()?;
609                    let rows = stmt
610                        .query_map(params![query, workspace_id, limit], event_from_row)
611                        .ok()?;
612                    Some(rows.flatten().collect::<Vec<_>>())
613                })()
614            };
615        self.inner.return_read_conn(conn);
616        result.unwrap_or_default()
617    }
618
619    /// Trace the causal lineage of an event by following parent_id chains.
620    /// Only returns events belonging to the given workspace (tenant isolation).
621    pub fn lineage(
622        &self,
623        event_id: i64,
624        workspace_id: &str,
625        max_depth: usize,
626    ) -> Vec<ContextEventV1> {
627        let max_depth = max_depth.clamp(1, 50);
628        let conn = self.inner.take_read_conn();
629        let mut chain = Vec::new();
630        let mut current_id = Some(event_id);
631
632        for _ in 0..max_depth {
633            let Some(id) = current_id else {
634                break;
635            };
636            let ev = conn.query_row(
637                "SELECT id, workspace_id, channel_id, kind, actor, timestamp, payload_json, version, parent_id
638                 FROM context_events WHERE id = ?1 AND workspace_id = ?2",
639                params![id, workspace_id],
640                event_from_row,
641            );
642            match ev {
643                Ok(ev) => {
644                    current_id = ev.parent_id;
645                    chain.push(ev);
646                }
647                Err(_) => break,
648            }
649        }
650        self.inner.return_read_conn(conn);
651        chain
652    }
653
654    /// Returns the highest event id for a workspace/channel pair, or 0 if none.
655    pub fn latest_id(&self, workspace_id: &str, channel_id: &str) -> i64 {
656        let conn = self.inner.take_read_conn();
657        let result = conn
658            .query_row(
659                "SELECT COALESCE(MAX(id), 0) FROM context_events WHERE workspace_id = ?1 AND channel_id = ?2",
660                params![workspace_id, channel_id],
661                |row| row.get(0),
662            )
663            .unwrap_or(0);
664        self.inner.return_read_conn(conn);
665        result
666    }
667}
668
669/// A subscription wrapper that applies a [`TopicFilter`] to received events.
670pub struct FilteredSubscription {
671    pub rx: broadcast::Receiver<ContextEventV1>,
672    pub filter: TopicFilter,
673}
674
675impl FilteredSubscription {
676    /// Receive the next event that matches the filter.
677    /// Skips non-matching events silently.
678    pub async fn recv_filtered(&mut self) -> Result<ContextEventV1, broadcast::error::RecvError> {
679        loop {
680            let ev = self.rx.recv().await?;
681            if self.filter.matches(&ev) {
682                return Ok(ev);
683            }
684        }
685    }
686}
687
688fn default_db_path() -> PathBuf {
689    let data = crate::core::data_dir::lean_ctx_data_dir().unwrap_or_else(|_| PathBuf::from("."));
690    data.join("context-os").join("context-os.db")
691}
692
693#[cfg(test)]
694mod tests {
695    use super::*;
696    use tempfile::tempdir;
697
698    fn test_bus() -> (ContextBus, tempfile::TempDir) {
699        let td = tempdir().expect("tempdir");
700        let bus = ContextBus::open_at(td.path().join("test-context-os.db"));
701        (bus, td)
702    }
703
704    #[test]
705    fn append_and_read_roundtrip() {
706        let (bus, _td) = test_bus();
707        let ev = bus
708            .append(
709                "ws",
710                "ch",
711                &ContextEventKindV1::ToolCallRecorded,
712                Some("agent"),
713                serde_json::json!({"tool":"ctx_read"}),
714            )
715            .expect("append");
716        let got = bus.read("ws", "ch", ev.id - 1, 10);
717        assert!(got.iter().any(|e| e.id == ev.id));
718    }
719
720    #[test]
721    fn multi_client_concurrent_appends_have_deterministic_ordering() {
722        let (bus, _td) = test_bus();
723        let bus = Arc::new(bus);
724        let n_clients = 5;
725        let n_events_per_client = 20;
726        let ws = format!("ws-concurrent-{}", std::process::id());
727        let ch = format!("ch-concurrent-{}", std::process::id());
728
729        let mut handles = vec![];
730        for client_idx in 0..n_clients {
731            let bus = Arc::clone(&bus);
732            let ws = ws.clone();
733            let ch = ch.clone();
734            handles.push(std::thread::spawn(move || {
735                let agent = format!("agent-{client_idx}");
736                for event_idx in 0..n_events_per_client {
737                    bus.append(
738                        &ws,
739                        &ch,
740                        &ContextEventKindV1::ToolCallRecorded,
741                        Some(&agent),
742                        serde_json::json!({"client": client_idx, "seq": event_idx}),
743                    );
744                }
745            }));
746        }
747
748        for h in handles {
749            h.join().unwrap();
750        }
751
752        let all = bus.read(&ws, &ch, 0, 1000);
753        assert_eq!(
754            all.len(),
755            n_clients * n_events_per_client,
756            "all events should be persisted"
757        );
758
759        let ids: Vec<i64> = all.iter().map(|e| e.id).collect();
760        let mut sorted = ids.clone();
761        sorted.sort_unstable();
762        assert_eq!(ids, sorted, "events must be in strictly ascending ID order");
763
764        for win in ids.windows(2) {
765            assert!(
766                win[1] > win[0],
767                "IDs must be strictly monotonic (no gaps from concurrent access)"
768            );
769        }
770    }
771
772    #[test]
773    fn workspace_channel_isolation() {
774        let (bus, _td) = test_bus();
775        let pid = std::process::id();
776        let ws_a = format!("ws-iso-a-{pid}");
777        let ws_b = format!("ws-iso-b-{pid}");
778        let ws_c = format!("ws-iso-c-{pid}");
779        let ch1 = format!("ch-iso-1-{pid}");
780        let ch2 = format!("ch-iso-2-{pid}");
781
782        bus.append(
783            &ws_a,
784            &ch1,
785            &ContextEventKindV1::SessionMutated,
786            Some("agent-a"),
787            serde_json::json!({"ws":"a","ch":"1"}),
788        );
789        bus.append(
790            &ws_a,
791            &ch2,
792            &ContextEventKindV1::KnowledgeRemembered,
793            Some("agent-a"),
794            serde_json::json!({"ws":"a","ch":"2"}),
795        );
796        bus.append(
797            &ws_b,
798            &ch1,
799            &ContextEventKindV1::ArtifactStored,
800            Some("agent-b"),
801            serde_json::json!({"ws":"b","ch":"1"}),
802        );
803
804        let ws_a_ch_1 = bus.read(&ws_a, &ch1, 0, 100);
805        assert_eq!(ws_a_ch_1.len(), 1);
806        assert_eq!(ws_a_ch_1[0].kind, "session_mutated");
807
808        let ws_a_ch_2 = bus.read(&ws_a, &ch2, 0, 100);
809        assert_eq!(ws_a_ch_2.len(), 1);
810        assert_eq!(ws_a_ch_2[0].kind, "knowledge_remembered");
811
812        let ws_b_ch_1 = bus.read(&ws_b, &ch1, 0, 100);
813        assert_eq!(ws_b_ch_1.len(), 1);
814        assert_eq!(ws_b_ch_1[0].kind, "artifact_stored");
815
816        let ws_c_ch_1 = bus.read(&ws_c, &ch1, 0, 100);
817        assert!(ws_c_ch_1.is_empty(), "non-existent workspace returns empty");
818    }
819
820    #[test]
821    fn replay_from_cursor_returns_only_newer_events() {
822        let (bus, _td) = test_bus();
823        let pid = std::process::id();
824        let ws = &format!("ws-replay-{pid}");
825        let ch = &format!("ch-replay-{pid}");
826
827        let ev1 = bus
828            .append(
829                ws,
830                ch,
831                &ContextEventKindV1::ToolCallRecorded,
832                None,
833                serde_json::json!({"seq":1}),
834            )
835            .unwrap();
836        let ev2 = bus
837            .append(
838                ws,
839                ch,
840                &ContextEventKindV1::SessionMutated,
841                None,
842                serde_json::json!({"seq":2}),
843            )
844            .unwrap();
845        let _ev3 = bus
846            .append(
847                ws,
848                ch,
849                &ContextEventKindV1::GraphBuilt,
850                None,
851                serde_json::json!({"seq":3}),
852            )
853            .unwrap();
854
855        let from_cursor = bus.read(ws, ch, ev2.id, 100);
856        assert_eq!(from_cursor.len(), 1, "only events after cursor");
857        assert_eq!(from_cursor[0].kind, "graph_built");
858
859        let from_first = bus.read(ws, ch, ev1.id, 100);
860        assert_eq!(from_first.len(), 2, "events after first");
861
862        let from_zero = bus.read(ws, ch, 0, 100);
863        assert_eq!(from_zero.len(), 3, "all events from zero");
864    }
865
866    #[test]
867    fn broadcast_subscriber_receives_events() {
868        let (bus, _td) = test_bus();
869        let mut rx = bus.subscribe("ws", "ch");
870
871        let ev = bus
872            .append(
873                "ws",
874                "ch",
875                &ContextEventKindV1::ProofAdded,
876                Some("verifier"),
877                serde_json::json!({"proof":"hash"}),
878            )
879            .unwrap();
880
881        let received = rx.try_recv().expect("subscriber should receive event");
882        assert_eq!(received.id, ev.id);
883        assert_eq!(received.kind, "proof_added");
884        assert_eq!(received.actor.as_deref(), Some("verifier"));
885    }
886}
lean_ctx/core/context_os/context_bus.rs

lean_ctx/core/context_os/
context_bus.rs
